delta并联机构运动学分析及轨迹规划(5)

2020-12-24 16:38

Abstract

Title:KINEMEATICSRESEARCHANDPATHPLANINGOFDELTA

PARALLELMANIPULATOR

Major=Mechanicaldesignandtheory

Name=DengMengSignature.且糊

Supervisor=AssociateProfessorWangJingpingsIgnature:显心哟防

Abstract

Inthefood、packagingandotherindustries,themanipulatorareusuallyrequiredtoachievethepickandplaceoperationssuchaspackaging、sorting、encapsulationandSOonwithhigh.speed,accuracyandsmooth.ParallelmechanismhasvastapplicationprospectsInthehigh-speedlightmanipulatorbecauseofthecharacteristicofhighrigidity,superiorcarryingcapacity,highaccuracyandsmallself-weightloadratioetc.

ThisthesistakestheDeltaparallelmechanism弱theresearchobject,firstly,mechanismWassimplifiedaccordingtoitsstructuralfeatures,constraintequationsoftheDeltaparalleln伦c】【12幽【ismwasestablished,theinverseanalyticsolutionofthepositionandtheforwardnumericalsolutionofthepositionwereobtained.BaseOllthat,velocity、accelerationofmemechaIlismwasanalyzed,theJacobianmatrixWasdeduced.Secondly,thesystemdynamicsmodelwasestablishedbyusingtheLagrangeequations,inordertorealizethecomputationaldccoupling,thesysteminertiamatrixWascalculatedindividuallybyapplicationofkineticenergytheorembeforemodeling.

ThekinematicalperformanceoftheDeltaparallelmechanismWasanalyzedinthethesis,theanalyticalexpressionsoftheDeltaparallelmechanismsingle--open-chainsub‘ spaceboundarysurfaceandtheworkspaceoftheDeltaparallelmechanismwereobtainedbasedoncurveenvelopetheory.Bygiventhestructuralparameters,operabilityandJacobianmatrix’sconditionIl_哪nberintheX-Ysectiondistributionchartsweresimulated,thesimulatedresultssll0WthatthemotiontransmissionperformanceiSgood.

.Finally,withthegoalofshortestworkcycleandstability,thesinemotionlaw、5-polynomialandmodifiedtrapezoidalmotiontrajectoryfunctionbythestraightlineandare缸ansitiontrajectorymodelswereappliedtotrajectoryplanningfortheDeltaparallelmaIlipulator.Theconclusionswereobtainedthatthemodifiedtrapezoidalmotiontrajectoryhasshortercycleandhigherefficiencythantheothertwomotions,thesimulatedcurvesofarc


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