Comparison of identification and parity space approaches for failure detection in single input single output systems

This paper deals with fault detection and isolation methods (FDI) in linear dynamic SISO systems. Two different approaches for the residuals generation are reviewed: parity space and parameters identification based approaches. After having recalled the analytical formulation of the residuals from the two methods, we perform a comparison between them. The interpretation of the result is discussed in this framework and some simulation results are finally presented