IMPACT OF GAIN-PHASE MARGINS ON THE DELAY MARGIN FOR STABILITY OF DC MOTOR SPEED CONTROL SYSTEM WITH TIME DELAYS
HAKAN GÜNDÜZ
Department of Electrical and Electronics Engineering, Nigde University, Nigde, 51240, Turkey
SAFFET AYASUN *
Department of Electrical and Electronics Engineering, Nigde University, Nigde, 51240, Turkey
*Author to whom correspondence should be addressed.
Abstract
This paper presents a comprehensive stability analysis of a DC motor speed control system with communication delays. A direct and exact analytical method is proposed to compute stability delay margins that take into account gain and phase margins. The method is based on the elimination of exponential terms in the characteristic equations. The time-domain simulation studies indicate that the proposed schemes give better desired dynamic performance as compared to the recently developed schemes for DC motor speed control system with communication delays.
Keywords: Control design, delay systems, delay margin, DC motor control, gain and phase margins