考虑太阳帆板振动的空间绳系拖曳动力学与控制

针对使用空间绳网捕获带有太阳帆板等柔性附件的大型失效航天器的碎片清除任务，充分考虑了拖曳过程中柔性附件产生的振动对系统的稳定造成的影响。首先采用凯恩方法建立了失效航天器绳系拖曳系统动力学模型，在建模过程中充分考虑系绳的质量和振动、帆板的振动、系统的轨道运动对姿态的影响等，使动力学模型更加详细和完整，且该动力学模型不受失效航天器所处位置的限制，适用于任意轨道上的失效航天器的拖曳离轨任务；之后根据平衡状态的特点，求取了系统的平衡解，并在平衡解附近对动力学方程线性化，然后采用李雅普诺夫方法分析了系统的稳定性及各参数的变化规律；并针对失效航天器可能产生的姿态章动设计了常值张力切换控制律；最后采用数值仿真的方法分析了失效航天器的帆板振动对绳系拖曳过程的影响，校验了控制律的有效性。

Research on Towing Dynamics and Control Method of Space TetherSystem Considering Solar Panel Vibration

In order to capture the debris of a large scale defunct spacecraft with flexible appendages such as solar panels, the influence of the vibration of flexible appendages on the stability of the system during towing process is fully considered. In the modeling, mass and vibration of the tether, vibration of the solar panels and influence of the orbit motion of the system on attitude are fully taken into consideration to make the dynamic model more detailed and complete. The dynamic model is not subject to the position of the defunct spacecraft and is suitable for the defunct spacecraft in any orbit. After that, according to the characteristics of the equilibrium state, the equilibrium solution of the system is obtained, and the dynamic equation is linearized near the equilibrium solution. Then, the stability of the system and the change rule of each parameter are analyzed by Lyapunov method. A constant tension switching control law is designed for the attitude nutation that the defunct spacecraft can produce. Finally, the numerical simulation method is used to analyze the effect of the vibration of the defunct spacecraft’s solar panels in the towing process and to verify the effectiveness of the control law.