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Ultrasonic motor servo-drive with online trained neural-network model-following controller

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3 Author(s)
F. -J. Lin ; Dept. of Electr. Eng., Chung Yuan Christian Univ., Chung Li, Taiwan ; W. -J. Hwang ; R. -J. Wai

An ultrasonic servomotor (USM) drive with an online trained neural network model-following controller is proposed. First, the driving circuit for the USM, which is a two-phase chopper-inverter combination is introduced. Since the dynamic characteristics of the USM are difficult to obtain and the motor parameters are time varying, an online trained neural network model-following controller is proposed to control the rotor position of the USM. An accurate tracking response can be obtained by random initialisation of the weights and biases of the network owing to the powerful online learning capability. Moreover, the influences of parameter variations and external disturbances of the USM drive can be effectively reduced by the neural network controller

Published in:

IEE Proceedings - Electric Power Applications  (Volume:145 ,  Issue: 2 )