汽车工程 ›› 2022, Vol. 44 ›› Issue (9): 1425-1436.doi: 10.19562/j.chinasae.qcgc.2022.09.014

所属专题: 底盘&动力学&整车性能专题2022年

• • 上一篇    下一篇

紧急制动工况下的纵向车速估计方法

曾小华1,钱琦峰1,2,宋大凤1(),高皓铭1,2,吴佳俊1   

  1. 1.吉林大学,汽车仿真与控制国家重点实验室,长春  130000
    2.吉林大学重庆研究院,重庆  400000
  • 收稿日期:2022-04-02 修回日期:2022-04-26 出版日期:2022-09-25 发布日期:2022-09-21
  • 通讯作者: 宋大凤 E-mail:songdf@jlu.edu.cn
  • 基金资助:
    重庆自然科学基金(cstc2021jcyj-msxmX0934)

Estimation Method of Longitudinal Vehicle Speed Under Emergency Braking Condition

Xiaohua Zeng1,Qifeng Qian1,2,Dafeng Song1(),Haoming Gao1,2,Jiajun Wu1   

  1. 1.Jilin University,State Key Laboratory of Automotive Simulation and Control,Changchun  130000
    2.Jilin University,Chongqing Research Institute,Chongqing  400000
  • Received:2022-04-02 Revised:2022-04-26 Online:2022-09-25 Published:2022-09-21
  • Contact: Dafeng Song E-mail:songdf@jlu.edu.cn

摘要:

针对车辆紧急制动失稳状态下4个车轮均出现较大滑移而不能从车轮转速反映纵向车速的问题,提出一种与滑移控制器相结合的纵向车速估计方法。该方法能直接影响车轮滑移控制逻辑,保证4个车轮中始终存在一个车轮处于弱制动力控制状态且保持转速稳定变化,从而在紧急制动工况下能较准确地估计出纵向车速。在高/低附着路面的直行和转向工况下仿真的结果验证了滑移控制器的制动效能和纵向车速估计算法的鲁棒性。

关键词: 紧急制动, 纵向车速估计, 滑移控制器

Abstract:

In view of that the rotational speed of wheel can no longer reflect the longitudinal speed of vehicle due to the large slip of all four wheels in the vehicle state of emergency braking, an estimation method of vehicle longitudinal speed combined with a slip controller is proposed. The method can directly influence the control logic of wheel slip to ensure there always exist one of the four wheels staying at the state of weak braking force control and maintain the stable change of speed, and hence enabling the accurate estimation of longitudinal vehicle speed in emergency braking conditions. The results of simulations under the both straight driving and curve turning conditions on both high and low adhesive roads verify the braking efficacy of slip controller and the robustness of estimation method of vehicle longitudinal speed.

Key words: emergency braking, longitudinal vehicle speed estimation, slip controller