【摘要】 研究了系统中不确定因素不满足匹配条件且具有外部干扰的变结构鲁棒观测器的设计问题 .构造的观测器适用于标称系统是线性定常系统或可化为正则型的仿射非线性系统 .采用Lyapunov函数作为稳定观测器的判别条件 ,使观测器在有外部干扰时具有一致最终有界的构造误差 .观测器的构造利用了不确定因素的界 ,与某些结果相比 ,结果在实际中易于实现 .更多还原

【Abstract】 The design problem of variable structure robust observers for uncertain systems is explored, the uncertainties and extemal disturbances are all mismatched. The observers obtained in this paper are adapted to systems which posses linear or exactly linearizable nominal systems. Lyapunov function is chosen in order to verify the stability of observer,and it is proved that the observer error states are uniformly ultimately bounded. Observers obtained in this paper are constructed by using the bounds of uncertainties. In comparison with previous corresponding results, the observers are easy for practice.更多还原