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Robust H filtering of stationary continuous-time linear systems with stochastic uncertainties

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4 Author(s)
Gershon, E. ; Dept. of Electr. Eng., Tel Aviv Univ., Israel ; Limebeer, D.J.N. ; Shaked, U. ; Yaesh, I.

The problem of applying H filters on stationary, continuous-time, linear systems with stochastic uncertainties in the state-space signal model is addressed. These uncertainties are modeled via white noise processes. The relevant cost function is the expected value of the standard H performance index with respect to the uncertain parameters. The solution is obtained via a stochastic bounded real lemma that results in a modified Riccati inequality. This inequality is expressed in the form of a linear matrix inequality whose solution provides the filter parameters. The method proposed is also applied to the case where, in addition to the stochastic uncertainty, other deterministic parameters of the system are not perfectly known and are assumed to lie in a given polytope. The problem of mixed H2 /H filtering for the above system is also treated. The theory developed is demonstrated by a practical example

Published in:

Automatic Control, IEEE Transactions on  (Volume:46 ,  Issue: 11 )