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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Active Vibration Control of Rotating Machinery Using Piezoelectric Actuators Incorporating Flexible Casing Effects

[+] Author and Article Information
T. S. Barrett, A. B. Palazzolo

Department of Mechanical Engineering, Texas A & M University, College Station, TX 77840

A. F. Kascak

U.S. Army at NASA Lewis Research Center, Cleveland, OH 44135

J. Eng. Gas Turbines Power 117(1), 176-187 (Jan 01, 1995) (12 pages) doi:10.1115/1.2812770 History: Received March 10, 1993; Online November 19, 2007

Abstract

The modern trend toward lighter and more flexible designs in rotating machinery brings with it increasing demands for ways to dissipate the excess energy transferred to such structures by the action of dynamic forces. The present study incorporates the use of active feedback control mechanisms to suppress this unwanted vibration. The basic active damping scheme involves the introduction of a control force on the structure from a feedback network whose input is dictated by the motion of the structure. The control force is applied to the rotor bearing support housing via a piezoelectric actuator attached to the rotor casing. The current research extends previous electromechanical simulations by incorporating a flexible finite element shell model of the casing to support the actuator and sensors. Actuator and feedback loop dynamics are included in the stability and response simulation.

Copyright © 1995 by The American Society of Mechanical Engineers
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