Applied Machine Learning: Reconstruction of Spectral Data for the Classification of Oil-Quality Levels

Yıl 2019, Sayı: 5, 1 - 13, 21.06.2019

Marco Stang Martin Bohme Eric Sax

Öz

In
modern complex systems and machines - e.g., automobiles or construction
vehicles - different versions of a "Condition Based Service" (CBS)
are deployed for maintenance and supervision. According to the current state of
the art, CBS is focusing on monitoring of static factors and rules. In the area
of agricultural machines, these are for example operating hours, kilometers
driven or the number of engine starts. The decision to substitute hydraulic oil
is determined on the basis of the factors listed. A data-driven procedure is
proposed instead to leverage the decision-making process. Thus, this paper
presents a method to support continuous oil monitoring with the emphasis on
artificial intelligence using real-world spectral oil-data. The reconstruction
of the spectral data is essential, as a complete spectral analysis for the
ultraviolet and visible range is not available. Instead, a possibility of
reconstruction by sparse supporting wavelengths through neural networks is
proposed and benchmarked by standard interpolation methods. Furthermore, a classification
via a feed-forward neural network with the conjunction of Dynamic Time Warping
(DTW) algorithm for the production of labeled data was developed. Conclusively,
the extent to which changes in hyper-parameters (number of hidden layers,
number of neurons, weight initialization) affect the accuracy of the
classification results have been investigated.

Anahtar Kelimeler

Machine learning, Neural networks, Spectral analysis

Kaynakça

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