Stabilizing a linear system with quantized state feedback
Delchamps, D.F.
Automatic Control, IEEE Transactions on
Volume 35, Issue 8, Aug 1990 Page(s):916 - 924
Digital Object Identifier 10.1109/9.58500
Summary:The problem of stabilizing an unstable, time-invariant,
discrete-time, linear system by means of state feedback when the
measurements of the state are quantized is addressed. It is found that
there is no control strategy that stabilizes the system in the
traditional sense of making all closed-loop trajectories asymptotic to
zero. If the system is not excessively unstable, feedback strategies
that bring closed-loop trajectories arbitrarily close to zero for a long
time can be implemented. It is also found that when the ordinary linear
feedback of quantized state measurements is applied, the resulting
closed-loop system behaves chaotically. The asymptotic pseudorandom
closed-loop system dynamics differ substantially from what would be
predicted by a conventional signal-with-noise analysis of the
quantization's effects. Probabilistic reformulations of the stability
problem in terms of the invariant measure are considered
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