航天器五自由度对接试验台动力学特性仿真

Dynamic Characteristics Simulation for Spacecraft Docking Five-Freedom Test Table

建立可靠完整的动力学模型是制定航天器五自由度对接试验台方案的理论基础。对航天器对接试验台的动力学建模问题进行了研究,建立了接触点的动态变约束方程、对接碰撞力模型,并应用牛顿-欧拉方法提出了五自由度下捕获阶段运动学模型。用MATLAB编写了捕获阶段的动力学仿真程序。给出了主、被动试验台运动范围及运动特性、作用力范围等仿真结果,为航天器五自由度对接试验台的实现方案提供了重要设计依据及参考。

Building complete and reliable model is the theory foundation for the design of spacecraft docking five-freedom test table. The dynamic model of spacecraft docking test table was studied. The equations with dynamic constrain in contact point and contact force model during the docking process were built, and five-freedom kinematic model of capturing process was built by Newton-Euler method. Dynamics simulation program in capturing stage was written by MATLAB. The simulation provided the results about relative parameters of active and inactive docking test tables, such as the motion range, the motion characteristic and the acting forces etc. All these provided the important design foundation and reference for spacecraft docking five-freedom test table.