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容错控制系统鲁棒H∞和自适应补偿设计

DOI: 10.3724/SP.J.1004.2013.00031, PP. 31-42

Keywords: 容错控制,鲁棒H∞控制,直接自适应控制,线性矩阵不等式,动态输出反馈

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Abstract:

?通过设计动态输出反馈控制策略研究线性时不变系统执行器故障下的鲁棒自适应容错H∞控制问题.结合自适应技术和线性矩阵不等式(Linearmatrixinequalities,LMI)技术,设计一个控制策略同时实现系统的故障补偿控制和性能优化控制.在设计中,提出由自适应律在线调节控制增益方程补偿未知执行器故障和摄动;并设计一个基于模式依赖李亚普诺夫方程的LMI条件解出控制参数及次优H∞性能.所设计的动态输出反馈控制器可以处理一般执行器卡死故障,并得到更少保守性的H∞性能指标.此外,一个更具挑战性的问题,即通过自适应机构补偿故障致使系统多少性能退化得到论证.所提方法的有效性由一个解耦线性化动态飞行器系统仿真验证.

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