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《Automation & Information Engineering》 2013-01
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Precise Speed Control of AC Servo Motor Based on Extended State Observer

Cheng Guoqing1 Hu Jingao2 (1. Department of Logistics Management, Xiamen University Tan Kah Kee College 2. College of Electrical Engineering and Automation, Fuzhou University)  
A control scheme is proposed to achieve accurate speed regulation in AC motor servo systems with unknown load disturbance. The scheme is based on the mathematical model of the position-speed loop in permanent magnet synchronous motor (PMSM) servo system, with the motor angular position as the only measurable feedback signal. An extended state observer is adopted to estimate the un-measured state (speed) and the unknown load disturbance for control and compensation. The asymptotic stability of the speed control system is analyzed theoretically. MATLAB simulation and experimental tests using the TMS320F2812 have been conducted, and the results verify that the servo system is capable of tracking the target speed smoothly and accurately in the face of load disturbance. The control scheme can be easily applied to relevant servo systems.
【Fund】: 福建省自然科学基金(2012J01258)
【CateGory Index】: TM383.4
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