Feature Learning for Fault Detection in High-Dimensional Condition-Monitoring Signals

Abstract

Complex industrial systems are continuously monitored by a large number of heterogeneous sensors. The diversity of their operating conditions and the possible fault types make it impossible to collect enough data for learning all the possible fault patterns. The paper proposes an integrated automatic unsupervised feature learning and one-class classification for fault detection that uses data on healthy conditions only for its training. The approach is based on stacked Extreme Learning Machines (namely Hierarchical, or HELM) and comprises an autoencoder, performing unsupervised feature learning, stacked with a one-class classifier monitoring the distance of the test data to the training healthy class, thereby assessing the health of the system. This study provides a comprehensive evaluation of HELM fault detection capability compared to other machine learning approaches, such as stand-alone one-class classifiers (ELM and SVM), these same one-class classifiers combined with traditional dimensionality reduction methods (PCA) and a Deep Belief Network. The performance is first evaluated on a synthetic dataset that encompasses typical characteristics of condition monitoring data. Subsequently, the approach is evaluated on a real case study of a power plant fault. The proposed algorithm for fault detection, combining feature learning with the one-class classifier, demonstrates a better performance, particularly in cases where condition monitoring data contain several non-informative signals.

References in corpus (3)

• Multi-Sensor Prognostics using an Unsupervised Health Index based on LSTM Encoder-Decoder
• Extended Comparisons of Best Subset Selection, Forward Stepwise Selection, and the Lasso
• Semi-supervised Learning with Deep Generative Models for Asset Failure Prediction

Cited by in corpus (8)

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• Fully Learnable Deep Wavelet Transform for Unsupervised Monitoring of High-Frequency Time Series
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• Domain Adaptation for One-Class Classification: Monitoring the Health of Critical Systems Under Limited Information
• Deep learning models for predictive maintenance: a survey, comparison, challenges and prospect
• Learnable Wavelet Packet Transform for Data-Adapted Spectrograms
• A Comparison of Residual-based Methods on Fault Detection
• Canonical Polyadic Decomposition and Deep Learning for Machine Fault Detection