机械电子式无级变速器控制系统的硬件在环仿真平台开发

发布时间：2019-03-21 13:27

【摘要】：随着科学技术的发展,无级变速器(CVT)越来越多的应用于现代汽车。本课题以纯机械电子式无级变速器EMCVT (Electronic Mechanical Continuously Variable Transmission)为研究对象,抛弃了不够理想的液压系统,具有很大的研究价值和发展空间。为了能够使EMCVT发挥其功效,需要开发一套使EMCVT汽车具有良好操控性、驾驶舒适并具有理想的动力性和燃油经济性的控制系统。根据EMCVT机械结构和变速原理,控制系统就是要控制速比控制电机和离合器控制电机。 EMCVT控制系统调试最简单有效的方式,就是将EMCVT直接安装到试验台架和汽车上进行实验,但是台架试验和车载试验的试验周期都比较长,需要的试验设备多,成本很高,不利于控制系统的改进,而且现场试验难实现一些极端情况,甚至会有一些危险发生。因此,本文根据现场试验情况通过对硬件在环仿真(Hardware-in-the-loop Simulation-HILS)理论的研究,开发了用于EMCVT控制系统初期调试的硬件在环仿真试验平台(HILSP),它为控制系统提供了虚拟调试环境,使得控制系统初期调试只需要在实验室就能够完成。本课题来源于辽宁省科学技术计划工业攻关重点项目：车用无级变速器实验与控制关键技术攻关,并根据EMCVT的控制系统和现场的台架试验和车载试验,本文首先分析了EMCVT的机械结构,同时根据机械结构和试验数据建立了发动机模型、EMCVT模型、汽车负载模型,并在Matlab/Simulink中验证这些模型的可行性,用数学模型实现控制系统的离线调试。其次,通过对硬件在环仿真理论的研究,本文编写了基于LabVIEW的硬件在环仿真程序,使仿真程序与控制系统实现实时通讯,具有控制系统调试功能。最后,编写友好的硬件在环仿真程序人机交互界面,方便、清晰的显示出当前车载试验状态,并通过仿真试验分析了开发的硬件在环仿真平台能够满足控制系统需求,达到控制系统初期调试目的。
[Abstract]:With the development of science and technology, continuously variable transmission (CVT) is more and more used in modern automobile. This subject takes the pure mechanical electronic stepless transmission EMCVT (Electronic Mechanical Continuously Variable Transmission) as the research object, abandons the not ideal hydraulic system, has the great research value and the development space. In order to enable EMCVT to play its role, it is necessary to develop a set of control system which can make EMCVT car have good handling, comfortable driving and ideal power and fuel economy. According to EMCVT mechanical structure and variable speed principle, the control system is to control the speed ratio control motor and clutch control motor. The simplest and effective way to debug the EMCVT control system is to install the EMCVT directly on the test bench and the automobile to carry on the experiment, but the test period of the bench test and the on-board test is relatively long, the test equipment required is more, and the cost is very high. It is not conducive to the improvement of the control system, and the field test is difficult to achieve some extreme situations, and even some dangers occur. Therefore, according to the field test, the hardware-in-the-loop simulation (Hardware-in-the-loop Simulation-HILS) theory is studied, and the hardware-in-loop simulation test platform (HILSP),) is developed for the initial debugging of EMCVT control system. It provides a virtual debugging environment for the control system, so that the initial debugging of the control system only needs to be completed in the laboratory. This topic comes from the key project of Liaoning province science and technology plan industrial key problem: vehicle CVT experiment and control key technology, and according to EMCVT control system and field bench test and on-board test, In this paper, the mechanical structure of EMCVT is firstly analyzed, and the engine model, EMCVT model and vehicle load model are established according to the mechanical structure and test data, and the feasibility of these models is verified in Matlab/Simulink. The off-line debugging of control system is realized by mathematical model. Secondly, through the research of hardware-in-loop simulation theory, the hardware-in-the-loop simulation program based on LabVIEW is compiled in this paper, which makes the simulation program communicate with the control system in real time and has the debugging function of the control system. Finally, the friendly man-machine interface of hardware-in-the-loop simulation program is compiled to display the current vehicle test status conveniently and clearly. The hardware-in-the-loop simulation platform developed can meet the requirements of the control system through simulation experiments. Achieve the purpose of initial debugging of the control system.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.46;TP273

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