Ehanced sensor/actuator resolution and robustness analysis for FDI using the extended generalized parity vector technique

This paper is an extension of the generalized parity vector (GPV) approach presented by the authors (2005), Some aspects of sensor isolation are first clarified and a special case is defined to solve an important sensor/actuator fault detection and isolation (FDI) ambiguity issue. To overcome this problem, a new optimization constraint is incorporated in the transformation generation procedure used to improve separation in the generalized parity space. The validity of the different aspects analyzed through this research is demonstrated by testing this FDI scheme using a nonlinear jacketed continuously stirred tank reactor model. Robustness analysis is then performed over the controller envelope, showing the capability of the FDI technique to handle operating point and fault size variability