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Automotive Engineering ›› 2022, Vol. 44 ›› Issue (1): 82-93.doi: 10.19562/j.chinasae.qcgc.2022.01.011

Special Issue: 底盘&动力学&整车性能专题2022年

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Research on Redundant Anti-lock Braking Algorithm Based on eBooster

Xiaohui Liu,Liangyao Yu(),Sheng Zheng,Zhenghong Lu,Jian Song   

  1. Tsinghua University,State Key Laboratory of Automotive Safety and Energy,Beijing  100084
  • Received:2021-08-25 Revised:2021-10-26 Online:2022-01-25 Published:2022-01-21
  • Contact: Liangyao Yu E-mail:yly@tsinghua.edu.cn

Abstract:

A semi-decoupled electronic booster (eBooster) with a pedal push rod is autonomously developed and the precise control is applied on the hydraulic pressure of eBooster based on variable gain PID control algorithm. When the antilock-braking system (ABS) of vehicle fails, the hydraulic pressure of brake master cylinder is actively adjusted based on eBooster through the estimation and monitoring of all the state variables of vehicle. A redundant ABS control algorithm is proposed based on sliding mode control with achieving the function of redundant ABS as requirements and enhancing braking strength and comfort as objectives. The mathematical models of complete vehicle, tires, eBooster, wheel braking cylinders and redundant ABS are constructed with simulations conducted, and the eBooster-based redundant ABS control algorithm is verified on test vehicle Haval 6. The results indicate that the eBooster-based redundant ABS control algorithm can well achieve the function of redundant ABS and enhance the safety of vehicle on the premise of ensuring braking strength and comfort.

Key words: redundant ABS, eBooster, sliding mode control, braking strength, ride comfort