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Fault Diagnosis for Underwater Vehicles using Moving Horizon Estimation and Gaussian Processes

2026-09-13 14:25:37
Fotis Panetsos, Kostas J. Kyriakopoulos
arXiv_RO
         
Abstract

This work proposes a model-based fault detection and diagnosis framework for underwater vehicles subject to actuator faults that explicitly accounts for the presence of unmodeled dynamics. To this end, a Moving Horizon Estimator (MHE) is developed to estimate the lumped disturbance, capturing both unmodeled and fault effects. Gaussian Processes (GPs) are employed to approximate the unmodeled dynamics, providing predictions of the corresponding mean and uncertainty across diverse operating conditions. During online operation, the residual between the MHE lumped disturbance estimate and the GP prediction is evaluated using a Generalized Likelihood Ratio Test. By incorporating GP-based predictions within the diagnostic framework, robustness to unmodeled dynamics is achieved, enabling effective fault detection and isolation as well as accurate quantitative estimation of fault magnitude. The proposed methodology is experimentally validated in a laboratory water tank, demonstrating reliable diagnostic performance under both open-loop and closed-loop control.

Abstract (translated)

URL

https://arxiv.org/abs/2609.14539

PDF

https://arxiv.org/pdf/2609.14539.pdf

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