کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5008536 | 1461849 | 2016 | 7 صفحه PDF | دانلود رایگان |
- A novel standing wave linear piezoelectric actuator is proposed.
- The longitudinal-bending coupling mode of a beam is proposed and discussed.
- A longitudinal-bending hybrid vibration is generated by one group of PZT elements.
- Oblique elliptical movement is produced on the end tip of a sandwich transducer.
- The prototype achieves maximum no-load speed and force of 891.3Â mm/s and 39.2Â N.
A novel standing wave linear piezoelectric actuator is proposed and tested by using a sandwich transducer operated in longitudinal-bending coupling mode. The vibration mode used in this work is neither longitudinal mode nor bending mode, but a longitudinal-bending hybrid one, which is generated simultaneously by only one group of PZT ceramic elements. The exciting principle of this coupling mode is discussed, and then realized by designing a standing wave piezoelectric actuator. When the 1Â st longitudinal and 3rd bending modes of the transducer have colse resonance frequencies and unsymmetrical boundary condition is applied, the desired longitudinal-bending coupling mode can be generated by a sine signal, which finally produces oblique elliptical movement on the end tip of the transducer. The design and analysis work is accomplished by finite elements method (FEM), and verified by a scanning laser Doppler vibrometer after the fabrication of a prototype. The proposed standing wave linear piezoelectric actuator achieves maximum no-load speed and thrust force of about 891.3Â mm/s and 39.2Â N under voltage of 400Â VP-P and working frequency of 29.4Â kHz.
Journal: Sensors and Actuators A: Physical - Volume 251, 1 November 2016, Pages 119-125