Title :
Estimation of parametric fault in closed-loop systems
Author :
Niemann, Henrik ; Poulsen, Niels Kjolstad
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
The aim of this paper is to present a method for estimation of parametric faults in closed-loop systems. The key technology applied in this paper is coprime factorization of both the dynamic system as well as the feedback controller. Using the Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization, it is shown that a certain matrix transfer function, the fault signature matrix, is an LFT (linear fractional transformation) of the parametric faults. Further, for limit parametric faults, the fault signature matrix transfer function can be approximated with a linear matrix function of the parametric faults.
Keywords :
MIMO systems; closed loop systems; fault tolerant control; feedback; linear systems; matrix decomposition; transfer function matrices; LFT; YJBK; Youla-Jabr-Bongiorno-Kucera parameterization; closed-loop systems; coprime factorization; dynamic system; fault signature matrix transfer function; feedback controller; linear fractional transformation; parametric fault estimation; Adaptive control; Approximation methods; Closed loop systems; Estimation; Fault detection; Fault diagnosis; Transfer functions; MIMO systems; Parametric fault estimation; YJBK parameterization; closed-loop system; feedback controllers;
Conference_Titel :
American Control Conference (ACC), 2015
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4799-8685-9
DOI :
10.1109/ACC.2015.7170735
