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By some special state and output transformations, a reduced-order switched system is constructed such that a finite-time switched observer can be constructed, where the unknown inputs of the original system are removed. A cluster of finite-time observers are proposed for all reduced-order subsystems. Then, the state estimation of a reduced-order switched system is derived from the finite-time switched observer by choosing any small time-delay parameters, and the finite-time state estimation of the original switched system is also obtained from the estimated states of the reduced-order switched system based on the state equivalent transformation. Next, a kind of active mode identification method is proposed by minimizing the output residual norm. Finally, a simulation example is given to verify the reliability of the proposed method.<\/jats:p>","DOI":"10.1177\/0142331219827049","type":"journal-article","created":{"date-parts":[[2019,2,1]],"date-time":"2019-02-01T00:43:36Z","timestamp":1548981816000},"page":"3182-3189","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":4,"title":["Finite-time state estimation and active mode identification for uncertain switched linear systems"],"prefix":"10.1177","volume":"41","author":[{"given":"Yantao","family":"Chen","sequence":"first","affiliation":[{"name":"College of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chen","family":"Wu","sequence":"additional","affiliation":[{"name":"College of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, 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