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In this paper we study the geometrical properties of the set of reachable states of a single input discrete-time linear time invariant (LTI) system with positive controls. This set is a cone and it can be expressed as the direct sum of a linear subspace and a proper cone. In order to give a complete geometrical characterization of the reachable set, we provide a formula to evaluate the dimension of the largest reachable subspace and necessary and sufficient conditions for polyhedrality of the proper cone in terms of eigenvalues location.
Benvenuti et al. (Sun,) studied this question.
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