Modelling of ultrasonic motor with dead-zone based on Hammerstein model structure
Xin-liang ZHANG, Yong-hong TAN
Department of Automation, School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; Laboratory of Intelligent Systems and Control Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Abstract The ultrasonic motor (USM) possesses heavy nonlinearities which vary with driving conditions and load-dependent characteristics such as the dead-zone. In this paper, an identification method for the rotary travelling-wave type ultrasonic motor (RTWUSM) with dead-zone is proposed based on a modified Hammerstein model structure. The driving voltage contributing effect on the nonlinearities of the RTWUSM was transformed to the change of dynamic parameters against the driving voltage. The dead-zone of the RTWUSM is identified based upon the above transformation. Experiment results showed good agreement between the output of the proposed model and actual measured output.
Xin-liang ZHANG, Yong-hong TAN. Modelling of ultrasonic motor with dead-zone based on Hammerstein model structure. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(1): 58-64.
Chong Li, Cun-yue Lu, Yi-xin Ma, Shi-yang Li, Wei-qing Huang. Design of an ultrasonic motor with multi-vibrators[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2016, 17(9): 724-732.
