干式双离合器换挡接合规律及其控制仿真研究

发布时间：2018-02-26 07:20

本文关键词： 干式双离合器接合规律仿真分析　出处：《上海交通大学》2013年硕士论文　论文类型：学位论文

【摘要】：作为新型结构的自动变速器，双离合器式自动变速器（DCT）以兼具较高的传动效率及优良的换挡品质，，在汽车传动技术领域一度成为研究热点。且由于其对手动变速器良好的继承性，DCT适于我国生产制造背景，具备开发意义。论文围绕国家自然科学基金项目“基于换挡品质与使用寿命动态综合最优的干式双离合器控制理论研究”，针对自主研发的DCT系统展开优化离合器接合方面的研究，主要研究工作如下：提出一种常开式干式双离合器系统，在分析其结构特点和工作原理的基础上，建立了干式双离合器、干式双离合器执行系统及摩擦片传递转矩特性的模型。并详细分析了动力传递路线，建立换挡过程中的运动学方程，为研究换挡接合过程提供理论基础。以一挡升二挡为例，利用已建立的Simulink仿真模型，对双离合器换挡接合过程进行了仿真计算，并通过仿真结果，定性分析了控制转矩分配的变化方式对车辆性能的影响。在建立执行机构模型及优化接合过程转矩分配规则基础上，针对控制要求，设计执行机构丝杆位移控制器。提出摩擦片磨损量辨识算法，结合经典PID方法，通过调整执行系统实现对摩擦片摩擦量的自补偿，精确输出离合器目标转矩。本文的研究对开发具有我国自主知识产权的干式双离合器自动变速器，加快产业化进程具有重要的促进意义。
[Abstract]:As a new type of automatic transmission, double clutch automatic transmission (DCT) has high transmission efficiency and excellent shift quality. It has become a research hotspot in the field of automobile transmission technology, and it has the significance of development because of its good inheritance to manual transmission and its adaptability to the background of production and manufacture in our country. This paper focuses on the project of National Natural Science Foundation of China, "Research on the dry double clutch control theory based on the dynamic optimization of gear shifting quality and service life", aiming at the self-developed DCT system, the research on the optimization of clutch engagement is carried out. The main work of the study is as follows:. This paper presents a kind of open dry double clutch system. Based on the analysis of its structure and working principle, the dry double clutch is established. The model of torque characteristic of dry double clutch and friction plate is presented. The dynamic transfer route is analyzed in detail, and the kinematics equation is established, which provides a theoretical basis for the study of shift joint process. Taking the first gear and second gear as an example, using the established Simulink simulation model, the simulation calculation of the double clutch shift joint process is carried out. Through the simulation results, the influence of the changing mode of the control torque distribution on the vehicle performance is qualitatively analyzed. On the basis of establishing the actuator model and optimizing the torque distribution rules of the joint process, a screw rod displacement controller of the actuator is designed according to the control requirements. A friction plate wear identification algorithm is proposed, which is combined with the classical PID method. The target torque of clutch can be accurately output by adjusting the execution system to realize the self-compensation of friction volume of friction disc. The research in this paper is of great significance to develop the dry double clutch automatic transmission with our own intellectual property rights and accelerate the industrialization process.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U463.211

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