摘要循环流化床锅炉具有燃料适应性广、截面热强度高、污染物排放少、锅炉负荷适应性高、燃料制备系统相对简单等优点。正是由于循环流化床锅炉具有如此多的优点，从而加快了循环流化床锅炉的商业化发展。但是循环流化床锅炉是一个分布参数、非线性、时变、大迟延、多变量耦合紧密的控制对象，这也就给循环流化床锅炉的运行控制提出了更高的要求。本文首先从循环流化床原理入手，简要说明了循环流化床锅炉的结构和优点，并且分析了锅炉的控制模型。针对锅炉床温控制难题，设计了基于模糊逻辑的循环流化床模糊解耦控制器，说明了控制器的优缺点，并进行仿真对比。从仿真结果来看，控制器达到了比较令人满意的效果，控制器在稳定性、适应性、鲁棒性等控制特性上比常规PID控制要好。关键词：锅炉炉膛负压；PID控制；模糊PID控制；仿真DESIGNOF500t/hCFBBOILERBEDTEMPERATUREFUZZYPIDCONTROLSYSTEMABSTRACTCirculatingFluidizedBedBoiler(CFBBorCFBBoiler)havefueladaptability,Thewarmheartedintensityofsectionishigh,Thecontaminantplacesinproperorderamoment.Boilerburdenadaptabilityisgood.Thefuelispreparedthesystemdistinguishingfeaturesuchaseasyrelativelyandsoon.Asweknow,CFBBisacontrolobjectthatpointsofdistributingparameterandnonlinearandtimevariableandstrongdelayandcouplingtightlymultivariable,SothehigherdemandCFBBautomationisproposed．HerebyintroducingthetheoryofCFBB,brieflyillustratesthestructureandadvantagesofCFBB,meantimeanalysesthecontrolmodelofCFBB．FocusingoncomplexdynamiccharacteristicinvolvedincombustionprocessofCFBB,proposesfuzzylogicbasedCFBfuzzydecouplecontroller.Thestatementsofthecontroller'sadvantageanddisadvantagearemade.Thesimulationisproceeded.TheresultshowsthatsyntheticallyfuzzycontrollercanprovideUSabettercontrolquality,robust,speedinessthanthegeneralPIDcontrolsystem．Keywords：boilerfurnacepressure；pidcontrol；fuzzypidcontrol；simulation目录TOC\o"1-3"\h\uHYPERLINK\l"_Toc1012"1绪论PAGEREF_Toc10121HYPERLINK\l"_Toc13325"1.1课题研究的背景和意义PAGEREF_Toc133251HYPERLINK\l"_Toc22645"1.2循环流化床燃烧控制的特点PAGEREF_Toc226452HYPERLINK\l"_Toc8731"1.3本课题设计的目的PAGEREF_Toc87313HYPERLINK\l"_Toc25021"1.4本课题设计的重点与难点PAGEREF_Toc250213HYPERLINK\l"_Toc18825"1.4.1重点PAGEREF_Toc188253HYPERLINK\l"_Toc26812"难点PAGEREF_Toc268124HYPERLINK\l"_Toc26444"1.5本文内容安排PAGEREF_Toc264444HYPERLINK\l"_Toc30542"2循环流化床锅炉原理PAGEREF_Toc305425HYPERLINK\l"_Toc932"2.1循环流化床工作原理PAGEREF_Toc9325HYPERLINK\l"_Toc19260"2.2床温控制模型床温被控对象动态特性PAGEREF_Toc1926