基于极端学习机的质子交换膜燃料电池剩余寿命预测

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本文探讨了基于极端学习机(Extreme Learning Machine, ELM)的质子交换膜燃料电池(Proton Exchange Membrane Fuel Cell, PEMFC)剩余使用寿命(Remaining Useful Life, RUL)估计方法。在当前对设备可靠性和安全性要求日益提高的背景下,预测设备的RUL是故障诊断与健康管理(Prognostics and Health Management, PHM)中的关键环节,尤其是在燃料电池这类新兴电子系统中。 PEMFC因其高效能和环保特性,在电力领域表现出巨大潜力。作者针对IEEE PHM 2014数据挑战中提供的PEMFC数据集进行研究,旨在通过对燃料电池性能衰减趋势的分析,构建基于ELM的退化模型。ELM作为一种单隐藏层前馈神经网络(Single-hidden Layer Feed-forward Neural Networks, SLFNs)的学习算法,其简单易用且能够处理复杂非线性问题,使其成为适合处理此类问题的工具。 首先,研究团队通过深入挖掘数据,揭示了PEMFC在运行过程中发生的各种影响因素,如温度、压力和电流等,这些都可能影响燃料电池的性能和寿命。然后,他们运用ELM算法对这些影响因素进行了建模,通过学习和理解这些关系,得以捕捉到燃料电池的内在退化模式。 在模型构建完成后,文章着重展示了如何利用该模型进行实际的RUL预测。通过将实时监测到的运行参数输入到训练好的ELM模型中,可以得到燃料电池剩余使用寿命的估计值。这种方法不仅有助于预测故障发生的可能性,还能为维护决策提供提前预警,从而优化维护策略,避免突发故障对系统造成的影响。 最后,作者验证了所提出方法的可行性和有效性,通过对比实验结果与实际使用寿命,证明了ELM在PEMFC RUL估计方面的良好性能。结论部分强调了这种基于ELM的RUL估算方法在提高PEMFC系统可靠性及降低运营成本方面的潜力,为进一步的研究和实际应用提供了新的视角和途径。

With the rapid development of China's economy, the per capita share of cars has rapidly increased, bringing great convenience to people's lives. However, with it came a huge number of traffic accidents. A statistical data from Europe shows that if a warning can be issued to drivers 0.5 seconds before an accident occurs, 70% of traffic accidents can be avoided. Therefore, it is particularly important to promptly remind drivers of potential dangers to prevent traffic accidents from occurring. The purpose of this question is to construct a machine vision based driving assistance system based on machine vision, providing driving assistance for drivers during daytime driving. The main function of the system is to achieve visual recognition of pedestrians and traffic signs, estimate the distance from the vehicle in front, and issue a warning to the driver when needed. This driving assistance system can effectively reduce the probability of traffic accidents and ensure the safety of drivers' lives and property. The main research content of this article includes the following aspects: 1. Implement object detection based on the YOLOv5 model. Conduct research on convolutional neural networks and YOLOv5 algorithm, and develop an object detection algorithm based on YOLO5. Detect the algorithm through road images, and analyze the target detection algorithm based on the data returned after training. 2. Estimate the distance from the front vehicle based on a monocular camera. Study the principle of estimating distance with a monocular camera, combined with parameters fed back by object detection algorithms, to achieve distance estimation for vehicles ahead. Finally, the distance estimation function was tested and the error in the system's distance estimation was analyzed. 3. Design and implementation of a driving assistance system. Based on the results of two parts: target detection and distance estimation, an intelligent driving assistance system is constructed. The system is tested through actual road images, and the operational effectiveness of the intelligent driving assistance system is analyzed. Finally, the driving assistance system is analyzed and summarized.

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