柔性太阳帆航天器动力学建模与姿态控制

Study on dynamics modeling and attitude control of flexible solar sail spacecraft

摘要:

对基于控制叶片的太阳帆航天器,推导考虑弹性振动的太阳帆姿态动力学方程和振动方程,利用非约束模态的概念给出了太阳帆航天器动力学方程的求解方法.结合超地球同步转移轨道太阳帆航天器偏航轴对地定向问题,设计了太阳帆俯仰轴的考虑Bang-Bang控制策略的PD控制器,数值仿真结果表明,所设计的基于控制叶片的控制器可以较快、较精确地实现偏航轴对地定向任务.

Abstract:

For solar sail spacecraft with control vanes,solar sail attitude dynamics equations considering elastic vibration and vibration equations were deduced.The solutions of solar sail spacecraft dynamics equations were achieved by utilizing the concepts of unconstraint modes.The PD controller with Bang-Bang control strategies was designed considering the problems of yaw axis earth-pointing of solar sail on super-synchronous transfer orbit.Numerical simulation shows that the designed controller based on control vanes is capable of controlling the yaw axis earth-pointing fast and accurately.