双离合器自动变速器换挡特性与控制仿真

针对应用某履带车辆的双离合器自动变速器(DCT)换挡控制问题,首先提出系统动力传动方案,然后对升挡和降挡过程进行动力学和运动学分析,运用Matlab/Simulink建立传动系统的仿真模型.分别对某车辆升挡和降挡过程进行了仿真计算,仿真结果体现了车辆的换挡品质.在升挡过程中通过PID控制器控制高挡离合器的充油油压,在降挡过程中采用PI控制器控制发动机油门开度,这种控制策略可以使DCT换挡平稳,减少系统负转矩的产生,提高车辆的换挡品质.

Shift Dynamics and Control of Dual Clutch Transmissions

A DCT structure, which adopted on a certain tracked vehicle, was proposed and system dynamic equations were derived according to the detailed analysis of upshifts and downshifts. The analytical model for the simulation, analysis and control of shift dynamics for DCT vehicles was built by means of Matlab/Simulink. An upshift and a downshift were simulated as case study and simulation results displayed the parameters have important influence on shift quality. A PID controller was proposed to control the oil pressure in on-coming clutch in upshift process and a PI controller was also put forward to control oil throttle in downshift process. Such control strategies can avoid clutch tie-up and engine flare, result in better shift quality.