汽车工程 ›› 2023, Vol. 45 ›› Issue (1): 32-41.doi: 10.19562/j.chinasae.qcgc.2023.01.004

所属专题: 智能网联汽车技术专题-控制2023年

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基于自适应采样时间MPC的自动紧急制动系统

刘永涛1,2,刘传攀1,刘湘安1,陈轶嵩1,乔洁1()   

  1. 1.长安大学汽车学院,西安 710064
    2.中电科(宁波)海洋电子研究院有限公司,宁波 315000
  • 收稿日期:2022-07-12 修回日期:2022-08-19 出版日期:2023-01-25 发布日期:2023-01-18
  • 通讯作者: 乔洁 E-mail:qiaojie@chd.edu.cn
  • 基金资助:
    国家重点研发计划项目(2021YFB2501202);陕西省科技重大专项(2020zdzx06-01-01);陕西省重点研发计划项目(2022GY-303);中央高校基本科研业务项目(300102222113)

Automatic Emergency Braking System Based on Model Predictive Control with Adaptive Sampling Time

Yongtao Liu1,2,Chuanpan Liu1,Xiangan Liu1,Yisong Chen1,Jie Qiao1()   

  1. 1.School of Automobile,Chang’an University,Xi’an 710064
    2.CETC Ningbo Maritime Electronics Research Institute Co. ,Ltd. ,Ningbo 315000
  • Received:2022-07-12 Revised:2022-08-19 Online:2023-01-25 Published:2023-01-18
  • Contact: Jie Qiao E-mail:qiaojie@chd.edu.cn

摘要:

针对传统AEB系统控制过程中缺乏对舒适性考虑以及控制精度较差等问题,提出了一种考虑多目标的模型预测控制(MPC)策略。首先,通过引入模糊规则计算场景工况的紧急系数,并基于此设计自适应采样时间MPC上层控制器,接着采用PID反馈控制与逆发动机模型设计下层控制器,最后通过PreScan与Simulink联合平台进行仿真试验,并进一步在实车试验平台上验证。结果表明,基于本文策略的AEB系统在两种典型场景、多种运行工况下均能避撞成功,加速度变化率始终位于舒适区间,最终车间距离为1.74~4.18 m,能确保车辆自动紧急制动过程中的舒适性与有效性。

关键词: 自动紧急制动系统, MPC, 模糊控制, 舒适性

Abstract:

In this paper, a multi-objective MPC control strategy is proposed to solve the problems of lack of comfort consideration and poor control accuracy in the control process of traditional AEB system. Firstly, the emergency coefficients of the scenarios are calculated by introducing in the fuzzy rules, and an adaptive MPC controller is designed based on the fuzzy rules. Then the lower controller is designed by using the PID feedback control and inverse engine model. Finally, the simulation test is carried out through PreScan and Simulink joint platform. The results show that the AEB system based on the proposed strategy can successfully avoid collision under two typical scenarios and various working conditions, with the acceleration change rate always in the comfort range. The final distance between the two vehicles is 1.74~4.18 m, which can ensure the comfort and effectiveness of the vehicle during the automatic emergency braking process.

Key words: automatic emergency braking system, MPC, fuzzy control, comfort