Data-Driven Fault Isolation in Linear Time-Invariant Systems: A Subspace Classification Approach
Abstract
We study the problem of fault isolation in linear systems with actuator and sensor faults within a data-driven framework. We propose a nullspace-based filter that uses solely fault-free input-output data collected under process and measurement noises. By reparameterizing the problem within a behavioral framework, we achieve a direct fault isolation filter design that is independent of any explicit system model. The underlying classification problem is approached from a geometric perspective, enabling a characterization of mutual fault discernibility in terms of fundamental system properties given a noise-free setting. In addition, the provided conditions can be evaluated using only the available data. Finally, a simulation study is conducted to demonstrate the effectiveness of the proposed method.
Cite
@article{arxiv.2509.01347,
title = {Data-Driven Fault Isolation in Linear Time-Invariant Systems: A Subspace Classification Approach},
author = {Mohammad Amin Sheikhi and Gabriel de Albuquerque Gleizer and Peyman Mohajerin Esfahani and Tamás Keviczky},
journal= {arXiv preprint arXiv:2509.01347},
year = {2026}
}