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Neuro-fuzzy speed tracking control of traveling-wave ultrasonic motor drives using direct pulsewidth modulation

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3 Author(s)
Chau, K.T. ; Univ. of Hong Kong, China ; Chung, S.W. ; Chan, C.C.

The traveling-wave ultrasonic motor (TWUM) drive offers many distinct advantages but suffers from severe system nonlinearities and parameter variations, especially during speed control. This paper presents a new speed tracking control system for the TWUM drive, which newly incorporates neuro-fuzzy control and direct pulsewidth modulation to solve the problem of nonlinearities and variations. The proposed control system is digitally implemented by a low-cost digital-signal-processor-based microcontroller, hence reducing the system hardware size and cost. Experimental results confirm that the proposed speed tracking controller can offer good steady-state and transient performance.

Published in:

Industry Applications, IEEE Transactions on  (Volume:39 ,  Issue: 4 )

Date of Publication:

July-Aug. 2003

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