On-Line Controller Implementation for Attenuation of Synchronous and Transient Rotor Vibration

[+] Author and Article Information
P. S. Keogh, C. R. Burrows, T. Berry

School of Mechanical Engineering, University of Bath, Bath BA2 7AY, U.K.

J. Dyn. Sys., Meas., Control 118(2), 315-321 (Jun 01, 1996) (7 pages) doi:10.1115/1.2802320 History: Received March 03, 1994; Revised May 09, 1995; Online December 03, 2007


A study is presented in which the vibrations of a rotor are controlled under both synchronous and transient conditions. A Fourier decomposition of the rotor vibration during successive synchronous cycles is performed and the fundamental amplitude component is monitored. An analysis of the component response is developed and a strategy is proposed for the rotor vibration control. This is based around a gain matrix derived for a steady-state open-loop controller and the loop is then closed in a form of generalized integral control using a single feedback parameter. Performance and stability characteristics are investigated and for a linear system it is shown that the control of transient vibration caused by sudden mass loss from a rotor is possible. Limitations are stated if the system becomes nonlinear. Multiprocessor hardware is used for on-line implementation of the controller algorithm to an experimental rig, consisting of a rotor supported by two journal bearings with a magnetic control actuator. The results show the effectiveness of the vibration control, which is evaluated over the stable operating range of the controller.

Copyright © 1996 by The American Society of Mechanical Engineers
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