An Inversion-Based Fault Reconstruction Approach in Nonlinear Systems

Abstract

This paper presents an inversion-based fault reconstruction approach for a wide class of nonlinear systems subject to an actuator or plant fault. If the nonlinear system has finite relative order with respect to the fault signal, the inverse system as an observer-based filter, reproduces the fault at its output. A simulation for a continuous-stirred tank reactor (CSTR) model include flow rate fault is used to illustrate the effectiveness of the proposed method.