| Automotive brakes are the key components of the vehicle braking system,which directly determine the driving safety and reliability of the vehicle.Friction pads,as important parts of disc brakes and drum brakes,are also the main parts that provide braking force during the braking process.A large percentage of accidents caused by vehicles that fail to provide effective braking are caused by the poor performance of the friction pads,and an accurate assessment and prediction of the performance of the brake pads is one of the means to reduce such accidents.The performance state of brake friction pads is greatly influenced by speed,load and other factors,and the study on the prediction of friction pad performance state considering the influence of multiple factors will have a positive effect on improving the rationality and accuracy of brake friction pad performance state prediction.This paper investigates the friction and wear theory and performance state prediction methods related to automotive brake friction pads,analyzes the relationship between the influencing factors and performance evaluation indexes,and carries out research on the prediction of the performance state of automotive brake friction pads under the influence of multiple factors to accurately and comprehensively reflect the performance state of automotive brake friction pads.The main research contents of this paper are as follows:The friction form and the composition of friction force involved in the braking process of brake friction pads are analyzed,and the types and stages of wear of brake friction pads are also analyzed.Through theoretical analysis and finite element simulation analysis of the brake friction pad performance state,the performance influencing factors and performance evaluation indexes of the brake friction pad are determined.Based on the analysis of brake friction pad influencing factors and performance evaluation indexes,the influence of influencing factors on friction pad performance evaluation indexes is studied by analyzing the friction and wear performance of a certain type of friction pad,giving the trend and mechanism of the influence of speed and other factors on friction pad performance evaluation indexes,and establishing the relationship model between each influencing factor and performance evaluation indexes based on the least squares method.A method for predicting the performance state of automobile brake friction plate under the action of multiple factors based on Evidence Reasoning(ER)algorithm is proposed.In order to predict the performance state of automotive brake friction pads more accurately and reasonably,the relationship model between speed and other factors and friction pad performance evaluation indexes based on the least squares method is combined,and the influence of each influencing factor on the performance evaluation index is considered to establish a prediction model of brake friction pad performance state based on the Evidence Reasoning algorithm to improve the prediction accuracy of friction pad performance state under the influence of multiple factors.Finally,we designed and developed the automotive brake friction pad performance state prediction software to improve the human-computer interaction for the performance state prediction of automotive brake friction pads. |
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