基于NSGA-Ⅱ算法和模糊控制的纯电动汽车2DCT换挡规律研究

doi:10.19562/j.chinasae.qcgc.2022.10.012

Abstract

Abstract:

Shift schedule is a key factor affecting the economy and power performance of vehicle.For the independently developed two gear dry dual clutch transmission （2DCT） of pure electric vehicle， taking the shifting speed under different pedal opening as the optimization variable， the Pareto front of the shifting speed is obtained by NSGA-Ⅱ algorithm，and the shift schedule considering both economy and power performance of pedal opening and speed is obtained by linear weighting method. A three-parameter fuzzy controller is constructed by introducing in acceleration to dynamically adjust the shifting speed， and the comprehensive shifting schedule is obtained. The results show that the comprehensive shift schedule can take into account the economy and power performance of the vehicle simultaneously， and reduce the shift frequency greatly compared with the economic shift schedule.

Key words: pure electric vehicle, two gear dry dual clutch transmission, shift schedule, NSGA-Ⅱ algorithm, fuzzy control

Xuebing Yin,Yong Chen,Qinglin Dai,Hai Liu,Naili Tian,Bolin He. Study on Shift Schedule of 2DCT for Pure Electric Vehicle Based on NSGA-Ⅱ Algorithm and Fuzzy Control[J].Automotive Engineering, 2022, 44(10): 1571-1580.

Figures/Tables 28

References 20

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踏板开度α/%	换挡速度v/（km·h^-1）
20	84.45
40	92.98
60	96.49
80	99.22
100	101.55

踏板开度α/%	换挡速度v/（km·h^-1）
20	51.03
40	66.51
60	73.22
80	77.35
100	78.97

踏板开度α/%	换挡速度v/（km·h^-1）
20	61.21
40	75.32
60	82.66
80	83.37
100	85.70

名称	数值	单位
整车整备质量m	1 758	kg
风阻系数C_D	0.302
滚动阻力系数f	0.015
车轮半径r	0.31	m
旋转质量换算系数δ₁/δ₂	1.10/1.05
迎风面积A	2.19	m²

项目	能耗/（kW·h）	换挡频率
动力性换挡规律	3.35	4
经济性换挡规律	3.21	40
综合性换挡规律	3.27	28

Study on Shift Schedule of 2DCT for Pure Electric Vehicle Based on NSGA-Ⅱ Algorithm and Fuzzy Control

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