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On the gap between the structural controllability of time-varying and time-invariant systems

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1 Author(s)
Poljak, S. ; Dept. of Appl. Math., Charles Univ., Prague, Czechoslovakia

Structural controllability of time-invariant and time-varying systems when the input control sequences have a restricted length k is compared. The dimensions of controllable space coincide in the following three special cases: the input sequences have length k=2; the input sequences have k=n, where n is the size of the system (i.e., the ultimate controllability is the same in both cases); and for every length of input sequences provided that the system has a single input only. It is proved that there may appear a gap for every input length k such that 2< kn/2. The case when n/2<k<n is left open

Published in:

Automatic Control, IEEE Transactions on  (Volume:37 ,  Issue: 12 )

Date of Publication:

Dec 1992

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