---
_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. <i>Journal of Intelligent Material Systems and Structures</i>. 2013;24(11):1380-1391.
    doi:<a href="https://doi.org/10.1177/1045389X12474354">10.1177/1045389X12474354</a>
  apa: Hunstig, M., Hemsel, T., &#38; Sextro, W. (2013). Modelling the friction contact
    in an inertia motor. <i>Journal of Intelligent Material Systems and Structures</i>,
    <i>24</i>(11), 1380–1391. <a href="https://doi.org/10.1177/1045389X12474354">https://doi.org/10.1177/1045389X12474354</a>
  bibtex: '@article{Hunstig_Hemsel_Sextro_2013, title={Modelling the friction contact
    in an inertia motor}, volume={24}, DOI={<a href="https://doi.org/10.1177/1045389X12474354">10.1177/1045389X12474354</a>},
    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.” <i>Journal of Intelligent Material Systems and Structures</i>
    24, no. 11 (2013): 1380–91. <a href="https://doi.org/10.1177/1045389X12474354">https://doi.org/10.1177/1045389X12474354</a>.'
  ieee: M. Hunstig, T. Hemsel, and W. Sextro, “Modelling the friction contact in an
    inertia motor,” <i>Journal of Intelligent Material Systems and Structures</i>,
    vol. 24, no. 11, pp. 1380–1391, 2013.
  mla: Hunstig, Matthias, et al. “Modelling the Friction Contact in an Inertia Motor.”
    <i>Journal of Intelligent Material Systems and Structures</i>, vol. 24, no. 11,
    2013, pp. 1380–91, doi:<a href="https://doi.org/10.1177/1045389X12474354">10.1177/1045389X12474354</a>.
  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: '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. <i>Sensors and Actuators A: Physical</i>.
    2013;200:90-100. doi:<a href="https://doi.org/10.1016/j.sna.2012.11.012">10.1016/j.sna.2012.11.012</a>'
  apa: 'Hunstig, M., Hemsel, T., &#38; Sextro, W. (2013). Stick-slip and slip-slip
    operation of piezoelectric inertia drives - Part I: Ideal Excitation. <i>Sensors
    and Actuators A: Physical</i>, <i>200</i>, 90–100. <a href="https://doi.org/10.1016/j.sna.2012.11.012">https://doi.org/10.1016/j.sna.2012.11.012</a>'
  bibtex: '@article{Hunstig_Hemsel_Sextro_2013, title={Stick-slip and slip-slip operation
    of piezoelectric inertia drives - Part I: Ideal Excitation.}, volume={200}, DOI={<a
    href="https://doi.org/10.1016/j.sna.2012.11.012">10.1016/j.sna.2012.11.012</a>},
    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.” <i>Sensors
    and Actuators A: Physical</i> 200 (2013): 90–100. <a href="https://doi.org/10.1016/j.sna.2012.11.012">https://doi.org/10.1016/j.sna.2012.11.012</a>.'
  ieee: 'M. Hunstig, T. Hemsel, and W. Sextro, “Stick-slip and slip-slip operation
    of piezoelectric inertia drives - Part I: Ideal Excitation.,” <i>Sensors and Actuators
    A: Physical</i>, 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.” <i>Sensors and Actuators A: Physical</i>,
    vol. 200, 2013, pp. 90–100, doi:<a href="https://doi.org/10.1016/j.sna.2012.11.012">10.1016/j.sna.2012.11.012</a>.'
  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: '9576'
abstract:
- lang: eng
  text: 'In neurosurgery, delineation of tumor boundaries during resection of brain
    tumors is of substantial relevance. During operation distinction between tumor
    and healthy tissue rely on the abilities of the surgeon based on visual and tactile
    differentiation. In this paper a high sensitivity actuator-sensor system using
    a piezoelectric bimorph is presented. Frequency shift and transfer function of
    the bimorphpsilas voltages are detected and evaluated. Sensorpsilas sensitivity
    is evaluated using two frequency controls strategies: A phase-locked loop (PLL)
    and a self-oscillating circuit. Results of measurements conducted on gel-phantoms
    are presented and discussed.'
author:
- first_name: David Oliva
  full_name: Uribe, David Oliva
  last_name: Uribe
- first_name: Ralf
  full_name: Stroop, Ralf
  last_name: Stroop
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Jörg
  full_name: Wallaschek, Jörg
  last_name: Wallaschek
citation:
  ama: 'Uribe DO, Stroop R, Hemsel T, Wallaschek J. Development of a biomedical tissue
    differentiation system using piezoelectric actuators. In: <i>Frequency Control
    Symposium, 2008 IEEE International</i>. ; 2008:91-94. doi:<a href="https://doi.org/10.1109/FREQ.2008.4622963">10.1109/FREQ.2008.4622963</a>'
  apa: Uribe, D. O., Stroop, R., Hemsel, T., &#38; Wallaschek, J. (2008). Development
    of a biomedical tissue differentiation system using piezoelectric actuators. In
    <i>Frequency Control Symposium, 2008 IEEE International</i> (pp. 91–94). <a href="https://doi.org/10.1109/FREQ.2008.4622963">https://doi.org/10.1109/FREQ.2008.4622963</a>
  bibtex: '@inproceedings{Uribe_Stroop_Hemsel_Wallaschek_2008, title={Development
    of a biomedical tissue differentiation system using piezoelectric actuators},
    DOI={<a href="https://doi.org/10.1109/FREQ.2008.4622963">10.1109/FREQ.2008.4622963</a>},
    booktitle={Frequency Control Symposium, 2008 IEEE International}, author={Uribe,
    David Oliva and Stroop, Ralf and Hemsel, Tobias and Wallaschek, Jörg}, year={2008},
    pages={91–94} }'
  chicago: Uribe, David Oliva, Ralf Stroop, Tobias Hemsel, and Jörg Wallaschek. “Development
    of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.”
    In <i>Frequency Control Symposium, 2008 IEEE International</i>, 91–94, 2008. <a
    href="https://doi.org/10.1109/FREQ.2008.4622963">https://doi.org/10.1109/FREQ.2008.4622963</a>.
  ieee: D. O. Uribe, R. Stroop, T. Hemsel, and J. Wallaschek, “Development of a biomedical
    tissue differentiation system using piezoelectric actuators,” in <i>Frequency
    Control Symposium, 2008 IEEE International</i>, 2008, pp. 91–94.
  mla: Uribe, David Oliva, et al. “Development of a Biomedical Tissue Differentiation
    System Using Piezoelectric Actuators.” <i>Frequency Control Symposium, 2008 IEEE
    International</i>, 2008, pp. 91–94, doi:<a href="https://doi.org/10.1109/FREQ.2008.4622963">10.1109/FREQ.2008.4622963</a>.
  short: 'D.O. Uribe, R. Stroop, T. Hemsel, J. Wallaschek, in: Frequency Control Symposium,
    2008 IEEE International, 2008, pp. 91–94.'
date_created: 2019-04-29T13:07:39Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1109/FREQ.2008.4622963
keyword:
- biomedical measurement
- brain
- cancer
- neurophysiology
- phantoms
- phase locked loops
- piezoelectric actuators
- surgery
- tactile sensors
- transfer functions
- tumours
- PLL
- biomedical tissue differentiation system
- brain tumor resection
- frequency control
- frequency shift
- gel-phantom
- high sensitivity actuator-sensor system
- neurosurgery
- phase-locked loop
- piezoelectric actuators
- piezoelectric bimorph
- self-oscillating circuit
- sensor sensitivity
- tactile differentiation
- tactile sensor system
- transfer function
- tumor boundary
- visual differentiation
- Biomedical measurements
- Circuits
- Frequency control
- Neoplasms
- Neurosurgery
- Phase locked loops
- Piezoelectric actuators
- Surges
- Transfer functions
- Voltage
language:
- iso: eng
page: 91-94
publication: Frequency Control Symposium, 2008 IEEE International
publication_identifier:
  issn:
  - 1075-6787
quality_controlled: '1'
status: public
title: Development of a biomedical tissue differentiation system using piezoelectric
  actuators
type: conference
user_id: '55222'
year: '2008'
...