航天器非线性鲁棒自适应姿态机动控制律

针对存在未知转动惯量和外部干扰力矩的敏捷航天器快速大角度姿态机动问题,结合非线性反步法和Lyapunovo稳定性分析方法设计控制力矩和转动惯量估计值的非线性鲁棒自适应控制律。在控制力矩控制律中,加入非线性阻尼项对外部干扰力矩进行补偿,证明了系统的全局一致最终有界稳定性。引入非线性动系数增加系统的动态性能,提高了姿态快速机动后的快速稳定能力。在Maltlab/Simulink环境下进行航天器姿态机动控制仿真研究,仿真结果验证了所设计控制器的有效性和可行性。

Nonlinear robust adaptive attitude maneuver control law for spacecraft

In the presence of uncertainties in the moment of inertia and the external disturbance torque, the nonlinear robust adaptive control law for the control torque and estimation of moment of inertia is designed combining the nonlinear backstepping and Lyapunovo stability. In the control law for the control torque, the nonlinear damping is added to compensate the external disturbance torque, and the globally uniformly ultimately bounded stability of the system is demonstrated. The nonlinear dynamic coefficient is introduced to increase the dynamic performance of the system, shortening the regulating time after fast attitude maneuver. By Matlab/Simulink programming, the simulation of spacecraft attitude manoeuver control is discussed, and the simulation results demonstrate the effectiveness and feasibility of the proposed controller.