刚柔耦合二级运动调整系统动力学模型

安装在悬挂馈源舱内的Stewart平台作为馈源位姿精调系统与舱索粗调系统一起构成了大型射电望远镜馈源位姿的二级耦合调整系统．综合柔性悬索系统的非线性有限元结构动力学方程和刚性Stewart平台的多体系统动力学方程，构造了悬索粗调系统与Stewart平台精调系统的刚柔耦合动力学模型，找到了分析动力学耦合问题的有效方法．通过对LT50m缩比模型的仿真分析，模拟了馈源舱对Stewart平台扰动的响应，并由实验进行了验证．

Analysis of the dynamic model of a rigid-flexible coupled two-level kinetic tuning system

The two level coupled tuning system of feed of the large radio telescope(LT) is composed of a Stewart fine tuning platform mounted in the suspended feed cabin and the cable-cabin coarse tuning system. By combining the dynamic equation for the structural nonlinear finite element of a cable system with that for the multibody system of the Stewart platform, the dynamic model of the rigid-flexible coupled two-level kinematic tuning system is constructed, which is an efficient method to analyze the coupled dynamic problem. The response of the cabin to the movement of the Stewart platform is simulated with the application of the model to the LT50m scaled model, and its results are validated by the experiment. The research serves as a foundation for designing the mass ratio of Stewart to cabin to eliminate the effect of the Stewart platform adjustment on the cabin.