Fault detection and isolation of concentration sensors in simulated moving bed chromatographic processes (SMB)

This paper deals with the problem of observer-based fault diagnosis for a Simulated Moving Bed (SMB) chromatographic process. A fault detection and isolation (FDI) system is designed such that the sensor faults are detected and located. The residual generation is based on a nonlinear varying-parameters observer scheme. The question of stability is addressed in terms of Lyapunov quadratic stability and sufficient conditions are obtained through strict linear matrix inequalities formulation (LMIs).