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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2008, Vol. 9 Issue (1): 58-64    DOI: 10.1631/jzus.A071146
Civil and Mechanical Engineering     
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
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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.

Key words： Ultrasonic motor (USM)      Hammerstein model      Dead-zone      Nonlinearity      Identification     
Received: 21 March 2007      Published: 25 November 2007
CLC:  TM32  
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Xin-liang ZHANG
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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.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A071146     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2008/V9/I1/58

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