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在建立惯性定向三轴稳定卫星非线性耦合姿态运动模型的基础上,设计了姿态三轴稳定控制的自适应滑模变结构控制器.在控制器的设计中,考虑了小卫星惯量参数的不确定性以及外界力矩干扰的情况,利用自适应滑模变结构控制方法在线辨识干扰力矩的极值以及卫星惯量参数,并依此动态调整控制器的输出.基于Lyapunov稳定性原理证明了所设计的控制器能够使系统全局一致最终有界稳定.仿真结果表明了该控制方法的有效性和可行性.
On the basis of establishing the nonlinear coupled attitude motion model of the inertial directional three-axis stable satellite, an adaptive sliding mode variable structure controller with attitude and three-axis stability control is designed. In the controller design, the inertial parameters of the small satellite Certainty and disturbance of external torque, the extremum of disturbance torque and satellite inertia parameter are identified on-line by adaptive sliding mode variable structure control method, and the output of controller is dynamically adjusted based on the principle of Lyapunov stability. It is proved that the designed The controller can make the system globally uniform and ultimately bounded and stable.The simulation results show the effectiveness and feasibility of the proposed control method.