【作者】 李洋； 仇原鹰； 张军； 彭福军；

【Author】 LI Yang~1,QIU Yuan-ying~1,ZHANG Jun~2,PENG Fu-jun~2 (1.Xidian University,Xi’an 710071,China; 2.Aerospace System Engineering Shanghai,Shanghai 201108,China)

【机构】 西安电子科技大学机电工程学院； 上海宇航系统工程研究所；

【摘要】 带有大型挠性附件的三轴稳定卫星,其姿态控制存在着很强的非线性和强耦合问题,并且由于挠性附件的振动使控制更加复杂。本文将SDRE(State-Dependent Riccati Equation)控制器引入挠性卫星的姿态控制中,根据SDRE局部渐近稳定的特点保证姿态系统的稳定性,同时利用基于独立模态控制的PPF(Positive Position Feedback)方法对挠性附件振动进行抑制,选取低阶模态,并利用二次最优理论对反馈增益求解。仿真结果表明挠性卫星在受到干扰时可以较好稳定,而且其挠性附件振动迅速衰减,减小对姿态控制影响。更多还原

【Abstract】 The inertia coupling and nonlinear problems exist in the attitude control of a three-axis stabilized satellite with large flexible appendages.Moreover,the vibration of the flexible appendages makes complication to the system.A hybrid control scheme is proposed.SDRE method is introduced to control the attitude of the satellite.According to the feature of SDRE that local asymptotic stability,closed-loop systems stability is guaranteed.For damping the vibration of appendages,PPF controller,based on independent modal space control method,is employed.The lower modes are intercepted, and gains of the controller are obtained using the linear quadratic regulator method. Finally,simulation results show the good performance of the attitude stabilization in spite of the disturbance torque,and the fast decay of vibration.更多还原