挠性飞行器姿态稳定鲁棒变结构控制  

APPLICATION OF VARIABLE STRUCTURE ROBUST ATTITUDE CONTROLLER TO FLEXIBLE SPACECRAFT

作　　者：赵艳彬[1] 王萍萍[1] 王本利[1] 马兴瑞[1] 

机构地区：[1]哈尔滨工业大学航天工程与力学系,哈尔滨150001

出　　处：《动力学与控制学报》2005年第3期1-6,共6页Journal of Dynamics and Control

基　　金：国防十五预研资助项目(41320020301)

摘　　要：针对三轴稳定卫星的模型参数存在不确定性，设计了一种鲁棒变结构控制器，它能确保系统在一定 条件下具有全局渐近稳定性，并且系统在一定条件下能在有限的时间内到达滑动平面，具有鲁棒到达条件， 同时控制律实现简单．采用积分型滑动平面，能保证系统在到达滑动平面后具有良好的性能．最后根据卫星 参数给出了具体的数值算例，数值仿真结果良好．从数值仿真结果来看控制器在存在较大不确定性情况下 (考虑系统转动惯量有5%的不确定性)依然保持良好性能，具有很强的鲁棒稳定性．而且，采用边界层改进 控制器后，能有效地解决抖振问题，同时控制器的性能基本保持不变，说明鲁棒变结构控制器的设计是有 效的．This paper considered the influence of uncertainty in designing a variable structure flexible spacecraft attitude stability controller,and it provided one robust variable structure controller. The model can guarantee that the system has asymptotic stability under a certain condition, can reach the sliding mode hyperplanes in a limited time under a certain condition, and has good performance in sliding mode hyperplanes to the system. The controller is good according to the numerical simulation results when assuming the system inertia to be 5 % uncertainty, still keep good performance and has good robust stabilities. The controller can be further improved when adopting a border lager, because it can effectively .solve the shiver problem, and at the same time keeps the performance basically intact.

关 键 词：挠性 不确定性 变结构控制 鲁捧 变结构控制器 鲁棒稳定性 挠性飞行器 姿态稳定 全局渐近稳定性 保证系统 

分 类 号：V448[航空宇航科学与技术—飞行器设计]