双离合器自动变速器换挡控制与动力学分析

Shifting Control and Dynamics Analysis of Dual Clutch Transmission

针对以往双离合器自动变速器(DCT)换挡控制模型未考虑驾驶员意图和DCT结构复杂性的问题,基于DCT结构与原理,建立了发动机与离合器模型,对汽车换挡过程进行动力学分析;并通过模糊控制理论,实现对驾驶员意图的分析与识别。分别从动力性和经济性出发,制定了基于驾驶员意图的换挡规律、DCT换挡过程中离合器与发动机的控制策略以及换挡综合控制逻辑,并在MATLAB/Simulink仿真平台上搭建了汽车换挡仿真模型。仿真结果表明:所搭建的换挡仿真模型满足要求,所制定换挡控制策略具有良好的控制效果。

Aimed at the complex of DCT structure and not considering the driver intention by DCT shift control model, and according to the DCT structure and principle,the dynamic shifting process of DCT has been analyzed, with the engine and clutch model established. The driver intention has been analyzed and distinguished through the fuzzy control theory, on this basis, gear shift rule has been formulated based on driver intention, separately from the power performance and economy per- formance. Clutch and engine control strategy for DCT shifting process have been proposed, and shifting control logic also has been drawn up. DCT shifting simulation model has been established based on the MATLAB/Simulink software simulation platform. The simulation result shows that the shifting simulation model in this study meets the requirement, and the shifting control strategy has a good control effect.