---
_id: '9947'
abstract:
- lang: eng
  text: This paper presents a comparison of a number of prognostic methods with regard
    to algorithm complexity and performance based on prognostic metrics. This information
    serves as a guide for selection and design of prognostic systems for real-time
    condition monitoring of technical systems. The methods are evaluated on ability
    to estimate the remaining useful life of rolling element bearing. Run-to failure
    vibration and temperature data is used in the analysis. The sampled prognostic
    methods include wear-temperature correlation method, health state estimation using
    temperature measurement, a multi-model particle filter approach with model parameter
    adaptation utilizing temperature measurements, prognostics through health state
    estimation and mapping extracted features to the remaining useful life through
    regression approach. Although the performance of the methods utilizing the vibration
    measurements is much better than the methods using temperature measurements, the
    methods using temperature measurements are quite promising in terms of reducing
    the overall cost of the condition monitoring system as well as the computational
    time. An ensemble of the presented methods through weighted average is also introduced.
    The results show that the methods are able to estimate the remaining useful life
    within error bounds of +-15\%, which can be further reduced to +-5\% with the
    ensemble approach.
author:
- first_name: James Kuria
  full_name: Kimotho, James Kuria
  last_name: Kimotho
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Kimotho JK, Sextro W. Comparison and ensemble of temperature-based and vibration-based
    methods for machinery prognostics. In: <i>Annual Conference of the Prognostics
    and Health Management Society 2015</i>. Vol 6. ; 2015.'
  apa: Kimotho, J. K., &#38; Sextro, W. (2015). Comparison and ensemble of temperature-based
    and vibration-based methods for machinery prognostics. In <i>Annual Conference
    of the Prognostics and Health Management Society 2015</i> (Vol. 6).
  bibtex: '@inproceedings{Kimotho_Sextro_2015, title={Comparison and ensemble of temperature-based
    and vibration-based methods for machinery prognostics}, volume={6}, booktitle={Annual
    Conference of the Prognostics and Health Management Society 2015}, author={Kimotho,
    James Kuria and Sextro, Walter}, year={2015} }'
  chicago: Kimotho, James Kuria, and Walter Sextro. “Comparison and Ensemble of Temperature-Based
    and Vibration-Based Methods for Machinery Prognostics.” In <i>Annual Conference
    of the Prognostics and Health Management Society 2015</i>, Vol. 6, 2015.
  ieee: J. K. Kimotho and W. Sextro, “Comparison and ensemble of temperature-based
    and vibration-based methods for machinery prognostics,” in <i>Annual Conference
    of the Prognostics and Health Management Society 2015</i>, 2015, vol. 6.
  mla: Kimotho, James Kuria, and Walter Sextro. “Comparison and Ensemble of Temperature-Based
    and Vibration-Based Methods for Machinery Prognostics.” <i>Annual Conference of
    the Prognostics and Health Management Society 2015</i>, vol. 6, 2015.
  short: 'J.K. Kimotho, W. Sextro, in: Annual Conference of the Prognostics and Health
    Management Society 2015, 2015.'
date_created: 2019-05-27T08:24:50Z
date_updated: 2019-05-27T08:25:44Z
department:
- _id: '151'
intvolume: '         6'
keyword:
- ensemble methods
- combined prognostics
- data fusion
language:
- iso: eng
publication: Annual Conference of the Prognostics and Health Management Society 2015
status: public
title: Comparison and ensemble of temperature-based and vibration-based methods for
  machinery prognostics
type: conference
user_id: '55222'
volume: 6
year: '2015'
...
---
_id: '9949'
abstract:
- lang: eng
  text: Intelligent mechatronic systems other the possibility to adapt system behavior
    to current dependability. This can be used to assure reliability by controlling
    system behavior to reach a pre-defined lifetime. By using such closed loop control,
    the margin of error of useful lifetime of an individual system is lowered. It
    is also possible to change the pre-defined lifetime during operation, by adapting
    system behavior to derate component usage. When planning maintenance actions,
    the remaining useful lifetime of each individual system has to be taken into account.
    Usually, stochastic properties of a fleet of systems are analyzed to create maintenance
    plans. Among these, the main factor is the probability of an individual system
    to last until maintenance. If condition-based maintenance is used, this is updated
    for each individual system using available information about its current state.
    By lowering the margin of error of useful lifetime, which directly corresponds
    to the time until maintenance, extended maintenance periods are made possible.
    Also using reliability-adaptive operation, a reversal of degradation driven maintenance
    planning is possible where a maintenance plan is setup not only according to system
    properties, but mainly to requirements imposed by maintenance personnel or infrastructure.
    Each system then adapts its behavior accordingly and fails according to the maintenance
    plan, making better use of maintenance personnel and system capabilities at the
    same time. In this contribution, the potential of maintenance plan driven system
    behavior adaptation is shown. A model including adaptation process and maintenance
    actions is simulated over full system lifetime to assess the advantages gained.
author:
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Thorben
  full_name: Kaul, Thorben
  id: '14802'
  last_name: Kaul
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Meyer T, Kaul T, Sextro W. Advantages of reliability-adaptive system operation
    for maintenance planning. In: <i>Proceedings of the 9th IFAC Symposium on Fault
    Detection, Supervision and Safety for Technical Processes</i>. ; 2015:940-945.
    doi:<a href="https://doi.org/10.1016/j.ifacol.2015.09.647">10.1016/j.ifacol.2015.09.647</a>'
  apa: Meyer, T., Kaul, T., &#38; Sextro, W. (2015). Advantages of reliability-adaptive
    system operation for maintenance planning. In <i>Proceedings of the 9th IFAC Symposium
    on Fault Detection, Supervision and Safety for Technical Processes</i> (pp. 940–945).
    <a href="https://doi.org/10.1016/j.ifacol.2015.09.647">https://doi.org/10.1016/j.ifacol.2015.09.647</a>
  bibtex: '@inproceedings{Meyer_Kaul_Sextro_2015, title={Advantages of reliability-adaptive
    system operation for maintenance planning}, DOI={<a href="https://doi.org/10.1016/j.ifacol.2015.09.647">10.1016/j.ifacol.2015.09.647</a>},
    booktitle={Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision
    and Safety for Technical Processes}, author={Meyer, Tobias and Kaul, Thorben and
    Sextro, Walter}, year={2015}, pages={940–945} }'
  chicago: Meyer, Tobias, Thorben Kaul, and Walter Sextro. “Advantages of Reliability-Adaptive
    System Operation for Maintenance Planning.” In <i>Proceedings of the 9th IFAC
    Symposium on Fault Detection, Supervision and Safety for Technical Processes</i>,
    940–45, 2015. <a href="https://doi.org/10.1016/j.ifacol.2015.09.647">https://doi.org/10.1016/j.ifacol.2015.09.647</a>.
  ieee: T. Meyer, T. Kaul, and W. Sextro, “Advantages of reliability-adaptive system
    operation for maintenance planning,” in <i>Proceedings of the 9th IFAC Symposium
    on Fault Detection, Supervision and Safety for Technical Processes</i>, 2015,
    pp. 940–945.
  mla: Meyer, Tobias, et al. “Advantages of Reliability-Adaptive System Operation
    for Maintenance Planning.” <i>Proceedings of the 9th IFAC Symposium on Fault Detection,
    Supervision and Safety for Technical Processes</i>, 2015, pp. 940–45, doi:<a href="https://doi.org/10.1016/j.ifacol.2015.09.647">10.1016/j.ifacol.2015.09.647</a>.
  short: 'T. Meyer, T. Kaul, W. Sextro, in: Proceedings of the 9th IFAC Symposium
    on Fault Detection, Supervision and Safety for Technical Processes, 2015, pp.
    940–945.'
date_created: 2019-05-27T08:29:40Z
date_updated: 2019-09-16T10:43:42Z
department:
- _id: '151'
doi: 10.1016/j.ifacol.2015.09.647
keyword:
- Adaptive systems
- Reliability analysis
- Availability
- Adaptive control
- Maintenance
- Self-optimizing systems
- Self-optimizing control
- Stochastic Petri-nets
language:
- iso: eng
page: 940-945
publication: Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision
  and Safety for Technical Processes
quality_controlled: '1'
status: public
title: Advantages of reliability-adaptive system operation for maintenance planning
type: conference
user_id: '55222'
year: '2015'
...
---
_id: '9950'
abstract:
- lang: eng
  text: Intelligente technische Systeme, die in der Lage sind, sich an geänderte Umgebungsbedingungen
    anzupassen, ermöglichen eine Adaption anhand der aktuell erreichten Zuverlässigkeit.
    Zu diesem Zwecke kann ein geschlossener Regelkreis formuliert werden, der dazu
    geeignet ist, den Betriebspunkt des Systems während der gesamten Lebensdauer anzupassen.
    Dadurch wird eine harte Umschaltung während des Betriebs vermieden und die Verhaltensanpassung
    ist vom Nutzer weitgehend unbemerkt möglich. Dazu wird die aktuelle Restlebensdauer
    mit einer vorgegebenen Restlebensdauer verglichen. Durch Änderung der vorgegebenen
    Restlebensdauer lässt sich auch eine Anpassung der gewünschten Nutzungsdauer erreichen,
    beispielsweise um veränderte Wartungsintervalle einzuhalten. Zu diesem Zwecke
    ist es allerdings notwendig, die aktuell erreichte Zuverlässigkeit zu schätzen.
    Für die Regelung ist dabei die aktuelle Restlebensdauer der wichtigste Parameter,
    da er als Istwert direkt mit der gewünschten Restlebensdauer als Sollwert verglichen
    wird und als Reglereingang dient. Für die Genauigkeit der Regelung ist daher die
    Bestimmung der Restlebensdauer von entscheidender Bedeutung. Es wird ein Modell
    des Regelkreises vorgestellt, das auch den Einfluss einer fehlerhaften Restlebensdauerschätzung
    auf die Verhaltensanpassung abbildet. Dadurch ist es möglich, Grenzen der Verhaltensanpassung
    und die zur Einhaltung notwendige Genauigkeit der Restlebensdauerschätzung zu
    bestimmen. Es gibt zahlreiche Ansätze, die Restlebensdauer zu schätzen, die aufgeteilt
    werden in modellbasierte Verfahren und datengetriebene Verfahren. Die individuelle
    Eignung eines jeden Verfahrens sowie die Modellbildung oder die Nutzung geeigneter
    Algorithmen ist stark systemabhängig. Um die Auswahl von Verfahren und Modellen
    oder Algorithmen zu ermöglichen, werden zunächst die Anforderungen an die Restlebensdauerschätzung
    zur Nutzung als Regelungs-Istwert bestimmt. Verschiedene Verfahren werden sodann
    hinsichtlich ihrer Eignung evaluiert und Anwendungsgrenzen aufgezeigt.
author:
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: James Kuria
  full_name: Kimotho, James Kuria
  last_name: Kimotho
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Meyer T, Kimotho JK, Sextro W. Anforderungen an Condition-Monitoring-Verfahren
    zur Nutzung im zuverläsigkeitsgeregelten Betrieb adaptiver Systeme. In: <i>27.
    Tagung Technische Zuverlässigkeit (TTZ 2015) - Entwicklung Und Betrieb Zuverlässiger
    Produkte</i>. Leonberg; 2015:111-122.'
  apa: Meyer, T., Kimotho, J. K., &#38; Sextro, W. (2015). Anforderungen an Condition-Monitoring-Verfahren
    zur Nutzung im zuverläsigkeitsgeregelten Betrieb adaptiver Systeme. In <i>27.
    Tagung Technische Zuverlässigkeit (TTZ 2015) - Entwicklung und Betrieb zuverlässiger
    Produkte</i> (pp. 111–122). Leonberg.
  bibtex: '@inproceedings{Meyer_Kimotho_Sextro_2015, place={Leonberg}, title={Anforderungen
    an Condition-Monitoring-Verfahren zur Nutzung im zuverläsigkeitsgeregelten Betrieb
    adaptiver Systeme}, number={2260}, booktitle={27. Tagung Technische Zuverlässigkeit
    (TTZ 2015) - Entwicklung und Betrieb zuverlässiger Produkte}, author={Meyer, Tobias
    and Kimotho, James Kuria and Sextro, Walter}, year={2015}, pages={111–122} }'
  chicago: Meyer, Tobias, James Kuria Kimotho, and Walter Sextro. “Anforderungen an
    Condition-Monitoring-Verfahren Zur Nutzung Im Zuverläsigkeitsgeregelten Betrieb
    Adaptiver Systeme.” In <i>27. Tagung Technische Zuverlässigkeit (TTZ 2015) - Entwicklung
    Und Betrieb Zuverlässiger Produkte</i>, 111–22. Leonberg, 2015.
  ieee: T. Meyer, J. K. Kimotho, and W. Sextro, “Anforderungen an Condition-Monitoring-Verfahren
    zur Nutzung im zuverläsigkeitsgeregelten Betrieb adaptiver Systeme,” in <i>27.
    Tagung Technische Zuverlässigkeit (TTZ 2015) - Entwicklung und Betrieb zuverlässiger
    Produkte</i>, 2015, no. 2260, pp. 111–122.
  mla: Meyer, Tobias, et al. “Anforderungen an Condition-Monitoring-Verfahren Zur
    Nutzung Im Zuverläsigkeitsgeregelten Betrieb Adaptiver Systeme.” <i>27. Tagung
    Technische Zuverlässigkeit (TTZ 2015) - Entwicklung Und Betrieb Zuverlässiger
    Produkte</i>, no. 2260, 2015, pp. 111–22.
  short: 'T. Meyer, J.K. Kimotho, W. Sextro, in: 27. Tagung Technische Zuverlässigkeit
    (TTZ 2015) - Entwicklung Und Betrieb Zuverlässiger Produkte, Leonberg, 2015, pp.
    111–122.'
date_created: 2019-05-27T08:31:38Z
date_updated: 2019-09-30T08:09:22Z
department:
- _id: '151'
issue: '2260'
language:
- iso: eng
page: 111-122
place: Leonberg
publication: 27. Tagung Technische Zuverlässigkeit (TTZ 2015) - Entwicklung und Betrieb
  zuverlässiger Produkte
quality_controlled: '1'
status: public
title: Anforderungen an Condition-Monitoring-Verfahren zur Nutzung im zuverläsigkeitsgeregelten
  Betrieb adaptiver Systeme
type: conference
user_id: '55222'
year: '2015'
...
---
_id: '9951'
abstract:
- lang: eng
  text: Ultrasonic wire bonding is an indispensable process in the manufacturing of
    semiconductor components. It is used for interconnecting the silicon die to e.g.
    connectors in the housing or to other semiconductors in complex components. In
    high power applications, such as wind turbines, locomotives or electric vehicles,
    the thermal and mechanical limits of interconnects made from aluminum are nearing.
    The limits could be overcome using copper wire bonds, but their manufacturing
    poses challenges due to the harder material, which leads to increased wear of
    the bond tools and to less reliable production. To overcome these drawbacks, adaptation
    of process parameters at runtime is employed. However, the range of parameter
    values for which a stable process can be maintained is very small, making it necessary
    to compute suitable parameters beforehand. To this end, and to gain insights into
    the process itself, the ultrasonic bonding process is modeled. The full model
    is composed of several partial models, some of which were introduced before. This
    paper focuses on the modularization of the full model and on the interaction of
    partial models. All partial models are presented, their interaction is shown and
    the general outline of the simulation process is given.
author:
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Andreas
  full_name: Unger, Andreas
  last_name: Unger
- first_name: Simon
  full_name: Althoff, Simon
  last_name: Althoff
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Michael
  full_name: Brökelmann, Michael
  last_name: Brökelmann
- first_name: Matthias
  full_name: Hunstig, Matthias
  last_name: Hunstig
- first_name: Karsten
  full_name: Guth, Karsten
  last_name: Guth
citation:
  ama: 'Meyer T, Unger A, Althoff S, et al. Modeling and simulation of the ultrasonic
    wire bonding process. In: <i>2015 17th Electronics Packaging Technology Conference</i>.
    ; 2015. doi:<a href="https://doi.org/10.1109/EPTC.2015.7412377">10.1109/EPTC.2015.7412377</a>'
  apa: Meyer, T., Unger, A., Althoff, S., Sextro, W., Brökelmann, M., Hunstig, M.,
    &#38; Guth, K. (2015). Modeling and simulation of the ultrasonic wire bonding
    process. In <i>2015 17th Electronics Packaging Technology Conference</i>. <a href="https://doi.org/10.1109/EPTC.2015.7412377">https://doi.org/10.1109/EPTC.2015.7412377</a>
  bibtex: '@inproceedings{Meyer_Unger_Althoff_Sextro_Brökelmann_Hunstig_Guth_2015,
    title={Modeling and simulation of the ultrasonic wire bonding process}, DOI={<a
    href="https://doi.org/10.1109/EPTC.2015.7412377">10.1109/EPTC.2015.7412377</a>},
    booktitle={2015 17th Electronics Packaging Technology Conference}, author={Meyer,
    Tobias and Unger, Andreas and Althoff, Simon and Sextro, Walter and Brökelmann,
    Michael and Hunstig, Matthias and Guth, Karsten}, year={2015} }'
  chicago: Meyer, Tobias, Andreas Unger, Simon Althoff, Walter Sextro, Michael Brökelmann,
    Matthias Hunstig, and Karsten Guth. “Modeling and Simulation of the Ultrasonic
    Wire Bonding Process.” In <i>2015 17th Electronics Packaging Technology Conference</i>,
    2015. <a href="https://doi.org/10.1109/EPTC.2015.7412377">https://doi.org/10.1109/EPTC.2015.7412377</a>.
  ieee: T. Meyer <i>et al.</i>, “Modeling and simulation of the ultrasonic wire bonding
    process,” in <i>2015 17th Electronics Packaging Technology Conference</i>, 2015.
  mla: Meyer, Tobias, et al. “Modeling and Simulation of the Ultrasonic Wire Bonding
    Process.” <i>2015 17th Electronics Packaging Technology Conference</i>, 2015,
    doi:<a href="https://doi.org/10.1109/EPTC.2015.7412377">10.1109/EPTC.2015.7412377</a>.
  short: 'T. Meyer, A. Unger, S. Althoff, W. Sextro, M. Brökelmann, M. Hunstig, K.
    Guth, in: 2015 17th Electronics Packaging Technology Conference, 2015.'
date_created: 2019-05-27T08:34:21Z
date_updated: 2020-05-07T05:33:52Z
department:
- _id: '151'
doi: 10.1109/EPTC.2015.7412377
language:
- iso: eng
project:
- _id: '92'
  grant_number: 02 PQ2210
  name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: 2015 17th Electronics Packaging Technology Conference
quality_controlled: '1'
status: public
title: Modeling and simulation of the ultrasonic wire bonding process
type: conference
user_id: '210'
year: '2015'
...
---
_id: '9952'
abstract:
- lang: eng
  text: The contact between viscoelastic materials e.g. elastomers and a rough surface
    leads to a special friction characteristic, which differs greatly in its properties
    comparing to other materials like metals. In practice, this friction combination
    occurs for example in the tire-road contact, or in the use of rubber gaskets.
    Due to the frictional forces a system is significantly influenced in its vibrational
    properties. The friction force is composed of two main components adhesion and
    hysteresis. The adhesion results from molecular bounds between the contact partners,
    while the deformation of the viscoelastic material by the roughness of the counter
    body leads to power loss. This internal friction results in an additional frictional
    force, which is described by the hysteresis. To simulate the frictional behaviour
    of elastomers on rough surfaces and thus to determine the energy dissipation in
    contact, it is necessary to develop a mechanical model which considers the roughness
    of the contact partners, as well as dynamic effects and the dependence on normal
    pressure and sliding speed. The viscoelastic material behaviour must also be considered.
    The contact between two rough surfaces is modelled as a rough rigid layer contacting
    a rough elas- tic layer. The elastic layer is modelled by point masses connected
    by Maxwell-elements. This allows the viscoelastic properties of the elastomer
    to be considered. The behaviour of whole system can be described by equations
    of motion with integrated constraints. The degrees of freedom of the model depends
    on the varying contact conditions. A point mass not in contact has two degrees
    of freedom. A point mass in contact moving along the roughness path can be described
    by only one degree of freedom. For each Maxwell-Element also an inner coordinate
    and thus a further degree of freedom is needed. Because of varying contact conditions
    dur- ing the simulation, the simulation interrupts in case the contact conditions
    change. Then the equations of motions are adapted with respect to the contact
    constraints. As a result of the simulation one obtain the energy dissipation and
    thus the friction char- acteristic during the friction process. It is possible
    to use these results in three dimensional point-contact elements in order to model
    contact surfaces on lager length scales.
author:
- first_name: Frank
  full_name: Schulte, Frank
  last_name: Schulte
- first_name: Jan
  full_name: Neuhaus, Jan
  last_name: Neuhaus
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Schulte F, Neuhaus J, Sextro W. A Mechanical Model for the Dynamical Contact
    of Elastic Rough Bodies with Viscoelastic Properties. In: <i>Proceedings of ICoEV
    2015 International Conference on Engineering Vibration</i>. ; 2015:1109-1117.'
  apa: Schulte, F., Neuhaus, J., &#38; Sextro, W. (2015). A Mechanical Model for the
    Dynamical Contact of Elastic Rough Bodies with Viscoelastic Properties. In <i>Proceedings
    of ICoEV 2015 International Conference on Engineering Vibration</i> (pp. 1109–1117).
  bibtex: '@inproceedings{Schulte_Neuhaus_Sextro_2015, title={A Mechanical Model for
    the Dynamical Contact of Elastic Rough Bodies with Viscoelastic Properties}, booktitle={Proceedings
    of ICoEV 2015 International Conference on Engineering Vibration}, author={Schulte,
    Frank and Neuhaus, Jan and Sextro, Walter}, year={2015}, pages={1109–1117} }'
  chicago: Schulte, Frank, Jan Neuhaus, and Walter Sextro. “A Mechanical Model for
    the Dynamical Contact of Elastic Rough Bodies with Viscoelastic Properties.” In
    <i>Proceedings of ICoEV 2015 International Conference on Engineering Vibration</i>,
    1109–17, 2015.
  ieee: F. Schulte, J. Neuhaus, and W. Sextro, “A Mechanical Model for the Dynamical
    Contact of Elastic Rough Bodies with Viscoelastic Properties,” in <i>Proceedings
    of ICoEV 2015 International Conference on Engineering Vibration</i>, 2015, pp.
    1109–1117.
  mla: Schulte, Frank, et al. “A Mechanical Model for the Dynamical Contact of Elastic
    Rough Bodies with Viscoelastic Properties.” <i>Proceedings of ICoEV 2015 International
    Conference on Engineering Vibration</i>, 2015, pp. 1109–17.
  short: 'F. Schulte, J. Neuhaus, W. Sextro, in: Proceedings of ICoEV 2015 International
    Conference on Engineering Vibration, 2015, pp. 1109–1117.'
date_created: 2019-05-27T08:37:22Z
date_updated: 2019-09-16T10:47:53Z
department:
- _id: '151'
keyword:
- Contact Mechanics
- Viscoelastic Material
- Adhesive Friction
- Hysteresis Friction
- Energy Dissipation
- Vibration
language:
- iso: eng
page: 1109-1117
publication: Proceedings of ICoEV 2015 International Conference on Engineering Vibration
quality_controlled: '1'
status: public
title: A Mechanical Model for the Dynamical Contact of Elastic Rough Bodies with Viscoelastic
  Properties
type: conference
user_id: '55222'
year: '2015'
...
---
_id: '9954'
abstract:
- lang: eng
  text: To increase quality and reliability of copper wire bonds, self-optimization
    is a promising technique. For the implementation of self-optimization for ultrasonic
    heavy copper wire bonding machines, a model of stick-slip motion between tool
    and wire and between wire and substrate during the bonding process is essential.
    Investigations confirm that both of these contacts do indeed show stick-slip movement
    in each period oscillation. In a first step, this paper shows the importance of
    modeling the stick-slip effect by determining, monitoring and analyzing amplitudes
    and phase angles of tool tip, wire and substrate experimentally during bonding
    via laser measurements. In a second step, the paper presents a dynamic model which
    has been parameterized using an iterative numerical parameter identification method.
    This model includes Archard's wear approach in order to compute the lost volume
    of tool tip due to wear over the entire process time. A validation of the model
    by comparing measured and calculated amplitudes of tool tip and wire reveals high
    model quality. Then it is then possible to calculate the lifetime of the tool
    for different process parameters, i.e. values of normal force and ultrasonic voltage.
author:
- first_name: Andreas
  full_name: Unger, Andreas
  last_name: Unger
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Paul
  full_name: Eichwald, Paul
  last_name: Eichwald
- first_name: Simon
  full_name: Althoff, Simon
  last_name: Althoff
- first_name: Florian
  full_name: Eacock, Florian
  last_name: Eacock
- first_name: Michael
  full_name: Brökelmann, Michael
  last_name: Brökelmann
citation:
  ama: 'Unger A, Sextro W, Meyer T, et al. Modeling of the Stick-Slip Effect in Heavy
    Copper Wire Bonding to Determine and Reduce Tool Wear. In: <i>2015 17th Electronics
    Packaging Technology Conference</i>. ; 2015. doi:<a href="https://doi.org/10.1109/EPTC.2015.7412375">10.1109/EPTC.2015.7412375</a>'
  apa: Unger, A., Sextro, W., Meyer, T., Eichwald, P., Althoff, S., Eacock, F., &#38;
    Brökelmann, M. (2015). Modeling of the Stick-Slip Effect in Heavy Copper Wire
    Bonding to Determine and Reduce Tool Wear. In <i>2015 17th Electronics Packaging
    Technology Conference</i>. <a href="https://doi.org/10.1109/EPTC.2015.7412375">https://doi.org/10.1109/EPTC.2015.7412375</a>
  bibtex: '@inproceedings{Unger_Sextro_Meyer_Eichwald_Althoff_Eacock_Brökelmann_2015,
    title={Modeling of the Stick-Slip Effect in Heavy Copper Wire Bonding to Determine
    and Reduce Tool Wear}, DOI={<a href="https://doi.org/10.1109/EPTC.2015.7412375">10.1109/EPTC.2015.7412375</a>},
    booktitle={2015 17th Electronics Packaging Technology Conference}, author={Unger,
    Andreas and Sextro, Walter and Meyer, Tobias and Eichwald, Paul and Althoff, Simon
    and Eacock, Florian and Brökelmann, Michael}, year={2015} }'
  chicago: Unger, Andreas, Walter Sextro, Tobias Meyer, Paul Eichwald, Simon Althoff,
    Florian Eacock, and Michael Brökelmann. “Modeling of the Stick-Slip Effect in
    Heavy Copper Wire Bonding to Determine and Reduce Tool Wear.” In <i>2015 17th
    Electronics Packaging Technology Conference</i>, 2015. <a href="https://doi.org/10.1109/EPTC.2015.7412375">https://doi.org/10.1109/EPTC.2015.7412375</a>.
  ieee: A. Unger <i>et al.</i>, “Modeling of the Stick-Slip Effect in Heavy Copper
    Wire Bonding to Determine and Reduce Tool Wear,” in <i>2015 17th Electronics Packaging
    Technology Conference</i>, 2015.
  mla: Unger, Andreas, et al. “Modeling of the Stick-Slip Effect in Heavy Copper Wire
    Bonding to Determine and Reduce Tool Wear.” <i>2015 17th Electronics Packaging
    Technology Conference</i>, 2015, doi:<a href="https://doi.org/10.1109/EPTC.2015.7412375">10.1109/EPTC.2015.7412375</a>.
  short: 'A. Unger, W. Sextro, T. Meyer, P. Eichwald, S. Althoff, F. Eacock, M. Brökelmann,
    in: 2015 17th Electronics Packaging Technology Conference, 2015.'
date_created: 2019-05-27T08:43:55Z
date_updated: 2020-05-07T05:33:52Z
department:
- _id: '151'
doi: 10.1109/EPTC.2015.7412375
language:
- iso: eng
project:
- _id: '92'
  grant_number: 02 PQ2210
  name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: 2015 17th Electronics Packaging Technology Conference
quality_controlled: '1'
status: public
title: Modeling of the Stick-Slip Effect in Heavy Copper Wire Bonding to Determine
  and Reduce Tool Wear
type: conference
user_id: '210'
year: '2015'
...
---
_id: '25168'
author:
- first_name: Jürgen
  full_name: Gausemeier, Jürgen
  last_name: Gausemeier
- first_name: Franz-Josef
  full_name: Rammig, Franz-Josef
  last_name: Rammig
- first_name: Wilhelm
  full_name: Schäfer, Wilhelm
  last_name: Schäfer
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Gausemeier J, Rammig F-J, Schäfer W, Sextro W. <i>Dependability of Self-Optimizing
    Mechatronic Systems</i>. Springer-Verlag; 2014.
  apa: Gausemeier, J., Rammig, F.-J., Schäfer, W., &#38; Sextro, W. (2014). <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>. Springer-Verlag.
  bibtex: '@book{Gausemeier_Rammig_Schäfer_Sextro_2014, place={ Heidelberg, Germany},
    title={Dependability of Self-Optimizing Mechatronic Systems}, publisher={Springer-Verlag},
    author={Gausemeier, Jürgen and Rammig, Franz-Josef and Schäfer, Wilhelm and Sextro,
    Walter}, year={2014} }'
  chicago: 'Gausemeier, Jürgen, Franz-Josef Rammig, Wilhelm Schäfer, and Walter Sextro.
    <i>Dependability of Self-Optimizing Mechatronic Systems</i>.  Heidelberg, Germany:
    Springer-Verlag, 2014.'
  ieee: 'J. Gausemeier, F.-J. Rammig, W. Schäfer, and W. Sextro, <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>.  Heidelberg, Germany: Springer-Verlag,
    2014.'
  mla: Gausemeier, Jürgen, et al. <i>Dependability of Self-Optimizing Mechatronic
    Systems</i>. Springer-Verlag, 2014.
  short: J. Gausemeier, F.-J. Rammig, W. Schäfer, W. Sextro, Dependability of Self-Optimizing
    Mechatronic Systems, Springer-Verlag,  Heidelberg, Germany, 2014.
date_created: 2021-09-30T10:57:30Z
date_updated: 2022-01-06T06:56:53Z
department:
- _id: '672'
language:
- iso: eng
place: ' Heidelberg, Germany'
publisher: Springer-Verlag
status: public
title: Dependability of Self-Optimizing Mechatronic Systems
type: book
user_id: '21240'
year: '2014'
...
---
_id: '25173'
author:
- first_name: Michael
  full_name: Dellnitz, Michael
  last_name: Dellnitz
- first_name: Kathrin
  full_name: Flaßkamp, Kathrin
  last_name: Flaßkamp
- first_name: Philip
  full_name: Hartmann, Philip
  last_name: Hartmann
- first_name: Martin
  full_name: Krüger, Martin
  last_name: Krüger
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Claudia
  full_name: Priesterjahn, Claudia
  last_name: Priesterjahn
- first_name: Sina
  full_name: Ober-Blöbaum, Sina
  id: '16494'
  last_name: Ober-Blöbaum
- first_name: Christoph
  full_name: Rasche, Christoph
  last_name: Rasche
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Katharina
  full_name: Stahl, Katharina
  last_name: Stahl
- first_name: Ansgar
  full_name: Trächtler, Ansgar
  id: '552'
  last_name: Trächtler
citation:
  ama: 'Dellnitz M, Flaßkamp K, Hartmann P, et al. Self-optimizing Mechatronic Systems.
    In: <i>Dependability of Self-Optimizing Mechatronic Systems, Kapitel: 1.1</i>.
    Springer-Verlag; 2014:3-12.'
  apa: 'Dellnitz, M., Flaßkamp, K., Hartmann, P., Krüger, M., Meyer, T., Priesterjahn,
    C., Ober-Blöbaum, S., Rasche, C., Sextro, W., Stahl, K., &#38; Trächtler, A. (2014).
    Self-optimizing Mechatronic Systems. In <i>Dependability of Self-optimizing Mechatronic
    Systems, Kapitel: 1.1</i> (pp. 3–12). Springer-Verlag.'
  bibtex: '@inbook{Dellnitz_Flaßkamp_Hartmann_Krüger_Meyer_Priesterjahn_Ober-Blöbaum_Rasche_Sextro_Stahl_et
    al._2014, place={Heidelberg, Germany}, title={Self-optimizing Mechatronic Systems},
    booktitle={Dependability of Self-optimizing Mechatronic Systems, Kapitel: 1.1},
    publisher={Springer-Verlag}, author={Dellnitz, Michael and Flaßkamp, Kathrin and
    Hartmann, Philip and Krüger, Martin and Meyer, Tobias and Priesterjahn, Claudia
    and Ober-Blöbaum, Sina and Rasche, Christoph and Sextro, Walter and Stahl, Katharina
    and et al.}, year={2014}, pages={3–12} }'
  chicago: 'Dellnitz, Michael, Kathrin Flaßkamp, Philip Hartmann, Martin Krüger, Tobias
    Meyer, Claudia Priesterjahn, Sina Ober-Blöbaum, et al. “Self-Optimizing Mechatronic
    Systems.” In <i>Dependability of Self-Optimizing Mechatronic Systems, Kapitel:
    1.1</i>, 3–12. Heidelberg, Germany: Springer-Verlag, 2014.'
  ieee: 'M. Dellnitz <i>et al.</i>, “Self-optimizing Mechatronic Systems,” in <i>Dependability
    of Self-optimizing Mechatronic Systems, Kapitel: 1.1</i>, Heidelberg, Germany:
    Springer-Verlag, 2014, pp. 3–12.'
  mla: 'Dellnitz, Michael, et al. “Self-Optimizing Mechatronic Systems.” <i>Dependability
    of Self-Optimizing Mechatronic Systems, Kapitel: 1.1</i>, Springer-Verlag, 2014,
    pp. 3–12.'
  short: 'M. Dellnitz, K. Flaßkamp, P. Hartmann, M. Krüger, T. Meyer, C. Priesterjahn,
    S. Ober-Blöbaum, C. Rasche, W. Sextro, K. Stahl, A. Trächtler, in: Dependability
    of Self-Optimizing Mechatronic Systems, Kapitel: 1.1, Springer-Verlag, Heidelberg,
    Germany, 2014, pp. 3–12.'
date_created: 2021-09-30T12:17:07Z
date_updated: 2022-01-06T06:56:53Z
department:
- _id: '672'
language:
- iso: eng
page: 3-12
place: Heidelberg, Germany
publication: 'Dependability of Self-optimizing Mechatronic Systems, Kapitel: 1.1'
publisher: Springer-Verlag
status: public
title: Self-optimizing Mechatronic Systems
type: book_chapter
user_id: '21240'
year: '2014'
...
---
_id: '28394'
author:
- first_name: 'Rafal '
  full_name: 'Dorociak, Rafal '
  last_name: Dorociak
- first_name: J{\"u}rgen
  full_name: Gausemeier, J{\"u}rgen
  last_name: Gausemeier
- first_name: Peter
  full_name: Iwanek, Peter
  last_name: Iwanek
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Christoph
  full_name: Sondermann-W{\"o}lke, Christoph
  last_name: Sondermann-W{\"o}lke
citation:
  ama: 'Dorociak R, Gausemeier J, Iwanek P, Meyer T, Sextro W, Sondermann-W{\"o}lke
    C. Development of the Active Guidance Module. In: <i>Dependability of Self-Optimizing
    Mechatronic Systems</i>. AACE Press; 2014:178-182.'
  apa: Dorociak, R., Gausemeier, J., Iwanek, P., Meyer, T., Sextro, W., &#38; Sondermann-W{\"o}lke,
    C. (2014). Development of the Active Guidance Module. In <i>Dependability of Self-optimizing
    Mechatronic Systems</i> (pp. 178–182). AACE Press.
  bibtex: '@inbook{Dorociak_Gausemeier_Iwanek_Meyer_Sextro_Sondermann-W{\"o}lke_2014,
    title={Development of the Active Guidance Module}, booktitle={Dependability of
    Self-optimizing Mechatronic Systems}, publisher={AACE Press}, author={Dorociak,
    Rafal  and Gausemeier, J{\"u}rgen and Iwanek, Peter and Meyer, Tobias and Sextro,
    Walter and Sondermann-W{\"o}lke, Christoph}, year={2014}, pages={178–182} }'
  chicago: Dorociak, Rafal , J{\"u}rgen Gausemeier, Peter Iwanek, Tobias Meyer, Walter
    Sextro, and Christoph Sondermann-W{\"o}lke. “Development of the Active Guidance
    Module.” In <i>Dependability of Self-Optimizing Mechatronic Systems</i>, 178–82.
    AACE Press, 2014.
  ieee: R. Dorociak, J. Gausemeier, P. Iwanek, T. Meyer, W. Sextro, and C. Sondermann-W{\"o}lke,
    “Development of the Active Guidance Module,” in <i>Dependability of Self-optimizing
    Mechatronic Systems</i>, AACE Press, 2014, pp. 178–182.
  mla: Dorociak, Rafal, et al. “Development of the Active Guidance Module.” <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>, AACE Press, 2014, pp. 178–82.
  short: 'R. Dorociak, J. Gausemeier, P. Iwanek, T. Meyer, W. Sextro, C. Sondermann-W{\"o}lke,
    in: Dependability of Self-Optimizing Mechatronic Systems, AACE Press, 2014, pp.
    178–182.'
date_created: 2021-12-07T19:19:41Z
date_updated: 2022-01-06T06:58:02Z
department:
- _id: '676'
language:
- iso: eng
page: 178-182
publication: Dependability of Self-optimizing Mechatronic Systems
publication_status: published
publisher: AACE Press
status: public
title: Development of the Active Guidance Module
type: book_chapter
user_id: '71124'
year: '2014'
...
---
_id: '28396'
author:
- first_name: J{\"u}rgen
  full_name: Gausemeier, J{\"u}rgen
  last_name: Gausemeier
- first_name: Franz-Josef
  full_name: Rammig, Franz-Josef
  last_name: Rammig
- first_name: ' Wilhelm'
  full_name: Sch{\"a}fer,  Wilhelm
  last_name: Sch{\"a}fer
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Gausemeier J, Rammig F-J, Sch{\"a}fer  Wilhelm, Sextro W. <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>. Springer-Verlag, Heidelberg, Germany;
    2014.
  apa: Gausemeier, J., Rammig, F.-J., Sch{\"a}fer,  Wilhelm, &#38; Sextro, W. (2014).
    <i>Dependability of Self-Optimizing Mechatronic Systems</i>. Springer-Verlag,
    Heidelberg, Germany.
  bibtex: '@book{Gausemeier_Rammig_Sch{\"a}fer_Sextro_2014, title={Dependability of
    Self-Optimizing Mechatronic Systems}, publisher={Springer-Verlag, Heidelberg,
    Germany}, author={Gausemeier, J{\"u}rgen and Rammig, Franz-Josef and Sch{\"a}fer,  Wilhelm
    and Sextro, Walter}, year={2014} }'
  chicago: Gausemeier, J{\"u}rgen, Franz-Josef Rammig,  Wilhelm Sch{\"a}fer, and Walter
    Sextro. <i>Dependability of Self-Optimizing Mechatronic Systems</i>. Springer-Verlag,
    Heidelberg, Germany, 2014.
  ieee: J. Gausemeier, F.-J. Rammig,  Wilhelm Sch{\"a}fer, and W. Sextro, <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>. Springer-Verlag, Heidelberg, Germany,
    2014.
  mla: Gausemeier, J{\"u}rgen, et al. <i>Dependability of Self-Optimizing Mechatronic
    Systems</i>. Springer-Verlag, Heidelberg, Germany, 2014.
  short: J. Gausemeier, F.-J. Rammig,  Wilhelm Sch{\"a}fer, W. Sextro, Dependability
    of Self-Optimizing Mechatronic Systems, Springer-Verlag, Heidelberg, Germany,
    2014.
date_created: 2021-12-07T19:28:28Z
date_updated: 2022-01-06T06:58:02Z
department:
- _id: '676'
language:
- iso: eng
publication_status: published
publisher: Springer-Verlag, Heidelberg, Germany
status: public
title: Dependability of Self-Optimizing Mechatronic Systems
type: book
user_id: '71124'
year: '2014'
...
---
_id: '28399'
author:
- first_name: Rafal
  full_name: Dorociak, Rafal
  last_name: Dorociak
- first_name: ' J{\"u}rgen'
  full_name: Gausemeier,  J{\"u}rgen
  last_name: Gausemeier
- first_name: ' Peter'
  full_name: Iwanek,  Peter
  last_name: Iwanek
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Dorociak R, Gausemeier  J{\"u}rgen, Iwanek  Peter, Meyer T, Sextro W. Selecting
    Suitable Methods Using the Methodology. In: <i>Dependability of Self-Optimizing
    Mechatronic Systems</i>. Springer-Verlag Berlin Heidelberg; 2014:174-178.'
  apa: Dorociak, R., Gausemeier,  J{\"u}rgen, Iwanek,  Peter, Meyer, T., &#38; Sextro,
    W. (2014). Selecting Suitable Methods Using the Methodology. In <i>Dependability
    of Self-optimizing Mechatronic Systems</i> (pp. 174–178). Springer-Verlag Berlin
    Heidelberg.
  bibtex: '@inbook{Dorociak_Gausemeier_Iwanek_Meyer_Sextro_2014, title={Selecting
    Suitable Methods Using the Methodology}, booktitle={Dependability of Self-optimizing
    Mechatronic Systems}, publisher={Springer-Verlag Berlin Heidelberg}, author={Dorociak,
    Rafal and Gausemeier,  J{\"u}rgen and Iwanek,  Peter and Meyer, Tobias and Sextro,
    Walter}, year={2014}, pages={174–178} }'
  chicago: Dorociak, Rafal,  J{\"u}rgen Gausemeier,  Peter Iwanek, Tobias Meyer, and
    Walter Sextro. “Selecting Suitable Methods Using the Methodology.” In <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>, 174–78. Springer-Verlag Berlin Heidelberg,
    2014.
  ieee: R. Dorociak,  J{\"u}rgen Gausemeier,  Peter Iwanek, T. Meyer, and W. Sextro,
    “Selecting Suitable Methods Using the Methodology,” in <i>Dependability of Self-optimizing
    Mechatronic Systems</i>, Springer-Verlag Berlin Heidelberg, 2014, pp. 174–178.
  mla: Dorociak, Rafal, et al. “Selecting Suitable Methods Using the Methodology.”
    <i>Dependability of Self-Optimizing Mechatronic Systems</i>, Springer-Verlag Berlin
    Heidelberg, 2014, pp. 174–78.
  short: 'R. Dorociak,  J{\"u}rgen Gausemeier,  Peter Iwanek, T. Meyer, W. Sextro,
    in: Dependability of Self-Optimizing Mechatronic Systems, Springer-Verlag Berlin
    Heidelberg, 2014, pp. 174–178.'
date_created: 2021-12-07T19:50:25Z
date_updated: 2022-01-06T06:58:02Z
department:
- _id: '676'
language:
- iso: eng
page: 174-178
publication: Dependability of Self-optimizing Mechatronic Systems
publication_status: published
publisher: Springer-Verlag Berlin Heidelberg
status: public
title: Selecting Suitable Methods Using the Methodology
type: book_chapter
user_id: '71124'
year: '2014'
...
---
_id: '28400'
author:
- first_name: Rafal
  full_name: Dorociak, Rafal
  last_name: Dorociak
- first_name: 'J{\"u}rgen '
  full_name: 'Gausemeier, J{\"u}rgen '
  last_name: Gausemeier
- first_name: Peter
  full_name: Iwanek, Peter
  last_name: Iwanek
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Dorociak R, Gausemeier J, Iwanek P, Meyer T, Sextro W. Selecting Suitable
    Methods Using the Methodology. In: <i>Dependability of Self-Optimizing Mechatronic
    Systems</i>. Springer-Verlag Berlin Heidelberg; 2014:174-178.'
  apa: Dorociak, R., Gausemeier, J., Iwanek, P., Meyer, T., &#38; Sextro, W. (2014).
    Selecting Suitable Methods Using the Methodology. In <i>Dependability of Self-optimizing
    Mechatronic Systems</i> (pp. 174–178). Springer-Verlag Berlin Heidelberg.
  bibtex: '@inbook{Dorociak_Gausemeier_Iwanek_Meyer_Sextro_2014, title={Selecting
    Suitable Methods Using the Methodology}, booktitle={Dependability of Self-optimizing
    Mechatronic Systems}, publisher={Springer-Verlag Berlin Heidelberg}, author={Dorociak,
    Rafal and Gausemeier, J{\"u}rgen  and Iwanek, Peter and Meyer, Tobias and Sextro,
    Walter}, year={2014}, pages={174–178} }'
  chicago: Dorociak, Rafal, J{\"u}rgen  Gausemeier, Peter Iwanek, Tobias Meyer, and
    Walter Sextro. “Selecting Suitable Methods Using the Methodology.” In <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>, 174–78. Springer-Verlag Berlin Heidelberg,
    2014.
  ieee: R. Dorociak, J. Gausemeier, P. Iwanek, T. Meyer, and W. Sextro, “Selecting
    Suitable Methods Using the Methodology,” in <i>Dependability of Self-optimizing
    Mechatronic Systems</i>, Springer-Verlag Berlin Heidelberg, 2014, pp. 174–178.
  mla: Dorociak, Rafal, et al. “Selecting Suitable Methods Using the Methodology.”
    <i>Dependability of Self-Optimizing Mechatronic Systems</i>, Springer-Verlag Berlin
    Heidelberg, 2014, pp. 174–78.
  short: 'R. Dorociak, J. Gausemeier, P. Iwanek, T. Meyer, W. Sextro, in: Dependability
    of Self-Optimizing Mechatronic Systems, Springer-Verlag Berlin Heidelberg, 2014,
    pp. 174–178.'
date_created: 2021-12-07T19:54:27Z
date_updated: 2022-01-06T06:58:03Z
department:
- _id: '676'
language:
- iso: eng
page: 174-178
publication: Dependability of Self-optimizing Mechatronic Systems
publication_status: published
publisher: Springer-Verlag Berlin Heidelberg
status: public
title: Selecting Suitable Methods Using the Methodology
type: book_chapter
user_id: '71124'
year: '2014'
...
---
_id: '28410'
author:
- first_name: 'Peter '
  full_name: 'Iwanek, Peter '
  last_name: Iwanek
- first_name: Tobias
  full_name: ' Meyer, Tobias'
  last_name: ' Meyer'
- first_name: Claudia
  full_name: Priesterjahn, Claudia
  last_name: Priesterjahn
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Mareen
  full_name: Va{\ss}holz, Mareen
  last_name: Va{\ss}holz
citation:
  ama: 'Iwanek P,  Meyer T, Priesterjahn C, Sextro W, Va{\ss}holz M. Challenges. In:
    <i>Dependability of Self-Optimizing Mechatronic Systems</i>. Springer-Verlag,
    Heidelberg, Germany; 2014:12-15.'
  apa: Iwanek, P.,  Meyer, T., Priesterjahn, C., Sextro, W., &#38; Va{\ss}holz, M.
    (2014). Challenges. In <i>Dependability of Self-optimizing Mechatronic Systems</i>
    (pp. 12–15). Springer-Verlag, Heidelberg, Germany.
  bibtex: '@inbook{Iwanek_ Meyer_Priesterjahn_Sextro_Va{\ss}holz_2014, title={Challenges},
    booktitle={Dependability of Self-optimizing Mechatronic Systems}, publisher={Springer-Verlag,
    Heidelberg, Germany}, author={Iwanek, Peter  and  Meyer, Tobias and Priesterjahn,
    Claudia and Sextro, Walter and Va{\ss}holz, Mareen}, year={2014}, pages={12–15}
    }'
  chicago: Iwanek, Peter , Tobias  Meyer, Claudia Priesterjahn, Walter Sextro, and
    Mareen Va{\ss}holz. “Challenges.” In <i>Dependability of Self-Optimizing Mechatronic
    Systems</i>, 12–15. Springer-Verlag, Heidelberg, Germany, 2014.
  ieee: P. Iwanek, T.  Meyer, C. Priesterjahn, W. Sextro, and M. Va{\ss}holz, “Challenges,”
    in <i>Dependability of Self-optimizing Mechatronic Systems</i>, Springer-Verlag,
    Heidelberg, Germany, 2014, pp. 12–15.
  mla: Iwanek, Peter, et al. “Challenges.” <i>Dependability of Self-Optimizing Mechatronic
    Systems</i>, Springer-Verlag, Heidelberg, Germany, 2014, pp. 12–15.
  short: 'P. Iwanek, T.  Meyer, C. Priesterjahn, W. Sextro, M. Va{\ss}holz, in: Dependability
    of Self-Optimizing Mechatronic Systems, Springer-Verlag, Heidelberg, Germany,
    2014, pp. 12–15.'
date_created: 2021-12-07T21:22:10Z
date_updated: 2022-01-06T06:58:03Z
department:
- _id: '676'
language:
- iso: eng
page: 12-15
publication: Dependability of Self-optimizing Mechatronic Systems
publication_status: published
publisher: Springer-Verlag, Heidelberg, Germany
status: public
title: Challenges
type: book_chapter
user_id: '71124'
year: '2014'
...
---
_id: '9868'
abstract:
- lang: eng
  text: In order to increase mechanical strength, heat dissipation and ampacity and
    to decrease failure through fatigue fracture, wedge copper wire bonding is being
    introduced as a standard interconnection method for mass production. To achieve
    the same process stability when using copper wire instead of aluminum wire a profound
    understanding of the bonding process is needed. Due to the higher hardness of
    copper compared to aluminum wire it is more difficult to approach the surfaces
    of wire and substrate to a level where van der Waals forces are able to arise
    between atoms. Also, enough friction energy referred to the total contact area
    has to be generated to activate the surfaces. Therefore, a friction model is used
    to simulate the joining process. This model calculates the resulting energy of
    partial areas in the contact surface and provides information about the adhesion
    process of each area. The focus here is on the arising of micro joints in the
    contact area depending on the location in the contact and time. To validate the
    model, different touchdown forces are used to vary the initial contact areas of
    wire and substrate. Additionally, a piezoelectric tri-axial force sensor is built
    up to identify the known phases of pre-deforming, cleaning, adhering and diffusing
    for the real bonding process to map with the model. Test substrates as DBC and
    copper plate are used to show the different formations of a wedge bond connection
    due to hardness and reaction propensity. The experiments were done by using 500
    $\mu$m copper wire and a standard V-groove tool.
author:
- first_name: Simon
  full_name: Althoff, Simon
  last_name: Althoff
- first_name: Jan
  full_name: Neuhaus, Jan
  last_name: Neuhaus
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Althoff S, Neuhaus J, Hemsel T, Sextro W. Improving the bond quality of copper
    wire bonds using a friction model approach. In: <i>Electronic Components and Technology
    Conference (ECTC), 2014 IEEE 64th</i>. ; 2014:1549-1555. doi:<a href="https://doi.org/10.1109/ECTC.2014.6897500">10.1109/ECTC.2014.6897500</a>'
  apa: Althoff, S., Neuhaus, J., Hemsel, T., &#38; Sextro, W. (2014). Improving the
    bond quality of copper wire bonds using a friction model approach. In <i>Electronic
    Components and Technology Conference (ECTC), 2014 IEEE 64th</i> (pp. 1549–1555).
    <a href="https://doi.org/10.1109/ECTC.2014.6897500">https://doi.org/10.1109/ECTC.2014.6897500</a>
  bibtex: '@inproceedings{Althoff_Neuhaus_Hemsel_Sextro_2014, title={Improving the
    bond quality of copper wire bonds using a friction model approach}, DOI={<a href="https://doi.org/10.1109/ECTC.2014.6897500">10.1109/ECTC.2014.6897500</a>},
    booktitle={Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th},
    author={Althoff, Simon and Neuhaus, Jan and Hemsel, Tobias and Sextro, Walter},
    year={2014}, pages={1549–1555} }'
  chicago: Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “Improving
    the Bond Quality of Copper Wire Bonds Using a Friction Model Approach.” In <i>Electronic
    Components and Technology Conference (ECTC), 2014 IEEE 64th</i>, 1549–55, 2014.
    <a href="https://doi.org/10.1109/ECTC.2014.6897500">https://doi.org/10.1109/ECTC.2014.6897500</a>.
  ieee: S. Althoff, J. Neuhaus, T. Hemsel, and W. Sextro, “Improving the bond quality
    of copper wire bonds using a friction model approach,” in <i>Electronic Components
    and Technology Conference (ECTC), 2014 IEEE 64th</i>, 2014, pp. 1549–1555.
  mla: Althoff, Simon, et al. “Improving the Bond Quality of Copper Wire Bonds Using
    a Friction Model Approach.” <i>Electronic Components and Technology Conference
    (ECTC), 2014 IEEE 64th</i>, 2014, pp. 1549–55, doi:<a href="https://doi.org/10.1109/ECTC.2014.6897500">10.1109/ECTC.2014.6897500</a>.
  short: 'S. Althoff, J. Neuhaus, T. Hemsel, W. Sextro, in: Electronic Components
    and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.'
date_created: 2019-05-20T12:11:44Z
date_updated: 2019-09-16T10:57:58Z
department:
- _id: '151'
doi: 10.1109/ECTC.2014.6897500
keyword:
- adhesion
- circuit reliability
- deformation
- diffusion
- fatigue cracks
- friction
- interconnections
- lead bonding
- van der Waals forces
- Cu
- adhering process
- adhesion process
- ampacity improvement
- bond quality improvement
- cleaning process
- diffusing process
- fatigue fracture failure
- friction energy
- friction model
- heat dissipation
- mechanical strength
- piezoelectric triaxial force sensor
- predeforming process
- size 500 mum
- total contact area
- van der Waals forces
- wedge copper wire bonding
- Bonding
- Copper
- Finite element analysis
- Force
- Friction
- Substrates
- Wires
language:
- iso: eng
page: 1549-1555
publication: Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th
quality_controlled: '1'
status: public
title: Improving the bond quality of copper wire bonds using a friction model approach
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9869'
abstract:
- lang: eng
  text: Cavitation monitoring is desired to optimize the sonication for diverse sonochemical
    processes and to detect changes or malfunctions during operation. In situ cavitation
    measurements can be carried out by detection of the acoustic emissions of cavitation
    bubbles by sensors in the liquid. However, in harsh environments sensors might
    not be applicable. Thus, the impact of cavitation on the electrical signals of
    a piezoelectric transducer has been analyzed as alternative method to measure
    the threshold, strength and type of cavitation. The applicability has been tested
    in three different setups to evaluate the general- izability of extracted indicators.
    In all setups indicators for the cavitation thresholds could be derived from the
    current signal. In two setups features showed two thresholds that may be linked
    to the types of cavitation. However, only one feature derived from the current
    signal in one particular setup correlated to the strength of cavitation. Cavitation
    detection based on the current signal of the transducer is a useful method to
    detect cavitation in harsh environments and without perturbing the sound field.
    Once appli- cable indicators have been identified, they may easily be tracked
    during the process. However, for more detailed studies about the cavitation activity
    and its spatial distribution, measurements with in situ sensors are recommended.
author:
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Gianluca
  full_name: Memoli, Gianluca
  last_name: Memoli
- first_name: Mark
  full_name: Hodnett, Mark
  last_name: Hodnett
- first_name: Bajram
  full_name: Zeqiri, Bajram
  last_name: Zeqiri
citation:
  ama: 'Bornmann P, Hemsel T, Sextro W, Memoli G, Hodnett M, Zeqiri B. Self-Sensing
    Ultrasound Transducer for Cavitation Detection. In: <i>2014 IEEE International
    Ultrasonics Symposium Proceedings</i>. ; 2014:663-666. doi:<a href="https://doi.org/10.1109/ULTSYM.2014.0163">10.1109/ULTSYM.2014.0163</a>'
  apa: Bornmann, P., Hemsel, T., Sextro, W., Memoli, G., Hodnett, M., &#38; Zeqiri,
    B. (2014). Self-Sensing Ultrasound Transducer for Cavitation Detection. In <i>2014
    IEEE International Ultrasonics Symposium Proceedings</i> (pp. 663–666). <a href="https://doi.org/10.1109/ULTSYM.2014.0163">https://doi.org/10.1109/ULTSYM.2014.0163</a>
  bibtex: '@inproceedings{Bornmann_Hemsel_Sextro_Memoli_Hodnett_Zeqiri_2014, title={Self-Sensing
    Ultrasound Transducer for Cavitation Detection}, DOI={<a href="https://doi.org/10.1109/ULTSYM.2014.0163">10.1109/ULTSYM.2014.0163</a>},
    booktitle={2014 IEEE International Ultrasonics Symposium Proceedings}, author={Bornmann,
    Peter and Hemsel, Tobias and Sextro, Walter and Memoli, Gianluca and Hodnett,
    Mark and Zeqiri, Bajram}, year={2014}, pages={663–666} }'
  chicago: Bornmann, Peter, Tobias Hemsel, Walter Sextro, Gianluca Memoli, Mark Hodnett,
    and Bajram Zeqiri. “Self-Sensing Ultrasound Transducer for Cavitation Detection.”
    In <i>2014 IEEE International Ultrasonics Symposium Proceedings</i>, 663–66, 2014.
    <a href="https://doi.org/10.1109/ULTSYM.2014.0163">https://doi.org/10.1109/ULTSYM.2014.0163</a>.
  ieee: P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, and B. Zeqiri, “Self-Sensing
    Ultrasound Transducer for Cavitation Detection,” in <i>2014 IEEE International
    Ultrasonics Symposium Proceedings</i>, 2014, pp. 663–666.
  mla: Bornmann, Peter, et al. “Self-Sensing Ultrasound Transducer for Cavitation
    Detection.” <i>2014 IEEE International Ultrasonics Symposium Proceedings</i>,
    2014, pp. 663–66, doi:<a href="https://doi.org/10.1109/ULTSYM.2014.0163">10.1109/ULTSYM.2014.0163</a>.
  short: 'P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, B. Zeqiri, in:
    2014 IEEE International Ultrasonics Symposium Proceedings, 2014, pp. 663–666.'
date_created: 2019-05-20T12:13:02Z
date_updated: 2019-05-20T12:13:41Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2014.0163
language:
- iso: eng
page: 663-666
publication: 2014 IEEE International Ultrasonics Symposium Proceedings
publication_identifier:
  isbn:
  - '9781479970490'
status: public
title: Self-Sensing Ultrasound Transducer for Cavitation Detection
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9871'
abstract:
- lang: eng
  text: 'Wire bonding is the most common technology for connecting electronic components.
    Due to their efficiency bond interconnections made of copper wire are used for
    example in the aerospace and medical technology as well as in the fields of renewable
    energies. One of the main cost factors in the manufacturing process is the consumables
    like bonding tools. The technological transition to copper as wire material causes
    significant wear on the millimeter large effective contact area of the bonding
    tool. This wear leads to a loss by a factor of 30 of the number of reliable interconnections
    which can be produced by a single tool. To reduce setting-up time in the production
    and minimizing costs, an enlarged bonding tool lifetime is desirable. Consequently
    a better understanding of wear and recognition of wear pattern is required. Therefore,
    the paper presents an analyzing method of the tool topography change of a heavy
    wire bonding tool by using a confocal microscope. Furthermore, the paper discusses
    the identification of the main wear indicators by the help of the named topography
    change for different bond parameters, like ultrasonic power and tool geometry.
    Reference topography has been carried out by choosing typical parameters of the
    production line. To judge whether the quality requirement of the bond connections
    made by a single tool cannot be fulfilled shear test of the source bond have been
    carried out after a defined number of produced bond connections. Main steps of
    analysis: (I)Topography of the tool surface is sampled after a defined number
    of bonds by means of a confocal microscope to detect the wear progress.(II)The
    recorded data is filtered using Matlab. So, measurement errors can be eliminated
    and the topography can be overlaid more easy to identify differences between diverse
    tools or differences in wear stages of the same tool.(III)The subsequent discretization
    of the topography into sub volumes allows to (IV)describe the loss of volume depending
    on the position in the groove. Thereby, intermediate status of wear of one tool
    can be used to obtain a persistent description of the topography change over the
    number of produced bonds by interpolating the confocal data. Afterwards the persistent
    change of the groove flank has been analyzed for the named test series to identify
    the main wear indicators and their effect on shear forces. All worn tools show
    dominant areas for volume loss especially for plastic deformation and accordingly
    abrasion. These wear mechanism can be referred to the change of main parts of
    the groove geometry like the rounding of the front and back radius. The most volume
    loss was identified in the upper part of the tool flanks or rather at the transition
    from the groove flank to the front or back radius. Furthermore the observation
    of the center of the groove flank shows just a little change in volume. All in
    all, the identification of the wear indicators will be discussed with the objective
    of increasing the tool lifetime by optimizing the tool geometry without losses
    in bond quality and reliability.'
author:
- first_name: Paul
  full_name: Eichwald, Paul
  last_name: Eichwald
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Simon
  full_name: Althof, Simon
  last_name: Althof
- first_name: Florian
  full_name: Eacock, Florian
  last_name: Eacock
- first_name: Andreas
  full_name: Unger, Andreas
  last_name: Unger
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Karsten
  full_name: Guth, Karsten
  last_name: Guth
citation:
  ama: 'Eichwald P, Sextro W, Althof S, et al. Analysis Method of Tool Topography
    Change and Identification of Wear Indicators for Heavy Copper Wire Wedge Bonding.
    In: <i>Proceedings of the 47th International Symposium on Microelectronics</i>.
    ; 2014:856-861. doi:<a href="https://doi.org/10.4071/isom-THP34">10.4071/isom-THP34</a>'
  apa: Eichwald, P., Sextro, W., Althof, S., Eacock, F., Unger, A., Meyer, T., &#38;
    Guth, K. (2014). Analysis Method of Tool Topography Change and Identification
    of Wear Indicators for Heavy Copper Wire Wedge Bonding. In <i>Proceedings of the
    47th International Symposium on Microelectronics</i> (pp. 856–861). <a href="https://doi.org/10.4071/isom-THP34">https://doi.org/10.4071/isom-THP34</a>
  bibtex: '@inproceedings{Eichwald_Sextro_Althof_Eacock_Unger_Meyer_Guth_2014, title={Analysis
    Method of Tool Topography Change and Identification of Wear Indicators for Heavy
    Copper Wire Wedge Bonding}, DOI={<a href="https://doi.org/10.4071/isom-THP34">10.4071/isom-THP34</a>},
    booktitle={Proceedings of the 47th International Symposium on Microelectronics},
    author={Eichwald, Paul and Sextro, Walter and Althof, Simon and Eacock, Florian
    and Unger, Andreas and Meyer, Tobias and Guth, Karsten}, year={2014}, pages={856–861}
    }'
  chicago: Eichwald, Paul, Walter Sextro, Simon Althof, Florian Eacock, Andreas Unger,
    Tobias Meyer, and Karsten Guth. “Analysis Method of Tool Topography Change and
    Identification of Wear Indicators for Heavy Copper Wire Wedge Bonding.” In <i>Proceedings
    of the 47th International Symposium on Microelectronics</i>, 856–61, 2014. <a
    href="https://doi.org/10.4071/isom-THP34">https://doi.org/10.4071/isom-THP34</a>.
  ieee: P. Eichwald <i>et al.</i>, “Analysis Method of Tool Topography Change and
    Identification of Wear Indicators for Heavy Copper Wire Wedge Bonding,” in <i>Proceedings
    of the 47th International Symposium on Microelectronics</i>, 2014, pp. 856–861.
  mla: Eichwald, Paul, et al. “Analysis Method of Tool Topography Change and Identification
    of Wear Indicators for Heavy Copper Wire Wedge Bonding.” <i>Proceedings of the
    47th International Symposium on Microelectronics</i>, 2014, pp. 856–61, doi:<a
    href="https://doi.org/10.4071/isom-THP34">10.4071/isom-THP34</a>.
  short: 'P. Eichwald, W. Sextro, S. Althof, F. Eacock, A. Unger, T. Meyer, K. Guth,
    in: Proceedings of the 47th International Symposium on Microelectronics, 2014,
    pp. 856–861.'
date_created: 2019-05-20T12:18:55Z
date_updated: 2020-05-07T05:33:45Z
department:
- _id: '151'
doi: 10.4071/isom-THP34
keyword:
- wedge/wedge bonding
- copper wire
- tool wear
language:
- iso: eng
page: 856-861
project:
- _id: '92'
  grant_number: 02 PQ2210
  name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: Proceedings of the 47th International Symposium on Microelectronics
status: public
title: Analysis Method of Tool Topography Change and Identification of Wear Indicators
  for Heavy Copper Wire Wedge Bonding
type: conference
user_id: '210'
year: '2014'
...
---
_id: '9873'
abstract:
- lang: eng
  text: Intelligent technical systems, which combine mechanical, electrical and software
    engineering with methods from control engineering and advanced mathematics, go
    far beyond the state of the art in mechatronics and open up fascinating perspectives.
    Among these systems are so-called self-optimizing systems, which are able to adapt
    their behavior autonomously and flexibly to changing operating conditions. The
    Collaborative Research Center 614 "Self-optimizing concepts and structures in
    mechanical engineering" pursued the long-term aim to enable others to develop
    dependable self-optimizing systems. Assuring their dependability poses new challenges.
    However, self-optimization also offers the possibility to adapt the system's behavior
    to improve dependability during operation. The aim of this book is to provide
    methods and techniques to master the challenges and to exploit the possibilities
    given by self-optimization. The reader will be able to develop self-optimizing
    systems that fulfill and surpass today’s dependability requirements easily. This
    book is directed to researchers and practitioners alike. It gives a brief introduction
    to the holistic development approach for self-optimizing mechatronic systems and
    the steps required to assure a dependable product design starting with the very
    early conceptual design phase. A guideline to select suitable methods for each
    step and the methods themselves are included. Each method is individually introduced,
    many examples and full references are given.
author:
- first_name: Jürgen
  full_name: Gausemeier, Jürgen
  last_name: Gausemeier
- first_name: Franz
  full_name: Josef Rammig, Franz
  last_name: Josef Rammig
- first_name: Wilhelm
  full_name: Schäfer, Wilhelm
  last_name: Schäfer
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Gausemeier J, Josef Rammig F, Schäfer W, Sextro W. <i>Dependability of Self-Optimizing
    Mechatronic Systems</i>. Vol Lecture Notes in Mechanical Engineering. Springer
    Berlin Heidelberg; 2014.
  apa: Gausemeier, J., Josef Rammig, F., Schäfer, W., &#38; Sextro, W. (2014). <i>Dependability
    of Self-Optimizing Mechatronic Systems</i> (Vol. Lecture Notes in Mechanical Engineering).
    Springer Berlin Heidelberg.
  bibtex: '@book{Gausemeier_Josef Rammig_Schäfer_Sextro_2014, title={Dependability
    of Self-Optimizing Mechatronic Systems}, volume={Lecture Notes in Mechanical Engineering},
    publisher={Springer Berlin Heidelberg}, author={Gausemeier, Jürgen and Josef Rammig,
    Franz and Schäfer, Wilhelm and Sextro, Walter}, year={2014} }'
  chicago: Gausemeier, Jürgen, Franz Josef Rammig, Wilhelm Schäfer, and Walter Sextro.
    <i>Dependability of Self-Optimizing Mechatronic Systems</i>. Vol. Lecture Notes
    in Mechanical Engineering. Springer Berlin Heidelberg, 2014.
  ieee: J. Gausemeier, F. Josef Rammig, W. Schäfer, and W. Sextro, <i>Dependability
    of Self-Optimizing Mechatronic Systems</i>, vol. Lecture Notes in Mechanical Engineering.
    Springer Berlin Heidelberg, 2014.
  mla: Gausemeier, Jürgen, et al. <i>Dependability of Self-Optimizing Mechatronic
    Systems</i>. Vol. Lecture Notes in Mechanical Engineering, Springer Berlin Heidelberg,
    2014.
  short: J. Gausemeier, F. Josef Rammig, W. Schäfer, W. Sextro, Dependability of Self-Optimizing
    Mechatronic Systems, Springer Berlin Heidelberg, 2014.
date_created: 2019-05-20T12:57:54Z
date_updated: 2019-05-20T13:00:58Z
department:
- _id: '151'
language:
- iso: eng
publisher: Springer Berlin Heidelberg
status: public
title: Dependability of Self-Optimizing Mechatronic Systems
type: book
user_id: '55222'
volume: Lecture Notes in Mechanical Engineering
year: '2014'
...
---
_id: '9874'
author:
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
- first_name: Christoph
  full_name: Sondermann-Wölke, Christoph
  last_name: Sondermann-Wölke
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Hemsel T, Bornmann P, Morita T, Sondermann-Wölke C, Sextro W. Reliability analysis
    of ultrasonic power transducers. <i>Archive of Applied Mechanics</i>. 2014:1-7.
    doi:<a href="https://doi.org/10.1007/s00419-014-0965-4">10.1007/s00419-014-0965-4</a>
  apa: Hemsel, T., Bornmann, P., Morita, T., Sondermann-Wölke, C., &#38; Sextro, W.
    (2014). Reliability analysis of ultrasonic power transducers. <i>Archive of Applied
    Mechanics</i>, 1–7. <a href="https://doi.org/10.1007/s00419-014-0965-4">https://doi.org/10.1007/s00419-014-0965-4</a>
  bibtex: '@article{Hemsel_Bornmann_Morita_Sondermann-Wölke_Sextro_2014, title={Reliability
    analysis of ultrasonic power transducers}, DOI={<a href="https://doi.org/10.1007/s00419-014-0965-4">10.1007/s00419-014-0965-4</a>},
    journal={Archive of Applied Mechanics}, publisher={Springer Berlin Heidelberg},
    author={Hemsel, Tobias and Bornmann, Peter and Morita, Takeshi and Sondermann-Wölke,
    Christoph and Sextro, Walter}, year={2014}, pages={1–7} }'
  chicago: Hemsel, Tobias, Peter Bornmann, Takeshi Morita, Christoph Sondermann-Wölke,
    and Walter Sextro. “Reliability Analysis of Ultrasonic Power Transducers.” <i>Archive
    of Applied Mechanics</i>, 2014, 1–7. <a href="https://doi.org/10.1007/s00419-014-0965-4">https://doi.org/10.1007/s00419-014-0965-4</a>.
  ieee: T. Hemsel, P. Bornmann, T. Morita, C. Sondermann-Wölke, and W. Sextro, “Reliability
    analysis of ultrasonic power transducers,” <i>Archive of Applied Mechanics</i>,
    pp. 1–7, 2014.
  mla: Hemsel, Tobias, et al. “Reliability Analysis of Ultrasonic Power Transducers.”
    <i>Archive of Applied Mechanics</i>, Springer Berlin Heidelberg, 2014, pp. 1–7,
    doi:<a href="https://doi.org/10.1007/s00419-014-0965-4">10.1007/s00419-014-0965-4</a>.
  short: T. Hemsel, P. Bornmann, T. Morita, C. Sondermann-Wölke, W. Sextro, Archive
    of Applied Mechanics (2014) 1–7.
date_created: 2019-05-20T13:01:25Z
date_updated: 2019-09-16T10:57:23Z
department:
- _id: '151'
doi: 10.1007/s00419-014-0965-4
keyword:
- Reliability
- Ultrasonic power transducers
- FMEA
language:
- iso: eng
page: 1-7
publication: Archive of Applied Mechanics
publication_identifier:
  issn:
  - 0939-1533
publisher: Springer Berlin Heidelberg
quality_controlled: '1'
status: public
title: Reliability analysis of ultrasonic power transducers
type: journal_article
user_id: '55222'
year: '2014'
...
---
_id: '9876'
abstract:
- lang: eng
  text: Piezoelectric inertia motors use the inertia of a body to drive it by means
    of a friction contact in a series of small steps. It has been shown previously
    in theoretical investigations that higher velocities and smoother movements can
    be obtained if these steps do not contain phases of stiction (''stick-slip`` operation),
    but use sliding friction only (''slip-slip`` operation). One very promising driving
    option for such motors is the superposition of multiple sinusoidal signals or
    harmonics. In this contribution, the theoretical results are validated experimentally.
    In this context, a quick and reliable identification process for parameters describing
    the friction contact is proposed. Additionally, the force generation potential
    of inertia motors is investigated theoretically and experimentally. The experimental
    results confirm the theoretical result that for a given maximum frequency, a signal
    with a high fundamental frequency and consisting of two superposed sine waves
    leads to the highest velocity and the smoothest motion, while the maximum motor
    force is obtained with signals containing more harmonics. These results are of
    fundamental importance for the further development of high-velocity piezoelectric
    inertia motors.
author:
- first_name: Matthias
  full_name: Hunstig, Matthias
  last_name: Hunstig
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Hunstig M, Hemsel T, Sextro W. High-velocity operation of piezoelectric inertia
    motors: experimental validation. <i>Archive of Applied Mechanics</i>. 2014:1-9.
    doi:<a href="https://doi.org/10.1007/s00419-014-0940-0">10.1007/s00419-014-0940-0</a>'
  apa: 'Hunstig, M., Hemsel, T., &#38; Sextro, W. (2014). High-velocity operation
    of piezoelectric inertia motors: experimental validation. <i>Archive of Applied
    Mechanics</i>, 1–9. <a href="https://doi.org/10.1007/s00419-014-0940-0">https://doi.org/10.1007/s00419-014-0940-0</a>'
  bibtex: '@article{Hunstig_Hemsel_Sextro_2014, title={High-velocity operation of
    piezoelectric inertia motors: experimental validation}, DOI={<a href="https://doi.org/10.1007/s00419-014-0940-0">10.1007/s00419-014-0940-0</a>},
    journal={Archive of Applied Mechanics}, publisher={Springer Berlin Heidelberg},
    author={Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, year={2014},
    pages={1–9} }'
  chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “High-Velocity Operation
    of Piezoelectric Inertia Motors: Experimental Validation.” <i>Archive of Applied
    Mechanics</i>, 2014, 1–9. <a href="https://doi.org/10.1007/s00419-014-0940-0">https://doi.org/10.1007/s00419-014-0940-0</a>.'
  ieee: 'M. Hunstig, T. Hemsel, and W. Sextro, “High-velocity operation of piezoelectric
    inertia motors: experimental validation,” <i>Archive of Applied Mechanics</i>,
    pp. 1–9, 2014.'
  mla: 'Hunstig, Matthias, et al. “High-Velocity Operation of Piezoelectric Inertia
    Motors: Experimental Validation.” <i>Archive of Applied Mechanics</i>, Springer
    Berlin Heidelberg, 2014, pp. 1–9, doi:<a href="https://doi.org/10.1007/s00419-014-0940-0">10.1007/s00419-014-0940-0</a>.'
  short: M. Hunstig, T. Hemsel, W. Sextro, Archive of Applied Mechanics (2014) 1–9.
date_created: 2019-05-20T13:08:08Z
date_updated: 2019-05-20T13:08:43Z
department:
- _id: '151'
doi: 10.1007/s00419-014-0940-0
keyword:
- Inertia motor
- High velocity
- Stick-slip motor
- Slip-slip operation
- Friction parameter identification
language:
- iso: eng
page: 1-9
publication: Archive of Applied Mechanics
publication_identifier:
  issn:
  - 0939-1533
publisher: Springer Berlin Heidelberg
status: public
title: 'High-velocity operation of piezoelectric inertia motors: experimental validation'
type: journal_article
user_id: '55222'
year: '2014'
...
---
_id: '9879'
abstract:
- lang: eng
  text: Application of prognostics and health management (PHM) in the field of Proton
    Exchange Membrane (PEM) fuel cells is emerging as an important tool in increasing
    the reliability and availability of these systems. Though a lot of work is currently
    being conducted to develop PHM systems for fuel cells, various challenges have
    been encountered including the self-healing effect after characterization as well
    as accelerated degradation due to dynamic loading, all which make RUL predictions
    a difficult task. In this study, a prognostic approach based on adaptive particle
    filter algorithm is proposed. The novelty of the proposed method lies in the introduction
    of a self-healing factor after each characterization and the adaption of the degradation
    model parameters to fit to the changing degradation trend. An ensemble of five
    different state models based on weighted mean is then developed. The results show
    that the method is effective in estimating the remaining useful life of PEM fuel
    cells, with majority of the predictions falling within 5\% error. The method was
    employed in the IEEE 2014 PHM Data Challenge and led to our team emerging the
    winner of the RUL category of the challenge.
author:
- first_name: 'James Kuria '
  full_name: 'Kimotho, James Kuria '
  last_name: Kimotho
- first_name: Tobias
  full_name: Meyer, Tobias
  last_name: Meyer
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Kimotho JK, Meyer T, Sextro W. PEM fuel cell prognostics using particle filter
    with model parameter adaptation. In: <i>Prognostics and Health Management (PHM),
    2014 IEEE Conference On</i>. ; 2014:1-6. doi:<a href="https://doi.org/10.1109/ICPHM.2014.7036406">10.1109/ICPHM.2014.7036406</a>'
  apa: Kimotho, J. K., Meyer, T., &#38; Sextro, W. (2014). PEM fuel cell prognostics
    using particle filter with model parameter adaptation. In <i>Prognostics and Health
    Management (PHM), 2014 IEEE Conference on</i> (pp. 1–6). <a href="https://doi.org/10.1109/ICPHM.2014.7036406">https://doi.org/10.1109/ICPHM.2014.7036406</a>
  bibtex: '@inproceedings{Kimotho_Meyer_Sextro_2014, title={PEM fuel cell prognostics
    using particle filter with model parameter adaptation}, DOI={<a href="https://doi.org/10.1109/ICPHM.2014.7036406">10.1109/ICPHM.2014.7036406</a>},
    booktitle={Prognostics and Health Management (PHM), 2014 IEEE Conference on},
    author={Kimotho, James Kuria  and Meyer, Tobias and Sextro, Walter}, year={2014},
    pages={1–6} }'
  chicago: Kimotho, James Kuria , Tobias Meyer, and Walter Sextro. “PEM Fuel Cell
    Prognostics Using Particle Filter with Model Parameter Adaptation.” In <i>Prognostics
    and Health Management (PHM), 2014 IEEE Conference On</i>, 1–6, 2014. <a href="https://doi.org/10.1109/ICPHM.2014.7036406">https://doi.org/10.1109/ICPHM.2014.7036406</a>.
  ieee: J. K. Kimotho, T. Meyer, and W. Sextro, “PEM fuel cell prognostics using particle
    filter with model parameter adaptation,” in <i>Prognostics and Health Management
    (PHM), 2014 IEEE Conference on</i>, 2014, pp. 1–6.
  mla: Kimotho, James Kuria, et al. “PEM Fuel Cell Prognostics Using Particle Filter
    with Model Parameter Adaptation.” <i>Prognostics and Health Management (PHM),
    2014 IEEE Conference On</i>, 2014, pp. 1–6, doi:<a href="https://doi.org/10.1109/ICPHM.2014.7036406">10.1109/ICPHM.2014.7036406</a>.
  short: 'J.K. Kimotho, T. Meyer, W. Sextro, in: Prognostics and Health Management
    (PHM), 2014 IEEE Conference On, 2014, pp. 1–6.'
date_created: 2019-05-20T13:11:02Z
date_updated: 2019-05-20T13:12:27Z
department:
- _id: '151'
doi: 10.1109/ICPHM.2014.7036406
keyword:
- ageing
- particle filtering (numerical methods)
- proton exchange membrane fuel cells
- remaining life assessment
- PEM fuel cell prognostics
- PHM
- RUL predictions
- accelerated degradation
- adaptive particle filter algorithm
- dynamic loading
- model parameter adaptation
- prognostics and health management
- proton exchange membrane fuel cells
- remaining useful life estimation
- self-healing effect
- Adaptation models
- Data models
- Degradation
- Estimation
- Fuel cells
- Mathematical model
- Prognostics and health management
language:
- iso: eng
page: 1-6
publication: Prognostics and Health Management (PHM), 2014 IEEE Conference on
status: public
title: PEM fuel cell prognostics using particle filter with model parameter adaptation
type: conference
user_id: '55222'
year: '2014'
...
