Qixin Zhu*, Lei Xiong, Hongli Liu, Yonghong Zhu and Guoping Zhang Pages 496 - 506 ( 11 )
Background: The conventional method using one-degree-of-freedom (1DOF) controller for Permanent Magnet Synchronous Motor (PMSM) servo system has the trade-off problem between the dynamic performance and the robustness.Methods: In this paper, by using !∞ control theory, a novel robust two-degree-of-freedom (2DOF) controller has been proposed to improve the position control performance of PMSM servo system. Using robust control theory and 2DOF control theory, a !∞ robust position controller has been designed and discussed in detail. Results: The trade-off problem between the dynamic performance and robustness which exists in one-degree-of-freedom (1DOF) control can be dealt with by the application of 2DOF control theory. Then, through !∞ control theory, the design of robust position controller can be translated to !∞ robust standard design problem. Moreover, the control system with robust controller has been proved to be stable. Conclusion: Further simulation results demonstrate that compared with the conventional PID control, the designed control system has better robustness and attenuation to the disturbance of load impact.
PMSM, robust control, two-degree-of-freedom, !∞ control, position controller, one-degree-of-freedom.
School of Mechanical Engineering Suzhou University of Science and Technology, Suzhou 215009, School of Electrical and Automation Engineering East China Jiaotong University, Nanchang 330013, , School of Mechanical Engineering Suzhou University of Science and Technology, Suzhou 215009, School of Mechanical and Electronic Engineering Jingdezhen Ceramic Institute, Jingdezhen 333001, Shenzhen Han`s Motor Technology Company Limited, Shenzhen 518058