简介：Foridentifyingthetire/roadfrictioncoefficientaccuratelyinreal-timetomeettheneedsofautomobileelectroniccontrolsystemandthenimprovingtheactivesafetyperformanceofautomobile,theroadrecognitionmethodbasedonfuzzycontrolalgorithmwasstudiedinthispaper.Adopta7-DOFvehicledynamicmodel,wheelslipratioλandlongitudinalforcesFxastheinputoffuzzycontrollerwithfuzzyruleswasproposed.Theoutputistheweightcoefficientofμ-λfunctionalexpressionwhichisrelatedtoc1,c2andc3proposedbyBurckhardtetc.Byasimulationexperimentofautomobilebrakeontheconditionofdrivingstraightorveeringonasingleroadanddockingpavement,tosomeextent,indicatesthatthismethodisabletoguaranteethereal-timeandaccuracyoftheroadidentification.
简介：Accordingtothetopographyofmountains,thediscretedatapointsfrommapofthewholeregionarefirstsubdividedintosubregionswiththepointstakenfromthefeaturelinesofridge,valleyandscarpbeinginsertedintothemappointset,andusingthefeaturelinesastheboundariesofsubregionstobuildconstrainedDelaunayTIN.Suchanapproachhastheadvantagesofensuringhighaccuracyandfastspeedoflinelayout.
简介：Roadfrictioncoefficientreal-timeestimationmethodsisanimportantissueandprobleminautomotiveactivesafetycontrolsystemdevelopment.Firstafixedfeedbackgainslidingmodeobserverofroadadhesioncoefficientisdesignedthroughtheestablishmentoftire/roaddynamicfrictionmodelinthisarticle.Thesimulationresultsshowsthattheobservercanwellreal-timeidentifythecurrentroadadhesioncharacteristics.Andmoreimportantly,theobserveronlyneedwheelspeedsignalandthebrakingtorque(brakepressure)signal,sothesystemislowcost,anditsadaptabilityisgood.Thereisnodoubtthisestimationmethodhasagoodapplicationprospect.
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