基于容错技术的六通道ABS系统设计

Design of Six Channel ABS System with Fault Tolerant Technology

采用容错技术,通过2个MCU之间的CAN通讯的消息应答机制,设计了具有容错功能的六通道ABS系统。2个MCU同时接收和处理来自车轮传感器的轮速信号和故障诊断信号。如果主控MCU处于正常工作状态的时候,另一个MCU则处于备用状态,且实时地通过CAN总线和主控进行通讯,对其进行监控。如果主控MCU处于故障状态的时候,备用MCU立即接替主控MCU进行工作,以提高六通道ABS系统的可靠性。

The paper design the six channels ABS system with the fault tolerant technology,which is realized fault tolerant function by message response mechanism of CAN communication between the two MCU.The two MCU receive and process the speed signal and fault diagnosis signal which is come from the wheel speed sensor.If main control MCU is good,the other MCU is in the standby state.At the same time,the main control MCU and standby MCU are communicated by CAN bus timely and inspect each other.If main control MCU is in fault,the standby MCU is work to substitute the main control MCU immediately.The paper proposed design method improvement the reliability of six channels ABS system.