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A robust and adaptive switched observer is developed such that the states of an original nonlinear switched system can be asymptotically estimated, where the Lipschitz constant of the nonlinear term may be unknown since the designed adaptation law can adaptively adjust it. Based on the feasible solution of an optimization problem with a linear matrix inequality constraint, the observer gain matrices are obtained and guarantee the existence of a robust switched observer. Meanwhile, the switching signals are designed such that the observer error dynamics is globally uniformly exponentially stable, and the sufficient conditions of the existence of a robust sliding-mode switched observer are derived. Finally, the effectiveness of the proposed approaches is illustrated by a numerical example and switched R\u00f6ssler chaotic dynamics.<\/jats:p>","DOI":"10.1177\/0142331216673697","type":"journal-article","created":{"date-parts":[[2016,10,31]],"date-time":"2016-10-31T20:51:02Z","timestamp":1477947062000},"page":"1082-1091","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":12,"title":["Robust adaptive state estimation for uncertain nonlinear switched systems with unknown inputs"],"prefix":"10.1177","volume":"40","author":[{"given":"Junqi","family":"Yang","sequence":"first","affiliation":[{"name":"College of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yantao","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, 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