考虑铰间隙的折叠翼展开机构展开过程碰撞动力学仿真分析

Simulation Analysis on Collision Dynamics in the Course of Unfolding with Consideration of Hinge Gap in the Unfolding Unit of Foldable Wing

基于"二状态模型"的非线性等效弹簧阻尼模型,建立折叠翼展开机构的铰间隙碰撞模型,利用ADAMS软件对折叠翼展开机构的展开过程动力学进行仿真分析,包括间隙大小和间隙摩擦在折叠翼展开机构展开过程中引起的碰撞力变化规律。结果表明,在折叠翼展开机构整个展开过程中,由于间隙的影响,产生随机持续的碰撞力;随着间隙增大,碰撞次数减少,碰撞力幅值有增大的趋势;摩擦加快系统能量的损耗,一定程度上抑制了间隙碰撞次数和展开机构动力学扰动效应。

A non-linear equivalent spring-damper model based on the ＂two-state model＂, by creation of a collision model for hinge gap in the unfolding mechanism of the folding wings and by application of ADAMS software, the dynamics of the unfolding mechanism of the folding wing during its spreading process is simulated to explore the changing rule on the aroused collision force during the spreading process of the unfolding mechanism of folding wings. It has been proved that, during whole spreading process of the unfolding mechanism of the folding wing, due to the impact of the gap, a random and continuous collision force will be generated, the collision force has a tendency to increase as the number of collisions is reduced. Friction can speed up the energy loss in the system and in some extent it will restrain the number of gap collisions and disturbance effects in terms of the dynamics of the unfolding mechanism.