Sensor Fault Detection, Isolation and Accommodation Based on the Stable Kernel Representation

This paper proposes a novel sensor fault detection, isolation and accommodation (FDIA) scheme based on the stable kernel representation. The core of the study is to design the virtual sensor for each sensor channel. The virtual sensors are designed based on the data-driven stable kernel representation to capture the system dynamics. In addition, the existence condition of the virtual sensors is also discussed in details. The sensor fault is detected and isolated based on the probability analysis of residuals. The fault accommodation is implemented by switching on the virtual sensor. The proposed method is finally validated on a simulated 2-input-3-output system under the closed-loop conditions.