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Research on Leakage Fault Diagnosis and its Simulation for Control Valve of Mixed Gas

The leak tightness of control valve may be broken more easily with high flow rate, so this paper considers a control valve of mixed gas as the research object to establish a mathematical model of leakage fault on results of a study on the mechanism of leakage faults. We obtain a method of extracting fault symptom through a simulation test of fault in order to form the foundation for a system of intelligent fault diagnosis and detection (IFDD) for the control valve.