Title :
Fault detection for networked control system based on H∞ observer
Author :
Li, Zhijun ; Sun, Dehui ; Li, Yueheng ; Shi, Yuntao
Author_Institution :
Key Lab. of Beijing for Field-bus Technol. & Autom., North China Univ. of Technol., Beijing, China
Abstract :
In this paper, fault detection for networked control system with data packet dropout between sensor and controller is discussed. A fault observer structure is proposed, in which the error between system output and observer output at the last sampling time, when data packet is transmitted to the controller successfully, is used as the feedback of the observer if data packet is lost. It will be shown that if continuous data packet dropout is finite, the dynamics of observer error can be modeled as a switched system. The observer gain is designed by H∞ performance and obtained by solving an LMI optimization problem. The system fault can be detected by a residual signal produced from observer error. A simulation example shows the effectiveness of proposed method.
Keywords :
H∞ control; fault diagnosis; linear matrix inequalities; observers; optimisation; H infinity observer; H infinity performance; LMI optimization problem; continuous data packet dropout; fault detection; fault observer structure; linear matrix inequalities; networked control system; observer gain; residual signal; switched system;
Conference_Titel :
Control and Automation, 2009. ICCA 2009. IEEE International Conference on
Conference_Location :
Christchurch
Print_ISBN :
978-1-4244-4706-0
Electronic_ISBN :
978-1-4244-4707-7
DOI :
10.1109/ICCA.2009.5410434
