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RESEARCH PAPERS

Active Control of Transient Rotordynamic Vibration by Optimal Control Methods

[+] Author and Article Information
A. B. Palazzolo, R. R. Lin, R. M. Alexander

Texas A&M University, Department of Mechanical Engineering, College Station, TX 77843

A. F. Kascak

NASA Lewis Research Center, Cleveland, OH 44135

J. Eng. Gas Turbines Power 111(2), 264-270 (Apr 01, 1989) (7 pages) doi:10.1115/1.3240246 History: Received January 01, 1988; Online October 15, 2009

Abstract

Although considerable effort has been put into the study of steady-state vibration control, there are few methods applicable to transient vibration control of rotor-bearing systems. In this paper optimal control theory has been adopted to minimize rotor vibration due to sudden imbalance, e.g., blade loss. The system gain matrix is obtained by choosing the weighting matrices and solving the Riccati equation. Control forces are applied to the system via a feedback loop. A seven mass rotor system is simulated for illustration. A relationshp between the number of sensors and the number of modes used in the optimal control model is investigated. Comparisons of responses are made for various configurations of modes, sensors, and actuators. Furthermore, spillover effect is examined by comparing results from collocated and noncollocated sensor configurations. Results show that shaft vibration is significantly attenuated in the closed-loop system.

Copyright © 1989 by ASME
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