Adaptative data-driven approach for the remaining useful life estimation when few historical degradation sequences are available
Résumé
Fault prognostics is the estimation of the Remaining Useful Life (RUL) of a component until failure. It is a main part of the predictive maintenance strategy that can help to enhance the reliability and availability of industrial systems while reducing unscheduled downtime and maintenance cost. Applying fault prognostics to industrial systems is difficult because very few sequences about degradation are available. Hence, this paper proposes a new approach able to perform the fault prognostics when few historical degradation data are available. In offline, a library of Health Indicators (HIs) and library of adaptive models are defined. Then, the best HI-model pairs according to the accuracy of the a priori sequences are selected. In online, several RULs are predicted for the new sequence using the selected pairs. After that, the final RUL is computed by merging the RULs using a weighted mean. The approach is validated using a degradation scenario selected from an aircraft engine degradation dataset (CMAPSS dataset). The obtained results are promising compared to some well-known similar state-of-the-art approaches.