基于功能安全的电驱转向控制系统设计

Design of Electric Driver Steering Control System Based on Functional Safety

根据农业自动导航系统应用场景和电驱转向控制系统的故障和失效问题,结合ISO26262功能安全标准,梳理系统功能安全目标,分解细化功能安全目标,制定了电驱转向控制系统的安全控制策略。使用F28M35H22C为主控制器,设计了基于功能安全的架构和监控机制,包括程序流监控、电流采样及监控、通信安全、热安全、位置传感器监控机制。提出了安全控制策略,满足农业自动耕种需求,对电控单元在农业自动化领域和永磁同步电机在其他领域的应用具有研究意义和应用价值。

According to the application scenarios of agricultural automatic navigation system and failures of the electric drive steering control system,combined with the ISO26262 functional safety standard,decomposed and refined the functional safety objectives,and formulated the safety control strategy of the electric drive steering control system.Using F28M35H22C as the main controller,a functional safety-based architecture and monitoring mechanism were designed,including program flow monitoring,current sampling and monitoring,communication safety,thermal safety,and position sensor monitoring mechanism.A safety control strategy was proposed to meet the needs of automatic farming in agriculture,which has research significance and application value for the application of electronic control units in the field of agricultural automation and other fields using permanent magnet synchronous motors.