Title :
A geometric approach to nonlinear fault detection and isolation
Author :
De Persis, Claudio ; Isidori, Alberto
Author_Institution :
Dept. of Syst. Sci. & Math., Washington Univ., St. Louis, MO, USA
fDate :
6/1/2001 12:00:00 AM
Abstract :
We present a differential geometric approach to the problem of fault detection and isolation for nonlinear systems. A necessary condition for the problem to be solvable is derived in terms of an unobservability distribution, which is computable by means of suitable algorithms. The existence and regularity of such a distribution implies the existence of changes of coordinates in the state and in the output space which induce an “observable” quotient subsystem unaffected by all fault signals but one. For this subsystem, a fault detection filter is designed
Keywords :
differential geometry; fault diagnosis; nonlinear systems; observability; observers; differential geometry; fault detection; fault isolation; necessary condition; nonlinear systems; observability; observers; unobservability distribution; Distributed computing; Fault detection; Feedback; Filters; Helium; Nonlinear systems; Observability; Signal detection; Signal generators; Stability;
Journal_Title :
Automatic Control, IEEE Transactions on