Journal
ENERGY
Volume 244, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2021.122569
Keywords
Proton exchange membrane fuel cells (PEMFCs); Sparse pseudo-input Gaussian process (SPGP); Variational auto-encoded deep Gaussian process (VAE-DGP); Data-driven model; Degradation prognosis
Categories
Funding
- National Nature Science Foundation of China [52107074]
- Sichuan Science and Technology Program [2020JDJQ0037]
Ask authors/readers for more resources
This paper proposes a Gaussian process regression modeling framework to predict the aging trajectory of PEMFCs and improve the prediction accuracy by handling model uncertainty. Experimental results demonstrate that the proposed methods outperform other data-driven methods in both large data and small data regimes.
The aging trajectory prognosis is an effective tool to prolong the lifespan and lower the cost of proton exchange membrane fuel cell (PEMFC) systems. In this paper, Gaussian process regression modeling frameworks based on sparse pseudo-input Gaussian process (SPGP) and variational auto-encoded deep Gaussian process (VAE-DGP) are proposed to predict the degradation trend and cope with model un-certainty for PEMFCs. The optimal hyper parameters and pseudo-input locations are obtained with conjugate gradient by maximizing the marginal likelihood. Besides, the variational parameters and closed-form variational lower bound are optimized through variable inference, radial basis function (RBF) kernel is utilized to determine the priori distribution of Gaussian process. Then stack voltage and output power are extracted as health indicators (HIs). To fully demonstrate the prediction performance, long-term experimental validation with static and dynamic aging tests are performed, single-input and multi-input structures are respectively constructed in SPGP and VAE-DGP for comparison with the existing models. The results show that the proposed methods outperform other data-driven methods, moreover, SPGP is more suitable for large data regime and VAE-DGP operates better with small data regime. Finally, the performance evolution is presented with 95% confidence interval to validate the mapping accuracy and reliability further. (c) 2021 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available