Revision as of 12:27, 23 November 2022

Summary

With the increasing availability of data for Prognostics and Health Management (PHM), Deep Learning (DL) techniques are now the subject of considerable attention in Prognostics for Predictive Maintenance, achieving more accurate Remaining Useful Life (RUL) predictions. However, one of the major challenges for DL techniques resides in the difficulty of obtaining large amounts of labeled data on industrial systems. To overcome this lack of labeled data, an emerging learning technique is considered in this work : Self-Supervised Learning, a sub-category of unsupervised learning approaches. This paper aims to investigate whether pre-training DL models in a self-supervised way on unlabeled sensors data can be useful for downstream tasks in PHM (i.e. RUL estimation) with only limited amount of labelled data. A synthetic dataset composed of strain data is used. Results show that the self-supervised pretrained models significantly outperform the non pre-trained models in downstream Remaining Useful Life (RUL) prediction task, showing promising results in prognostic tasks when only limited labeled data is available.