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Structured Control of an Electric Power Steering System

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  • Hongbo Zhou
  • Aiping Pang
  • Jing Yang
  • Zhen He

Abstract

Electric power steering (EPS) systems are prone to oscillations because of a very small phase angle margin, so a stable controller is required to increase the stability margin. In addition, the EPS system has parameter disturbances in the gain of the torque map under different conditions, which requires a certain degree of robustness in the control design. This paper synthesizes the multidimensional performance requirements considering the stability margin, robustness, and bandwidth of the system to form an optimization matrix with multidimensional performance output in using the structured control design. The structured controller not only retains the characteristics of traditional controllers with excellent robust performance and high stability margin but also has a lower order, which can be better applied in practice. Based on the performance requirements of the system and practical implementation, the structured controllers with different orders were designed, and the feasibility of the structured controller was confirmed through comparison and theoretical analysis.

Suggested Citation

  • Hongbo Zhou & Aiping Pang & Jing Yang & Zhen He, 2020. "Structured Control of an Electric Power Steering System," Complexity, Hindawi, vol. 2020, pages 1-9, July.
    • Handle: RePEc:hin:complx:9371327
    DOI: 10.1155/2020/9371327
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