Title of article :
Disturbance attenuation properties of time-controlled switched systems
Author/Authors :
Zhai، نويسنده , , Guisheng and Hu، نويسنده , , Bo and Yasuda، نويسنده , , Kazunori and Michel، نويسنده , , Anthony N.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Abstract :
In this paper, we investigate the disturbance attenuation properties of time-controlled switched systems consisting of several linear time-invariant subsystems by using an average dwell time approach incorporated with a piecewise Lyapunov function. First, we show that when all subsystems are Hurwitz stable and achieve a disturbance attenuation level smaller than a positive scalar γ0, the switched system under an average dwell time scheme achieves a weighted disturbance attenuation level γ0, and the weighted disturbance attenuation approaches normal disturbance attenuation if the average dwell time is chosen sufficiently large. We extend this result to the case where not all subsystems are Hurwitz stable, by showing that in addition to the average dwell time scheme, if the total activation time of unstable subsystems is relatively small compared with that of the Hurwitz stable subsystems, then a reasonable weighted disturbance attenuation level is guaranteed. Finally, a discussion is made on the case for which nonlinear norm-bounded perturbations exist in the subsystems.
Keywords :
Switched system , Switching law , disturbance attenuation , Average dwell time , Perturbations , Piecewise Lyapunov function
Journal title :
Journal of the Franklin Institute
Journal title :
Journal of the Franklin Institute