基于耦合特性的机电控制无级变速器速比控制

doi:10.13229/j.cnki.jdxbgxb20180717

摘要/Abstract

摘要：

对一种夹紧力可调的机电控制无级变速器（CVT）的结构和工作原理进行了详细的分析，说明了其速比和从动带轮夹紧力之间的耦合关系，建立了机电控制CVT电控电动执行机构的模型，制定了基于耦合特性的机电控制CVT速比控制策略。利用所建立的基于MATLAB/Simulink的机电控制CVT传动系统仿真模型，仿真对比了常规控制与基于耦合特性控制的控制效果，仿真结果表明：基于耦合特性的控制策略在速比增大时响应时间减少约14%；同时尽管机电控制CVT消耗的能量增加，但是汽车的动力性有所提高。

关键词: 流体传动与控制, 机电控制无级变速器, 耦合特性, 速比控制, 夹紧力控制

Abstract:

The structure and operating principle of the electro-mechanical continuously variable transmission (EMCVT) is analyzed. The coupling relation between the speed ratio and the driven pulley clamping force was illustrated and the model of the EMCVT actuator was developed. The speed ratio control strategy of the EMCVT was developed based on the coupling characteristic between the speed ratio and driven pulley clamping force. The control effect of this ratio control strategy was compared with that of conventional strategy using a simulation model of the EMCVT in MATLAB/Simulink. The results indicates that the response time of speed ratio is reduced by 14% when the speed ratio increases; and although the energy consumed by the EMCVT is increased, the vehicle dynamic performance is improved.

Key words: fluid transmission and control, electro-mechanical continuously variable transmission, coupling characteristic, speed ratio control, clamping force control

中图分类号:

TH137

刘俊龙,孙冬野,刘小军,尤勇. 基于耦合特性的机电控制无级变速器速比控制[J]. 吉林大学学报(工学版), 2019, 49(6): 1951-1958.

Jun-long LIU,Dong-ye SUN,Xiao-jun LIU,Yong YOU. Speed ratio control of electro⁃mechanical continuously variable transmission based on coupling characteristic[J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1951-1958.

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整车		EMCVT
参数	参数	参数	参数
整车质量/kg	1180	带轮锥角的一半	11°
车轮半径/m	0.274	速比变化范围	0.5~2.5
风阻系数迎风面积/m²	0.32 2.19	主从动轴间距/mm 金属带长度/mm	140 594
滚动阻力系数主减速比	0.018 5.9