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Estimation of systems with statistically-constrained inputs. (English) Zbl 1207.93104

Summary: This paper discusses the estimation of a class of discrete-time linear stochastic systems with statistically-constrained Unknown Inputs (UI), which can represent an arbitrary combination of a class of un-modeled dynamics, random UI with unknown covariance matrix and deterministic UI. In filter design, an upper bound filter is explored to compute, recursively and adaptively, the upper bounds of covariance matrices of the state prediction error, innovation and state estimate error. Furthermore, the Minimum Upper Bound Filter (MUBF) is obtained via online scalar parameter convex optimization in pursuit of the minimum upper bounds. Two examples, a system with multiple piecewise UIs and a Continuous Stirred Tank Reactor (CSTR), are used to illustrate the proposed MUBF scheme and verify its performance.

MSC:

93E10 Estimation and detection in stochastic control theory
93E11 Filtering in stochastic control theory
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