Constrained controllability of linear impulse differential systems

Considers the following linear impulse differential control system x/spl dot/=A(t)x, t/spl ne/t/sub k/; /spl Delta/x=B/sub k/x(t/sub k/)+C/sub k/u/sub k/, t=t/sub k/; where the control sequences u/sub k/ belong to some set of admissible controllers that is restricted either by norm or by range. The authors then give a necessary and sufficient condition for global null controllability of time-varying systems and some sufficient conditions for global null controllability for time-invariant systems with special structures.<
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