Fault reconstruction based on global diffeomorphic coordination transformation
基于微分同胚变换的故障重构算法

A robust fault diagnosis is presented for a class of uncertain nonlinear systems with unknown input disturbances. The system is transformed into two subsystems by means of the global diffeomorphic coordination transformation. One of the subsystems is free from faults whose states can be partially measured, while the other is subject to faults and all its states can be measured. In order to eliminate the effects of unknown disturbances, state observers are subsequently constructed for both subsystems based on the sliding mode variable structure theory, thus the studied system acquires its ability of reconstructing fault by applying the specific equivalent control methodology. Simulation examples demonstrate the effectiveness of the proposed design.