Developing Deep Learning Models for System Remaining Useful Life Predictions: Application to Aircraft Engines

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Published Oct 28, 2022
Timothy Darrah Andreas Lovberg Jeremy Frank Gautam Biswas Marcos Quinones-Gruiero

Abstract

Prognostics and health management (PHM) is an important part of ensuring reliable operations of complex safety- critical systems. System-level remaining useful life (RUL) estimation is a much more complex problem than making estimations at the component level, and system-level RUL methodologies remain sparse in the literature. Model-based approaches have traditionally worked in the past for components such as capacitors, MOSFETs, batteries, or hard-drives (to name a few examples), but developing high fidelity dynamics models of cyber physical systems that can be used to study the effects of multiple degrading components in the system remains a challenging task. Some initial work on model-based System RUL predictions was demonstrated in Khorasgani, et al [1], but, to generalize the system-level prognostics problem, we have to resort to pure data driven and hybrid approaches. In this work, we propose an end-to-end data- driven framework for developing deep learning models to predict remaining useful life of cyber physical systems operating under unknown faulty conditions. The raw data is organized with a data schema that improves the model development process and
down stream data analysis tasks. Due to the unknown faulty conditions, the raw sensor data is transformed into signals that expose the underlying degradation processes, which are then used for model development. Bayesian Optimization is used to tune the model parameters prior to training and validation. We show that this approach results in accurate predictions within 3 cycles to end of life (EOL). We demonstrate the effectiveness of our approach by applying it to the N-CMAPSS turbofan engine dataset recently released by NASA, which includes high fidelity degradation modeling, real world operating conditions, and a large set of fault operating modes.

How to Cite

Darrah, T., Lovberg, A., Frank, J., Biswas, G., & Quinones-Gruiero, M. (2022). Developing Deep Learning Models for System Remaining Useful Life Predictions: Application to Aircraft Engines. Annual Conference of the PHM Society, 14(1). https://doi.org/10.36001/phmconf.2022.v14i1.3304
Abstract 105 | PDF Downloads 65

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Keywords

system-level remaining useful life, prognostics and health management, deep learning, data management systems, N-CMAPSS

Section
Technical Papers

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