制动测功器模型预测由于制动盘厚度改变制动转矩的变化

Brake Dynamometer Model Predicting Brake Torque Variation Due To Disc Thickness Variation

本研究推荐制动系统测功器数学模型用来鉴定制动转矩的变化(BTV),并确定动态试验和仿真间的相互关系,介绍了衬垫和盘之间简单模拟,作为点接触元件以及在时间范围内瞬态响应分析。该模型指出BTV的总量与衬垫刚度,摩擦系数,制动盘厚度变化和制动衬垫的有效半径成线性正比例,采用-制动测力器和附加的材料试验进行证实分析模型,动态试验表明所推荐的模型对预测-制动系统BTV具有合理的精确度。

In this study,the mathematical model for a brake system in a dynamometer is proposed to identify brake torque variation （BTV）,and correlations between the dynamo test and simulation are determined.The interaction between the pads and the disc on the contact patch is simply modelled as a point-contact element and the transient response analysis in the time domain is introduced.The model indicates that the amount of BTV is linearly proportional to the pad stiffness,the friction coefficient,the disc thickness variation,and the effective radius of the brake pads.To verify the analytical model,a brake dynamometer is used and additional material tests are carried out.The dynamo test shows that the suggested model has reasonable accuracy in predicting the BTV of a brake system.