基于ISO 26262的车道偏离预警系统设计

Design of lane departure warning system based on ISO 26262

为了实现车道偏离预警系统(LDWS)在参与汽车辅助驾驶时的安全功能,按照道路车辆功能安全ISO 26262标准定制了系统的设计流程。根据车道偏离预警系统的安全目标和整车对其功能安全的要求,对系统架构进行了分层设计,并对安全子系统进行详细设计。在此基础上,基于TMS320DM8168对车道偏离预警系统的硬件和软件进行了安全设计规范开发,最后对系统的设计及规范进行检验。结果表明,该系统符合ISO 26262功能安全标准的要求,能实现整车的安全目标。

To implement the safety function of LDWS （lane departure warning system） in the process of vehicle assistant driving, the design flow of the system was drafted according to the road vehicles functional safety standard ISO 26262. In combi- nation of LDWS security target and its functional safety demands, the hierarchical design for the system architecture was con- ducted, and the security subsystems were designed in detail. On this basis, the safety design specification for hardware and soft- ware of LDWS was developed with TMS320DM8168. The system design and specification were tested. The test results show this system meets the requirements of functional safety standard ISO 26262, and can achieve the safety target of the vehicles.