Simulation and analysis of hydraulic driven faults in rotating airplane cabin doors

As one of the hydraulic control systems of an aircraft, the hydraulic drive system of the aircraft cabin door can cause severe impact on the safe operation of the plane once failed. In order to enhance the safety and reliability of the hydraulic drive system of the aircraft cabin door, this paper takes the rotary hydraulic drive system of the aircraft cabin door as the research object, and analyzes its working principle. Additionally, five types of potential failures are summarized, including gain reduction fault in angular displacement sensors, blockage fault in flow control valves, air pollution fault, leakage fault in motor plungers, and motor plunger failure fault. Using the AEMSim software to establish a fault simulation model, the fault characteristics of the system under various fault conditions can be studied, which can effectively reduce the cost of physical simulation and testing, improve design efficiency and provide simulation data for other research.