Title :
UIO for fault detection in vector second order systems
Author :
Demetriou, Michael A.
Author_Institution :
Dept. of Mech. Eng., Worcester Polytech. Inst., MA, USA
Abstract :
The purpose of the article is to construct natural observers for vector second order systems by utilizing unknown input observer (UIO) methods. This observer will subsequently be used in a robust fault detection scheme and also as an adaptive detection scheme for a certain class of actuator faults, wherein the time instance and characteristics of an incipient actuator fault are detected. Stability of the adaptive scheme is provided by a parameter-dependent Lyapunov function for second order systems. A numerical example on a mechanical system describing an automobile suspension system is used to illustrate the theoretical results
Keywords :
Lyapunov methods; actuators; adaptive control; automobiles; fault diagnosis; mechanical variables control; observers; robust control; vectors; UIO; actuator faults; adaptive detection scheme; adaptive scheme; automobile suspension system; fault detection; incipient actuator fault; mechanical system; natural observers; parameter-dependent Lyapunov function; robust fault detection scheme; second order systems; time instance; unknown input observer methods; vector second order systems; Actuators; Circuit faults; Fault detection; Fluid dynamics; Lyapunov method; Mechanical systems; Observers; Stability; State estimation; Yield estimation;
Conference_Titel :
American Control Conference, 2001. Proceedings of the 2001
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-6495-3
DOI :
10.1109/ACC.2001.945870
