Sharif University of Technology Scientia Iranica 1026-3098 32 16 2026 09 01 Prediction of particulate content in oil based on successive projections algorithm vibration feature selection 24229 10.24200/sci.2022.58252.5640 EN Liu Ge School of Environmental Engineering, North China Institute of Science and Technology, Hebei, China. Chen Bin School of Mechanical and Electrical, Hebei Key Laboratory of Safety Monitoring of Mining Equipment, North China Institute of Science and Technology, Hebei, China. Journal Article 2021 05 05 Aiming at the non-stationary characteristics of oil pressure vibration signals containing particulates, a method for predicting particulate content in oil was proposed based on vibration characteristic frequency extraction by Vibrational Mode Decomposition (VMD), variable selection using the Successive Projections Algorithm (SPA), and T_S fuzzy identification combined. Firstly, the pressure vibration signal was decomposed by VMD, and a series of narrow-band characteristic frequency matrices were obtained. Then, variables were selected using SPA to construct the feature vector matrix. Finally, the feature vector matrix was used as the input to T_S fuzzy identification to identify the content of particulates in oil. The results showed that the VMD reconstruction of the original oil sample pressure signals could well characterize the main variation of the original signal; the 19 variables were selected from the characteristic frequency of the vibration signal from the oil pressure using SPA, the 19 pressure vibration characteristic frequency of 11 sample sets SPA selected was taken as the input variable of T_S identification model; for each set of sample, the predicted output of the content of particulate in oil was obtained, model prediction decision coefficient is 0.8637, the Root Mean Square Error (RMSE) is 0.1979, a reasonable prediction effect was obtained. https://scientiairanica.sharif.edu/article_24229_b33a9a04d42c1cea6f461caa4f68c964.pdf