车辆液力机械传动系统换挡过程动态特性仿真  

Dynamic Simulation of a Hydromechanical Transmission System during Gearshifting

作　　者：冯能莲[1] 郑慕侨[1] 马彪[1] 

机构地区：[1]北京理工大学车辆与交通工程学院,北京市100081

出　　处：《农业机械学报》2001年第3期15-19,共5页Transactions of the Chinese Society for Agricultural Machinery

摘　　要：为研究车辆液力机械传动系统换挡过程的动态特性 ,基于动力换挡离合器及其液压控制系统的结构和工作原理 ,建立了车辆动力传动系统的动力学模型 ,并进一步分析建立了各组成部分的数学模型。在 Matlab/Simulink图形建模环境的支持下建立了车辆动力传动系统的仿真模型。仿真结果表明 ,该模型能够有效地模拟车辆液力机械传动系统换挡的动态过程 ,可以用来预测系统的性能 。A power-shift clutch is one of the key components in a hydromechanical transmission system that includes torque converter, power-shift clutches, mechanical gearshift device and continuously steering mechanism, etc. During gearshifting, the output torque perturbation, which caused by the friction torque of the clutch, produces a dynamic load. The friction torque of the clutch is affected by the friction coefficient and the control oil pressure when the configuration parameters of the clutch are unchanged. The hydromechanical transmission system completes gearshift by changing different clutches. Based on the physical and the mathematical models, a dynamic simulation model was developed in the paper by using the Matlab/Simulink toolbox. It can simulate the dynamic performance effectively when two clutches change their duties (offgoing and oncoming). With the help of the simulation model, the designer can predict the performance of the production during design process. It lays a foundation for improving the configuration of a clutch and designing a control system.

关 键 词：液力机械传动系 变速换挡机构 动态特性 仿真 车辆 

分 类 号：U463.22[机械工程—车辆工程]