In-Situ Identification of Active Magnetic Bearing System Using Directional Frequency Response Functions

[+] Author and Article Information
Chong-Won Lee

Center for Noise and Vibration Control (NOVIC), Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Science Town, Taejon, 305-701, Korea

Young-Ho Ha

Daewoo Precision Industries LTD., Pusan, Korea

Chee-Young Joh

Agency for Defence Development, Chinhae, Korea

Cheol-Soon Kim

Samsug Advanced Institute of Technology, Suwon, Korea

J. Dyn. Sys., Meas., Control 118(3), 586-592 (Sep 01, 1996) (7 pages) doi:10.1115/1.2801184 History: Received January 13, 1995; Online December 03, 2007


Complex modal testing is employed to obtain the directional frequency responses of a four-axis active magnetic bearing system. In the test, magnetic bearings are used as exciters while the system is in operation. The directional frequency response estimates are then used to effectively identify the parameters of the active magnetic bearing system. Experimental results show that the directional frequency response function, which is properly defined in the complex domain, is a powerful tool for identification of bearing as well as modal parameters of the system.

Copyright © 1996 by The American Society of Mechanical Engineers
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