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本科学生毕业设计基于PAC的液位控制实验系统设计院系名称：电子工程系专业班级：自动化07-1班学生姓名：庞海峰指导教师：邵国平职称：讲师黑龙江工程学院二○一一年六月TheGraduationDesignforBachelor'sDegreeDesignoftheLiquidLevelControlExperimentSystemBasedOnPACCandidate：PangHaifengSpecialty：AutomationClass：07-1Supervisor：LecturerShaoGuopingHeilongjiangInstituteofTechnology2011-06·Harbin黑龙江工程学院本科生毕业设计（论文）I摘要伴随时代发展，进入21实际崭新工业控制领域，PACSystems引导着自动化行业的发展，并且PAC处于工业自动化控制领域主战场，为各种各样的自动化设备提供了可靠的控制应用，随着电子事业的飞速发展，PAC已经可以在各个领域去适应不同客户的要求。本次毕业设计的课题是基于PAC的液位控制系统的设计。在设计中，主要包括了数学模型的建立和控制算法以及硬件的设计。整个控制系统由PACRX3i和SCADA构成，控制策略采用PID控制，在设计中编写了PID程序，完成了单容、双容、串级等液位控制系统的恒值控制，编写了SCADA，设计了主画面、单容液位控制组态画面、双容液位控制组态画面和串级控制组态画面，通过IFIX将PID参数和运行指令写入PACRX3i中，完成水箱的液位控制。关键词：GERX3i；单容；双容；串级；PID控制算法；参数整定；IFIX黑龙江工程学院本科生毕业设计（论文）IIABSTRACTWiththedevelopmentofthecomputer,PACSystemsautomationisabletoguidethedebelopmentoftheindustry.AndthePACisalwaysinthefieldofindustryialautomation,itcontrolsthemainbattlefieldforawiderangeofautomationequipmenttoprovideaveryreliablecontrolapplications.Withtherapiddevelopmentofelectronicbusiness,PAChasbeenabletoadaptinvariousoffieldsanddifferentcustomerrequirements.ThesubjectofgraduationdesignisbasedonPAC,liquidlevelcontrolsystemdesign.Inthedesign,itmainlyincludesestablishingmathematicsmodelandcontrolalgorithmandhardwaredesign.ThewholecontrolsystemisconsistedofPACRX3iandSCADA,andthecontrolstrategyadoptsPIDcontrol,inthedesign,thePIDprogramcodewaswritten,andcompletedthelevelconstantvaluecontrolofthesinglecontainer,doublecontainers,ascadecontrolsystem.TheSCADAprogramwaswritten,thendesignthelordpicture,singlecontainerlevelcontrolconfigurationscreen,doublecontainersliquidlevelcontrolconfigurationscreenandcascadecontrolconfigurationscreen,byIFIXwritesthePIDparametersandtheoperatinginstructionsintothePACRX3i,andfinallycompletethelevelcontroltank.Keywords:GERX3i；SingleContainer；DoubleContainers；Cascade；PIDControlAlgorithm；ParametersSetting；IFIX黑龙江工程学院本科生毕业设计（论文）目录摘要······································································································IAbstract·································································································II第1章引言·························································································11.1概述····························································································11.1.1研究背景···············································································11.1.2发展现状···············································································11.2课题意义······················································································21.3主要内容······················································································3第2章液位控制系统设计方案分析······················································42.1整体方案······················································································42.1.1方案简介···············································································42.1.2系统组成···············································································42.2过程控制实验模型··········································································42.3控制要求······················································································52.3.1控制要求···············································································52.3.2技术路线···············································································52.4本章小结······················································································6第3章过程控制模型电气系统设计······················································73.1GEPAC简介·················································································73.2PACSystemsRX3i控制器·································································73.2.1RX3i特性··············································································83.2.2ProficyTMMachineEdition························································83.3PACSystemsRX3i模块配置选型························································83.3.1CPU····················································································83.3.2电源模块···············································································83.3.3以太网通信模块······································································93.3.4数字量输入模块······································································93.3.5数字量输出模块·····································································103.3.6高速计数器模块·····································································10黑龙江工程学院本科生毕业设计（论文）3.3.7模拟量输入模块·····································································103.3.8模拟量输出模块·····································································113.4输入设备选型···············································································113.4.1液位变送器···········································································113.5输出设备选型···············································································123.5.1固态继电器·································································