双离合自动变速器车辆起步品质模糊综合评价模型及其敏感度分析

针对双离合自动变速器(Dual Clutch Transmission,DCT)车辆起步品质主观评价结果难以精确量化,以及客观评价模型中评价结果稳定性衡量问题,提出了起步品质模糊综合评价模型及其敏感度分析方法。分析DCT车辆起步过程中离合器的结合过程,确立了起步品质评价指标;使用熵权法对指标进行赋权,研究正态分布和梯形分布隶属度函数建立方法,共同构建DCT车辆起步品质模糊综合评价模型;提出起步品质模糊综合评价模型指标灵敏度分析方法作为评价结果稳定性的衡量依据。试验结果表明,使用正态分布隶属度函数的模糊综合评价模型得到的评价结果对指标的扰动敏感度低、评价结果稳定性高,为起步品质模糊综合评价隶属度函数的选择提供了一定的参考依据。

Research on Fuzzy Comprehensive Evaluation and Sensitivity Analysis of Starting Quality of Dual Clutch Transmission Vehicles

In order to more accurately quantify the subjective evaluation of starting quality of dual clutch transmission (DCT) vehicles and to measure the stability of the objective evaluation results, a fuzzy comprehensive evaluation model and the corresponding sensitivity analysis method were proposed. The clutch combining process was analyzed when starting the DCT vehicle and then the starting quality evaluation index was established. The construction of Gaussian membership function and trapezoidal membership function was studied, and the fuzzy comprehensive evaluation model of starting quality of DCT vehicles was built by using entropy weight method. Finally the index sensitivity analysis method in the evaluation model was put forward as the measurement basis for stable evaluation. The experimental results show that the fuzzy comprehensive evaluation model using the Gaussian membership function has lower sensitivity to disturbance with highly stable evaluation results. The paper provides a reference for the selection of membership function in fuzzy comprehensive evaluation.