A Hybrid Intelligent Framework for Uncertainty-Aware Condition Monitoring of Industrial Systems

• URL: http://arxiv.org/abs/2604.09932v1
• Date: Fri, 10 Apr 2026 22:22:31 GMT
• Title: A Hybrid Intelligent Framework for Uncertainty-Aware Condition Monitoring of Industrial Systems
• Abstract summary: This work develops a hybrid condition monitoring framework that integrates primary sensor measurements, lagged temporal features, and physics-informed residuals.<n>Two hybrid integration strategies are examined. The first is a feature-level fusion approach that augments the input space with residual and temporal information.<n>The second is a model-level ensemble approach in which machine learning classifiers trained on different feature types are combined at the decision level.
• Score: 4.854320235705813
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Hybrid approaches that combine data-driven learning with physics-based insight have shown promise for improving the reliability of industrial condition monitoring. This work develops a hybrid condition monitoring framework that integrates primary sensor measurements, lagged temporal features, and physics-informed residuals derived from nominal surrogate models. Two hybrid integration strategies are examined. The first is a feature-level fusion approach that augments the input space with residual and temporal information. The second is a model-level ensemble approach in which machine learning classifiers trained on different feature types are combined at the decision level. Both hybrid approaches of the condition monitoring framework are evaluated on a continuous stirred-tank reactor (CSTR) benchmark using several machine learning models and ensemble configurations. Both feature-level and model-level hybridization improve diagnostic accuracy relative to single-source baselines, with the best model-level ensemble achieving a 2.9\% improvement over the best baseline ensemble. To assess predictive reliability, conformal prediction is applied to quantify coverage, prediction-set size, and abstention behavior. The results show that hybrid integration enhances uncertainty management, producing smaller and well-calibrated prediction sets at matched coverage levels. These findings demonstrate that lightweight physics-informed residuals, temporal augmentation, and ensemble learning can be combined effectively to improve both accuracy and decision reliability in nonlinear industrial systems.

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