低温氦透平控制系统的自动化工程

【作者】 夏亮；

【导师】 夏明；

【作者基本信息】 江西理工大学 ， 控制工程， 2013， 硕士

【摘要】 低温技术是一个国家现代化和国民经济建设中不可缺少和不可替代的技术。虽然影响制冷的因素很多，而低温技术的最终目的是迅速达到用户所需要的温度，并长期稳定的运行，保证温度受到干扰的时候能快速响应回到用户所需要的温度。在本系统中冷气供气温度是TI1202，而TI1202的输出受到多变量和多个回路的影响，因此TI1202具有强耦合、时变性、非线性、滞后性等特性，所以很难建立精确的数学模型，而模糊自适应控制是建立在长期经验的基础上，不需要精确的数学模型，根据外界条件的变化自动的，适当的改变控制参数，以满足用户的需求。本文以低温氦透平自动控制系统的项目为背景，主要从以下几个方面研究：(1)根据国内外的低温氦透平制冷机研制的相关资料。和以前的工艺相比，这次工艺对重要回路加入模糊自适应控制，在控制方面，向智能化转变，对流程控制的要求更加高。(2)在上位机中绘制静态工艺流程图和流程控制框图。根据控制逻辑的要求，进一步完善项目的具体方案。出总体结构框图，包括监控站和操作站两个部分。监控站是工控机，通过组态软件设计界面，与操作站通讯。操作站采用西门子S7-300，通过PROFIBUS-DP和ModBus与上位机通讯。(3)采用WINCC V6.2监控组态软件，对流量、温度、压力、气体纯度等进行实时监控。更多还原

【Abstract】 Low temperature technology isindispensable and irreplaceable innational modernization andnational economic construction.Although there are many factors which influencerefrigeration.The final purpose of low-temperature technology is to reach the needed temperaturerapidly,and keep long-term stable operation. Once the temperature is affected,it can keep thetemperature back fast.TI1202is the eventuallytemperature for users in this system.However, thecharacteristics of TI1202is strong coupling，nonlinear and non-stationary hysteresis Influencedby multivariate and multiple loop,it is very difficult. To establish a precise mathematic model.The fuzzy adaptive control is built on the basis of long-term experience，which there is no need ofaccurate mathematical model.According to the change of external conditions，it can changecontrol parametersautomatic and appropriatein order to meet the needs of users.Low temperaturehelium turbine automation control system project is considered as the background of establishingan accurate mathematical model. The research aspects are as follows:First, According to the low temperature helium turbine refrigerator development of relevantmaterial at home and abroad.compared with the process before，this process join the fuzzyadaptive control.In the aspect，it has intelligent transformation，which has higher requirements inthe process control.Second, Draw static process flowsheet and process control block diagram in the uppermachine. Improve the concrete scheme of project according to the requirements of the logic ofthe control. The overall structure diagram,including monitor and operation,Monitor is ipc,through the configuration software design interface,and operation station communication. Theoperating station of Siemens S7-300,through the Profibus-DP and ModBus and epistatic machinecommunication.Third, Used WINCC V6.2monitoring configuration software，the flow rate,temperature,pressure,gas purity of real-time monitoring.更多还原