航天器缠绕肋天线缠绕过程动力学建模与仿真

Dynamics Modeling and Simulation of Wrapping Process for Spacecraft Wrapped-rib Antenna

航天器缠绕肋天线缠绕过程,涉及柔性大变形与大范围运动的耦合、阻尼因素影响,以及缠绕肋条与中心毂接触碰撞等动力学问题,是获取缠绕肋天线展开特性的重要输入。文章应用空间绝对节点坐标法对缠绕肋天线建模,基于比例阻尼模型推导了阻尼力对绝对坐标列阵的雅克比矩阵,建立了缠绕肋条与中心毂的刚柔耦合系统接触碰撞检测模型。通过对缠绕肋条缠绕过程进行仿真,获得了缠绕肋条缠绕过程的动力学响应,分析了阻尼系数选取对缠绕速度、中心毂接触力的影响,结果可为缠绕肋天线展开过程的动力学分析提供输入,并为缠绕肋天线研制过程中缠绕、展开试验提供参考。

The wrapping process of wrapped-rib antenna involves the coupling effect between flex- ible large deformation and large range motion,as well as the damping effect and the contact colli- sion between the wrapped-rib and the central hub. It is the key input for the deployment simula- tion of wrapped-rib antenna. The modeling of wrapped-rib is completed using the spatial ANCF （absolute nodal coordinate formulation）,and the Jacobi matrix for absolute nodal coordinates is deduced based on the proportional damping model. The rigid-flexible coupling system＇s contact and collision detection model of wrapped-rib and central hub is established. The dynamic process of the wrapped-rib is obtained by simulation, and the influences of the damping coefficients to wrapping velocity and the impact force on central hub are also analyzed. These results can provide input for the dynamic analysis of wrapped-rib antenna deploying process, and a reference for the wrapping and deploying test of wrapped-rib antenna.