学科分类
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5 个结果
  • 简介:Ananalyticalstudyofthetwodegreesoffreedomnonlineardynamicalsystemispresented.Theinternalmotionofthesystemisseparatedanddescribedbyonefourthorderdifferentialequation.AnapproximateapproachallowsreducingtheproblemtotheDuffingequationwithadequateinitialconditions.Anovelideaforaneffectivestudyofnonlineardynamicalsystemsconsistinginaconceptofthesocalledlimitingphasetrajectoriesisapplied.Bothqualitativeandquantitativecomplexanalyseshavebeenperformed.Importantnonlineardynamicaltransitiontypephenomenaaredetectedanddiscussed.Inparticular,nonsteadyforcedsystemvibrationsareinvestigatedanalytically.

  • 标签: 内部运动 非线性动力学系统 非线性动力系统 振荡器 主共振 DUFFING方程
  • 简介:这份报纸为一组僵硬身体学习协调运动产生的问题。协调运动原语,相对equilibria和演习的二个班,当为产生的积木协调了运动,被给。在运动原语计划框架基于,一个控制方法面对不安为一个协调运动计划的柔韧的执行被建议。控制方法把相对equilibria稳定与演习设计相结合,并且导致计划框架的一个靠近环的运动。控制方法的表演通过数字模拟被说明了。

  • 标签: 协调控制 协调运动 多刚体 基元 运动规划 运动计划
  • 简介:ThispaperpresentsacanonicalHamiltonianmodelofliquidsloshingforthecontainercoupledwithspacecraft.Ellipticalshapeofrigidbodyisconsideredasspacecraftstructure.Hamiltoniansystemisanimportantformofmechanicalsystem.Itmostlyusedtostabilizethepotentialshapingofdynamicalsystem.Freesurfacemovementofliquidinsidethecontaineriscalledsloshing.Ifthereisuncontrolledresonancebetweenthemotionoftankandliquid-frequencyinsidethetankthensuchsloshingcanbeareasonofattitudedisturbanceorstructuraldamageofspacecraft.Equivalentmechanicalmodelofsimplependulumormassattachedwithspringforsloshingisusedbymanyresearchers.MassattachedwithspringisusedasanequivalentmodelofsloshingtoderivethemathematicalequationsintermsofHamiltonianmodel.AnalyticalmethodofLyapunovfunctionwithCasimirenergyfunctionisusedtofindthestabilityforspacecraftdynamics.Verticalaxialrotationistakenasthemajoraxialsteadyrotationforthemovingrigidbody.

  • 标签: 运动稳定性 航天器结构 航天器动力学 液体晃动 容器 LYAPUNOV