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Title

Saturation control of a piezoelectric actuator for fast settling-time performance

Author(s)

Zheng, Jinchuan;  Fu, Minyue

Abstract

This brief studies fast tracking control of piezoelectric (PZT) actuators. Adverse effects associated with the PZT actuators typically include the nonlinear dynamics of hysteresis and saturation and the linear vibrational dynamics. To eliminate the loss of performance due to these effects, we propose a new control scheme for the PZT actuators. It consists of a combined feedforward/feedback compensator for hysteresis and resonance compensation and a nested switching controller (NSC) that optimizes a quadratic performance cost function involving the actuator saturation. The NSC not only can guarantee the system stability in the presence of saturation but also can improve the tracking speed by efficiently allocating the control efforts. The experimental results on an actual PZT nanopositioner show that the new control scheme outperforms the conventional control by more than 12% in settling time within the full PZT operational range and with nanoscale precision.

Publication type

Journal article

Research centre

Swinburne University of Technology

Source

IEEE Transactions on Control Systems Technology, Vol. 21, no. 1 (Jan 2013), pp. 220-228

Publication year

2013

FOR Code(s)

0102 Applied Mathematics;  0906 Electrical and Electronic Engineering

Keyword(s)

Actuator saturation;  Hysteresis;  Motion control;  Piezoelectric actuators;  Switching control

Publisher

IEEE

ISSN

1063-6536

Publisher URL

http://dx.doi.org/10.1109/tcst.2011.2177463

Copyright

Copyright © 2011 IEEE. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Full text

Peer reviewed