---
_id: '9795'
abstract:
- lang: eng
text: Power and bandwidth of piezoelectric harvesters can be increased by using
multiple piezoelectric elements in one harvester. In this contribution, a novel
energy harvesting cantilever array with magnetic tuning including three piezoelectric
bimorphs is investigated theoretically and experimentally, with a good agreement
between model and experiment. Other than harvester designs proposed before, this
array is easy to manufacture and insensitive to manufacturing tolerances because
its optimum operation frequency can be re-adjusted after fabrication. Using the
superposition principle, the Butterworth-Van Dyke model and a mechanical lumped
parameters model, the generated voltage and current are determined analytically.
Formulas for calculating the power generated by array harvesters with an arbitrary
number of piezoelectric elements connected in series or in parallel are derived.
It is shown that optimum harvester design must take both the connected load and
the operating frequency into account. Strategies for connecting multiple bimorphs
to increase the maximum generated power and/or enhance the bandwidth compared
to a single bimorph harvester are investigated. For bandwidth enhancement it is
essential that individual rectifiers are used for the bimorphs. An example with
three bimorphs shows that, depending on the chosen tuning strategy, the power
is increased by about 340\% or the bandwidth is increased by about 500\%, compared
to one single bimorph.
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. Enhanced energy harvesting using
multiple piezoelectric elements: Theory and experiments. Sensors and Actuators
A: Physical. 2013;200:138-146. doi:10.1016/j.sna.2013.01.008'
apa: 'Al-Ashtari, W., Hunstig, M., Hemsel, T., & Sextro, W. (2013). Enhanced
energy harvesting using multiple piezoelectric elements: Theory and experiments.
Sensors and Actuators A: Physical, 200, 138–146. https://doi.org/10.1016/j.sna.2013.01.008'
bibtex: '@article{Al-Ashtari_Hunstig_Hemsel_Sextro_2013, title={Enhanced energy
harvesting using multiple piezoelectric elements: Theory and experiments}, volume={200},
DOI={10.1016/j.sna.2013.01.008},
journal={Sensors and Actuators A: Physical}, author={Al-Ashtari, Waleed and Hunstig,
Matthias and Hemsel, Tobias and Sextro, Walter}, year={2013}, pages={138–146}
}'
chicago: 'Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro.
“Enhanced Energy Harvesting Using Multiple Piezoelectric Elements: Theory and
Experiments.” Sensors and Actuators A: Physical 200 (2013): 138–46. https://doi.org/10.1016/j.sna.2013.01.008.'
ieee: 'W. Al-Ashtari, M. Hunstig, T. Hemsel, and W. Sextro, “Enhanced energy harvesting
using multiple piezoelectric elements: Theory and experiments,” Sensors and
Actuators A: Physical, vol. 200, pp. 138–146, 2013.'
mla: 'Al-Ashtari, Waleed, et al. “Enhanced Energy Harvesting Using Multiple Piezoelectric
Elements: Theory and Experiments.” Sensors and Actuators A: Physical, vol.
200, 2013, pp. 138–46, doi:10.1016/j.sna.2013.01.008.'
short: 'W. Al-Ashtari, M. Hunstig, T. Hemsel, W. Sextro, Sensors and Actuators A:
Physical 200 (2013) 138–146.'
date_created: 2019-05-13T13:51:59Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1016/j.sna.2013.01.008
intvolume: ' 200'
keyword:
- Energy harvesting
- Cantilever array
- Bandwidth
- Power increase
language:
- iso: eng
page: 138 - 146
publication: 'Sensors and Actuators A: Physical'
status: public
title: 'Enhanced energy harvesting using multiple piezoelectric elements: Theory and
experiments'
type: journal_article
user_id: '55222'
volume: 200
year: '2013'
...
---
_id: '9796'
abstract:
- lang: eng
text: 'A basic autonomous system powered by a piezoelectric harvester contains three
components apart from the harvester: a fullwave rectifier, a reservoir capacitor
and an electronic device performing the primary task of the system. In this contribution,
a model describing the operation of such a system is derived. It is found that
in steady-state operation, the piezoelectric harvester experiences two alternating
load conditions due to the rectification process. These alternating load conditions
can have a significant effect on the operation of the harvester and must be considered
in the design of autonomous systems. The results also show that such an autonomous
system works efficiently if it is connected to a high impedance load and excited
by a frequency matching the anti-resonance frequency of the piezoelectric harvester.'
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. Characteristics of Piezoelectric
Energy Harvesters in Autonomous Systems. In: Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop, Hannover, Germany, 14.-17.7.2013. Berichte aus dem IDS. Hannover,
Germany; 2013:159-161.'
apa: Al-Ashtari, W., Hunstig, M., Hemsel, T., & Sextro, W. (2013). Characteristics
of Piezoelectric Energy Harvesters in Autonomous Systems. In Proceedings of
10th International Workshop on Piezoelectric Materials and Applications and 8th
Energy Harvesting Workshop, Hannover, Germany, 14.-17.7.2013 (pp. 159–161).
Hannover, Germany.
bibtex: '@inproceedings{Al-Ashtari_Hunstig_Hemsel_Sextro_2013, place={Hannover,
Germany}, series={Berichte aus dem IDS}, title={Characteristics of Piezoelectric
Energy Harvesters in Autonomous Systems}, number={05/2013}, booktitle={Proceedings
of 10th International Workshop on Piezoelectric Materials and Applications and
8th Energy Harvesting Workshop, Hannover, Germany, 14.-17.7.2013}, author={Al-Ashtari,
Waleed and Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, year={2013},
pages={159–161}, collection={Berichte aus dem IDS} }'
chicago: Al-Ashtari, Waleed, Matthias Hunstig, Tobias Hemsel, and Walter Sextro.
“Characteristics of Piezoelectric Energy Harvesters in Autonomous Systems.” In
Proceedings of 10th International Workshop on Piezoelectric Materials and Applications
and 8th Energy Harvesting Workshop, Hannover, Germany, 14.-17.7.2013, 159–61.
Berichte Aus Dem IDS. Hannover, Germany, 2013.
ieee: W. Al-Ashtari, M. Hunstig, T. Hemsel, and W. Sextro, “Characteristics of Piezoelectric
Energy Harvesters in Autonomous Systems,” in Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop, Hannover, Germany, 14.-17.7.2013, 2013, no. 05/2013, pp. 159–161.
mla: Al-Ashtari, Waleed, et al. “Characteristics of Piezoelectric Energy Harvesters
in Autonomous Systems.” Proceedings of 10th International Workshop on Piezoelectric
Materials and Applications and 8th Energy Harvesting Workshop, Hannover, Germany,
14.-17.7.2013, no. 05/2013, 2013, pp. 159–61.
short: 'W. Al-Ashtari, M. Hunstig, T. Hemsel, W. Sextro, in: Proceedings of 10th
International Workshop on Piezoelectric Materials and Applications and 8th Energy
Harvesting Workshop, Hannover, Germany, 14.-17.7.2013, Hannover, Germany, 2013,
pp. 159–161.'
date_created: 2019-05-13T13:53:25Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
issue: 05/2013
keyword:
- Energy harvesting
- harvester modeling
- load dependence
- generated voltage
language:
- iso: eng
page: 159-161
place: Hannover, Germany
publication: Proceedings of 10th International Workshop on Piezoelectric Materials
and Applications and 8th Energy Harvesting Workshop, Hannover, Germany, 14.-17.7.2013
quality_controlled: '1'
series_title: Berichte aus dem IDS
status: public
title: Characteristics of Piezoelectric Energy Harvesters in Autonomous Systems
type: conference
user_id: '55222'
year: '2013'
...
---
_id: '9797'
abstract:
- lang: eng
text: A model approach for wedge/wedge bonding copper wire is presented. The connection
between wire and substrate is based on a variety of physical effects, but the
dominant one is the friction based welding while applying ultrasound. Consequently,
a friction model was used to investigate the welding process. This model is built
up universal and can be used to describe the formation of micro welds in the time
variant contact area between wire and substrate. Aim of the model is to identify
the interactions between touchdown, bond normal force, ultrasonic power and bonding
time. To do so, the contact area is discretized into partial areas where a Point
Contact Model is applied. Based on this approach it is possible to simulate micro
and macro slip inside the contact area between wire and substrate. The work done
by friction force is a main criterion to define occurring micro joints which influence
the subsequent welding.
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. A friction based approach for modeling
wire bonding. In: IMAPS 2013, 46th International Symposium on Microelectronics.
Orlando (Florida), USA; 2013. doi:10.4071/isom-2013-TA67'
apa: Althoff, S., Neuhaus, J., Hemsel, T., & Sextro, W. (2013). A friction based
approach for modeling wire bonding. In IMAPS 2013, 46th International Symposium
on Microelectronics. Orlando (Florida), USA. https://doi.org/10.4071/isom-2013-TA67
bibtex: '@inproceedings{Althoff_Neuhaus_Hemsel_Sextro_2013, place={Orlando (Florida),
USA}, title={A friction based approach for modeling wire bonding}, DOI={10.4071/isom-2013-TA67},
booktitle={IMAPS 2013, 46th International Symposium on Microelectronics}, author={Althoff,
Simon and Neuhaus, Jan and Hemsel, Tobias and Sextro, Walter}, year={2013} }'
chicago: Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “A Friction
Based Approach for Modeling Wire Bonding.” In IMAPS 2013, 46th International
Symposium on Microelectronics. Orlando (Florida), USA, 2013. https://doi.org/10.4071/isom-2013-TA67.
ieee: S. Althoff, J. Neuhaus, T. Hemsel, and W. Sextro, “A friction based approach
for modeling wire bonding,” in IMAPS 2013, 46th International Symposium on
Microelectronics, 2013.
mla: Althoff, Simon, et al. “A Friction Based Approach for Modeling Wire Bonding.”
IMAPS 2013, 46th International Symposium on Microelectronics, 2013, doi:10.4071/isom-2013-TA67.
short: 'S. Althoff, J. Neuhaus, T. Hemsel, W. Sextro, in: IMAPS 2013, 46th International
Symposium on Microelectronics, Orlando (Florida), USA, 2013.'
date_created: 2019-05-13T13:55:36Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.4071/isom-2013-TA67
keyword:
- Wire bonding
- friction modeling
- wire bond quality
- contact element modeling
language:
- iso: eng
place: Orlando (Florida), USA
publication: IMAPS 2013, 46th International Symposium on Microelectronics
status: public
title: A friction based approach for modeling wire bonding
type: conference
user_id: '55222'
year: '2013'
...
---
_id: '9799'
abstract:
- lang: eng
text: 'Ultrasonic wire bonding is a common technology for manufacturing electrical
interconnects. In the field of power electronics, new thermal and electrical obligations
arose due to increasing power density requirements. One approach to achieve these
aims is replacing the wire material for heavy wire bonds from aluminum to copper.
This material change leads to challenging tasks and problems, for instance the
occurring wear of the bond tool. The wear is significantly higher using copper
wire instead of aluminum and results in a dramatic loss in the amount of interconnects
which can be produced reliable by a single tool. To reduce setting-up time in
the production and minimizing costs, an enlarged bonding tool lifetime is desirable.
Therefore, the paper discusses the influences of bonding parameters on the wear.
The key question is which of the tasks cannot be fulfilled with increased wear
of the tool, e.g. loss of process capability. The main functions are fixing the
wire in the tool groove, predeformation, applying normal force and transmission
of ultrasonic oscillation to the wire. To identify the most affecting factors,
four bonding parameters are varied and their influences are investigated. These
parameters are: (I) ultrasonic power, (II) tool geometry, (III) the way of tangential
force transmission and (IV) loop trajectory.'
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: Althoff, Simon
last_name: Althoff
- first_name: Florian
full_name: Eacock, Florian
last_name: Eacock
- first_name: Mark
full_name: Schnietz, Mark
last_name: Schnietz
- first_name: Karsten
full_name: Guth, Karsten
last_name: Guth
- first_name: Michael
full_name: Brökelmann, Michael
last_name: Brökelmann
citation:
ama: 'Eichwald P, Sextro W, Althoff S, et al. Influences of Bonding Parameters on
the Tool Wear for Copper Wire Bonding. In: 15th Electronics Packaging Technology
Conference. ; 2013. doi:10.1109/EPTC.2013.6745803'
apa: Eichwald, P., Sextro, W., Althoff, S., Eacock, F., Schnietz, M., Guth, K.,
& Brökelmann, M. (2013). Influences of Bonding Parameters on the Tool Wear
for Copper Wire Bonding. In 15th Electronics Packaging Technology Conference.
https://doi.org/10.1109/EPTC.2013.6745803
bibtex: '@inproceedings{Eichwald_Sextro_Althoff_Eacock_Schnietz_Guth_Brökelmann_2013,
title={Influences of Bonding Parameters on the Tool Wear for Copper Wire Bonding},
DOI={10.1109/EPTC.2013.6745803},
booktitle={15th Electronics Packaging Technology Conference}, author={Eichwald,
Paul and Sextro, Walter and Althoff, Simon and Eacock, Florian and Schnietz, Mark
and Guth, Karsten and Brökelmann, Michael}, year={2013} }'
chicago: Eichwald, Paul, Walter Sextro, Simon Althoff, Florian Eacock, Mark Schnietz,
Karsten Guth, and Michael Brökelmann. “Influences of Bonding Parameters on the
Tool Wear for Copper Wire Bonding.” In 15th Electronics Packaging Technology
Conference, 2013. https://doi.org/10.1109/EPTC.2013.6745803.
ieee: P. Eichwald et al., “Influences of Bonding Parameters on the Tool Wear
for Copper Wire Bonding,” in 15th Electronics Packaging Technology Conference,
2013.
mla: Eichwald, Paul, et al. “Influences of Bonding Parameters on the Tool Wear for
Copper Wire Bonding.” 15th Electronics Packaging Technology Conference,
2013, doi:10.1109/EPTC.2013.6745803.
short: 'P. Eichwald, W. Sextro, S. Althoff, F. Eacock, M. Schnietz, K. Guth, M.
Brökelmann, in: 15th Electronics Packaging Technology Conference, 2013.'
date_created: 2019-05-13T13:57:49Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/EPTC.2013.6745803
language:
- iso: eng
project:
- _id: '92'
grant_number: 02 PQ2210
name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: 15th Electronics Packaging Technology Conference
status: public
title: Influences of Bonding Parameters on the Tool Wear for Copper Wire Bonding
type: conference
user_id: '210'
year: '2013'
...
---
_id: '9801'
author:
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Waleed
full_name: Al-Ashtari, Waleed
last_name: Al-Ashtari
- 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, Al-Ashtari W, Hemsel T, Sextro W. Leistungs- und Bandbreitensteigerung
von Energy-Harvesting-Generatoren für Energieautarke Systeme. 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; 2013:359-372.'
apa: 'Hunstig, M., Al-Ashtari, W., Hemsel, T., & Sextro, W. (2013). Leistungs-
und Bandbreitensteigerung von Energy-Harvesting-Generatoren für Energieautarke
Systeme. In J. Gausemeier, R. Dumitrescu, F. Rammig, W. Schäfer, & A. Trächtler
(Eds.), 9. Paderborner Workshop Entwurf mechatronischer Systeme (pp. 359–372).
Paderborn: Heinz Nixdorf Institut, Universität Paderborn.'
bibtex: '@inproceedings{Hunstig_Al-Ashtari_Hemsel_Sextro_2013, place={Paderborn},
series={HNI-Verlagsschriftenreihe}, title={Leistungs- und Bandbreitensteigerung
von Energy-Harvesting-Generatoren für Energieautarke Systeme}, booktitle={9. Paderborner
Workshop Entwurf mechatronischer Systeme}, publisher={Heinz Nixdorf Institut,
Universität Paderborn}, author={Hunstig, Matthias and Al-Ashtari, Waleed and Hemsel,
Tobias and Sextro, Walter}, editor={Gausemeier, Jürgen and Dumitrescu, Roman and Rammig,
Franz and Schäfer, Wilhelm and Trächtler, AnsgarEditors}, year={2013}, pages={359–372},
collection={HNI-Verlagsschriftenreihe} }'
chicago: 'Hunstig, Matthias, Waleed Al-Ashtari, Tobias Hemsel, and Walter Sextro.
“Leistungs- Und Bandbreitensteigerung von Energy-Harvesting-Generatoren Für Energieautarke
Systeme.” In 9. Paderborner Workshop Entwurf Mechatronischer Systeme, edited
by Jürgen Gausemeier, Roman Dumitrescu, Franz Rammig, Wilhelm Schäfer, and Ansgar
Trächtler, 359–72. HNI-Verlagsschriftenreihe. Paderborn: Heinz Nixdorf Institut,
Universität Paderborn, 2013.'
ieee: M. Hunstig, W. Al-Ashtari, T. Hemsel, and W. Sextro, “Leistungs- und Bandbreitensteigerung
von Energy-Harvesting-Generatoren für Energieautarke Systeme,” in 9. Paderborner
Workshop Entwurf mechatronischer Systeme, 2013, pp. 359–372.
mla: Hunstig, Matthias, et al. “Leistungs- Und Bandbreitensteigerung von Energy-Harvesting-Generatoren
Für Energieautarke Systeme.” 9. Paderborner Workshop Entwurf Mechatronischer
Systeme, edited by Jürgen Gausemeier et al., Heinz Nixdorf Institut, Universität
Paderborn, 2013, pp. 359–72.
short: 'M. Hunstig, W. Al-Ashtari, T. Hemsel, W. Sextro, 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. 359–372.'
date_created: 2019-05-13T14:02:10Z
date_updated: 2022-01-06T07:04:21Z
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: 359-372
place: Paderborn
publication: 9. Paderborner Workshop Entwurf mechatronischer Systeme
publisher: Heinz Nixdorf Institut, Universität Paderborn
series_title: HNI-Verlagsschriftenreihe
status: public
title: Leistungs- und Bandbreitensteigerung von Energy-Harvesting-Generatoren für
Energieautarke Systeme
type: conference
user_id: '55222'
year: '2013'
...
---
_id: '9802'
abstract:
- lang: eng
text: It has been shown previously that ``slip-slip'' operation of piezoelectric
inertia motors allows higher velocities and smoother movements than classic ``stick-slip''
operation. One very promising driving option is to use a superposition of multiple
sinusoidal signals. In this contribution, previous theoretical results are validated
experimentally. The results confirm the theoretical result that for a given maximum
frequency, usually defined by the actuator characteristics, a signal with high
fundamental frequency and consisting of two superposed sine waves leads to the
highest velocity and the smoothest motion. This result is 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 Slip-Slip Operation of Piezoelectric
Inertia Motors - Experimental Validation. In: Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop. Hannover, Germany; 2013:16-18.'
apa: Hunstig, M., Hemsel, T., & Sextro, W. (2013). High-Velocity Slip-Slip Operation
of Piezoelectric Inertia Motors - Experimental Validation. In Proceedings of
10th International Workshop on Piezoelectric Materials and Applications and 8th
Energy Harvesting Workshop (pp. 16–18). Hannover, Germany.
bibtex: '@inproceedings{Hunstig_Hemsel_Sextro_2013, place={Hannover, Germany}, title={High-Velocity
Slip-Slip Operation of Piezoelectric Inertia Motors - Experimental Validation},
booktitle={Proceedings of 10th International Workshop on Piezoelectric Materials
and Applications and 8th Energy Harvesting Workshop}, author={Hunstig, Matthias
and Hemsel, Tobias and Sextro, Walter}, year={2013}, pages={16–18} }'
chicago: Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “High-Velocity Slip-Slip
Operation of Piezoelectric Inertia Motors - Experimental Validation.” In Proceedings
of 10th International Workshop on Piezoelectric Materials and Applications and
8th Energy Harvesting Workshop, 16–18. Hannover, Germany, 2013.
ieee: M. Hunstig, T. Hemsel, and W. Sextro, “High-Velocity Slip-Slip Operation of
Piezoelectric Inertia Motors - Experimental Validation,” in Proceedings of
10th International Workshop on Piezoelectric Materials and Applications and 8th
Energy Harvesting Workshop, 2013, pp. 16–18.
mla: Hunstig, Matthias, et al. “High-Velocity Slip-Slip Operation of Piezoelectric
Inertia Motors - Experimental Validation.” Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop, 2013, pp. 16–18.
short: 'M. Hunstig, T. Hemsel, W. Sextro, in: Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop, Hannover, Germany, 2013, pp. 16–18.'
date_created: 2019-05-13T14:06:14Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
keyword:
- Piezoelectric inertia motor
- stick-slip motor
- driving signal
- velocity
- smoothness
language:
- iso: eng
page: 16-18
place: Hannover, Germany
publication: Proceedings of 10th International Workshop on Piezoelectric Materials
and Applications and 8th Energy Harvesting Workshop
status: public
title: High-Velocity Slip-Slip Operation of Piezoelectric Inertia Motors - Experimental
Validation
type: conference
user_id: '55222'
year: '2013'
...
---
_id: '9803'
abstract:
- lang: eng
text: Piezoelectric inertia motors, also known as stickslip drives or (smooth) impact
drives, use the inertia of a body to drive it by a friction contact in small steps,
in the majority of motors composed of a stick phase and a slip phase between the
friction partners. For optimizing inertia motors, it is important to understand
the friction contact correctly and to measure its properties appropriately. This
contribution presents experimental set-ups for measuring the contact force, friction
force and relative displacement in an actual inertia motor with a dry friction
contact and numerical simulations of the motor operation. The motor uses a pre-stressed
multilayer actuator with a displacement in the range of 20 $\mu$ m. It is shown
that a previously postulated condition for the applicability of simple kinetic
friction models is well fulfilled for the investigated motor. The friction contact
in the motor is simulated using different kinetic friction models. The input for
the friction models is the measured motion of the rod. The models qualitatively
reproduce the measured motion but show quantitative deviations varying with frequency.
These can be explained by vibrations of the driving rod that are experimentally
investigated.
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. Modelling the friction contact in an inertia
motor. Journal of Intelligent Material Systems and Structures. 2013;24(11):1380-1391.
doi:10.1177/1045389X12474354
apa: Hunstig, M., Hemsel, T., & Sextro, W. (2013). Modelling the friction contact
in an inertia motor. Journal of Intelligent Material Systems and Structures,
24(11), 1380–1391. https://doi.org/10.1177/1045389X12474354
bibtex: '@article{Hunstig_Hemsel_Sextro_2013, title={Modelling the friction contact
in an inertia motor}, volume={24}, DOI={10.1177/1045389X12474354},
number={11}, journal={Journal of Intelligent Material Systems and Structures},
author={Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, year={2013},
pages={1380–1391} }'
chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Modelling the Friction
Contact in an Inertia Motor.” Journal of Intelligent Material Systems and Structures
24, no. 11 (2013): 1380–91. https://doi.org/10.1177/1045389X12474354.'
ieee: M. Hunstig, T. Hemsel, and W. Sextro, “Modelling the friction contact in an
inertia motor,” Journal of Intelligent Material Systems and Structures,
vol. 24, no. 11, pp. 1380–1391, 2013.
mla: Hunstig, Matthias, et al. “Modelling the Friction Contact in an Inertia Motor.”
Journal of Intelligent Material Systems and Structures, vol. 24, no. 11,
2013, pp. 1380–91, doi:10.1177/1045389X12474354.
short: M. Hunstig, T. Hemsel, W. Sextro, Journal of Intelligent Material Systems
and Structures 24 (2013) 1380–1391.
date_created: 2019-05-13T14:08:01Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
doi: 10.1177/1045389X12474354
intvolume: ' 24'
issue: '11'
keyword:
- Actuator
- friction
- motor
- piezoelectric
language:
- iso: eng
page: 1380-1391
publication: Journal of Intelligent Material Systems and Structures
status: public
title: Modelling the friction contact in an inertia motor
type: journal_article
user_id: '55222'
volume: 24
year: '2013'
...
---
_id: '9804'
abstract:
- lang: eng
text: This contribution provides a systematic investigation and performance comparison
of different modes of operation for piezoelectric inertia drives. The movement
of these motors is classically assumed to consist of steps involving stiction
and sliding, resulting in the term ``stick-slip drives''. In the first part of
this contribution it has been found that using ideal driving signals, ``slip-slip''
operation without phases of stiction allows very high velocities, while the maximum
velocity is limited principally in stick-slip operation. In this part it is shown
that slip-slip operation is also suitable for use with real actuators, driven
with frequency-limited versions of the ideal signals presented in part I. The
motional performance of the motor as well as its wear and the required electric
power are investigated for operation with different signals. It is found that
for high velocity inertia motors it is recommendable to use actuators with large
stroke and to drive them with a signal consisting of two harmonics at a high fundamental
frequency, a result that is supported by similar setups implemented experimentally
by other authors. Using Lanczos' \sigma factors to calculate the frequency-limited
excitation signals instead of standard Fourier series additionally increases the
motor performance significantly. The results help motor designers to choose the
appropriate mode of operation and to optimise the motor 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. Stick-slip and slip-slip operation of piezoelectric
inertia drives - Part II: Frequency-limited excitation. Sensors and Actuators
A: Physical. 2013;200:79-89. doi:10.1016/j.sna.2012.11.043'
apa: 'Hunstig, M., Hemsel, T., & Sextro, W. (2013). Stick-slip and slip-slip
operation of piezoelectric inertia drives - Part II: Frequency-limited excitation.
Sensors and Actuators A: Physical, 200, 79–89. https://doi.org/10.1016/j.sna.2012.11.043'
bibtex: '@article{Hunstig_Hemsel_Sextro_2013, title={Stick-slip and slip-slip operation
of piezoelectric inertia drives - Part II: Frequency-limited excitation}, volume={200},
DOI={10.1016/j.sna.2012.11.043},
journal={Sensors and Actuators A: Physical}, author={Hunstig, Matthias and Hemsel,
Tobias and Sextro, Walter}, year={2013}, pages={79–89} }'
chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Stick-Slip and Slip-Slip
Operation of Piezoelectric Inertia Drives - Part II: Frequency-Limited Excitation.”
Sensors and Actuators A: Physical 200 (2013): 79–89. https://doi.org/10.1016/j.sna.2012.11.043.'
ieee: 'M. Hunstig, T. Hemsel, and W. Sextro, “Stick-slip and slip-slip operation
of piezoelectric inertia drives - Part II: Frequency-limited excitation,” Sensors
and Actuators A: Physical, vol. 200, pp. 79–89, 2013.'
mla: 'Hunstig, Matthias, et al. “Stick-Slip and Slip-Slip Operation of Piezoelectric
Inertia Drives - Part II: Frequency-Limited Excitation.” Sensors and Actuators
A: Physical, vol. 200, 2013, pp. 79–89, doi:10.1016/j.sna.2012.11.043.'
short: 'M. Hunstig, T. Hemsel, W. Sextro, Sensors and Actuators A: Physical 200
(2013) 79–89.'
date_created: 2019-05-13T14:09:31Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
doi: 10.1016/j.sna.2012.11.043
intvolume: ' 200'
keyword:
- Inertia motor
language:
- iso: eng
page: 79 - 89
publication: 'Sensors and Actuators A: Physical'
quality_controlled: '1'
status: public
title: 'Stick-slip and slip-slip operation of piezoelectric inertia drives - Part
II: Frequency-limited excitation'
type: journal_article
user_id: '55222'
volume: 200
year: '2013'
...
---
_id: '9805'
abstract:
- lang: eng
text: 'Piezoelectric inertia motors, also known as ``stick--slip drives'''', use
the inertia of a body to drive it in small steps by means of a friction contact.
While these steps are classically assumed to involve stiction and sliding, the
motors can also operate in ``slip--slip'''' mode without any phase of static friction.
This contribution provides a systematic investigation and performance comparison
of different stick--slip and slip--slip modes of operation. Different criteria
for comparing the motional performance of inertia motors are defined: Steady state
velocity, smoothness of motion, and start-up time. Using the example of a translational
inertia motor excited by an ideal displacement signal, it is found that the maximum
velocity reachable in stick--slip operation is limited principally, while continuous
slip--slip operation allows very high velocities. For the investigated driving
signals, the motor velocity is proportional to the square root of the actuator
stroke. The motor performance with these ideal signals defines an upper boundary
for the performance of real 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. Stick-slip and slip-slip operation of piezoelectric
inertia drives - Part I: Ideal Excitation. Sensors and Actuators A: Physical.
2013;200:90-100. doi:10.1016/j.sna.2012.11.012'
apa: 'Hunstig, M., Hemsel, T., & Sextro, W. (2013). Stick-slip and slip-slip
operation of piezoelectric inertia drives - Part I: Ideal Excitation. Sensors
and Actuators A: Physical, 200, 90–100. https://doi.org/10.1016/j.sna.2012.11.012'
bibtex: '@article{Hunstig_Hemsel_Sextro_2013, title={Stick-slip and slip-slip operation
of piezoelectric inertia drives - Part I: Ideal Excitation.}, volume={200}, DOI={10.1016/j.sna.2012.11.012},
journal={Sensors and Actuators A: Physical}, author={Hunstig, Matthias and Hemsel,
Tobias and Sextro, Walter}, year={2013}, pages={90–100} }'
chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Stick-Slip and Slip-Slip
Operation of Piezoelectric Inertia Drives - Part I: Ideal Excitation.” Sensors
and Actuators A: Physical 200 (2013): 90–100. https://doi.org/10.1016/j.sna.2012.11.012.'
ieee: 'M. Hunstig, T. Hemsel, and W. Sextro, “Stick-slip and slip-slip operation
of piezoelectric inertia drives - Part I: Ideal Excitation.,” Sensors and Actuators
A: Physical, vol. 200, pp. 90–100, 2013.'
mla: 'Hunstig, Matthias, et al. “Stick-Slip and Slip-Slip Operation of Piezoelectric
Inertia Drives - Part I: Ideal Excitation.” Sensors and Actuators A: Physical,
vol. 200, 2013, pp. 90–100, doi:10.1016/j.sna.2012.11.012.'
short: 'M. Hunstig, T. Hemsel, W. Sextro, Sensors and Actuators A: Physical 200
(2013) 90–100.'
date_created: 2019-05-13T14:10:34Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
doi: 10.1016/j.sna.2012.11.012
intvolume: ' 200'
keyword:
- Inertia motor
- Stick--slip drive
- Mode of operation
- Performance indicator
- Velocity maximization
- Actuator stroke
language:
- iso: eng
page: 90 - 100
publication: 'Sensors and Actuators A: Physical'
quality_controlled: '1'
status: public
title: 'Stick-slip and slip-slip operation of piezoelectric inertia drives - Part
I: Ideal Excitation.'
type: journal_article
user_id: '55222'
volume: 200
year: '2013'
...
---
_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'
...