ANALYSIS OF A NOVEL LONGITUDINAL-BENDING HYBRID ULTRASONIC MOTOR USING VIBRATION COUPLING
A novel longitudinal-bending (L-B) hybrid ultrasonic motor using vibration coupling is proposed.Different with the previous L-B ultrasonic motors,only longitudinal PZT plates are used;and the longitudinal-bending hybrid vibrations of the motor are excited synchronously.Fixed boundary condition is applied on one side surface of the flange,which locates at the wave node of a longitudinal transducer.The working principle of the motor is analyzed.By using finite element method,comparison between the proposed ultrasonic motor with fixed boundary condition and a transducer with free boundary condition are developed by modal analysis,harmonic analysis and transient analysis.It is found that the longitudinal-bending hybrid vibrations can be produced by the longitudinal piezoelectric elements under a fixed boundary condition of the flange.It should be noted that the bending vibration is not generated by the bending piezoelectric elements,but excited by a vibration coupling effect under an unsymmetrical boundary condition.The change of the boundary condition also shows minute effects on the resonance frequency and the electromechanical coupling factor.Oblique elliptical movements are formed on the two end tips of the transducer.These motions can push the runners linearly by frictional forces if preloads are applied.
Ultrasonic motor Longitudinal vibration Bending vibration Vibration coupling Boundary condition
Ying-xiang LIU Chun-hong LI Wei-shan CHEN Xiu-hua NI Jun-kao LIU
State Key Laboratory of Robotics and System, Harbin Institute of Technology, No.92, West Da-Zhi Stre Shanghai Radio Equipment Research Institute, Shanghai, 200090, P.R.China
国际会议
The 2015 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2015全国压电和声波理论及器件技术研讨会)
济南
英文
45-49
2015-10-30（万方平台首次上网日期，不代表论文的发表时间）