Robust Two-Degree-of-Freedom Control Based on !! Method for PMSM Drive System

(E-pub Ahead of Print)

Author(s): Qixin Zhu*, Lei Xiong, Hongli Liu, Yonghong Zhu, Guoping Zhang.

Journal Name: Recent Advances in Electrical & Electronic Engineering
Formerly Recent Patents on Electrical & Electronic Engineering

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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.

Keywords: permanent magnet synchronous motor; robust control; two-degree-of-freedom

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Article Details

(E-pub Ahead of Print)
DOI: 10.2174/2352096512666190319164237
Price: $95