Research on Thrust Force Model of CFRP Drilling Based on Mechanism and Data Driving
In order to solve these two problems,the existing mechanism model has low accuracy due to multiple pa-rameters and large parameter value error,and the data model is simple to build but cannot reveal the drilling mechanism,a model of CFRP drilling axial force based on mechanism and data driving is carried out in this paper.The existing CFRP cut-ting force model is modified to obtain the thrust force mechanism model with wider applicability and higher accuracy.Based on neural network and experimental data,a compensator for prediction deviation of thrust force mechanism model is con-structed.The thrust force model of CFRP drilling is established by combining drilling mechanism and drilling data.It is proved that the new model can further improve the prediction accuracy based on the mechanism model:the mean relative er-ror of prediction is reduced by 8 times in the sample data set and 3 times in the random data set,respectively.
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