Comparison Study of Error Patterns of Intermittent Open and Short Circuit Connection Faults in CAN Network

Controller area network (CAN) is a widely applied protocol in vehicle communication systems. However, the intermittent connection(IC) faults, which repetitively and randomly occur in the CAN network due loose connections, cable aging and insulation wearing, will worsen the system performance and cause system level failures. Hence, effective detection and accurate diagnosis of the IC fault in CAN network is of great importance for system health management. However, the systematic study of different IC fault types in CAN network has not been thoroughly studied. By simulating the open-circuit IC fault and short-circuit IC fault in CAN network on the industrial testbed, this paper studied the patterns of the errors induced by different IC faults. The feature parameter distribution of the two types of IC faults is studied, and the performance differences of the two types of IC faults on CAN bus are analyzed. The results show different IC faults in CAN network demonstrated differentiable error patterns, which can be used to develop further methodology for fault diagnosis and isolation.