液压机控制系统研究与开发

【作者】 王万花；

【导师】 孙宇；

【作者基本信息】 南京理工大学 ， 机械制造及其自动化， 2009， 硕士

【摘要】 液压机是制品成形生产中应用最广泛的装备之一,根据市场的需求,液压机逐步向智能化、网络化方向发展。目前关于液压机智能化、网络化控制系统的研究都在积极的展开,并获得了成功的应用,同时也暴露出一些问题:一是系统的智能化程度较低,不具备故障诊断、维护功能;二是系统不具备网络联机功能,大部分仍属于单机控制系统。本文以16000KN拉伸液压机为研究对象,设计并开发了集智能化和网络化为一体的液压机控制系统。主要的研究内容如下:(1)根据液压机控制系统的需求,提出液压机控制系统总体设计方案,探讨控制系统的结构组成、网络体系,分析了智能控制系统与远程网络化控制系统两个子系统的工作原理及功能。(2)通过对液压机控制系统关键技术研究,结合液压机智能控制系统的功能需求,选择欧姆龙CJ1H系列可编程控制器(PLC)作为底层控制单元,选择研华公司TPC-1260T型工控机作为上位机单元,构建基于PLC和上位机两级控制的总体结构,完成控制系统的硬件结构设计。结合液压机智能化监控系统需求,从压边力、冲制速度、滑块位置等工艺参数的数字化控制以及液压机状态监控、故障诊断、系统维护方面进行研究,完成液压机控制系统的软件开发。(3)通过对液压机的运行中可能出现的各种故障进行分析,利用故障树模型(FTA)的知识组织方法存储知识,采用基于规则的诊断推理实现故障诊断推理,完成了液压机智能故障诊断专家系统的开发。(4)通过对液压机网络化控制系统研究,结合Internet/Intranet技术、信息技术、人工智能技术、自动化技术,开发了一套具有远程监测、智能故障诊断、在线交互式诊断、设备维护与管理等功能的远程服务系统,实现了液压机的网络化控制。经过多次测试,测试结果达到了预期设计目标。更多还原

【Abstract】 Hydraulic press is one of the most universal equipments in the production of molding. To satisfy the market demands, hydraulic press gradually moves towards intellectualization and networking. At present, studies on the intelligent and networked control system of hydraulic press have been actively done and already have some successful applications. However, with reference to previous work, some problems are exposed. One is the intellectualization of control system is at low level lacking functions of fault diagnosis or maintenance, the other is system have no networking capabilities, most of them are still at stand-alone state. In this paper, 16000KN hydraulic deep drawing press was considered as a research subject, a control system integrated with intellectualization and networking was designed and exploited. The main contents are as follows:(1) According to the functional requirements, the general design of the control system was proposed and its composition structure and networked architecture were discussed. The two subsystems, the intelligent control system and the remote networked control system, were analyzed in detail with their working principle and functions.(2) Through researches on the key technologies of the control system, the hardware structure of two-stage control system was designed to meet its functional requirements by using the Omron CJ1H series PLC and TPC-1260T industrial computer as the substrate control unit and host computer unit, respectively. Combining with the requirement of intelligent monitoring, the hydraulic press control system software was developed, including condition monitoring, fault diagnosis, maintenance and digital control of process parameters such as blank holder force, punching speed, slider position.(3) By analyzing possible faults in the running of hydraulic press, an intelligent fault diagnosis expert system was designed, based on fault tree (FTA) and rule reasoning.(4) By researches on the networked control system of hydraulic press, the remote fault diagnosis and maintenance system of hydraulic press was developed, with functions of remote monitoring, intelligent fault diagnosis, interactive online diagnosis, equipment maintenance, etc. A networked control system of hydraulic press was realized using Internet/Intranet technology, information technology, artificial intelligence, and automation technology. The whole system had been tested for many times and the result showed that the expected system design goals were achieved.更多还原