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汽车安全与节能学报

汽车安全与节能学报 ›› 2023, Vol. 14 ›› Issue (1): 69-79.DOI: 10.3969/j.issn.1674-8484.2023.01.009

• 智能驾驶与智慧交通 • 上一篇    下一篇

面向智能车辆的EMB系统功能安全分析及应用设计

程洁1(), 郑凯1, 秦嘉2, 吴晓东1,*()   

  1. 1.上海交通大学 机械与动力工程学院，上海 200240，中国
    2.上海大陆汽车制动系统有限公司，上海 201821，中国
  • 收稿日期:2022-05-23 修回日期:2022-11-09 出版日期:2023-02-28 发布日期:2023-03-07
  • 通讯作者: 吴晓东
  • 作者简介:*吴晓东，副教授。E-mail: xiaodongwu@sjtu.edu.cn。
    程洁（1998—），女(汉)，安徽，硕士研究生。E-mail：cheng_jie@sjtu.edu.cn。

Functional safety analysis and application design of EMB system for intelligent vehicles

CHENG Jie1(), ZHENG Kai1, QIN Jia2, WU Xiaodong1,*()   

  1. 1. School of Mechanical, Shanghai Jiao-Tong University, Shanghai 200240, China
    2. Continental Brake Systems (Shanghai), Shanghai 201821, China
  • Received:2022-05-23 Revised:2022-11-09 Online:2023-02-28 Published:2023-03-07
  • Contact: WU Xiaodong

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摘要：

为提高电子机械制动（EMB）系统的可靠性，基于ISO 26262标准，开展EMB系统功能安全分析及设计。面向智能驾驶车辆，进行相关项定义；应用危害分析和风险评估（HARA）方法论，得到汽车安全完整性等级（ASIL）和系统安全目标，并建立系统安全机制，通过故障树（FTA）模型进行安全验证，实现安全目标的逐层分解；基于EMB系统安全机制搭建失效控制模块，设计制动力重构算法并利用联合仿真模型进行系统验证。结果表明：该系统设计方案同时满足应用于智能车辆的EMB系统的功能需求和安全需求。

关键词: 智能车辆, 电子机械制动（EMB）系统, 功能安全, 冗余设计, 线控制动, 汽车安全完整性等级 (ASIL)

Abstract:

The functional safety analysis and design of electronic mechanical brake (EMB) system were carried out to improve the reliability of the EMB system based on ISO 26262 standard. Item definition was defined in terms of intelligent vehicles; The hazard analysis and risk assessment (HARA) methodology was applied to obtain the automotive safety integrity level (ASIL) and the system safety goals. By establishing the system safety mechanism, the fault tree (FTA) model was used for safety verification, and the safety goals were decomposed by layers. The failure control module was built based on the safety mechanism of the EMB system. The braking force reconstruction algorithm was designed and the co-simulation model was used to verify the system. The results show that the designed system can meet both functional and safety requirements of the EMB system applied to intelligent vehicles.

Key words: intelligent vehicles, electronic mechanical brake (EMB) system, functional safety, redundant design, brake-by-wire, automotive safety integrity level (ASIL)

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