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A reduced order observer based controller design for H-optimization

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3 Author(s)
A. A. Stoorvogel ; Dept. of Math. & Comput. Sci., Eindhoven Univ. of Technol., Netherlands ; A. Saberi ; B. M. Chen

In this note the H control problem with measurement feedback is investigated. It is well-known that for this problem, in general, we need controllers of the same dynamic order as the given system. However, in the case that some entries of the measurement vector are not noise-corrupted, we show that one can find dynamic compensators of a lower dynamical order. Note that this implies that the standard assumptions on the direct feedthrough matrices, as made in most papers on H control, are not satisfied. Our result can be derived by using reduced order observer based controllers.

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IEEE Transactions on Automatic Control  (Volume:39 ,  Issue: 2 )