Game theory approach to state and input simultaneous estimation for discrete-time LTV systems

Fu-qiang You, Fu-li Wang and Shou-ping Guan

International Journal of Systems Science, 2012, vol. 43, issue 5, 854-860

Abstract: This article aims to provide a simple approach realising state observation and input estimation simultaneously for discrete-time LTV systems in H∞ setting. Through solving a two-player zero sum differential game, appealing results are obtained in two folds. First, necessary and sufficient solvability conditions for state and input simultaneous estimation problem are given in terms of solution to a set of difference Riccati recursion. Second, one estimator is presented with special innovation structure, where innovation information is used to update state observation tuned by gain matrix and to provide input estimation through a projector matrix, where gain matrix and projector matrix are constructed from solution to difference Riccati recursion. At last, simulation results are provided to justify proposed approach.

Date: 2012
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DOI: 10.1080/00207721.2010.536397

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