摘要
基于刚柔耦合动力学模型仿真分析卫星机动过程的动力学特性。模型将天线上的柔性金属网近似成阻尼弹簧模型,将径向肋刚化并等效其柔性为径向肋根部的扭簧转角;利用该简化模型研究了卫星机动过程中径向肋和金属网的柔性对卫星姿态的影响。通过仿真分析天线卫星系统在不同结构参数情况以及不同驱动力作用下的卫星机动过程动力学特性,对比分析得出:提高径向肋的固有频率,增加金属网以及增大径向肋扭簧的阻尼能有效降低刚柔耦合问题对卫星本体姿态的影响。
The dynamic characteristic of satellite during the maneuvering process is studied based on a rigid -flexible dynamic mode. The flexible metal net is modeled as a damping-spring with mass, while the flexible radial rib is modeled as a rigid-body with its flexibility on the torsion spring in the roots. The influence of the flexibility of radial rib and metal net on the satellite attitude is analyzed using the above approximation mode. The simulation results show that it can improve the attitude stabilization of the satellite by increasing the natural frequency of the radial rib, adding metal net or enlarging the damping of the torsion spring.
出处
《系统仿真技术》
2014年第4期303-308,332,共7页
System Simulation Technology
关键词
卫星机动
刚柔耦合动力学
卫星姿态
satellite maneuvering
rigid-flexible dynamics
satellite attitude
