Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of ISMA 2016 |
| Subtitle of host publication | International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics |
| Editors | Paul Sas, David Moens, Axel van de Walle |
| Pages | 1605-1613 |
| Number of pages | 9 |
| ISBN (electronic) | 9789073802940 |
| Publication status | Published - 2016 |
| Event | 27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016 - Leuven, Belgium Duration: 19 Sept 2016 → 21 Sept 2016 |
Publication series
| Name | Proceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics |
|---|
Abstract
For driving ultrasonic motors, it is often required to control the resonant frequency of a transducer between some mode shapes or numbers for example, some of them are driven with combined vibration of longitudinal and bending modes, and the shift of the resonant frequency degrades their performance. As the source of this shift, the boundary condition's change and the nonlinear effect during the high power driving should be taken into account. To overcome this problem, this study proposes a dynamic control system of the resonant frequency modification by connecting FETs to the additional piezoelectric parts differently from the driving piezoelectric part. By switching on and off the FETs, the electric boundary condition for the additional piezoelectric parts changes between shorten and open conditions. Generally, the resonant frequencies under these conditions have the relationship of fshorten < fopen because of the piezoelectric effect. By switching the FETs with the same frequency as the driving frequency, the resonant frequency could be modified as a function of the duty ratio.
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Mechanics of Materials
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
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Proceedings of ISMA 2016: International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics. ed. / Paul Sas; David Moens; Axel van de Walle. 2016. p. 1605-1613 (Proceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Dynamic control of transducer's resonant frequency via the controlling of electric terminal
AU - Yokozawa, H.
AU - Twiefel, Jens
AU - Weinstein, Michael
AU - Morita, T.
PY - 2016
Y1 - 2016
N2 - For driving ultrasonic motors, it is often required to control the resonant frequency of a transducer between some mode shapes or numbers for example, some of them are driven with combined vibration of longitudinal and bending modes, and the shift of the resonant frequency degrades their performance. As the source of this shift, the boundary condition's change and the nonlinear effect during the high power driving should be taken into account. To overcome this problem, this study proposes a dynamic control system of the resonant frequency modification by connecting FETs to the additional piezoelectric parts differently from the driving piezoelectric part. By switching on and off the FETs, the electric boundary condition for the additional piezoelectric parts changes between shorten and open conditions. Generally, the resonant frequencies under these conditions have the relationship of fshorten < fopen because of the piezoelectric effect. By switching the FETs with the same frequency as the driving frequency, the resonant frequency could be modified as a function of the duty ratio.
AB - For driving ultrasonic motors, it is often required to control the resonant frequency of a transducer between some mode shapes or numbers for example, some of them are driven with combined vibration of longitudinal and bending modes, and the shift of the resonant frequency degrades their performance. As the source of this shift, the boundary condition's change and the nonlinear effect during the high power driving should be taken into account. To overcome this problem, this study proposes a dynamic control system of the resonant frequency modification by connecting FETs to the additional piezoelectric parts differently from the driving piezoelectric part. By switching on and off the FETs, the electric boundary condition for the additional piezoelectric parts changes between shorten and open conditions. Generally, the resonant frequencies under these conditions have the relationship of fshorten < fopen because of the piezoelectric effect. By switching the FETs with the same frequency as the driving frequency, the resonant frequency could be modified as a function of the duty ratio.
UR - http://www.scopus.com/inward/record.url?scp=85018177555&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85018177555
T3 - Proceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics
SP - 1605
EP - 1613
BT - Proceedings of ISMA 2016
A2 - Sas, Paul
A2 - Moens, David
A2 - van de Walle, Axel
T2 - 27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016
Y2 - 19 September 2016 through 21 September 2016
ER -