OBSERVER DESIGN FOR A SPECIAL-CLASS OF NONLINEAR-SYSTEMS

In this paper, we present the design of an observer for a special clas s of nonlinear systems satisfying some regularity assumptions in both the single-output and multioutput case. The controlled part of the con sidered systems have a triangular structure. A further extension of th e design strategy is made to a specific class of multioutput systems w hich assume stronger nonlinear dependence between the various subsyste ms. The design is illustrated by a simulation experiment dealing with rotor flux estimation in an induction motor.