International Journal of Computer Applications |
Foundation of Computer Science (FCS), NY, USA |
Volume 88 - Number 16 |
Year of Publication: 2014 |
Authors: Maryam Naghdi, Mohamad Ali Sadrnia, Javad Askari |
10.5120/15434-3663 |
Maryam Naghdi, Mohamad Ali Sadrnia, Javad Askari . Fault Detection and Isolation for Nonlinear System via ESO. International Journal of Computer Applications. 88, 16 ( February 2014), 8-13. DOI=10.5120/15434-3663
In this paper fualt detection of nonlinear systems is accomplished by using extended state observer (ESO). Then, the fuzzy logic system is used to isolate faults. The major of observr-based fault detection methods relies on the accurate mathematical model of the system, but in the real world the accurate model may not be available. The ESO is different from conventional observers, it does not require a detailed model of the system, it provide vital information for fault detection with only partial information of the plant. The ESO can agument unknown dynamics combined with unknown external disterbance as extended state and estimate it in real time by using given input-output data. This paper presents a new sensor fault detection and isolation (FDI) via ESO and fuzzy logic system. A two-tank system is used as a case study. The simulation results confirm the effectiveness and simplicity of the fault detection and isolation by using proposed FDI technique.