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Improved Backstepping Control with Nonlinear Disturbance Observer for the Speed Control of Permanent Magnet Synchronous Motor

  • Xu-Dong Liu
  • Ke Li
  • Cheng-Hui Zhang
Original Article

Abstract

This paper investigates the speed regulation problem of permanent magnet synchronous motor (PMSM) drive based on backstepping control and nonlinear disturbance observer. By introducing the backstepping control, the single-loop controller is designed instead of the traditional cascade structure, in which, speed and current controller are combined together by recursive design. However, the standard backstepping control method cannot achieve a satisfying behavior in the presence of the disturbance and parameter uncertainties. Unlike the existing adaptive backstepping control method, a nonlinear disturbance observer is designed to estimate the lump disturbance, which includes the matched and mismatched disturbance in the system. Through disturbance estimation and feed-forward compensation, the robustness of the controller is improved effectively. The stability of the system is also proved. Finally, simulation and experiment are implemented with real-time interface (RTI) based on dSPACE. Compared with PI control method, the proposed composite backstepping controller has fast transient response and strong robustness for all disturbance in various conditions.

Keywords

PMSM Backstepping control Mismatched disturbance Nonlinear disturbance Observer 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant 61703222 and Grant 61573223, and by the China Postdoctoral Science Foundation under Grant 2018M632622.

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Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  1. 1.College of AutomationQingdao UniversityQingdaoChina
  2. 2.School of Control Science and EngineeringShandong UniversityJinanChina

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