The issue of attitude maneuver of a flexible spacecraft is investigated with single gimbaled control moment gyroscopes （SGCMGs） as an actuator. To solve the inertia uncertainty of the system, an adaptive attitude co...The issue of attitude maneuver of a flexible spacecraft is investigated with single gimbaled control moment gyroscopes （SGCMGs） as an actuator. To solve the inertia uncertainty of the system, an adaptive attitude control algorithm is designed by applying a radial basis function （RBF） neural network. An improved steering law for SGCMGs is proposed to achieve the optimal out- put torque. It enables the SGCMGs not only to avoid singularity, but also to output more precise torque. In addition, global, uniform, ultimate bounded stability of the attitude control system is proved via the Lyapunov technique. Simulation results demonstrate the effectiveness of the new steering law and the algorithm of attitude maneuver of the flexible spacecraft.展开更多
针对五棱锥单框架控制力矩陀螺群(Single gimbaled control moment gyroscopes,SGCMGs)中存在的奇异问题,建立五棱锥构型SGCMGs系统动力学模型,基于双曲正弦函数和分段函数设计鲁棒系数,改进鲁棒伪逆操纵律,使SGCMGs系统在处于奇异状态...针对五棱锥单框架控制力矩陀螺群(Single gimbaled control moment gyroscopes,SGCMGs)中存在的奇异问题,建立五棱锥构型SGCMGs系统动力学模型,基于双曲正弦函数和分段函数设计鲁棒系数,改进鲁棒伪逆操纵律,使SGCMGs系统在处于奇异状态时,保证框架角速度不为零,从而逃离奇异;在接近奇异状态时迅速避开奇异,在远离奇异状态时更精确地输出期望力矩。通过SGCMGs不同类型力矩输出和挠性航天器大角度姿态机动控制的仿真结果表明,所提SGCMGs操纵律既能够较好地规避奇异状态,又能在远离奇异时精确地输出期望力矩。展开更多
基金supported by the National Natural Science Foundation of China(61473152)the China Scholarship Council and the Educational Innovation Project for Graduate Students of Jiangsu Province(KYLX15 0399)
文摘The issue of attitude maneuver of a flexible spacecraft is investigated with single gimbaled control moment gyroscopes （SGCMGs） as an actuator. To solve the inertia uncertainty of the system, an adaptive attitude control algorithm is designed by applying a radial basis function （RBF） neural network. An improved steering law for SGCMGs is proposed to achieve the optimal out- put torque. It enables the SGCMGs not only to avoid singularity, but also to output more precise torque. In addition, global, uniform, ultimate bounded stability of the attitude control system is proved via the Lyapunov technique. Simulation results demonstrate the effectiveness of the new steering law and the algorithm of attitude maneuver of the flexible spacecraft.
文摘针对五棱锥单框架控制力矩陀螺群(Single gimbaled control moment gyroscopes,SGCMGs)中存在的奇异问题,建立五棱锥构型SGCMGs系统动力学模型,基于双曲正弦函数和分段函数设计鲁棒系数,改进鲁棒伪逆操纵律,使SGCMGs系统在处于奇异状态时,保证框架角速度不为零,从而逃离奇异;在接近奇异状态时迅速避开奇异,在远离奇异状态时更精确地输出期望力矩。通过SGCMGs不同类型力矩输出和挠性航天器大角度姿态机动控制的仿真结果表明,所提SGCMGs操纵律既能够较好地规避奇异状态,又能在远离奇异时精确地输出期望力矩。
