Title :
Output-feedback fault tolerant control for linear time delay systems: Descriptor approach
Author :
Abdelkrim, Nouceyba ; Bouattour, Maha ; El Hajjaji, Ahmed ; Chaabane, Mohamed
Author_Institution :
URMACS, Univ. of Gabes, Gabes, Tunisia
Abstract :
In this paper we propose a new approach of fault estimation and Fault Tolerant Control (FTC) applied to Linear Time Delay (LTD) systems. To estimate the sensor faults we use the descriptor approach. This method consists in augmenting the state system by considering the faults as an auxiliary state. The used observer can estimate simultaneously both the state of LTD system and sensor faults. The observer gains are then determined according to Linear Matrix Inequalities (LMI) technique. For the step of FTC we construct an output-feedback gain to stabilize the LTD system not only in free-fault case, but also in the fault occurrence. A numerical example is proposed to demonstrate the efficiency of the given design for different form of sensor fault.
Keywords :
delays; fault tolerant control; feedback; linear matrix inequalities; linear systems; observers; stability; FTC; LMI; LTD system stabilization; auxiliary state; descriptor approach; fault estimation; fault occurrence; linear matrix inequalities; linear time delay systems; observer gains; output-feedback fault tolerant control; sensor faults; Educational institutions; Fault tolerance; Fault tolerant systems; Observers; Symmetric matrices; Descriptor approach; FTC; LMI; LTD system; Observer; Output-feedback; Sensor faults estimation;
Conference_Titel :
Control and Automation (MED), 2014 22nd Mediterranean Conference of
Conference_Location :
Palermo
Print_ISBN :
978-1-4799-5900-6
DOI :
10.1109/MED.2014.6961412
