无级变速器减压回路压力脉动关键参数识别及优化验证

摘要/Abstract

摘要： 针对无级变速器独立液压系统的减压回路，建立液压模型，通过引入Sobol'灵敏度分析算法，在MATLAB/AMESim软件平台上，对减压回路压力脉动衰减关键参数进行灵敏度分析。一阶灵敏度及一阶全局灵敏度的分析结果显示，先导阻尼孔、减压阀节流槽及负载流量（等效负载阻尼孔）对压力稳定性影响最大，二阶灵敏度指标显示节流槽与负载流量间的耦合作用最强。根据分析结果，对实车压力脉动现象进行关键参数响应曲面优化，并通过试验结果说明此分析方法的有效性。

关键词: 无级变速器, 压力脉动, Sobol'灵敏度, 响应曲面法, 优化验证

Abstract: For the pressure reduction circuits of independent hydraulic systems of CVT, a hydraulic model was established. By introducing Sobol' sensitivity analysis algorithm, the key parameters of pressure fluctuation attenuation in pressure reduction circuits were analyzed on the platform of MATLAB/AMESim software. The results of first-order sensitivity and first-order total sensitivity analysis show that the pilot orifice, throttle groove of reduction valve and load flow (equivalent load orifice) have the greatest influences on pressure stability, and the second-order sensitivity index shows that the coupling effects between throttle groove and load flow are the strongest one. Finally, according to the analysis results, the response surface optimization of key parameters for pressure fluctuation during vehicle tests was carried out, and the validity of the analysis method was proved by the test results.

Key words: continuously variable transmission（CVT）, pressure fluctuation, Sobol' sensitivity, response surface methodology（RSM）, optimization verification

中图分类号:

TP137

罗威1;周云山1,2;瞿道海1;张飞铁1;胡哓岚1. 无级变速器减压回路压力脉动关键参数识别及优化验证[J]. 中国机械工程.

LUO Wei1;ZHOU Yunshan1，2;QU Daohai1;ZHANG Feitie1;HU Xiaolan1. Identification and Optimization Verification of Key Parameters for Pressure Fluctuations in Hydraulic Reduction Circuit of CVT[J]. China Mechanical Engineering.

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