Title :
Robust state feedback control of LTV systems: nonlinear is better than linear
Author :
Blanchini, F. ; Megretski, A.
Author_Institution :
Dipt. di Matematica e Inf., Udine Univ., Italy
fDate :
4/1/1999 12:00:00 AM
Abstract :
Examples of linear control systems with fast time-varying uncertain coefficients are given, which can be stabilized by a nonlinear memoryless state feedback, but cannot be stabilized by a linear time-invariant dynamic state feedback. By means of one of these examples the authors show that the closed loop quadratic stability margin may be infinitely smaller than the actual stability margin
Keywords :
Lyapunov methods; closed loop systems; linear systems; nonlinear control systems; robust control; state feedback; time-varying systems; uncertain systems; Lyapunov method; closed loop systems; linear control systems; nonlinear control systems; robust control; stability margin; state feedback; time-varying systems; uncertain systems; Adaptive control; Automatic control; Control systems; Force control; Linear feedback control systems; Nonlinear control systems; Robotics and automation; Robust control; State feedback; Uncertainty;
Journal_Title :
Automatic Control, IEEE Transactions on
