简介：Animprovedconstrained(IC)steeringlawforsinglegimbalcontrolmomentgyros(SGCMGs)withdeformedpyramidconfiguration(DPC)isproposed.Firstofall,theoriginalsystemwithfivepyramidconfiguration(FPC)whosetwoadjacentgyrosareinfailurestateisreconfiguredasadegradedsystemwithDPC.Then,thesingularangularmomentumhypersurfacesoftheoriginalandthedegradedsystemsareplottedviathesingularangularmomentumequationofSGCMGs.Basedonsingularsurfaces,thedifferencesbetweenFPCandDPCinsingularityandmomentumenvelopeareobtaineddirectly,whichprovideanimportantreferenceforsteeringlawdesignofDPC.Finally,anICsteeringlawisdesignedandappliedtoDPC.ThesimulationresultsdemonstratethattheICsteeringlawhasadvantagesinsimplicityofcalculation,avoidanceofsingularityandexactnessofoutputtorque,whichendowthedegradedsystemwithfinecontrollabilityinarestrictedworkspace.

简介：研究被做克服在一条航道与一艘轮船的自动驾驶系统联系的传统的问题。一艘轮船有波浪骚乱的动态模型被造；一个波浪过滤器借助于一个扩大状态观察员(ESO)被设计。模型从有颜色的噪音贿赂的出发大小估计了低频率运动部件，因此前后的驾驶由高频率波浪骚乱引起了被避免。同时，一个柔韧的自动驾驶仪系统，由可变结构控制理论设计了，被介绍。在波浪过滤器工作很好的危险的海地位表演完成的模拟结果；自动驾驶仪有强壮的坚韧性到环境骚乱；模型不安，；更重要地，rudder调整的频率显著地被减少。

简介：Thetraditionalone-dimensionalultrasonicbeamsteeringhastimedelayandisthusacomplicatedproblem.AnumericalmodelofultrasonicbeamsteeringusingNeumannboundaryconditioninmultiplysicsispresentedinthepresentpaper.Thismodelisbasedonthediscretewavenumbermethodthathasbeenprovedtheoreticallytosatisfythecontinuousconditions.Thepropagatingangleofnovelmodelisafunctionofthedistanceinsteadofthetimedomain.Thepropagatingwavefrontsatdesiredanglesaresimulatedwiththesinglelinesourcesforplanewave.Theresultindicatesthatanybeamanglecanbesteeredbydiscretelineelementsresourceswithoutanytimedelay.

简介：AdualSshapedmicrostripantennawitharealisticfeedisproposedforgenerationoftiltedbeamradiationpatternpertainingforbeamsteeringapplications.Toachievethis,fourfeedingpointsarelocatedatadistanceof5.6mmfromtheantennacentre.Thesefeedingpointswhenexcitedonebyonegeneratefourtiltedbeamsinfourdifferentspacequadrants,thusyieldingabeamsteerableantenna.Importantly,sincetheproposedantennaissymmetricalinthestructure,allthefourtiltedbeamshavethesameradiationpatterncharacteristics.Afurtherenhancementoftheantennabandwidthisalsoachievedusing100-μmcapacitivecouplingbetweenthefeedandtheantennastrip.

简介：Fromtheviewpointsofenvironmentalprotection,supportfortheagedandensuringtherighttomobility,thereisaneedtodevelopanewtypeofmobilityvehiclethatprovidesmoreeffectivetransportation.Theauthorsproposeaninvertedpendulumvehiclewithpedalsasoneoftheformsofpersonalmobilityvehicles(PMVs).Inthispaper,thesteeringperformanceoftheinvertedpendulumvehiclewithpedalsisdiscussedbasedonexperimentsonaprototype.Fromtheexperimentalresults,itwasconfirmedthattheerrorsfromthefivesubjectsforthetargettrajectoryandthefive-gradeevaluationofthemaneuverabilityweresimilar.Finally,wecreatedaninvertedpendulumvehiclewithpedalstowhichwasaddedareactionactuatorforthesteeringsystem.Fromtheexperimentalresults,itwasfoundthatsettingappropriatefeedbackgainsforthehandlesteeringangleanditsrateofrotation,whichcontroltherightandleftwheeldrivingtorques,resultedingreatlyimprovedmaneuverability.

简介：热带气旋是在更温暖的热带海洋发生并且在它的中心附近很快旋转并且同时沿着包围流动移动的一种强烈天气系统。大规模发行量在决定热带气旋的运动和驾驶流动的效果是在预报热带气旋运动和轨道的最高的优先级起一个主要作用，这通常被认出。这篇文章采用一个新方法导出驾驶流动并且选择一个典型转弯轨道盒子(台风丹，编码了9914)说明方法的有效性。一般途径是修改涡度，geostropical涡度和分叉，分别地，在非分叉的流函数，geoptential和速度潜力调查变化并且计算修改速度域决定驾驶流动。不同于在象风地或geopoential高度的加权的一般水准那样的常规使用的另外的方法，这个方法在环境地上有最不不利的效果并且能导出与暴风雨运动适合很好的合适的驾驶流动。与另外的内部、外部的forcings结合了，这个方法能在热带气旋轨道的预言有宽申请。

简介：Anoveldesignofatwo-axisfaststeeringmirror(FSM)withpiezoelectricactuatorsisproposedforincoherentlaserbeamcombination.ThemechanicalperformanceoftheFSMistested.Theresultsshowthatthetiltingrangeofthemirrorisabout4mrad,andthe1st-orderresonancefrequencyisabout250Hz.Aself-designedgratingencoderistakenasthesensor,whichensurestheoptimalprecisionof10μrad.Thenovelmechanicaldesigncanmeettherequirementofengineeringinincoherentlaserbeamcombination.

简介：Thispaperpresentsacollaborativebeamforming(CB)techniquetoorganizethesensornode'slocationinalineararrayforgreenwirelesssensornetwork(WSN)applications.Inthismethod,onlyselectedclustersandactiveCBnodesareneededeachtimetoperformCBinWSNs.Theproposedleast-squarelineararray(LSLA)managestoselectnodestoperformasalinearantennaarray(LAA),whichissimilartoandasoutstandingastheconventionaluniformlineararray(ULA).TheLSLAtechniqueisalsoabletosolvepositioningerrorproblemsthatexistintherandomnodesdeployment.Thebeampatternfluctuationshavebeenanalyzedduetotherandompositionsofsensornodes.Performancesintermsofnormalizedpowergainsaregiven.ItisdemonstratedbyasimulationthattheproposedtechniquegivessimilarperformancestotheconventionalULAandatthesametimeexhibitslowercomplexity.