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Proceedings Paper

Control of a hysteretic actuator using inverse hysteresis compensation
Author(s): William S. Galinaitis; Robert C. Rogers
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Paper Abstract

The accurate control of a system that exhibits hysteresis requires a control strategy that incorporates some form of compensation for the hysteresis. One approach is to develop an accurate model P of the hysteresis and then use the inverse P-1 as a compensator (inverse compensation). This paper focuses on the problem of determining P and P-1 for a piezoelectric stack actuator. The KP operator is used to formulate the hysteresis operator P and from this an approximation Pm is derived. Compensation is then defined in terms of the inverse of the approximation, Pm-1. Experimental data collected on an unloaded piezoelectric stack actuator is used to demonstrate the concept of inverse compensation. The parameters of Pm are identified using only major hysteresis loop data and results are given that show Pm provides an accurate model for both major and minor hysteresis loops. Results are then presented that demonstrate the capability of the inverse Pm-1 to compensate for the actuator hysteresis.

Paper Details

Date Published: 24 July 1998
PDF: 11 pages
Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); doi: 10.1117/12.316308
Show Author Affiliations
William S. Galinaitis, Virginia Polytechnic Institute and State Univ. (United States)
Robert C. Rogers, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 3323:
Smart Structures and Materials 1998: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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