Multi-Fault Analysis of Aircraft Main Landing Gear Retraction Hydraulic System

Aiming at the common health performance influencing factors of the aircraft’s main landing gear retracting hydraulic system, based on its hydraulic structure, the landing gear retracting control AMESim hydraulic system model is established to carry out the study of the typical faults of the aircraft landing gear retracting hydraulic system, such as injection of the hydraulic pump internal leakage, hydraulic oil contamination, and leakage of the actuator cylinder. The curve diagrams of the simulation results are analyzed, and the conclusions of the influence of typical faults on the boundary conditions on the pressure and flow of the hydraulic system are drawn. The results of the simulation are analyzed, and the effect of typical fault boundary conditions on the pressure and flow of the hydraulic system is concluded, which provides a reference for the study of parameter optimization, fault analysis, and health management of the landing gear in engineering applications.