Robust fault detection of Lipschitz nonlinear systems: Application to heat recovery steam generator

Regarding a disturbance attenuation level as a measure of the robustness of an observer, the robust Fault Detection (FD) of Lipschitz nonlinear systems is noticed here. A nonlinear observer is designed based on different criteria for the class of nonlinear systems called Lipschitz nonlinear system. An FD system is obtained based on the nonlinear observer, which has some robustness aspect in the presence of disturbance and can efficiently detect various sensor and component faults. Simulation results show the effectiveness of the proposed FD system for the nonlinear Heat Recovery Steam Generator (HRSG) plant.