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TECHNICAL BRIEFS

A Reduced Order Time-Delay Control for Highly Simplified Brushless DC Motor

[+] Author and Article Information
Pyung H. Chang, Suk-Ho Park

Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-gu, Taejon, Korea

Jung-Hoon Lee

Missile Actuation Systems Division, Agency for Defense Development, P.O. Box 35 4-2-5, Yusong-gu, Taejon, Korea

J. Dyn. Sys., Meas., Control 121(3), 556-560 (Sep 01, 1999) (5 pages) doi:10.1115/1.2802514 History: Received August 25, 1997; Online December 03, 2007

Abstract

A reduced order time-delay control is derived and applied to the position control of a brushless DC motor with a highly simplified hardware configuration: use of six-step commutation without current control unit. In addition, the closed-loop stability has been analyzed by using the singular perturbation method. Throughout experimental studies, it is observed that reduced order time delay control effectively compensates for parameter variations and non-linearities, which a conventional PID control cannot handle with adequate performances. This result shows that reduced order time-delay control enables an economical design without compromising performance. More importantly, the example establishes a case that: a good control method can compensate for the hardware deficiency in a given plant, and as a result it even enables a simpler design of plants at the design stage.

Copyright © 1999 by The American Society of Mechanical Engineers
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