---
_id: '9807'
abstract:
- lang: eng
text: Recently, focus on maintenance strategies has been shifted towards prognostic
health management (PHM) and a number of state of the art algorithms based on data-driven
prognostics have been developed to predict the health states of degrading components
based on sensory data. Amongst these algorithms, Multiclass Support Vector Machines
(MC-SVM) has gained popularity due to its relatively high classification accuracy,
ability to classify multiple patterns and capability to handle noisy /incomplete
data. However, its application is limited by the difficulty in determining the
required kernel function and penalty parameters. To address this problem, this
paper proposes a hybrid differential evolution -- particle swarm optimization
(DE-PSO) algorithm to optimize the MC-SVM kernel function and penalty parameters.
The differential algorithm (DE) obtains the search limit for the SVM parameters,
while the particle swarm optimization algorithm (PSO) determines the global optimum
parameters for a given training data set. Since degrading machinery components
display several degradation stages in their lifetime, the MC-SVM trained with
optimum parameters are used to estimate the health states of a degrading machinery
component, from which the remaining useful life (RUL) is predicted. This method
improves the classification accuracy of MC-SVM in predicting the health states
of a machinery component and consequently increases the accuracy of RUL predictions.
The feasibility of the method is validated using bearing prognostic run-to-failure
data obtained from NASA public data repository. A comparative study between MC-SVM
with parameters obtained using simple grid search with n-fold cross validation
and MCSVM with DE-PSO based on prognostic performance metrics reveals that the
proposed method has better performance, with all the cases considered falling
within a 10 \% error margin. The method also outperforms other soft computing
methods proposed in literature.
author:
- first_name: James Kuria
full_name: Kimotho, James Kuria
last_name: Kimotho
- first_name: Christopher
full_name: Sondermann-Wölke, Christopher
last_name: Sondermann-Wölke
- 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, Sondermann-Wölke C, Meyer T, Sextro W. Machinery Prognostic Method
Based on Multi-Class Support Vector Machines and Hybrid Differential Evolution
-- Particle Swarm Optimization. Chemical Engineering Transactions. 2013;33:619-624.
doi:10.3303/CET1333104
apa: Kimotho, J. K., Sondermann-Wölke, C., Meyer, T., & Sextro, W. (2013). Machinery
Prognostic Method Based on Multi-Class Support Vector Machines and Hybrid Differential
Evolution -- Particle Swarm Optimization. Chemical Engineering Transactions,
33, 619–624. https://doi.org/10.3303/CET1333104
bibtex: '@article{Kimotho_Sondermann-Wölke_Meyer_Sextro_2013, title={Machinery Prognostic
Method Based on Multi-Class Support Vector Machines and Hybrid Differential Evolution
-- Particle Swarm Optimization}, volume={33}, DOI={10.3303/CET1333104},
journal={Chemical Engineering Transactions}, author={Kimotho, James Kuria and
Sondermann-Wölke, Christopher and Meyer, Tobias and Sextro, Walter}, year={2013},
pages={619–624} }'
chicago: 'Kimotho, James Kuria, Christopher Sondermann-Wölke, Tobias Meyer, and
Walter Sextro. “Machinery Prognostic Method Based on Multi-Class Support Vector
Machines and Hybrid Differential Evolution -- Particle Swarm Optimization.” Chemical
Engineering Transactions 33 (2013): 619–24. https://doi.org/10.3303/CET1333104.'
ieee: J. K. Kimotho, C. Sondermann-Wölke, T. Meyer, and W. Sextro, “Machinery Prognostic
Method Based on Multi-Class Support Vector Machines and Hybrid Differential Evolution
-- Particle Swarm Optimization,” Chemical Engineering Transactions, vol.
33, pp. 619–624, 2013.
mla: Kimotho, James Kuria, et al. “Machinery Prognostic Method Based on Multi-Class
Support Vector Machines and Hybrid Differential Evolution -- Particle Swarm Optimization.”
Chemical Engineering Transactions, vol. 33, 2013, pp. 619–24, doi:10.3303/CET1333104.
short: J.K. Kimotho, C. Sondermann-Wölke, T. Meyer, W. Sextro, Chemical Engineering
Transactions 33 (2013) 619–624.
date_created: 2019-05-13T14:13:26Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
doi: 10.3303/CET1333104
intvolume: ' 33'
language:
- iso: eng
page: 619-624
publication: Chemical Engineering Transactions
status: public
title: Machinery Prognostic Method Based on Multi-Class Support Vector Machines and
Hybrid Differential Evolution -- Particle Swarm Optimization
type: journal_article
user_id: '55222'
volume: 33
year: '2013'
...
---
_id: '9808'
abstract:
- lang: eng
text: This study presents the methods employed by a team from the department of
Mechatronics and Dynamics at the University of Paderborn, Germany for the 2013
PHM data challenge. The focus of the challenge was on maintenance action recommendation
for an industrial machinery based on remote monitoring and diagnosis. Since an
ensemble of data driven methods has been considered as the state of the art approach
in diagnosis and prognosis, the first approach was to evaluate the performance
of an ensemble of data driven methods using the parametric data as input and problems
(recommended maintenance action) as the output. Due to close correlation of parametric
data of different problems, this approach produced high misclassification rate.
Event-based decision trees were then constructed to identify problems associated
with particular events. To distinguish between problems associated with events
that appeared in multiple problems, support vector machine (SVM) with parameters
optimally tuned using particle swarm optimization (PSO) was employed. Parametric
data was used as the input to the SVM algorithm and majority voting was employed
to determine the final decision for cases with multiple events. A total of 165
SVM models were constructed. This approach improved the overall score from 21
to 48. The method was further enhanced by employing an ensemble of three data
driven methods, that is, SVM, random forests (RF) and bagged trees (BT), to build
the event based models. With this approach, a score of 51 was obtained . The results
demonstrate that the proposed event based method can be effective in maintenance
action recommendation based on events codes and parametric data acquired remotely
from an industrial equipment.
author:
- first_name: James Kuria
full_name: Kimotho, James Kuria
last_name: Kimotho
- first_name: Chritoph
full_name: Sondermann-Wölke, Chritoph
last_name: Sondermann-Wölke
- 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, Sondermann-Wölke C, Meyer T, Sextro W. Application of Event Based
Decision Tree and Ensemble of Data Driven Methods for Maintenance Action Recommendation.
International Journal of Prognostics and Health Management. 2013;4(2).
apa: Kimotho, J. K., Sondermann-Wölke, C., Meyer, T., & Sextro, W. (2013). Application
of Event Based Decision Tree and Ensemble of Data Driven Methods for Maintenance
Action Recommendation. International Journal of Prognostics and Health Management,
4(2).
bibtex: '@article{Kimotho_Sondermann-Wölke_Meyer_Sextro_2013, title={Application
of Event Based Decision Tree and Ensemble of Data Driven Methods for Maintenance
Action Recommendation}, volume={4}, number={2}, journal={International Journal
of Prognostics and Health Management}, author={Kimotho, James Kuria and Sondermann-Wölke,
Chritoph and Meyer, Tobias and Sextro, Walter}, year={2013} }'
chicago: Kimotho, James Kuria, Chritoph Sondermann-Wölke, Tobias Meyer, and Walter
Sextro. “Application of Event Based Decision Tree and Ensemble of Data Driven
Methods for Maintenance Action Recommendation.” International Journal of Prognostics
and Health Management 4, no. 2 (2013).
ieee: J. K. Kimotho, C. Sondermann-Wölke, T. Meyer, and W. Sextro, “Application
of Event Based Decision Tree and Ensemble of Data Driven Methods for Maintenance
Action Recommendation,” International Journal of Prognostics and Health Management,
vol. 4, no. 2, 2013.
mla: Kimotho, James Kuria, et al. “Application of Event Based Decision Tree and
Ensemble of Data Driven Methods for Maintenance Action Recommendation.” International
Journal of Prognostics and Health Management, vol. 4, no. 2, 2013.
short: J.K. Kimotho, C. Sondermann-Wölke, T. Meyer, W. Sextro, International Journal
of Prognostics and Health Management 4 (2013).
date_created: 2019-05-13T14:15:36Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
intvolume: ' 4'
issue: '2'
keyword:
- maintenance decision
- Bagged trees
- Decision trees
- PSO-SVM
- Random forests
language:
- iso: eng
publication: International Journal of Prognostics and Health Management
quality_controlled: '1'
status: public
title: Application of Event Based Decision Tree and Ensemble of Data Driven Methods
for Maintenance Action Recommendation
type: journal_article
user_id: '55222'
volume: 4
year: '2013'
...
---
_id: '9855'
abstract:
- lang: eng
text: During wheel bumping caused by stochastic road excitation, the wheel performs
rotational and translational movements. The bump and rebound wheel velocity leads
to significant angular velocities based on the (elasto-)kinematics of the suspension
system. Based on the gyroscopic effect, moments arise about the rotating wheel
induced by the angular change while bumping. Therefore it leads to undesirable
wheel changes and degrades the tire contact and finally decreases the driving
stability. A flexible MBS-model of the five-link rear axle system that includes
these effects has been built up to allow a detailed investigation of the gyroscopic
effect. Using the simulation results, conclusions can be drawn for refining design
criteria for the kinematics, elastokinematics and topology of the suspension system
to increase the active safety of the vehicle
author:
- first_name: Sergej
full_name: Kohl, Sergej
last_name: Kohl
- first_name: Armin
full_name: Zuber, Armin
last_name: Zuber
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Kohl S, Zuber A, Sextro W. Modelbased Investigations of Gyroscopic Effect
on the (Elasto-)Kinematics of Suspension Systems. In: Proc. Appl. Math. Mech.
Vol 13. ; 2013:23-24. doi:10.1002/pamm.201310007'
apa: Kohl, S., Zuber, A., & Sextro, W. (2013). Modelbased Investigations of
Gyroscopic Effect on the (Elasto-)Kinematics of Suspension Systems. In Proc.
Appl. Math. Mech. (Vol. 13, pp. 23–24). https://doi.org/10.1002/pamm.201310007
bibtex: '@inproceedings{Kohl_Zuber_Sextro_2013, title={Modelbased Investigations
of Gyroscopic Effect on the (Elasto-)Kinematics of Suspension Systems}, volume={13},
DOI={10.1002/pamm.201310007},
booktitle={Proc. Appl. Math. Mech.}, author={Kohl, Sergej and Zuber, Armin and
Sextro, Walter}, year={2013}, pages={23–24} }'
chicago: Kohl, Sergej, Armin Zuber, and Walter Sextro. “Modelbased Investigations
of Gyroscopic Effect on the (Elasto-)Kinematics of Suspension Systems.” In Proc.
Appl. Math. Mech., 13:23–24, 2013. https://doi.org/10.1002/pamm.201310007.
ieee: S. Kohl, A. Zuber, and W. Sextro, “Modelbased Investigations of Gyroscopic
Effect on the (Elasto-)Kinematics of Suspension Systems,” in Proc. Appl. Math.
Mech., 2013, vol. 13, pp. 23–24.
mla: Kohl, Sergej, et al. “Modelbased Investigations of Gyroscopic Effect on the
(Elasto-)Kinematics of Suspension Systems.” Proc. Appl. Math. Mech., vol.
13, 2013, pp. 23–24, doi:10.1002/pamm.201310007.
short: 'S. Kohl, A. Zuber, W. Sextro, in: Proc. Appl. Math. Mech., 2013, pp. 23–24.'
date_created: 2019-05-20T11:01:42Z
date_updated: 2019-05-20T11:03:25Z
department:
- _id: '151'
doi: 10.1002/pamm.201310007
intvolume: ' 13'
language:
- iso: eng
page: 23-24
publication: Proc. Appl. Math. Mech.
status: public
title: Modelbased Investigations of Gyroscopic Effect on the (Elasto-)Kinematics of
Suspension Systems
type: conference
user_id: '55222'
volume: 13
year: '2013'
...
---
_id: '9858'
abstract:
- lang: eng
text: In this contribution, we introduce a multiobjective optimization used to calculate
safe optimal working points for a mechatronic system by including stochastic safety-critical
signals in an objective function. Our application example consists of a linear
drive for a rail-bound vehicle and an actuation unit. The linear drive's secondary
part is fixed; the primary part is vehicle-mounted and can be adjusted vertically
to account for deviations of the height of the secondary part. A small air gap
between both parts improves efficiency, but increases the risk of a collision
between the two parts. Using height data of the secondary part, a trajectory for
the vertical adjustment of the primary part is calculated. However, unexpected
deviations necessitate a readjustment of the air gap. The probability of such
unexpected height deviations can be calculated from the readjustment data. The
system is equipped with sensors to measure the air gap. Assuming that the sensor
noise is normally distributed, noise characteristics are determined. Using this
information and the probability distribution of unexpected height deviations,
the probability of a collision is determined.T he sensor noise and the probability
of a collision between both parts of the linear drive are included in the dynamical
model of the system. Using multiobjective optimization, pareto-optimal working
points for the controller of the air gap are obtained. By selecting an appropriate
working point, safe operation can be ensured.
author:
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Christina
full_name: Hölscher, Christina
last_name: Hölscher
- first_name: Michael
full_name: Menke, Michael
last_name: Menke
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Detmar
full_name: Zimmer, Detmar
last_name: Zimmer
citation:
ama: 'Meyer T, Hölscher C, Menke M, Sextro W, Zimmer D. Multiobjective Optimization
including Safety of Operation Applied to a Linear Drive System. In: Proc. Appl.
Math. Mech. Vol 13. ; 2013:483-484. doi:10.1002/pamm.201310234'
apa: Meyer, T., Hölscher, C., Menke, M., Sextro, W., & Zimmer, D. (2013). Multiobjective
Optimization including Safety of Operation Applied to a Linear Drive System. In
Proc. Appl. Math. Mech. (Vol. 13, pp. 483–484). https://doi.org/10.1002/pamm.201310234
bibtex: '@inproceedings{Meyer_Hölscher_Menke_Sextro_Zimmer_2013, title={Multiobjective
Optimization including Safety of Operation Applied to a Linear Drive System},
volume={13}, DOI={10.1002/pamm.201310234},
booktitle={Proc. Appl. Math. Mech.}, author={Meyer, Tobias and Hölscher, Christina
and Menke, Michael and Sextro, Walter and Zimmer, Detmar}, year={2013}, pages={483–484}
}'
chicago: Meyer, Tobias, Christina Hölscher, Michael Menke, Walter Sextro, and Detmar
Zimmer. “Multiobjective Optimization Including Safety of Operation Applied to
a Linear Drive System.” In Proc. Appl. Math. Mech., 13:483–84, 2013. https://doi.org/10.1002/pamm.201310234.
ieee: T. Meyer, C. Hölscher, M. Menke, W. Sextro, and D. Zimmer, “Multiobjective
Optimization including Safety of Operation Applied to a Linear Drive System,”
in Proc. Appl. Math. Mech., 2013, vol. 13, pp. 483–484.
mla: Meyer, Tobias, et al. “Multiobjective Optimization Including Safety of Operation
Applied to a Linear Drive System.” Proc. Appl. Math. Mech., vol. 13, 2013,
pp. 483–84, doi:10.1002/pamm.201310234.
short: 'T. Meyer, C. Hölscher, M. Menke, W. Sextro, D. Zimmer, in: Proc. Appl. Math.
Mech., 2013, pp. 483–484.'
date_created: 2019-05-20T11:10:20Z
date_updated: 2019-05-20T11:12:54Z
department:
- _id: '151'
doi: 10.1002/pamm.201310234
intvolume: ' 13'
language:
- iso: eng
page: 483-484
publication: Proc. Appl. Math. Mech.
status: public
title: Multiobjective Optimization including Safety of Operation Applied to a Linear
Drive System
type: conference
user_id: '55222'
volume: 13
year: '2013'
...
---
_id: '9859'
abstract:
- lang: eng
text: Self-optimizing mechatronic systems allow the adaptation of the system's behavior
to the current situation. This can be used to actively adapt the behavior to the
current degradation state of the system or of some of its components. To this
end, the Multi-Level Dependability Concept has been developed. In this contribution,
we show how the Multi-Level Dependability Concept has been applied to the active
suspension module of an innovative rail-bound vehicle. For this module, the usage
of control reconfiguration, which is a novel approach to exploit complex redundancy
systems, is required. We show that by combining self-optimization with the possibilities
given by control reconfiguration, the dependability of a complex mechatronic system
can be greatly improved.
author:
- first_name: Tobias
full_name: Meyer , Tobias
last_name: 'Meyer '
- first_name: Jan
full_name: Henning Keßler, Jan
last_name: Henning Keßler
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Ansgar
full_name: Trächtler, Ansgar
last_name: Trächtler
citation:
ama: 'Meyer T, Henning Keßler J, Sextro W, Trächtler A. Increasing Intelligent
Systems’ Reliability by Using Reconfiguration. In: Proceedings of the Annual
Reliability and Maintainability Symposium (RAMS). Orlando, FL; 2013. doi:10.1109/RAMS.2013.6517636'
apa: Meyer , T., Henning Keßler, J., Sextro, W., & Trächtler, A. (2013). Increasing
Intelligent Systems’ Reliability by Using Reconfiguration. In Proceedings of
the Annual Reliability and Maintainability Symposium (RAMS). Orlando, FL.
https://doi.org/10.1109/RAMS.2013.6517636
bibtex: '@inproceedings{Meyer _Henning Keßler_Sextro_Trächtler_2013, place={Orlando,
FL}, title={Increasing Intelligent Systems’ Reliability by Using Reconfiguration},
DOI={10.1109/RAMS.2013.6517636},
booktitle={Proceedings of the Annual Reliability and Maintainability Symposium
(RAMS)}, author={Meyer , Tobias and Henning Keßler, Jan and Sextro, Walter and
Trächtler, Ansgar}, year={2013} }'
chicago: Meyer , Tobias, Jan Henning Keßler, Walter Sextro, and Ansgar Trächtler.
“Increasing Intelligent Systems’ Reliability by Using Reconfiguration.” In Proceedings
of the Annual Reliability and Maintainability Symposium (RAMS). Orlando, FL,
2013. https://doi.org/10.1109/RAMS.2013.6517636.
ieee: T. Meyer , J. Henning Keßler, W. Sextro, and A. Trächtler, “Increasing Intelligent
Systems’ Reliability by Using Reconfiguration,” in Proceedings of the Annual
Reliability and Maintainability Symposium (RAMS), 2013.
mla: Meyer , Tobias, et al. “Increasing Intelligent Systems’ Reliability by Using
Reconfiguration.” Proceedings of the Annual Reliability and Maintainability
Symposium (RAMS), 2013, doi:10.1109/RAMS.2013.6517636.
short: 'T. Meyer , J. Henning Keßler, W. Sextro, A. Trächtler, in: Proceedings of
the Annual Reliability and Maintainability Symposium (RAMS), Orlando, FL, 2013.'
date_created: 2019-05-20T11:13:14Z
date_updated: 2019-09-16T11:22:45Z
department:
- _id: '151'
doi: 10.1109/RAMS.2013.6517636
language:
- iso: eng
place: Orlando, FL
publication: Proceedings of the Annual Reliability and Maintainability Symposium (RAMS)
quality_controlled: '1'
status: public
title: Increasing Intelligent Systems' Reliability by Using Reconfiguration
type: conference
user_id: '55222'
year: '2013'
...
---
_id: '9860'
abstract:
- lang: eng
text: Self-optimizing mechatronic systems offer possibilities well beyond those
of traditional mechatronic systems. Among these is the adaptation of the system
behavior to the current situation. To do so, they are able to choose from different
working points, which are pre-calculated using multiobjective optimization and
are thus Pareto-optimal with regard to the chosen objective functions. In this
contribution, a method is presented that allows to continuously control the system
degradation by adapting the behavior of a selfoptimizing system throughout its
complete lifetime. The current remaining useful lifetime is estimated and then
related to the spent lifetime and the desired useful lifetime. Using this information,
a reliability-related objective is prioritized using a closed-loop control, which
in turn is used to determine the working point of the self-optimizing system.
This way, the desired useful lifetime can be achieved. To exemplify the setup
of the controller structure and to demonstrate the adaptation of the system behavior,
a dynamic model of a clutch system is used. It can be seen that the closed loop
controller is able to correct for external perturbations, such as changed requirements,
as well as changed system parameters. This way, the modeled system is able to
achieve the desired lifetime reliably.
author:
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- 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, Sondermann-Wölke C, Kimotho JK, Sextro W. Controlling the Remaining
Useful Lifetime using Self-Optimization. Chemical Engineering Transactions.
2013;33:625-630. doi:10.3303/CET1333105
apa: Meyer, T., Sondermann-Wölke, C., Kimotho, J. K., & Sextro, W. (2013). Controlling
the Remaining Useful Lifetime using Self-Optimization. Chemical Engineering
Transactions, 33, 625–630. https://doi.org/10.3303/CET1333105
bibtex: '@article{Meyer_Sondermann-Wölke_Kimotho_Sextro_2013, title={Controlling
the Remaining Useful Lifetime using Self-Optimization}, volume={33}, DOI={10.3303/CET1333105},
journal={Chemical Engineering Transactions}, author={Meyer, Tobias and Sondermann-Wölke,
Christoph and Kimotho, James Kuria and Sextro, Walter}, year={2013}, pages={625–630}
}'
chicago: 'Meyer, Tobias, Christoph Sondermann-Wölke, James Kuria Kimotho, and Walter
Sextro. “Controlling the Remaining Useful Lifetime Using Self-Optimization.” Chemical
Engineering Transactions 33 (2013): 625–30. https://doi.org/10.3303/CET1333105.'
ieee: T. Meyer, C. Sondermann-Wölke, J. K. Kimotho, and W. Sextro, “Controlling
the Remaining Useful Lifetime using Self-Optimization,” Chemical Engineering
Transactions, vol. 33, pp. 625–630, 2013.
mla: Meyer, Tobias, et al. “Controlling the Remaining Useful Lifetime Using Self-Optimization.”
Chemical Engineering Transactions, vol. 33, 2013, pp. 625–30, doi:10.3303/CET1333105.
short: T. Meyer, C. Sondermann-Wölke, J.K. Kimotho, W. Sextro, Chemical Engineering
Transactions 33 (2013) 625–630.
date_created: 2019-05-20T11:15:59Z
date_updated: 2019-09-16T11:20:50Z
department:
- _id: '151'
doi: 10.3303/CET1333105
intvolume: ' 33'
language:
- iso: eng
page: 625-630
publication: Chemical Engineering Transactions
quality_controlled: '1'
status: public
title: Controlling the Remaining Useful Lifetime using Self-Optimization
type: journal_article
user_id: '55222'
volume: 33
year: '2013'
...
---
_id: '9861'
abstract:
- lang: eng
text: Selbstoptimierende mechatronische Systeme bieten die Möglichkeit, ihr Verhalten
an geänderte Umgebungsbedingungen anzupassen. Dazu werden beispielsweise redundante
Strukturen genutzt, Reglerparameter angepasst oder Regelstrategien umgeschaltet.
Dies kann auch genutzt werden, um die Zuverlässigkeit des Systems zu steigern.
Zugleich entstehen aber durch die gesteigerte Komplexität dieser Systeme zusätzliche
Risiken. Um sicherzustellen, dass das System dennoch die gestellten Anforderungen
bezüglich der Zuverlässigkeit erfüllt, ist eine Modellierung des Gesamtsystems
und anschließende Zuverlässigkeitsbewertung notwendig. Dies ist aufgrund der situationsabhängigen
Verhaltensanpassung und des nicht intuitiv vorhersehbaren Verhaltens jedoch nicht
mit klassischen Verfahren möglich. Ein Modellierungsverfahren, das diese Eigenschaften
abbilden kann, ist LARES (LAnguage for REconfigurable dependable Systems). Die
Anwendung von LARES zur Bewertung der Zuverlässigkeit eines selbstoptimierenden
Systems wird anhand des Feder-Neige-Moduls gezeigt. Es ist eine Baugruppe der
Fahrzeuge eines innovativen Bahnsystems, der RailCabs. Das Feder-Neige-Modul dient
dazu, unerwünschte Schwingungen des Fahrzeugaufbaus zu minimieren. Mit LARES können
die Hardware-Komponenten des Systems, ihre in Abhängigkeit von der aktuellen Situation
veränderten Belastungen sowie die nicht-deterministische Verhaltensadaption modelliert
werden.
author:
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Martin
full_name: Riedl, Martin
last_name: Riedl
- first_name: Alexander
full_name: Gouberman, Alexander
last_name: Gouberman
- first_name: Markus
full_name: Siegle, Markus
last_name: Siegle
citation:
ama: 'Meyer T, Sondermann-Wölke C, Sextro W, Riedl M, Gouberman A, Siegle M. Bewertung
der Zuverlässigkeit selbstoptimierender Systeme mit dem LARES-Framework. In: Gausemeier
J, Dumitrescu R, Rammig F, Schäfer W, Trächtler A, eds. 9. Paderborner Workshop
Entwurf Mechatronischer Systeme. HNI-Verlagsschriftenreihe. Paderborn: Heinz
Nixdorf Institut, Universität Paderborn; 2013:161-174.'
apa: 'Meyer, T., Sondermann-Wölke, C., Sextro, W., Riedl, M., Gouberman, A., &
Siegle, M. (2013). Bewertung der Zuverlässigkeit selbstoptimierender Systeme mit
dem LARES-Framework. In J. Gausemeier, R. Dumitrescu, F. Rammig, W. Schäfer, &
A. Trächtler (Eds.), 9. Paderborner Workshop Entwurf mechatronischer Systeme
(pp. 161–174). Paderborn: Heinz Nixdorf Institut, Universität Paderborn.'
bibtex: '@inproceedings{Meyer_Sondermann-Wölke_Sextro_Riedl_Gouberman_Siegle_2013,
place={Paderborn}, series={HNI-Verlagsschriftenreihe}, title={Bewertung der Zuverlässigkeit
selbstoptimierender Systeme mit dem LARES-Framework}, booktitle={9. Paderborner
Workshop Entwurf mechatronischer Systeme}, publisher={Heinz Nixdorf Institut,
Universität Paderborn}, author={Meyer, Tobias and Sondermann-Wölke, Christoph
and Sextro, Walter and Riedl, Martin and Gouberman, Alexander and Siegle, Markus},
editor={Gausemeier, Jürgen and Dumitrescu, Roman and Rammig, Franz and Schäfer,
Wilhelm and Trächtler, AnsgarEditors}, year={2013}, pages={161–174}, collection={HNI-Verlagsschriftenreihe}
}'
chicago: 'Meyer, Tobias, Christoph Sondermann-Wölke, Walter Sextro, Martin Riedl,
Alexander Gouberman, and Markus Siegle. “Bewertung Der Zuverlässigkeit Selbstoptimierender
Systeme Mit Dem LARES-Framework.” In 9. Paderborner Workshop Entwurf Mechatronischer
Systeme, edited by Jürgen Gausemeier, Roman Dumitrescu, Franz Rammig, Wilhelm
Schäfer, and Ansgar Trächtler, 161–74. HNI-Verlagsschriftenreihe. Paderborn: Heinz
Nixdorf Institut, Universität Paderborn, 2013.'
ieee: T. Meyer, C. Sondermann-Wölke, W. Sextro, M. Riedl, A. Gouberman, and M. Siegle,
“Bewertung der Zuverlässigkeit selbstoptimierender Systeme mit dem LARES-Framework,”
in 9. Paderborner Workshop Entwurf mechatronischer Systeme, 2013, pp. 161–174.
mla: Meyer, Tobias, et al. “Bewertung Der Zuverlässigkeit Selbstoptimierender Systeme
Mit Dem LARES-Framework.” 9. Paderborner Workshop Entwurf Mechatronischer Systeme,
edited by Jürgen Gausemeier et al., Heinz Nixdorf Institut, Universität Paderborn,
2013, pp. 161–74.
short: 'T. Meyer, C. Sondermann-Wölke, W. Sextro, M. Riedl, A. Gouberman, M. Siegle,
in: J. Gausemeier, R. Dumitrescu, F. Rammig, W. Schäfer, A. Trächtler (Eds.),
9. Paderborner Workshop Entwurf Mechatronischer Systeme, Heinz Nixdorf Institut,
Universität Paderborn, Paderborn, 2013, pp. 161–174.'
date_created: 2019-05-20T11:18:06Z
date_updated: 2019-09-30T08:10:44Z
department:
- _id: '151'
editor:
- first_name: Jürgen
full_name: Gausemeier, Jürgen
last_name: Gausemeier
- first_name: Roman
full_name: Dumitrescu, Roman
last_name: Dumitrescu
- first_name: Franz
full_name: Rammig, Franz
last_name: Rammig
- first_name: Wilhelm
full_name: Schäfer, Wilhelm
last_name: Schäfer
- first_name: Ansgar
full_name: Trächtler, Ansgar
last_name: Trächtler
language:
- iso: eng
page: 161-174
place: Paderborn
publication: 9. Paderborner Workshop Entwurf mechatronischer Systeme
publisher: Heinz Nixdorf Institut, Universität Paderborn
quality_controlled: '1'
series_title: HNI-Verlagsschriftenreihe
status: public
title: Bewertung der Zuverlässigkeit selbstoptimierender Systeme mit dem LARES-Framework
type: conference
user_id: '55222'
year: '2013'
...
---
_id: '9781'
abstract:
- lang: eng
text: 'A piezoelectric energy harvester is an electromechanical device that converts
ambient mechanical vibration into electric power. Most existing vibration energy
harvesting devices operate effectively at a single frequency only, dictated by
the design of the device. This frequency must match the frequency of the host
structure vibration. However, real world structural vibrations rarely have a specific
constant frequency. Therefore, piezoelectric harvesters that generate usable power
across a range of exciting frequencies are required to make this technology commercially
viable. Currently known harvester tuning techniques have many limitations, in
particular they miss the ability to work during harvester operation and most often
cannot perform a precise tuning. This paper describes the design and testing of
a vibration energy harvester with tunable resonance frequency, wherein the tuning
is accomplished by changing the attraction force between two permanent magnets
by adjusting the distance between the magnets. This tuning technique allows the
natural frequency to be manipulated before and during operation of the harvester.
Furthermore the paper presents a physical description of the frequency tuning
effect. The experimental results achieved with a piezoelectric bimorph fit the
calculated results very well. The calculation and experimental results show that
using this tuning technique the natural frequency of the harvester can be varied
efficiently within a wide range: in the test setup, the natural frequency of the
piezoelectric bimorph could be increased by more than 70\%.'
author:
- first_name: Waleed
full_name: Al-Ashtari, Waleed
last_name: Al-Ashtari
- 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: Al-Ashtari W, Hunstig M, Hemsel T, Sextro W. Frequency tuning of piezoelectric
energy harvesters by magnetic force. Smart Materials and Structures. 2012;21(3):035019.
apa: Al-Ashtari, W., Hunstig, M., Hemsel, T., & Sextro, W. (2012). Frequency
tuning of piezoelectric energy harvesters by magnetic force. Smart Materials
and Structures, 21(3), 035019.
bibtex: '@article{Al-Ashtari_Hunstig_Hemsel_Sextro_2012, title={Frequency tuning
of piezoelectric energy harvesters by magnetic force}, volume={21}, number={3},
journal={Smart Materials and Structures}, author={Al-Ashtari, Waleed and Hunstig,
Matthias and Hemsel, Tobias and Sextro, Walter}, year={2012}, pages={035019} }'
chicago: 'Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro.
“Frequency Tuning of Piezoelectric Energy Harvesters by Magnetic Force.” Smart
Materials and Structures 21, no. 3 (2012): 035019.'
ieee: W. Al-Ashtari, M. Hunstig, T. Hemsel, and W. Sextro, “Frequency tuning of
piezoelectric energy harvesters by magnetic force,” Smart Materials and Structures,
vol. 21, no. 3, p. 035019, 2012.
mla: Al-Ashtari, Waleed, et al. “Frequency Tuning of Piezoelectric Energy Harvesters
by Magnetic Force.” Smart Materials and Structures, vol. 21, no. 3, 2012,
p. 035019.
short: W. Al-Ashtari, M. Hunstig, T. Hemsel, W. Sextro, Smart Materials and Structures
21 (2012) 035019.
date_created: 2019-05-13T13:16:33Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
intvolume: ' 21'
issue: '3'
language:
- iso: eng
page: '035019'
publication: Smart Materials and Structures
quality_controlled: '1'
status: public
title: Frequency tuning of piezoelectric energy harvesters by magnetic force
type: journal_article
user_id: '55222'
volume: 21
year: '2012'
...
---
_id: '9782'
abstract:
- lang: eng
text: Piezoelectric structures are nowadays used in many different applications.
A better understanding of the influence of material properties and geometrical
design on the performance of these structures helps to develop piezoelectric structures
specifically designed for their application. Different equivalent circuits have
been introduced in the literature to investigate the behaviour of piezoelectric
transducers. The model parameters are usually determined from measurements covering
the characteristic frequencies of the piezoelectric transducer. This article introduces
an analytical technique for calculating the mechanical and electrical equivalent
system parameters and characteristic frequencies based on material properties
and geometry for a cantilever bimorph structure. The model is validated by measurements
using a cantilever bimorph and fits the experimental results better than previous
models. The model gives a full set of piezoelectric transducer parameters and
is therefore well suited for further theoretical investigations of piezoelectric
transducers for different applications. The results also show that even small
manufacturing tolerances have a considerable effect on the system parameters and
characteristic frequencies. This might lead to intolerable deviations, especially
in dynamic applications and should be avoided by careful design and production.
author:
- first_name: Waleed
full_name: Al-Ashtari, Waleed
last_name: Al-Ashtari
- 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: Al-Ashtari W, Hunstig M, Hemsel T, Sextro W. Analytical determination of characteristic
frequencies and equivalent circuit parameters of a piezoelectric bimorph. Journal
of Intelligent Material Systems and Structures. 2012;23(1):15-23. doi:10.1177/1045389X11430742
apa: Al-Ashtari, W., Hunstig, M., Hemsel, T., & Sextro, W. (2012). Analytical
determination of characteristic frequencies and equivalent circuit parameters
of a piezoelectric bimorph. Journal of Intelligent Material Systems and Structures,
23(1), 15–23. https://doi.org/10.1177/1045389X11430742
bibtex: '@article{Al-Ashtari_Hunstig_Hemsel_Sextro_2012, title={Analytical determination
of characteristic frequencies and equivalent circuit parameters of a piezoelectric
bimorph}, volume={23}, DOI={10.1177/1045389X11430742},
number={1}, journal={Journal of Intelligent Material Systems and Structures},
author={Al-Ashtari, Waleed and Hunstig, Matthias and Hemsel, Tobias and Sextro,
Walter}, year={2012}, pages={15–23} }'
chicago: 'Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro.
“Analytical Determination of Characteristic Frequencies and Equivalent Circuit
Parameters of a Piezoelectric Bimorph.” Journal of Intelligent Material Systems
and Structures 23, no. 1 (2012): 15–23. https://doi.org/10.1177/1045389X11430742.'
ieee: W. Al-Ashtari, M. Hunstig, T. Hemsel, and W. Sextro, “Analytical determination
of characteristic frequencies and equivalent circuit parameters of a piezoelectric
bimorph,” Journal of Intelligent Material Systems and Structures, vol.
23, no. 1, pp. 15–23, 2012.
mla: Al-Ashtari, Waleed, et al. “Analytical Determination of Characteristic Frequencies
and Equivalent Circuit Parameters of a Piezoelectric Bimorph.” Journal of Intelligent
Material Systems and Structures, vol. 23, no. 1, 2012, pp. 15–23, doi:10.1177/1045389X11430742.
short: W. Al-Ashtari, M. Hunstig, T. Hemsel, W. Sextro, Journal of Intelligent Material
Systems and Structures 23 (2012) 15–23.
date_created: 2019-05-13T13:17:37Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1177/1045389X11430742
intvolume: ' 23'
issue: '1'
language:
- iso: eng
page: 15-23
publication: Journal of Intelligent Material Systems and Structures
quality_controlled: '1'
status: public
title: Analytical determination of characteristic frequencies and equivalent circuit
parameters of a piezoelectric bimorph
type: journal_article
user_id: '55222'
volume: 23
year: '2012'
...
---
_id: '9783'
abstract:
- lang: eng
text: To optimize the ultrasound irradiation for cavitation based ultrasound applications
like sonochemistry or ultrasound cleaning, the correlation between cavitation
intensity and the resulting effect on the process is of interest. Furthermore,
changing conditions like temperature and pressure result in varying acoustic properties
of the liquid. That might necessitate an adaption of the ultrasound irradiation.
To detect such changes during operation, process monitoring is desired. Labor
intensive processes, that might be carried out for several hours, also require
process monitoring to increase their reliability by detection of changes or malfunctions
during operation. In some applications cavitation detection and monitoring can
be achieved by the application of sensors in the sound field. Though the application
of sensors is possible, this necessitates modifications on the system and the
sensor might disturb the sound field. In other applications harsh, process conditions
prohibit the application of sensors in the sound field. Therefore alternative
techniques for cavitation detection and monitoring are desired. The applicability
of an external microphone and a self-sensing ultrasound transducer for cavitation
detection were experimentally investigated. Both methods were found to be suitable
and easily applicable.
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: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: 'Bornmann P, Hemsel T, Sextro W, Maeda T, Morita T. Non-perturbing cavitation
detection / monitoring in sonochemical reactors. In: Ultrasonics Symposium
(IUS), 2012 IEEE International. ; 2012:1141-1144. doi:10.1109/ULTSYM.2012.0284'
apa: Bornmann, P., Hemsel, T., Sextro, W., Maeda, T., & Morita, T. (2012). Non-perturbing
cavitation detection / monitoring in sonochemical reactors. In Ultrasonics
Symposium (IUS), 2012 IEEE International (pp. 1141–1144). https://doi.org/10.1109/ULTSYM.2012.0284
bibtex: '@inproceedings{Bornmann_Hemsel_Sextro_Maeda_Morita_2012, title={Non-perturbing
cavitation detection / monitoring in sonochemical reactors}, DOI={10.1109/ULTSYM.2012.0284},
booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Bornmann,
Peter and Hemsel, Tobias and Sextro, Walter and Maeda, Takafumi and Morita, Takeshi},
year={2012}, pages={1141–1144} }'
chicago: Bornmann, Peter, Tobias Hemsel, Walter Sextro, Takafumi Maeda, and Takeshi
Morita. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.”
In Ultrasonics Symposium (IUS), 2012 IEEE International, 1141–44, 2012.
https://doi.org/10.1109/ULTSYM.2012.0284.
ieee: P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, and T. Morita, “Non-perturbing
cavitation detection / monitoring in sonochemical reactors,” in Ultrasonics
Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.
mla: Bornmann, Peter, et al. “Non-Perturbing Cavitation Detection / Monitoring in
Sonochemical Reactors.” Ultrasonics Symposium (IUS), 2012 IEEE International,
2012, pp. 1141–44, doi:10.1109/ULTSYM.2012.0284.
short: 'P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, T. Morita, in: Ultrasonics
Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.'
date_created: 2019-05-13T13:18:49Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2012.0284
keyword:
- cavitation
- chemical reactors
- microphones
- process monitoring
- reliability
- ultrasonic applications
- ultrasonic waves
- acoustic properties
- cavitation based ultrasound applications
- cavitation intensity
- change detection reliability
- external microphone
- malfunction detection reliability
- nonperturbing cavitation detection
- nonperturbing cavitation monitoring
- process monitoring
- self-sensing ultrasound transducer
- sonochemical reactors
- sonochemistry
- ultrasound cleaning
- ultrasound irradiation
- Acoustics
- Liquids
- Monitoring
- Sensors
- Sonar equipment
- Transducers
- Ultrasonic imaging
language:
- iso: eng
page: 1141-1144
publication: Ultrasonics Symposium (IUS), 2012 IEEE International
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Non-perturbing cavitation detection / monitoring in sonochemical reactors
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '9787'
author:
- first_name: Sergej
full_name: Kohl, Sergej
last_name: Kohl
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Armin
full_name: Zuber, Armin
last_name: Zuber
citation:
ama: 'Kohl S, Sextro W, Zuber A. Benteler Vehicle Dynamics -- Fahrdynamikentwicklung
basierend auf einer neuen Auslegungstheorie. In: 8. Tag Des Fahrwerks, Aachen,
2012. Institut für Kraftfahrzeuge, RWTH Aachen University in Aachen; 2012:38-60.'
apa: Kohl, S., Sextro, W., & Zuber, A. (2012). Benteler Vehicle Dynamics --
Fahrdynamikentwicklung basierend auf einer neuen Auslegungstheorie. In 8. Tag
des Fahrwerks, Aachen, 2012 (pp. 38–60). Institut für Kraftfahrzeuge, RWTH
Aachen University in Aachen.
bibtex: '@inproceedings{Kohl_Sextro_Zuber_2012, place={Institut für Kraftfahrzeuge,
RWTH Aachen University in Aachen}, title={Benteler Vehicle Dynamics -- Fahrdynamikentwicklung
basierend auf einer neuen Auslegungstheorie}, booktitle={8. Tag des Fahrwerks,
Aachen, 2012}, author={Kohl, Sergej and Sextro, Walter and Zuber, Armin}, year={2012},
pages={38–60} }'
chicago: Kohl, Sergej, Walter Sextro, and Armin Zuber. “Benteler Vehicle Dynamics
-- Fahrdynamikentwicklung Basierend Auf Einer Neuen Auslegungstheorie.” In 8.
Tag Des Fahrwerks, Aachen, 2012, 38–60. Institut für Kraftfahrzeuge, RWTH
Aachen University in Aachen, 2012.
ieee: S. Kohl, W. Sextro, and A. Zuber, “Benteler Vehicle Dynamics -- Fahrdynamikentwicklung
basierend auf einer neuen Auslegungstheorie,” in 8. Tag des Fahrwerks, Aachen,
2012, 2012, pp. 38–60.
mla: Kohl, Sergej, et al. “Benteler Vehicle Dynamics -- Fahrdynamikentwicklung Basierend
Auf Einer Neuen Auslegungstheorie.” 8. Tag Des Fahrwerks, Aachen, 2012,
2012, pp. 38–60.
short: 'S. Kohl, W. Sextro, A. Zuber, in: 8. Tag Des Fahrwerks, Aachen, 2012, Institut
für Kraftfahrzeuge, RWTH Aachen University in Aachen, 2012, pp. 38–60.'
date_created: 2019-05-13T13:25:59Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
language:
- iso: eng
page: 38-60
place: Institut für Kraftfahrzeuge, RWTH Aachen University in Aachen
popular_science: '1'
publication: 8. Tag des Fahrwerks, Aachen, 2012
status: public
title: Benteler Vehicle Dynamics -- Fahrdynamikentwicklung basierend auf einer neuen
Auslegungstheorie
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '9791'
abstract:
- lang: eng
text: 'The rapid development of communication and information technology opens up
fascinating perspectives, which go far beyond the state of the art in mechatronics:
mechatronic systems with inherent partial intelligence. These so called self-optimizing
systems adapt their objectives and behavior autonomously and flexibly to changing
operating conditions. On the one hand, securing the dependability of such systems
is challenging due to their complexity and non-deterministic behavior. On the
other hand, self-optimization can be used to increase the dependability of the
system during its operation. However, it has to be ensured, that the self-optimization
works dependable itself. To cope with these challenges, the multi-level dependability
concept was developed. It enables predictive condition monitoring, influences
the objectives of the system and determines suitable means to improve the system''s
dependability during its operation. In this contribution we introduce a procedure
for the conceptual design of an advanced condition monitoring based on the system''s
principle solution. The principle solution describes the principal operation mode
of the system and its desired behavior. It is modeled using the specification
technique for the domain-spanning description of the principle solution of a self-optimizing
system and consists of a coherent system of eight partial models (e.g. requirements,
active structure, system of objectives, behavior, etc.). The partial models are
analyzed separately in order to derive the components of the multi-level dependability
concept. In particular, the reliability analysis of the partial model active structure
is performed to identify the system elements to be monitored and parameters to
be measured. The principle solution is extended accordingly: e.g. with system
elements required for the realization of the dependability concept. The advantages
of the method are shown on the self-optimizing guidance module of a railroad vehicle.'
author:
- first_name: Christoph
full_name: Sondermann-Wölke , Christoph
last_name: 'Sondermann-Wölke '
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Rafal
full_name: Dorociak, Rafal
last_name: Dorociak
- first_name: Jürgen
full_name: Gausemeier, Jürgen
last_name: Gausemeier
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Sondermann-Wölke C, Meyer T, Dorociak R, Gausemeier J, Sextro W. Conceptual
Design of Advanced Condition Monitoring for a Self-Optimizing System based on
its Principle Solution. In: Proceedings of the 11th International Probabilistic
Safety Assessment and Management Conference (PSAM11) and The Annual European Safety
and Reliability Conference (ESREL2012). Helsinki, Finland; 2012.'
apa: Sondermann-Wölke , C., Meyer, T., Dorociak, R., Gausemeier, J., & Sextro,
W. (2012). Conceptual Design of Advanced Condition Monitoring for a Self-Optimizing
System based on its Principle Solution. In Proceedings of the 11th International
Probabilistic Safety Assessment and Management Conference (PSAM11) and The Annual
European Safety and Reliability Conference (ESREL2012). Helsinki, Finland.
bibtex: '@inproceedings{Sondermann-Wölke _Meyer_Dorociak_Gausemeier_Sextro_2012,
place={Helsinki, Finland}, title={Conceptual Design of Advanced Condition Monitoring
for a Self-Optimizing System based on its Principle Solution}, booktitle={Proceedings
of the 11th International Probabilistic Safety Assessment and Management Conference
(PSAM11) and The Annual European Safety and Reliability Conference (ESREL2012)},
author={Sondermann-Wölke , Christoph and Meyer, Tobias and Dorociak, Rafal and
Gausemeier, Jürgen and Sextro, Walter}, year={2012} }'
chicago: Sondermann-Wölke , Christoph, Tobias Meyer, Rafal Dorociak, Jürgen Gausemeier,
and Walter Sextro. “Conceptual Design of Advanced Condition Monitoring for a Self-Optimizing
System Based on Its Principle Solution.” In Proceedings of the 11th International
Probabilistic Safety Assessment and Management Conference (PSAM11) and The Annual
European Safety and Reliability Conference (ESREL2012). Helsinki, Finland,
2012.
ieee: C. Sondermann-Wölke , T. Meyer, R. Dorociak, J. Gausemeier, and W. Sextro,
“Conceptual Design of Advanced Condition Monitoring for a Self-Optimizing System
based on its Principle Solution,” in Proceedings of the 11th International
Probabilistic Safety Assessment and Management Conference (PSAM11) and The Annual
European Safety and Reliability Conference (ESREL2012), 2012.
mla: Sondermann-Wölke , Christoph, et al. “Conceptual Design of Advanced Condition
Monitoring for a Self-Optimizing System Based on Its Principle Solution.” Proceedings
of the 11th International Probabilistic Safety Assessment and Management Conference
(PSAM11) and The Annual European Safety and Reliability Conference (ESREL2012),
2012.
short: 'C. Sondermann-Wölke , T. Meyer, R. Dorociak, J. Gausemeier, W. Sextro, in:
Proceedings of the 11th International Probabilistic Safety Assessment and Management
Conference (PSAM11) and The Annual European Safety and Reliability Conference
(ESREL2012), Helsinki, Finland, 2012.'
date_created: 2019-05-13T13:41:34Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
keyword:
- Mechatronic Systems
- Principle Solution
- Condition Monitoring
- Conceptual Design
language:
- iso: eng
place: Helsinki, Finland
publication: Proceedings of the 11th International Probabilistic Safety Assessment
and Management Conference (PSAM11) and The Annual European Safety and Reliability
Conference (ESREL2012)
quality_controlled: '1'
status: public
title: Conceptual Design of Advanced Condition Monitoring for a Self-Optimizing System
based on its Principle Solution
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '9806'
abstract:
- lang: eng
text: Piezoelectric inertia motors, also known as ``stick-slip-drives'', use the
inertia of a body to drive it by means of a friction contact in small steps. While
these steps normally involve stiction and sliding, the motors can also operate
in ``slip-slip'' mode without any phase of static friction. In this contribution,
a one degree of freedom model of an inertia motor driven by an ideal actuator
is analysed. Start-up and constant velocity operation of the motor are investigated
and appropriate quantities to compare ``stick-slip'' and ``slip-slip'' operation
are determined. Different aspects such as velocity, uniformity of motion, load
capacity, robustness, efficiency, and wear are considered. The analysis allows
both modes to be applied advantageously in different applications and can widen
the field of application of piezoelectric inertia motors. Motor designers are
enabled to choose the appropriate mode of operation and the best drive parameters
for their individual applications.
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. Analysis of different operation modes for inertia
motors. ACTUATOR 2012 Conference Proceedings. 2012:761-764.
apa: Hunstig, M., Hemsel, T., & Sextro, W. (2012). Analysis of different operation
modes for inertia motors. ACTUATOR 2012 Conference Proceedings, 761–764.
bibtex: '@article{Hunstig_Hemsel_Sextro_2012, title={Analysis of different operation
modes for inertia motors}, journal={ACTUATOR 2012 Conference Proceedings}, author={Hunstig,
Matthias and Hemsel, Tobias and Sextro, Walter}, year={2012}, pages={761–764}
}'
chicago: Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Analysis of Different
Operation Modes for Inertia Motors.” ACTUATOR 2012 Conference Proceedings,
2012, 761–64.
ieee: M. Hunstig, T. Hemsel, and W. Sextro, “Analysis of different operation modes
for inertia motors,” ACTUATOR 2012 Conference Proceedings, pp. 761–764,
2012.
mla: Hunstig, Matthias, et al. “Analysis of Different Operation Modes for Inertia
Motors.” ACTUATOR 2012 Conference Proceedings, 2012, pp. 761–64.
short: M. Hunstig, T. Hemsel, W. Sextro, ACTUATOR 2012 Conference Proceedings (2012)
761–764.
date_created: 2019-05-13T14:11:37Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
keyword:
- Piezoelectric Inertia Motors
- Drive Signals
- Stick-slip
- Slip-slip
language:
- iso: eng
page: 761-764
publication: ACTUATOR 2012 Conference Proceedings
quality_controlled: '1'
status: public
title: Analysis of different operation modes for inertia motors
type: journal_article
user_id: '55222'
year: '2012'
...
---
_id: '26981'
author:
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Peter
full_name: Reinold, Peter
last_name: Reinold
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
citation:
ama: "Sondermann-Wölke C, Sextro W, Reinold P, Trächtler A. Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs. In: Technische
Zuverlässigkeit \x96TTZ. ; 2011."
apa: "Sondermann-Wölke, C., Sextro, W., Reinold, P., & Trächtler, A. (2011).
Zuverlässigkeitsorientierte Mehrzieloptimierung zur Aktorrekonfiguration eines
X-by-wire-Fahrzeugs. Technische Zuverlässigkeit \x96TTZ."
bibtex: "@inproceedings{Sondermann-Wölke_Sextro_Reinold_Trächtler_2011, title={Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs}, booktitle={Technische
Zuverlässigkeit \x96TTZ}, author={Sondermann-Wölke, Christoph and Sextro, Walter
and Reinold, Peter and Trächtler, Ansgar}, year={2011} }"
chicago: "Sondermann-Wölke, Christoph, Walter Sextro, Peter Reinold, and Ansgar
Trächtler. “Zuverlässigkeitsorientierte Mehrzieloptimierung Zur Aktorrekonfiguration
Eines X-by-Wire-Fahrzeugs.” In Technische Zuverlässigkeit \x96TTZ, 2011."
ieee: C. Sondermann-Wölke, W. Sextro, P. Reinold, and A. Trächtler, “Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs,” 2011.
mla: "Sondermann-Wölke, Christoph, et al. “Zuverlässigkeitsorientierte Mehrzieloptimierung
Zur Aktorrekonfiguration Eines X-by-Wire-Fahrzeugs.” Technische Zuverlässigkeit
\x96TTZ, 2011."
short: "C. Sondermann-Wölke, W. Sextro, P. Reinold, A. Trächtler, in: Technische
Zuverlässigkeit \x96TTZ, 2011."
date_created: 2021-10-27T11:04:55Z
date_updated: 2022-01-06T06:57:31Z
department:
- _id: '675'
language:
- iso: eng
publication: "Technische Zuverlässigkeit \x96TTZ"
status: public
title: Zuverlässigkeitsorientierte Mehrzieloptimierung zur Aktorrekonfiguration eines
X-by-wire-Fahrzeugs
type: conference
user_id: '21240'
year: '2011'
...
---
_id: '23184'
author:
- first_name: Oleg
full_name: Lurye, Oleg
last_name: Lurye
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Ivan
full_name: Kromov, Ivan
last_name: Kromov
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
citation:
ama: 'Lurye O, Sondermann-Wölke C, Kromov I, Sextro W, Trächtler A. Verlässlichkeitsanalyse
des Degradationsverhaltens mechatronischer Systeme mit mehreren Betriebsstrategien.
In: VDI Bericht Zur Tagung Technische Zuverlässigkeit. Leonberg: VDI-Verlag;
2011.'
apa: 'Lurye, O., Sondermann-Wölke, C., Kromov, I., Sextro, W., & Trächtler,
A. (2011). Verlässlichkeitsanalyse des Degradationsverhaltens mechatronischer
Systeme mit mehreren Betriebsstrategien. In VDI Bericht zur Tagung Technische
Zuverlässigkeit. Leonberg: VDI-Verlag.'
bibtex: '@inproceedings{Lurye_Sondermann-Wölke_Kromov_Sextro_Trächtler_2011, place={Leonberg},
title={Verlässlichkeitsanalyse des Degradationsverhaltens mechatronischer Systeme
mit mehreren Betriebsstrategien}, booktitle={VDI Bericht zur Tagung Technische
Zuverlässigkeit}, publisher={VDI-Verlag}, author={Lurye, Oleg and Sondermann-Wölke,
Christoph and Kromov, Ivan and Sextro, Walter and Trächtler, Ansgar}, year={2011}
}'
chicago: 'Lurye, Oleg, Christoph Sondermann-Wölke, Ivan Kromov, Walter Sextro, and
Ansgar Trächtler. “Verlässlichkeitsanalyse Des Degradationsverhaltens Mechatronischer
Systeme Mit Mehreren Betriebsstrategien.” In VDI Bericht Zur Tagung Technische
Zuverlässigkeit. Leonberg: VDI-Verlag, 2011.'
ieee: O. Lurye, C. Sondermann-Wölke, I. Kromov, W. Sextro, and A. Trächtler, “Verlässlichkeitsanalyse
des Degradationsverhaltens mechatronischer Systeme mit mehreren Betriebsstrategien,”
in VDI Bericht zur Tagung Technische Zuverlässigkeit, 2011.
mla: Lurye, Oleg, et al. “Verlässlichkeitsanalyse Des Degradationsverhaltens Mechatronischer
Systeme Mit Mehreren Betriebsstrategien.” VDI Bericht Zur Tagung Technische
Zuverlässigkeit, VDI-Verlag, 2011.
short: 'O. Lurye, C. Sondermann-Wölke, I. Kromov, W. Sextro, A. Trächtler, in: VDI
Bericht Zur Tagung Technische Zuverlässigkeit, VDI-Verlag, Leonberg, 2011.'
date_created: 2021-08-09T07:36:17Z
date_updated: 2022-01-06T06:55:47Z
department:
- _id: '153'
language:
- iso: eng
place: Leonberg
publication: VDI Bericht zur Tagung Technische Zuverlässigkeit
publisher: VDI-Verlag
status: public
title: Verlässlichkeitsanalyse des Degradationsverhaltens mechatronischer Systeme
mit mehreren Betriebsstrategien
type: conference
user_id: '24876'
year: '2011'
...
---
_id: '23194'
author:
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Peter
full_name: Reinold, Peter
last_name: Reinold
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
citation:
ama: 'Sondermann-Wölke C, Sextro W, Reinold P, Trächtler A. Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs. In: Technische
Zuverlässigkeit TTZ. ; 2011.'
apa: Sondermann-Wölke, C., Sextro, W., Reinold, P., & Trächtler, A. (2011).
Zuverlässigkeitsorientierte Mehrzieloptimierung zur Aktorrekonfiguration eines
X-by-wire-Fahrzeugs. In Technische Zuverlässigkeit TTZ.
bibtex: '@inproceedings{Sondermann-Wölke_Sextro_Reinold_Trächtler_2011, title={Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs}, booktitle={Technische
Zuverlässigkeit TTZ}, author={Sondermann-Wölke, Christoph and Sextro, Walter and
Reinold, Peter and Trächtler, Ansgar}, year={2011} }'
chicago: Sondermann-Wölke, Christoph, Walter Sextro, Peter Reinold, and Ansgar Trächtler.
“Zuverlässigkeitsorientierte Mehrzieloptimierung Zur Aktorrekonfiguration Eines
X-by-Wire-Fahrzeugs.” In Technische Zuverlässigkeit TTZ, 2011.
ieee: C. Sondermann-Wölke, W. Sextro, P. Reinold, and A. Trächtler, “Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs,” in Technische
Zuverlässigkeit TTZ, 2011.
mla: Sondermann-Wölke, Christoph, et al. “Zuverlässigkeitsorientierte Mehrzieloptimierung
Zur Aktorrekonfiguration Eines X-by-Wire-Fahrzeugs.” Technische Zuverlässigkeit
TTZ, 2011.
short: 'C. Sondermann-Wölke, W. Sextro, P. Reinold, A. Trächtler, in: Technische
Zuverlässigkeit TTZ, 2011.'
date_created: 2021-08-09T07:36:28Z
date_updated: 2022-01-06T06:55:47Z
department:
- _id: '153'
language:
- iso: eng
publication: Technische Zuverlässigkeit TTZ
status: public
title: Zuverlässigkeitsorientierte Mehrzieloptimierung zur Aktorrekonfiguration eines
X-by-wire-Fahrzeugs
type: conference
user_id: '24876'
year: '2011'
...
---
_id: '9768'
author:
- first_name: Oleg
full_name: Lurie, Oleg
last_name: Lurie
- first_name: Ivan
full_name: Kromov, Ivan
last_name: Kromov
- first_name: Ansgar
full_name: Trächtler, Ansgar
last_name: Trächtler
- 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: 'Lurie O, Kromov I, Trächtler A, Sondermann-Wölke C, Sextro W. Dependability
Analysis of the Degradation Behavior of Mechatronics Systems with Different Operating
Strategies. In: 25. Tagung Technische Zuverlässigkeit (TTZ 2011) - Entwicklung
Und Betrieb Zuverlässiger Produkte. Leonberg; 2011:99-110.'
apa: Lurie, O., Kromov, I., Trächtler, A., Sondermann-Wölke, C., & Sextro, W.
(2011). Dependability Analysis of the Degradation Behavior of Mechatronics Systems
with Different Operating Strategies. In 25. Tagung Technische Zuverlässigkeit
(TTZ 2011) - Entwicklung und Betrieb zuverlässiger Produkte (pp. 99–110).
Leonberg.
bibtex: '@inproceedings{Lurie_Kromov_Trächtler_Sondermann-Wölke_Sextro_2011, place={Leonberg},
title={Dependability Analysis of the Degradation Behavior of Mechatronics Systems
with Different Operating Strategies}, booktitle={25. Tagung Technische Zuverlässigkeit
(TTZ 2011) - Entwicklung und Betrieb zuverlässiger Produkte}, author={Lurie, Oleg
and Kromov, Ivan and Trächtler, Ansgar and Sondermann-Wölke, Christoph and Sextro,
Walter}, year={2011}, pages={99–110} }'
chicago: Lurie, Oleg, Ivan Kromov, Ansgar Trächtler, Christoph Sondermann-Wölke,
and Walter Sextro. “Dependability Analysis of the Degradation Behavior of Mechatronics
Systems with Different Operating Strategies.” In 25. Tagung Technische Zuverlässigkeit
(TTZ 2011) - Entwicklung Und Betrieb Zuverlässiger Produkte, 99–110. Leonberg,
2011.
ieee: O. Lurie, I. Kromov, A. Trächtler, C. Sondermann-Wölke, and W. Sextro, “Dependability
Analysis of the Degradation Behavior of Mechatronics Systems with Different Operating
Strategies,” in 25. Tagung Technische Zuverlässigkeit (TTZ 2011) - Entwicklung
und Betrieb zuverlässiger Produkte, 2011, pp. 99–110.
mla: Lurie, Oleg, et al. “Dependability Analysis of the Degradation Behavior of
Mechatronics Systems with Different Operating Strategies.” 25. Tagung Technische
Zuverlässigkeit (TTZ 2011) - Entwicklung Und Betrieb Zuverlässiger Produkte,
2011, pp. 99–110.
short: 'O. Lurie, I. Kromov, A. Trächtler, C. Sondermann-Wölke, W. Sextro, in: 25.
Tagung Technische Zuverlässigkeit (TTZ 2011) - Entwicklung Und Betrieb Zuverlässiger
Produkte, Leonberg, 2011, pp. 99–110.'
date_created: 2019-05-13T10:57:24Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
language:
- iso: eng
page: 99-110
place: Leonberg
publication: 25. Tagung Technische Zuverlässigkeit (TTZ 2011) - Entwicklung und Betrieb
zuverlässiger Produkte
status: public
title: Dependability Analysis of the Degradation Behavior of Mechatronics Systems
with Different Operating Strategies
type: conference
user_id: '55222'
year: '2011'
...
---
_id: '9771'
abstract:
- lang: eng
text: "Dieser Beitrag stellt ein Konzept vor, welches die Methode der Mehrzieloptimierung
mit einer Online-Bewertung des aktuellen Systemzustands kombiniert. Dieses erlaubt
Maßnahmen zur Zuverlässigkeitssteigerung abzuleiten. Das Konzept wird auf ein
X-by-wire-Fahrzeug mit Einzelradaktorik angewandt. Dabei steht zunächst die Beeinflussung
der Ziele der Mehrzieloptimierung zugunsten der Zuverlässigkeit des Systems im
Vordergrund. In Simulationen wird gezeigt, dass über die Wahl und Gewichtung der
Zielfunktionen die Quer- und Längskräfte an den Rädern vorteilhaft verteilt werden
können. \r\n\r\nIn this contribution a concept is illustrated, which combines
the multi-objective optimization technique with an online assessment of the current
system state. This allows deriving measures to increase the reliability of the
system. The concept is applied to an X-by-wire vehicle with single-wheel actuators.
The emphasis is here mostly on the influence of the objectives of the multiobjective
optimization for the benefit of the reliability of the system. It is demonstrated
in simulations, that the lateral and longitudinal forces at the wheels can be
distributed advantageously by the selection of the suitable objective functions
and the appropriate weights."
author:
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Peter
full_name: Reinold, Peter
last_name: Reinold
- first_name: Ansgar
full_name: Trächtler, Ansgar
last_name: Trächtler
citation:
ama: 'Sondermann-Wölke C, Sextro W, Reinold P, Trächtler A. Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs. In: 25.
Tagung Technische Zuverlässigkeit (TTZ 2011) - Entwicklung Und Betrieb Zuverlässiger
Produkte. Leonberg; 2011:291-302.'
apa: Sondermann-Wölke, C., Sextro, W., Reinold, P., & Trächtler, A. (2011).
Zuverlässigkeitsorientierte Mehrzieloptimierung zur Aktorrekonfiguration eines
X-by-wire-Fahrzeugs. In 25. Tagung Technische Zuverlässigkeit (TTZ 2011) -
Entwicklung und Betrieb zuverlässiger Produkte (pp. 291–302). Leonberg.
bibtex: '@inproceedings{Sondermann-Wölke_Sextro_Reinold_Trächtler_2011, place={Leonberg},
title={Zuverlässigkeitsorientierte Mehrzieloptimierung zur Aktorrekonfiguration
eines X-by-wire-Fahrzeugs}, booktitle={25. Tagung Technische Zuverlässigkeit (TTZ
2011) - Entwicklung und Betrieb zuverlässiger Produkte}, author={Sondermann-Wölke,
Christoph and Sextro, Walter and Reinold, Peter and Trächtler, Ansgar}, year={2011},
pages={291–302} }'
chicago: Sondermann-Wölke, Christoph, Walter Sextro, Peter Reinold, and Ansgar Trächtler.
“Zuverlässigkeitsorientierte Mehrzieloptimierung Zur Aktorrekonfiguration Eines
X-by-Wire-Fahrzeugs.” In 25. Tagung Technische Zuverlässigkeit (TTZ 2011) -
Entwicklung Und Betrieb Zuverlässiger Produkte, 291–302. Leonberg, 2011.
ieee: C. Sondermann-Wölke, W. Sextro, P. Reinold, and A. Trächtler, “Zuverlässigkeitsorientierte
Mehrzieloptimierung zur Aktorrekonfiguration eines X-by-wire-Fahrzeugs,” in 25.
Tagung Technische Zuverlässigkeit (TTZ 2011) - Entwicklung und Betrieb zuverlässiger
Produkte, 2011, pp. 291–302.
mla: Sondermann-Wölke, Christoph, et al. “Zuverlässigkeitsorientierte Mehrzieloptimierung
Zur Aktorrekonfiguration Eines X-by-Wire-Fahrzeugs.” 25. Tagung Technische
Zuverlässigkeit (TTZ 2011) - Entwicklung Und Betrieb Zuverlässiger Produkte,
2011, pp. 291–302.
short: 'C. Sondermann-Wölke, W. Sextro, P. Reinold, A. Trächtler, in: 25. Tagung
Technische Zuverlässigkeit (TTZ 2011) - Entwicklung Und Betrieb Zuverlässiger
Produkte, Leonberg, 2011, pp. 291–302.'
date_created: 2019-05-13T11:04:04Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
language:
- iso: eng
page: 291-302
place: Leonberg
publication: 25. Tagung Technische Zuverlässigkeit (TTZ 2011) - Entwicklung und Betrieb
zuverlässiger Produkte
status: public
title: Zuverlässigkeitsorientierte Mehrzieloptimierung zur Aktorrekonfiguration eines
X-by-wire-Fahrzeugs
type: conference
user_id: '55222'
year: '2011'
...
---
_id: '9772'
abstract:
- lang: eng
text: 'A profound description of friction in wheel--rail contact plays an essential
role for optimization of traction control strategies, as input quantity for railway
simulations in general and for the estimation of wear and rolling contact fatigue.
A multitude of wheel--rail contact models exists, however, traction--creepage
curves obtained from measurements show quantitative and qualitative deviations.
There are several phenomena which influence the traction--creepage characteristics:
Mechanisms resulting from surface roughness, frictional heating or the presence
of interfacial fluids can have a dominating influence on friction. In this paper,
a new wheel--rail contact model, accounting for these influential parameters,
will be presented. The presented model accounts for the interaction of an interfacial
fluid model for combined boundary and mixed lubrication of rough surfaces with
a wheel--rail contact model that additionally accounts for frictional heating.
A quantitative comparison with measurements found in the literature is not conducted,
since the exact conditions of the measurements are mostly unknown and parameters
can easily be adjusted to fit the measurements. Emphasis is placed on the qualitative
behavior of the model with respect to the measurements and good agreement is found.
The dependence of the maximum traction coefficient on rolling velocity, surface
roughness and normal load is studied under dry and water lubricated conditions.'
author:
- first_name: Christoph
full_name: Tomberger, Christoph
last_name: Tomberger
- first_name: Peter
full_name: Dietmaier, Peter
last_name: Dietmaier
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Klaus
full_name: Six, Klaus
last_name: Six
citation:
ama: 'Tomberger C, Dietmaier P, Sextro W, Six K. Friction in wheel--rail contact:
A model comprising interfacial fluids, surface roughness and temperature. Wear.
2011;271:2-12. doi:10.1016/j.wear.2010.10.025'
apa: 'Tomberger, C., Dietmaier, P., Sextro, W., & Six, K. (2011). Friction in
wheel--rail contact: A model comprising interfacial fluids, surface roughness
and temperature. Wear, 271, 2–12. https://doi.org/10.1016/j.wear.2010.10.025'
bibtex: '@article{Tomberger_Dietmaier_Sextro_Six_2011, title={Friction in wheel--rail
contact: A model comprising interfacial fluids, surface roughness and temperature},
volume={271}, DOI={10.1016/j.wear.2010.10.025},
journal={Wear}, author={Tomberger, Christoph and Dietmaier, Peter and Sextro,
Walter and Six, Klaus}, year={2011}, pages={2–12} }'
chicago: 'Tomberger, Christoph, Peter Dietmaier, Walter Sextro, and Klaus Six. “Friction
in Wheel--Rail Contact: A Model Comprising Interfacial Fluids, Surface Roughness
and Temperature.” Wear 271 (2011): 2–12. https://doi.org/10.1016/j.wear.2010.10.025.'
ieee: 'C. Tomberger, P. Dietmaier, W. Sextro, and K. Six, “Friction in wheel--rail
contact: A model comprising interfacial fluids, surface roughness and temperature,”
Wear, vol. 271, pp. 2–12, 2011.'
mla: 'Tomberger, Christoph, et al. “Friction in Wheel--Rail Contact: A Model Comprising
Interfacial Fluids, Surface Roughness and Temperature.” Wear, vol. 271,
2011, pp. 2–12, doi:10.1016/j.wear.2010.10.025.'
short: C. Tomberger, P. Dietmaier, W. Sextro, K. Six, Wear 271 (2011) 2–12.
date_created: 2019-05-13T11:08:32Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1016/j.wear.2010.10.025
intvolume: ' 271'
keyword:
- Wheel--rail contact
- Rolling contact
- Friction
- Interfacial fluid
- Lubrication
- Surface roughness
- Contact temperature
language:
- iso: eng
page: 2 - 12
publication: Wear
publication_identifier:
issn:
- 0043-1648
quality_controlled: '1'
status: public
title: 'Friction in wheel--rail contact: A model comprising interfacial fluids, surface
roughness and temperature'
type: journal_article
user_id: '55222'
volume: 271
year: '2011'
...
---
_id: '9790'
abstract:
- lang: eng
text: Es wird eine Anordnung zur mehrdimensionalen Messung von Schwingungen eines
Objektes vorgeschlagen, umfassend ein Vibrometer und eine erste Ablenkeinheit,
mittels welcher der Messstrahl des Vibrometers in wenigstens zwei erste Raumrichtungen
ablenkbar ist, sowie wenigstens eine zweite Ablenkeinheit, mittels welcher der
aus einer der wenigstens zwei ersten Raumrichtungen auf eine zweite Ablenkeinheit
eintreffende Messstrahl derart ablenkbar ist, dass ein Messpunkt des Objekts aus
einer ersten Raumrichtung und wenigstens einer zweiten Raumrichtung oder wenigstens
zwei zweiten Raumrichtungen damit erfassbar ist. Bei dem zum Betrieb der Anordnung
vorgesehenen Verfahren wird der Messstrahl eines Vibrometers in wenigstens zwei
erste Raumrichtungen abgelenkt, woraufhin wenigstens ein Messstrahl einer ersten
Raumrichtung ein zweites Mal derart abgelenkt wird, dass ein Messpunkt des Objekts
aus einer ersten Raumrichtung und wenigstens einer zweiten Raumrichtung oder wenigstens
zwei zweiten Raumrichtungen erfasst wird, insbesondere so dass die zu untersuchenden
Bewegungskomponenten in den Messsignalen, welche entlang der ersten und zweiten
Raumrichtungen gewonnen werden, enthalten sind. The arrangement has a first deflecting
unit (3) for deflecting a measuring beam of a vibrometer (2) in spatial directions
(4-6, 4-6). Second and third deflecting units (7, 8) deflect the beam arriving
from one of the spatial directions such that a measuring point (9) of an object
(1) is detectable with the beam from the spatial direction or the spatial directions.
The first deflecting unit is designed as a scanning unit, where the measuring
point is detected by the scanning unit. A measuring instrument measures focus
quality and is connected to actuators for adjustment of the focus quality. An
independent claim is also included for a method for multidimensional measurement
of oscillations of an object.
application_date: 2010-08-10
application_number: 'DE102010033951A1 '
author:
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: 'Sextro W, Hunstig M, Bornmann P, Hemsel T. Patent DE10201003395: Anordnung
und Verfahren zur mehrdimensionalen Messung von Schwingungen eines Objekts. .
Published online 2011.'
apa: 'Sextro, W., Hunstig, M., Bornmann, P., & Hemsel, T. (2011). Patent
DE10201003395: Anordnung und Verfahren zur mehrdimensionalen Messung von Schwingungen
eines Objekts. .'
bibtex: '@article{Sextro_Hunstig_Bornmann_Hemsel_2011, title={Patent DE10201003395:
Anordnung und Verfahren zur mehrdimensionalen Messung von Schwingungen eines Objekts.
}, author={Sextro, Walter and Hunstig, Matthias and Bornmann, Peter and Hemsel,
Tobias}, year={2011} }'
chicago: 'Sextro, Walter, Matthias Hunstig, Peter Bornmann, and Tobias Hemsel. “Patent
DE10201003395: Anordnung Und Verfahren Zur Mehrdimensionalen Messung von Schwingungen
Eines Objekts. ,” 2011.'
ieee: 'W. Sextro, M. Hunstig, P. Bornmann, and T. Hemsel, “Patent DE10201003395:
Anordnung und Verfahren zur mehrdimensionalen Messung von Schwingungen eines Objekts.
.” 2011.'
mla: 'Sextro, Walter, et al. Patent DE10201003395: Anordnung Und Verfahren Zur
Mehrdimensionalen Messung von Schwingungen Eines Objekts. . 2011.'
short: W. Sextro, M. Hunstig, P. Bornmann, T. Hemsel, (2011).
date_created: 2019-05-13T13:30:26Z
date_updated: 2022-01-06T12:23:38Z
department:
- _id: '151'
ipc: G01H9/00
ipn: DE102010033951B4
publication_date: 2019-05-29
status: public
title: 'Patent DE10201003395: Anordnung und Verfahren zur mehrdimensionalen Messung
von Schwingungen eines Objekts. '
type: patent
user_id: '210'
year: '2011'
...