Design and Simulation Analysis of Electric Drive Emergency Release System for Landing Gear Lock Mechanism

Abstract

In order to meet the needs of aircraft multi-electric development, an electric drive emergency release system was designed for the upper gear lock mechanism of a certain type of aircraft landing gear. Firstly, the mechanical equilibrium equation of the upper lock mechanism was established and theoretical analysis was carried out. Based on LMS Virtual. Lab/Motion and AMESim software, the dynamic models of the emergency lock release system of the landing gear and the electric drive system under different braking modes were established respectively, and the joint simulation was further realized. Finally, the effect of different braking modes on electric drive emergency release system was discussed in detail. The results show that the electric drive actuator of the short-circuit brake system, where the brushless DC motor drives the ball screw to unlock the upper lock and realizes the emergency unlock function, possesses the best driving effect. The analysis results provide theoretical support for the design of electric drive actuators of aircraft landing gear emergency system.