Review of parity space approaches to fault diagnosis for aerospace systems

TLDR

This tutorial review focuses on parity‑space fault‑diagnosis methods for aerospace systems, emphasizing robustness and isolation challenges and outlining recent research on robust fault detection and novel parity‑space strategies. The authors present basic concepts, definitions, and a unified framework that links known parity‑space fault‑diagnosis techniques. Residual generation is identified as a core element of the framework, and recent studies propose new parity‑space approaches to enhance robustness in fault diagnosis.

Abstract

This paper provides a tutorial review of the state of the art in parity space fault diagnosis approaches with particular emphasis on aerospace systems. The basic concepts and definitions are given and a consistent framework is presented to draw together the important links amongst the known methods for fault diagnosis. Residual generation in the parity space has been recognized as a core element in this framework. The robustness and isolation problems are the main focus of the paper. Recent research topics on robust fault diagnosis are outlined, and new ideas as to how the parity space approach can be used to deal with robustness are discussed.