On Finite-Gain Stabilizability of Linear Systems Subject to Input Saturation

Authors:
Wensheng Liu;Yacine Chitour;Eduardo Sontag
Affiliations:
-;-;-
Venue:
SIAM Journal on Control and Optimization
Year:
1996

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Abstract

This paper deals with (global) finite-gain input/output stabilization of linear systems with saturated controls. For neutrally stable systems, it is shown that the linear feedback law suggested by the passivity approach indeed provides stability, with respect to every $L^p$-norm. Explicit bounds on closed-loop gains are obtained, and they are related to the norms for the respective systems without saturation.These results do not extend to the class of systems for which the state matrix has eigenvalues on the imaginary axis with nonsimple (size $1$) Jordan blocks, contradicting what may be expected from the fact that such systems are globally asymptotically stabilizable in the state-space sense; this is shown in particular for the double integrator.