商用车变速箱换挡性能试验台架开发

发布时间：2018-02-15 12:46

本文关键词： 变速箱换挡性能试验换挡力换挡位移 PLC　出处：《重庆大学》2016年硕士论文　论文类型：学位论文

【摘要】：变速箱的换挡性能是考核变速箱综合实用性能的重要指标,变速箱换挡性能试验是汽车机械式变速箱台架试验的重要项目,用选换挡机械手进行各挡位的选换,记录变速箱选换挡力和时间、位移和时间的关系,以分析与评价变速箱的选换挡性能。论文结合重庆“121”商用车变速器科技支持示范工程项目“商用车变速器协同创新与关键技术攻关”,查阅国内外相关文献资料,分析对比市场上现有的机械式变速箱换挡性能试验台架的结构形式和控制方案,结合需方的具体要求,搭建了机械式变速箱换挡性能试验台架硬件平台,并对测控系统软件进行了开发。论文首先对机械式手动变速箱的换挡过程进行了理论分析,建立了同步器同步过程的数学模型,为后续控制方法的确定和试验结果的分析提供了理论依据。其次对试验台架的整体方案进行了说明,将整个试验台架划分成驱动部分、换挡执行部分和测量控制部分三大模块,确定了各部分的实现方式及硬件选型。然后对驱动电机和换挡执行伺服电机的控制方法进行了分析,并根据控制方法详细交代了G120变频器和V90驱动器的配置过程,以及各硬件之间的电气连接。对控制系统的下位机PLC程序和采用LabVIEW编写的上位机界面进行了简要介绍,并交代了上下位机之间的OPC通信配置及创建的共享变量。最后,确定了某型号变速箱的试验流程,在搭建好的试验台架上进行换挡性能试验,并对实验结果进行了分析,验证了试验台架初步发到设计要求。
[Abstract]:The gearshift performance of the gearbox is an important index to assess the comprehensive and practical performance of the gearbox. The gearshift performance test of the gearbox is an important item in the test of the automobile mechanical gearbox. Record the relationship between gearbox shift force and time, displacement and time, In order to analyze and evaluate the gearshift performance of the gearbox, the paper combines the Chongqing "121" commercial vehicle transmission science and technology support demonstration project "commercial vehicle transmission cooperative innovation and key technology research", and consults the domestic and foreign related literature data. This paper analyzes and compares the structure form and control scheme of the existing mechanical gearbox shift performance test bench in the market, and builds the hardware platform of the mechanical gearbox shift performance test bench according to the specific requirements of the demand side. The software of measurement and control system is developed. Firstly, the shift process of mechanical manual gearbox is analyzed theoretically, and the mathematical model of synchronous process of synchronizer is established. It provides a theoretical basis for the determination of the control method and the analysis of the test results. Secondly, the overall scheme of the test-bed is explained, and the whole test-bed is divided into three modules: the driving part, the gear shifting executive part and the measuring control part. The realization mode and hardware selection of each part are determined. Then, the control methods of driving motor and gear shifting executive servo motor are analyzed, and the configuration process of G120 frequency converter and V90 driver is explained in detail according to the control method. The PLC program of the control system and the upper computer interface written by LabVIEW are briefly introduced, and the configuration of OPC communication between the upper and lower computers and the shared variables created between the upper and lower computers are explained. The test flow of a certain type of gearbox is determined, and the shift performance test is carried out on the set up test stand, and the experimental results are analyzed, and the preliminary design requirements of the test stand are verified.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U467.523

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