In order to predict the sealing quality of the differential assembly of forestry timber tranpsort vehicle trucks beforehand and improve the quality of its products and the assembly qualification rate, a prediction model based on grey correlation analysis algorithm combined with particle swarm (PSO) optimized BP neural network is proposed. The key assembly process parameters affecting the sealing quality of differential assembly screened out by the grey correlation analysis algorithm are taken as input variables, and the leakage value of differential assembly is taken as output variable to create a prediction model based on particle swarm algorithm optimized BP neural network, and the results show that the PSO-BP prediction method simplified by the grey correlation analysis obtains the smallest average relative error of 1.18%. On this basis, PyQt5 GUI library is applied to develop a differential assembly leakage value prediction system. The results of the study can provide a theoretical basis for the prediction of differential assembly sealing quality.
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