城市交通信号模糊控制技术研究及系统设计

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1、中国科学技术大学硕士学位论文城市交通信号模糊控制技术研究及系统设计姓名：万伟申请学位级别：硕士专业：模式识别与智能系统指导教师：陈锋20070501AbstractAlongwiththeeconomicdevelopmentandurbanizationprocess，thecontradictionbetweenroadcapacityanddemandshasbecomeincreasinglyprominent．Underthepresent蛐cconditions．theadvancedtI'R位Csigna

2、lcontroltechnologyisaneffectivewaytoalleviatetrafficjamsandimprovethetramcefficiency．Theadaptiveoptimizationcontroloftrafficsignalisstudiedin-depthinthisdissertationOilthebasisoftheplatformofintelligent仃a赶icsignalcontrolsystemdevelopedbyUS．Themainworkofthisdisse

3、rtafionincludes：1．Anadaptivemulti-phasemethodispresented．Thephaseschemeisdividedintotwomainphasesforanintersection．Themainphasesareexcutedintermofthepredefmedsequence,andthecombinationofsub-phasesfromeachmainphaseisadjustedbyadaptiveprinciple．2．Afuzzylogiccontro

4、ller(FLC)isdesignedtooptimizethetral五csignalforsingleintersection．Withatwo-systemstructure，theFLCoptimizethephase-orderandsignal-timingrespectively．Byanalyzingthefranccharacteristicsofinter．sections，theproperinputparametersofthefuzzycontrollerarechosen．。3．Adistr

5、ibutedcontrolmethodisputforwardt0overcomethelimitationofthecentralcooperativecontr01．Eachintersectioncanon-lineadjustoffsetdynamicly,andsimultaneityadjustthecurrentphaseand也nj【ngsimultaneouslyaccordingtothereal-timeWaffleofdownstreamsections．4．Itisdifficulttomti

6、onalydeterminethemembershipfunctionbymanualway,inaddition,itisnotadapativeforfixedmembershipfunctiontoresponsefortime-varyingtrafficflow．Therefore，GAisintroducedtooptimizethemembershipfunctionsofthefuzzycontrollers．Toavoidtheunreasonableoverlapofthemembershipfun

7、ctionsandnoavailablerulesfor．someuniverse，adynamicself-adaptivepenaltyfunctionhasbeeninvestigated．Inordertoimprovesearchefficiencyandthereliability,amodifiedadaptivecrossoverprobabilityandmutationprobabilityalestudied．Thealgorithmisdescribedindetail．5．Anintellig

8、enttral壬icsi鲫alcontrolsystemisdeveloped．TheregionalmonitoringsystemsoftwareisprogrammedusingVisual(>++．N武．ThesystemisimplementedusingTCP／IP嬲bottomlevelcommunicationpr