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Proceedings Paper

Intelligent control of piezoelectric actuators for precision manufacturing
Author(s): Chi-Man Kwan; Roger Xu; Jun Lang; C. Lin; Mark W. Stevenson; Yan Lin; Zhubing Ren; Leonard S. Haynes
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Paper Abstract

We had a contract from Navy in 1997 to work on the control of piezoelectric actuators. The controller consists of two loops: feedforward and feedback. The feedforward loop consists of a Fuzzy CMAC controller, which is used to compensate hysteresis nonlinearity. Fuzzy CMAC is a new type of neural net developed by Intelligent Automation Incorporated. It has a learning speed that is an order of magnitude faster than conventional multilayer perceptron neural nets. The advantage of feedforward control is that it can increase the system response speed without interfering with the system stability. We used a PID controller in the feedback loop because the feedforward compensation may have some residual errors and having a PID controller in the loop will help to reduce the error even further. In our experiment, we operate an actuator manufactured by Burleigh Instruments in the region of 100 Hz whereas the actuator resonance peak is about 1 kHz. Experimental results showed our approach can achieve excellent linearity.

Paper Details

Date Published: 20 August 1999
PDF: 10 pages
Proc. SPIE 3833, Intelligent Systems in Design and Manufacturing II, (20 August 1999); doi: 10.1117/12.359513
Show Author Affiliations
Chi-Man Kwan, Intelligent Automation, Inc. (United States)
Roger Xu, Intelligent Automation, Inc. (United States)
Jun Lang, Intelligent Automation, Inc. (United States)
C. Lin, Intelligent Automation, Inc. (United States)
Mark W. Stevenson, Intelligent Automation, Inc. (United States)
Yan Lin, Intelligent Automation, Inc. (United States)
Zhubing Ren, Intelligent Automation, Inc. (United States)
Leonard S. Haynes, Intelligent Automation, Inc. (United States)

Published in SPIE Proceedings Vol. 3833:
Intelligent Systems in Design and Manufacturing II
Bhaskaran Gopalakrishnan; San Murugesan, Editor(s)

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