【摘要】 本文提出一种新的变速控制力矩陀螺(VSCMGs)的角动量管理方法.将VSCMGs的控制力矩(CMGs)模式和飞轮模式分开求解同步输出,对CMGs模式力矩输出进行奇异值分解,只有CMGs模式接近奇异的时候,在奇异方向上的指令力矩才会分配一部分给RWs模式,从而在保证VSCMGs输出精度的情况下尽量充分的利用VSCMGs的执行能力.同时角动量管理算法中还引入零运动来实现转子轮速平衡以及框架构型避奇异,并且考虑了框架角速度死区非线性以及忽略项的补偿问题.仿真结果表明,所设计的操纵律在航天器大角度快速姿态机动时,可以实现高精度的大力矩输出.更多还原

【Abstract】 A new angular momentum management method for variable speed control moment gyroscope( VSCMGs) is proposed in this paper. The control torque( CMGs) mode and the flywheel mode from the VSCMGs is seperated,and the singular value decomposition on the CMGs mode torque output is performed. Only when the CMGs mode is close to singular,the command torque in the singular direction be distributed to RWs mode,so as to make full use of VSCMGs execution ability while ensuring VSCMGs output accuracy. At the same time,zero motion is also introduced into the angular momentum management algorithm to achieve rotor wheel speed balance and frame structure avoidance singularity,and the nonlinearity of the dead-zone of the frame angular velocity and the compensation of neglected items are considered. Simulation results show that the designed control law can achieve high-precision high-torque output when maneuvering large-angle and high-speed spacecraft.更多还原