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We consider particular linear switched systems (LSS) with autonomous transitions, that we model by rectangular implicit representations. We design proper approximations for proportional and derivative descriptor variable feedback laws that were previously proposed for making unobservable (decoupling) the effect of the variable structure, and guarantee BIBO-stability for the switched controlled system...
In this paper, we show on a particular example that any Almost Controllability Subspace can also be interpreted as a subspace that can be made unobservable by means of a P.D. feedback. This is done using singularly perturbed techniques for analyzing the high gain feedbacks related to the Almost Controllability Subspace.
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