Cf. Cheng et al., ON THE ROBUSTNESS OF THE STABILITY OF LYAPUNOV-TYPE STATE-FEEDBACK SYSTEMS, Control, theory and advanced technology, 9(3), 1993, pp. 789-797
A generalized Lyapunov-type state feedback design for uncertain system
s is proposed. Based on the solution of the proposed Lyapunov-type equ
ation, bounds of the nonlinear (linear), time-varying/invariant uncert
ainties are obtained to maintain the system's stability. No statistica
l description of uncertain elements is assumed, and it is not necessar
y for the so-called ''matching condition'' to be satisfied, either.