【作者】 刘燕；

【导师】 张镭；

【作者基本信息】 东北大学 ， 机械制造及其自动化， 2009， 硕士

【摘要】 金属带式无级变速器(CVT)因其结构简单、成本低廉、使用寿命长以及容易实现动力传动系的综合控制,能够充分地发挥发动机的特性,更好地提高汽车的燃油经济性、动力性、驾驶舒适性及行驶平顺性,所以一直是人们追求的目标。目前的无级变速器均采用液压系统对锥盘加压实现变速控制,本文研究对象纯机械电子式无级变速器(EMCVT),运用滚动螺旋机构对锥盘加压,利用电子控制机械调速机构进行调速,抛弃了耗能的液压系统,显著降低了汽车油耗、变速器制造成本和故障率。具有极大的研究意义和实用价值。本文主要针对EMCVT控制系统和试验进行了如下研究：(1)对EMCVT结构和原理进行了深入研究,明确控制目标。(2)完成了EMCVT控制器主控电路的原理设计与电路板以及主控制箱的制作。(3)完成了电机驱动模块电路原理设计与驱动模块控制箱的制作。(4)完成了EMCVT手动控制箱设计与制作。(5)对汽车起步时离合器的控制策略进行了深入研究,设计出了离合器起步控制的模糊控制器,其中包括控制规则建立,控制总表的制定,程序流程图绘制。(6)根据发动机台架试验数据,建立了发动机扭矩、功率和油耗模型,并由此获得了该型号发动机的最佳经济曲线和最佳动力曲线,最终获得了最佳经济和动力目标速比图,为EMCVT的控制提供了理论数据。(7)对EMCVT速比控制策略进行了深入研究,提出了目标速比跟踪数字PID控制算法,并提出了改进的PID控制算法,即积分分离和微分先行PID算法。(8)根据试验要求设计和搭建了EMCVT手动控制试验台,并进行相关试验。(9)根据该无级变速器的控制特点以及对其开发和定性、定量调试的要求,设计、搭建了EMCVT台架试验台。(10)进行了EMCVT台架试验,验证了EMCVT机械结构的功能性和合理性,验证了控制系统的可行性及合理性。更多还原

【Abstract】 Metal Pushing Belt Continuously Variable Transmission (CVT) has the advantage of simple structure, low cost, long life and easy for integrated control, can give full play of engine’s characteristic, can improve the gas efficiency, driving force, driving comfort and ride performance and so on. So CVT is always the pursuing by people. Nowadays, all CVT adopts hydraulic system to pressure on the cone-plate to control the speed ratio. In this paper, the Electronic Mechanical Continuously Variable Transmission adopts rolling screw mechanism to pressure on the cone-plate. And it uses electronic to control mechanical speed governor institutions to change the ratio. It Abandoned the wasting energy’s hydraulic system. So it reduced the auto’s consume of oil obviously, Transmission manufacturing costs and failure rate.So it has great significance on research and practical value.In this paper,mainly reserch on the control system and test of EM CVT as follows:(1) Made deeply research on the structure and principle of EMCVT, made clear on the control target.(2) Finished the design of circuit principle of main controller and making of circuit board and main contol box.(3) Finished the design of circuit principle of motor driving module and making of driving module contol box.(4) Finished design and making of manual control box and automatically control box of EMCVT.(5) Made deeply research on the control strategy of starting clutch, finished the fuzzy controller design of starting clutch, including establish of control rules and main control table.(6) Based on the data of engine experiment, established the numerical value model, power model and fuel consuming model. Based on these data and models, best economical target ratio and best driving target ratio could be calculated and provided to control system for EMCVT control. (7) Made deeply research on the EMCVT ratio control strategy. Put forward PIDcontrol algorithm of object speed ratio tracking and improved PID control algorithm.(8) Based on the experiment requirements, designed and made the manual controlexperiment table of EMCVT. And did related experiments.(9) Based on the control characteristic of EMCVT and the demand of EMCVT test,finished the design and making of EMCVT platform experiment table.(10) Finished platform experiment of EMCVT. Tested the functionality and rationalityof the mechanical structure of EMCVT. And tested the feasibility and rationality of controlsystem.更多还原