[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.6113/JPE.2010.10.4.382

Improvement in Control Performance of a Servo System Compensating Bandwidth Variations at Low Speed

Ji, Young-Eun (Dept. of Automation & Control Research, Hyundai Heavy Industries)
Park, Je-Wook (School of Electrical Eng., Pusan National University)
Hwang, Seon-Hwan (School of Electrical Eng., Pusan National University)
Baek, Kwang-Ryul (School of Electrical Eng., Pusan National University)
Kim, Jang-Mok (School of Electrical Eng., Pusan National University)

Publication Information

Journal of Power Electronics / v.10, no.4, 2010 , pp. 382-387 More about this Journal

Abstract

This paper presents a novel design method for determining the PID gains of a speed controller for a servo system compensating variations in bandwidth at a low speed. The variations in bandwidth of a speed controller are measured at a low speed and the relationship between the bandwidth and the damping ratio are verified by determining the location of the closed loop pole. The proposed algorithm uses the z-transform of a plant and speed controller and applies the time-varying sampling method for determining the PID gains of the speed controller at low speed. The magnitude and the phase condition are considered for finding a suitable control gain. The usefulness and effectiveness of the proposed method is demonstrated through experimental results such as low speed control and robust disturbance responses.

Keywords

Bandwidth variation; Low speed; PID gains;

Citations & Related Records

Times Cited By Web Of Science : 0 (Related Records In Web of Science)
Times Cited By SCOPUS : 0

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