吴坷 李超 杜佳 高海龙 陈玉龙

摘  要：随着汽车电子的高速发展，辅助驾驶系统已经开始大量普及，并已经开始逐步下探到十万元左右的在售车型之中。辅助驾驶系统，主要是指随着智能化的应用，辅助驾驶员驾驶，系统自动执行部分动态驾驶任务，有效的降低驾驶员驾驶强度，提升驾驶品质。典型的如自适应巡航系统（ACC）、车道保持辅助系统（LKA）、自动紧急制动系统（AEB）和高速公路辅助系统（HWA）。其中高速公路辅助系统（HWA）直接对车辆进行横纵向组合控制，目前功能安全国际标准（ISO 26262）在驾驶辅助系统中的涉及横纵向控制的功能，在概念阶段的涉及应用没有统一有效的方法。本文以HWA为例阐述详细的功能安全概念阶段的设计方法、和分析过程，包含相关项定义，危害分析、安全目标导出和功能安全概念。此方法已经在东风汽车高级驾驶辅助系统的功能安全开发中应用，为后续的高级驾驶辅助系统的功能开发提供一定的方法指导。

关键词：功能安全;高速驾驶辅助;相关项定义;危害缝隙与风险评估;功能安全概念

中图分类号：U471       文献标识码：A       文章编号：1005-2550（2022）02-0070-12

The Function Safety Concept Design of Highway Assisted

Driving based on ISO 26262

WU Ke1， LI Chao2，DU Jia1， GAO Hai-long2， CHEN Yu-long2

（1. Dongfeng Motor Company Technology Center， Wuhan 430058， China; 2. Xiangyang Daan Automobile Test Center CO. LTD， Xiangyang 441004， China）

Abstract： With the rapid development of automotive electronics， assisted driving systems have begun to spread in large numbers， and have gradually dropped to about 100，000 yuan among the models on sale. Assisted driving system mainly refers to the application of intelligence to assist the driver in driving. The system automatically performs some dynamic driving tasks， effectively reducing the driving intensity of the driver and improving the driving quality. Typical such as adaptive cruise system （ACC）， lane keeping assist system （LKA）， automatic emergency braking system （AEB） and highway assist system （HWA）. Among them， the highway assistance system （HWA） directly performs the lateral and the longitudinal combined control of the vehicle. The current international functional safety standard （ISO 26262） involves the function of the lateral and the longitudinal control in the driving assistance system， and there is no unified and effective method for the application in the concept stage. This article takes HWA as an example to explain the detailed design method and analysis process of the functional safety concept stage， including the definition of related items， hazard analysis， safety goal derivation and functional safety concept. This method has been applied in the functional safety development of Dongfeng Motor's automatic driving assistance system， providing certain method guidance for the subsequent development of automatic driving assistance functions.

Key Words： Function Safety; Highway Assist; Item Definition; Hazard Analysis And Risk Assessment; Functional Safety Concept

汽車自动化及自动驾驶是汽车行业未来发展的趋势，虽然完全意义上的自动驾驶汽车还没有走入普通人的生活，但是综合了自适应速度控制、自动紧急制动、高速驾驶辅助、拥堵辅助等多种辅助功能的汽车已经出现在市场上了，这使得半自主驾驶在量产车型上成为现实[1]。

1    ISO 26262概念階段的主要活动……