Title :
On robustness of L1 adaptive control with time varying perturbations & filter design
Author :
Naghnaeian, Mohammad ; Voulgaris, Petros G. ; Hovakimyan, Naira
Author_Institution :
Mech. Sci. & Eng. Dept., Univ. of Illinois, Urbana, IL, USA
Abstract :
In this paper, stability and performance robustness of L1 adaptive control for a class of LTI systems with time varying perturbations is considered. We derive a lower bound on the time delay margin at the input independent of the adaptation gain. Then, we present a systematic way to design a filter for which the desired performance and time delay margin is guaranteed. We show how this filter design can be captured as a stability robustness problem in l1 robust control theory framework.
Keywords :
adaptive control; delays; linear systems; perturbation techniques; robust control; time-varying systems; L1 adaptive control; L1 robust control theory framework; LTI systems; adaptation gain; filter design; lower bound; performance robustness; stability robustness problem; time delay margin; time varying perturbations; Adaptive control; Delay; Delay effects; Robust stability; Robustness; Stability analysis; Time varying systems;
Conference_Titel :
American Control Conference (ACC), 2012
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4577-1095-7
Electronic_ISBN :
0743-1619
DOI :
10.1109/ACC.2012.6315627
