针对电控转向系统功能安全设计的驾驶员模型设计及应用  

Design and Application of a Driver Model for Functional Safety in Electric Control Steering Systems

作　　者：杨文畅 余颖弘 杨永锋 邹波 车佳黎 YANG Wenchang;YU Yinghong;YANG Yongfeng;ZOU Bo;CHE Jiali(China Automotive Engineering Research Institute Co.,Ltd.,Chongqing 401122,China;Chongqing University,Chongqing 400044,China)

机构地区：[1]中国汽车工程研究院股份有限公司,重庆401122 [2]重庆大学,重庆400044

出　　处：《汽车工程学报》2024年第S1期66-73,共8页Chinese Journal of Automotive Engineering

基　　金：国家重点研发计划项目(2023YFB2504505):乘用车智能线控一体化底盘关键技术及产业化。

摘　　要：针对电控助力转向系统功能安全设计中关键设计参数的确定取决于专家经验而缺乏数据支撑的问题,提出了可以设置故障注入与驾驶员特性的“人-车-路”仿真系统,便于在虚拟环境中高效、便捷地生成基础数据,并具备校验设计的合理性。重点研究了驾驶员模型的设计方法,针对传统转向角度驾驶员模型仅配置反应时间的问题,提出转向力矩控制模块便于设置不同类型驾驶员的负荷极限。然后,针对提出的转向力矩控制驾驶员模型,改造CarSim接口并且外置转向助力特性模块,构建可以设置EPS助力故障与方向盘力矩上限的“人-车-路”系统。最后,通过Simulink与CarSim联合仿真,证明了转向力矩控制驾驶员模型功能的正确性与“人-车-路”仿真系统功能安全设计应用的可行性。Determining key design parameters in the functional safety design of electronic control steering systems often relies on expert experience and lacks data support.Therefore,this paper proposes a humanvehicle-road system that allows for the setting of fault injection and driver characteristics,facilitating the efficient and convenient generation of basic data and the verification of design rationality in a virtual environment.This study focuses on the design method of driver models.To address the limitation of traditional driver steering models,which only configure reaction time,a steering torque control module is proposed to facilitate the setting of load limits for different types of drivers.In the proposed driver model for steering torque control,the CarSim interface was modified and an external steering assist characteristic module was installed to construct a human-vehicle-road system capable of setting EPS assist faults and steering wheel torque limits.Finally,the joint simulation of Simulink and CarSim prove the correctness of the proposed driver model for steering torque control and the feasibility of applying the human-vehicle-road system for functional safety design.

关 键 词：电控助力转向系统 功能安全 驾驶员模型 转向力矩控制 “人-车-路”仿真系统 

分 类 号：U462.2[机械工程—车辆工程]