Research On Fault Modeling And Diagnosis Of Microcomputer Interlock System In Railway Signals

The computer control system is widely used in industry control, traffic transport, space technology and so on. The high security, reliability and haleness are required in these systems, Since a few failures can make the losses of huge economy and human beings, thereby the developers, consumers and relational departments think much of the fault analysis, diagnosis and prevention.The HJ04A system is an indemnity of the railway transport. As the developer, the microcomputer research institute of hefei university of technology has put in many researchers and much time on this system's fault research. In fortunately. I participate in this project, and do some job of the system's faults analysis, diagnosis and other thing.The paper introduces the concept of fail-safe, the hardware and software's frame, divides the faults into some classes, and lists some general faults. I introduce the principle of reliability, fault forecast and it's standards firstly. Secondly, I analyze the FMEA/CA, Fault tree, Event tree and Markov models in detail, deepen its theory and describe the flows of these models. And then, we introduce the fault diagnosis expert system and the K layers of BP neural network, and bring forward a hierarchical structure graph. At last, we list some instances of the above-described models and fault diagnosis.