液压试验平台控制系统研究
发布时间：2019-03-25 10:32
【摘要】：液压元器件测试平台主要用于液压元器件的性能测试,并为其继续使用或更换提供试验参考数据。传统的液压测试平台采用“传感器+模拟二次仪表”的方式,手动操作,手工记录,工作量大,工作效率低,可靠性差。随着液压技术越来越广泛的应用,对高度自动化的液压元件测试系统的需求也日益增长。本文主要针对作为该类测试系统核心开发内容的控制系统进行研究。 本文首先根据测试平台人机交互频繁,对外界环境监视、控制量大的特点确定了以工控机作为上位机、PLC作为下位机的分布式基本体系结构。然后,采用用例分析技术建立系统的功能需要模型,以此作为进一步开发的依据。在需求分析的基础上,抽象出更具有普遍性的试验用软件人机交互模式,并且将其映射到基于西门子公司组态软件Wincc的上位机界面布局和系统功能设计。试验数据的处理、存储和打印报表则是通过Wincc操作Access数据库的方式来实现。接下来研究了如何上下位机协调实现多工况循环等典型功能,以及上下位机的命令、反馈和采集数据的交互协议。在下位机的PLC控制系统的设计研究中,首先根据试验平台各部分的空间分布特点和对控制系统的性能要求,选择CPU315-2PN/DP作为主站,ET200M作为从站,使用PROFIBUS-DP网络进行通讯的方式作为PLC系统的基本结构,然后通过综合考虑I/O信号、模块功能、存储容量等因素完成PLC的硬件选型。其后,采用模块化的方式进行PLC的软件系统设计。本文最后提出了一种在Wincc与PLC间通过采用原始数据变量进行通讯来实现的PLC高速数据采集的解决方案,可将Wincc中的数据采集时间由原来的250ms降低至20ms以下。 在实际工作中,根据上述设计分别编制了上位机和下位机程序,通过测试应用到实际系统中。
[Abstract]:Hydraulic component testing platform is mainly used for performance testing of hydraulic components and provides test reference data for its continued use or replacement. The traditional hydraulic testing platform adopts the way of "sensor simulating secondary instrument", manual operation, manual recording, large workload, low working efficiency and poor reliability. With the application of hydraulic technology more and more widely, the demand for highly automated testing system for hydraulic components is increasing day by day. This paper mainly focuses on the research of the control system, which is the core development content of this kind of test system. Firstly, according to the characteristics of frequent human-computer interaction, monitoring of external environment and large amount of control, this paper determines the basic distributed architecture of industrial computer as upper computer and PLC as lower computer. Then, the functional requirement model of the system is established by using use case analysis technology, which is used as the basis for further development. On the basis of requirement analysis, the more universal human-computer interaction model of test software is abstracted, and it is mapped to the interface layout and system function design of upper computer based on Siemens configuration software Wincc. The processing, storing and printing of the experimental data are realized by using Wincc to operate the Access database. Next, it studies how to coordinate and realize the typical functions such as multi-working cycle, and the interactive protocol of command, feedback and data collection between the upper and lower computers. In the design of the PLC control system of the lower computer, firstly, according to the spatial distribution characteristics of each part of the test platform and the performance requirements of the control system, CPU315-2PN/DP is chosen as the master station and ET200M as the slave station. The communication mode of PROFIBUS-DP network is used as the basic structure of PLC system, and then the hardware selection of PLC is completed by considering the factors such as I / O signal, module function, storage capacity and so on. After that, the software system of PLC is designed by modularization. At the end of this paper, a solution of PLC high-speed data acquisition between Wincc and PLC is proposed, which can reduce the data acquisition time of Wincc from the original 250ms to less than 20ms by using the original data variables to communicate with each other. In the actual work, according to the above design, the upper computer and the lower computer program are programmed, and applied to the actual system through the test.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137;TP273
本文编号：2446891
[Abstract]:Hydraulic component testing platform is mainly used for performance testing of hydraulic components and provides test reference data for its continued use or replacement. The traditional hydraulic testing platform adopts the way of "sensor simulating secondary instrument", manual operation, manual recording, large workload, low working efficiency and poor reliability. With the application of hydraulic technology more and more widely, the demand for highly automated testing system for hydraulic components is increasing day by day. This paper mainly focuses on the research of the control system, which is the core development content of this kind of test system. Firstly, according to the characteristics of frequent human-computer interaction, monitoring of external environment and large amount of control, this paper determines the basic distributed architecture of industrial computer as upper computer and PLC as lower computer. Then, the functional requirement model of the system is established by using use case analysis technology, which is used as the basis for further development. On the basis of requirement analysis, the more universal human-computer interaction model of test software is abstracted, and it is mapped to the interface layout and system function design of upper computer based on Siemens configuration software Wincc. The processing, storing and printing of the experimental data are realized by using Wincc to operate the Access database. Next, it studies how to coordinate and realize the typical functions such as multi-working cycle, and the interactive protocol of command, feedback and data collection between the upper and lower computers. In the design of the PLC control system of the lower computer, firstly, according to the spatial distribution characteristics of each part of the test platform and the performance requirements of the control system, CPU315-2PN/DP is chosen as the master station and ET200M as the slave station. The communication mode of PROFIBUS-DP network is used as the basic structure of PLC system, and then the hardware selection of PLC is completed by considering the factors such as I / O signal, module function, storage capacity and so on. After that, the software system of PLC is designed by modularization. At the end of this paper, a solution of PLC high-speed data acquisition between Wincc and PLC is proposed, which can reduce the data acquisition time of Wincc from the original 250ms to less than 20ms by using the original data variables to communicate with each other. In the actual work, according to the above design, the upper computer and the lower computer program are programmed, and applied to the actual system through the test.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137;TP273
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