航天器时延自适应变结构容错控制  

Combined adaptive variable structure and time delay fault tolerant control for spacecraft

作　　者：姜野[1] 胡庆雷[1] 马广富[1] 

机构地区：[1]哈尔滨工业大学控制科学与工程系,哈尔滨150001

出　　处：《控制与决策》2010年第5期651-656,共6页Control and Decision

基　　金：国家自然科学基金项目(60774062);高等学校博士学科点专项科研基金项目(20070213061);教育部留学回国人员科研启动基金项目;黑龙江省留学回国人员科学基金项目(LC08C01);中国空间技术研究院(CAST)创新基金项目(CAST200820)

摘　　要：针对航天器存在未知惯量参数以及干扰与执行机构失效的姿态机动问题,提出一种将自适应变结构控制与时延技术相结合的鲁棒容错控制方法.该方法在继承变结构控制优点的同时,提高了控制律对参数和干扰变化的自适应能力;利用时延技术的逼近能力补偿执行机构的故障,使得控制器对执行机构的失效具有很强的容错能力,并且执行机构故障信息不需进行在线检测和分离.仿真结果表明,在完成姿态调节控制的同时,所提出的方法具有良好的过渡过程品质.Time-delay-control（TDC） based adaptive variable structure control（AVSC） system is designed for spacecraft attitude maneuvers with redundant actuators（thrusters）,taking actuator failures,parametric uncertainties and external disturbances into account.More specifically,proposed scheme combines the TDC and AVSC design technique,such that this design does not require the knowledge of the boundedness of the considered uncertainties/disturbances,and only one parameter is required to be updated in the adaptive loop.With the TDC,the unknown actuator faults are estimated by using one-step previous state information and canceled out by the estimated values,such that it does not need a fault detection and isolation mechanism.Lyapunov stability analysis shows that the resulting closed-loop system is proven to be stable and the effect of the external disturbances and possible uncertainties on the output can be attenuated by appropriately choosing the design parameters.Both analytical and numerical results show the theoretical and practical merit of this approach.

关 键 词：航天器 容错控制 自适应变结构控制 延时控制 执行机构失效 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]