【作者】 王珊珊；

【导师】 郭奇；

【作者基本信息】 燕山大学 ， 化工过程机械， 2011， 硕士

【摘要】 大滞后是工业生产过程中的一种常见而又较难控制的对象特性。为克服滞后的影响，本文将模糊控制与改进的Smith预估方法相结合，用新设计的控制器来代替传统的调节器，以AE2000过程控制装置为对象，建立了仿真数学模型，从仿真到试验进行了全面的研究。在Matlab仿真软件中建立常规PID控制，Smith控制，IMC-Smith控制以及改进的模糊Smith控制的仿真模型，计算并调整控制器中对控制性能有影响的各个参数，在模型匹配与失配以及有无干扰的情况下将几种控制器的控制效果与改进的模糊Smith控制效果进行比较和调整。在浙江中控公司研发的JX-300XP装置的DCS平台上进行二次开发，完成系统I/O组态、自定义控制方案组态、流程图绘制、报表组态等，采用SCX语言对改进的模糊Smith控制算法的编程设计，进行相关的控制试验并调试，在实际运行中解决了常规控制中存在的若干问题。试验结果表明，无论在Matlab仿真环境中还是在DCS实际应用中，改进的模糊Smith控制都具有良好的动静态特性及较高的鲁棒性和抗扰性。本文工作改变了AE2000过程控制装置仅限于常规PID控制的状态，扩展了JX-300XP系统的功能，仿真与试验研究均收到了良好的效果。更多还原

【Abstract】 Time-delay is an object property that is familiar and difficult to control in industrialproduction process. In order to overcome the delay’s effect , using internal model Smithpredictor combined with the fuzzy control method in this paper, the new controllerreplaces the traditional PID controller. We design the program of the improved fuzzySmith control method using SCX language, and experiment in the DCS control system.We create PID control, Smith control, IMC-Smith control and the improved fuzzySmith control simulation models in Matlab, and continuously adjust the controlparameters that affect control performance, and compare the effect when the model ismatching and mismatching.We make the JX-300XP DCS produced by Zhejiang SUPON Electronic TechnologyCo. as platform for secondary development, complete the system I/O configuration, thedefinition of control scheme configuration, the report configuration, and draw theflowchart, etc.,We design the program of the improved fuzzy Smith control method usingSCX language, experiment and debug in DCS. Solve several issues that exist in PIDcontrol in actual operation.Experiment results show that both in the Matlab simulation or in the practicalapplication of DCS, the new controller has better dynamic and static characteristics,robustness and interference rejection on large time delay system. This work has once againchanged the AE2000 process device which is limited to conventional PID control of thestate, and extends the JX-300XP system functions. The simulation and experimentalstudies have obtained good results.更多还原