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.
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Project supported by the National Natural Science Foundation of China (No. 60572055) and the Natural Science Foundation of Guangxi Province (No. 0339068), China
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Zhang, Xl., Tan, Yh. Modelling of ultrasonic motor with dead-zone based on Hammerstein model structure. J. Zhejiang Univ. Sci. A 9, 58–64 (2008). https://doi.org/10.1631/jzus.A071146
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DOI: https://doi.org/10.1631/jzus.A071146