飞机起落架协调收放功能耦合建模与可靠性优化设计OA

We carry out reliability optimization design for the coordinated retraction-extension function of the landing gear hydraulic system.It addresses the harsh landing condition of aircraft after high-altitude,low-temperature and long-endurance cruising,and solves the engineering problems of insufficient reliability in left-right coordinated retraction-extension of landing gear and asymmetric failure caused by low-temperature medium characteristics.Based on the AMESim-MATLAB parametric joint simulation platform,we establish a reliability analysis model with series failure modes considering timeliness and symmetry.It completes the reliability evaluation and sensitivity analysis of the coordinated retraction-extension function of the landing gear hydraulic system for a certain aircraft.We take the maximization of the comprehensive reliability of the coordinated retraction-extension function as the optimization objective.It constructs a multi-constrained reliability optimization model that includes retraction-extension timeliness constraint,action symmetry constraint and parameter engineering constraint to realize the optimal matching of design parameters.Results show that the comprehensive reliability of the coordinated retraction-extension function of the landing gear hydraulic system is improved from 0.6520 to 0.9801 after optimization,which meets the design threshold requirement.The retraction-extension timeliness and action symmetry are both significantly improved.The proposed method provides theoretical support for the reliability design,parameter matching and maintenance support of complex aerospace electromechanical-hydraulic systems.