Research on Fault Modeling and Simulation of Electric Control Valve

As the executive terminal of industrial production instructions, the failure of electric control valve will seriously affect the performance of the control system. In order to study the fault diagnosis algorithm of electric control valve, the mathematical models of motor, transmission mechanism and valve of electric control valve are deduced based on mechanism analysis, and the Simulink simulation model of electric control valve is built by using modular modeling method and verified on the semi-physical test platform. On this basis, the fault models of internal leakage and external leakage of the electric control valve are established, and compared with the corresponding fault simulation results of the semi-physical test platform to verify the accuracy and effectiveness of the fault model.