Frequency Domain Control of Flexible Beams With Piezoelectric Actuator

[+] Author and Article Information
S. M. Yang, Y. C. Liu

Institute of Aeronautics and Astronautics, National Cheng Kung University, Taiwan

J. Dyn. Sys., Meas., Control 117(4), 541-546 (Dec 01, 1995) (6 pages) doi:10.1115/1.2801112 History: Received September 14, 1993; Online December 03, 2007


One of the challenges in structural control is to apply successfully the control law derived from a discrete, reduced-order model to the engineering system of much higher order. Spillover associated with discrete system modeling has been known to lead to closed loop system instability. This paper presents a frequency domain stability criterion for the high/low-authority controller design of flexible beam systems in distributed parameter model. It is shown that the poles of a slewing beam system can be categorized in two groups: one from those of a cantilever beam and the other from those of a high-authority control slewing beam. Stability analysis can thus be conducted in each group independently. Application of piezoelectric actuator is shown to be effective in the vibration control of a slewing beam system. Neither distributed sensing/estimation nor functional gain calculation is required. Furthermore, the spillover problem can be prevented.

Copyright © 1995 by The American Society of Mechanical Engineers
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