线缆驱动的直升机起落架落震仿真研究

Simulation Study on Drop Vibration of Helicopter Landing Gear Driven by Cable

针对传统起落架姿态调节能力较差、运动空间有限、难以适应复杂地形的问题,设计了一种线缆驱动的能够自主调节姿态的自适应起落架,创建了自适应起落架的虚拟样机模型,并模拟起落架在无动力自由落体方式着陆的极限工况,进行了落震仿真试验分析。以无人机机身落震缓冲效率为主要性能指标,通过改变该起落架缓冲部位的刚度系数及阻尼系数,采用系统功量法研究了起落架缓冲器参数与缓冲效率的关系,为缓冲器的设计提供了理论依据。

Aiming at the problems of poor attitude adjustment ability,limited movement space and difficulty in adapting to complex terrain of traditional landing gear,this paper designs a cable driven adaptive landing gear with autonomous attitude adjustment,creates a virtual prototype model of adaptive landing gear,and simulates the limit conditions of landing gear in unpowered free fall mode.The landing simulation test analysis is carried out.Taking the UAV fuselage shock damping efficiency as the main performance index,by changing the stiffness coefficient and damping coefficient of the landing gear buffer part,the relationship between the landing gear buffer parameters and the buffer efficiency is studied using the system work method,which provides a theoretical basis for the buffer design.