M. Saif et Y. Guan, A NEW APPROACH TO ROBUST FAULT-DETECTION AND IDENTIFICATION, IEEE transactions on aerospace and electronic systems, 29(3), 1993, pp. 685-695
A new methodology for instrument fault detection and identification (F
DI) in linear dynamical systems subject to plant parameter variations
or uncertainties is presented. At the heart of this approach is a robu
st estimator for which the necessary and sufficient conditions to its
existence are outlined. The robust estimator can simultaneously estima
te the unmeasurable state variables of the system for the purpose of c
ontrol, and provide necessary information for FDI purposes as well. A
novel feature of this approach is that it can actually identify the sh
ape and magnitude of the failures. The scheme allows for fast and accu
rate FDI, and can account for structural uncertainties and variations
in the parameters of the dynamical model of the system. The overall fa
ult tolerant control system strategy proposed is verified through simu
lation studies performed on the control of a vertical takeoff and land
ing (VTOL) aircraft in the vertical plane.