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Pressure Estimation and Pressure Control of Hydraulic Control Unit in Electric-Wheel Vehicle

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  • Zhao Xiangyang
  • Xu Wen-bo
  • Gang Liu

Abstract

In order to improve the braking performance and safety performance of electric vehicles driven by a hub motor, the cylinder pressure estimation and pressure control of its hydraulic braking system are studied. In this paper, a mathematical model is established for the solenoid valve, a key component of the hydraulic actuator, and the hydraulic and electrical characteristics of the solenoid valve are studied. A state equation is established for the solenoid valve, and the square root volume Kalman filter (SRCKF) algorithm is used to estimate the solenoid valve spool position. The brake fluid flow and brake wheel cylinder pressure are calculated based on the spool position. Finally, a solenoid valve spool position control algorithm based on sliding mode variable structure algorithm is designed, and the brake pressure in the brake wheel cylinder is controlled by adjusting the spool position. Matlab/Simulink-AMESim software simulation and hardware-in-the-loop were used to verify the algorithm. Simulation results show that the brake cylinder pressure can be estimated accurately, and the pressure control algorithm can accurately follow the control target value.

Suggested Citation

  • Zhao Xiangyang & Xu Wen-bo & Gang Liu, 2020. "Pressure Estimation and Pressure Control of Hydraulic Control Unit in Electric-Wheel Vehicle," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-14, July.
    • Handle: RePEc:hin:jnlmpe:6576297
    DOI: 10.1155/2020/6576297
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    Cited by:

    1. Yu Yang & Chao Wang & Shujun Yang & Xianzhi Tang, 2022. "Study on Top Hierarchy Control Strategy of AEBS over Regenerative Brake and Hydraulic Brake for Hub Motor Drive BEVs," Energies, MDPI, vol. 15(22), pages 1-17, November.

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