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�������պ����ѧѧ�� 2007, Vol. 33 Issue (03) :315-318    DOI:
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Fuzzy-PID double mode control of ultra-precision AC servo syst em
Lu Zesheng, Zhang Qiang*
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China

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Abstract�� It is difficult to establish mathematical mode for AC servo system , because it has several disadvantages, such as parameters varying as time, load disturbing, motor being non-linear, and so on. Fuzzy control need not establis h the mathematical mode of controlled plant, but steady state precision is bad. A fuzzy-PID double mode controller was presented, which combined fuzzy controlle r and PID controller. Different controller was adopted in different domain, so th e double mode controller combined the advantages of fuzzy controller and PID con t roller, and get rid of the disadvantages of them. The double mode controller is easy to realize. Experiment results show that the fuzzy-PID double mode controller reduces settling time by 33.7% without overshooting and decreases tra cking error by 47.2% in comparison to standard PID controller.
Keywords�� fuzzy control   PID control   double mode control   AC se rvo system     
Received 2006-04-04;
About author: ¬����(1940-),��,�ӱ�������,����,lzesn@hit.edu.cn.
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¬����, ��ǿ.�߾��Ƚ����ŷ�ϵͳ��ģ��PID˫ģ����[J]  �������պ����ѧѧ��, 2007,V33(03): 315-318
Lu Zesheng, Zhang Qiang.Fuzzy-PID double mode control of ultra-precision AC servo syst em[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(03): 315-318
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