The invention discloses a safety control module for an electric power steering control system. The safety control module is provided with two independent electronic control units with the same structure and function. During normal work, the two electronic control units control motors of the electric power steering control systems on the two sides to conduct power output through the cooperation module according to an instruction of a first electronic control unit. In case of failure, a second electronic control unit is switched to control the output of the motors on two sides or the second electronic control unit controls the output of the motor on one side; redundant control signals are transmitted between the two electronic control units through hard wire connection. The invention furtherdiscloses a safety control method for the electric power steering control system. According to the invention, the interrupt response and fault confirmation time can be reduced in terms of function safety, and the reliability is improved while the system response time is greatly shortened.
本发明公开了一种用于电动助力转向控制系统安全控制模块,具有两路独立且结构和功能完全相同的电子控制单元;正常工作时,两路电子控制单元通过协同模块以第一电子控制单元的指令控制两侧电动助力转向控制系统电机进行助力输出;失效时,切换到第二电子控制单元控制两侧电机输出或第二电子控制单元控制单侧电机输出;其中,两路电子控制单元之间采用硬线连接传输冗余控制信号。本发明还公开了一种用于电动助力转向控制系统安全控制方法。本发明在功能安全上能降低了中断响应和故障确认时间,大大缩短系统响应时间的同时增加可靠性。
Safety control module and safety control method
安全控制模块及安全控制方法
2020-08-07
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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