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简介：为用仅仅一个推进器的一只underactuated太空船，关于轨道框架的态度可控制性面对期刊摆动骚乱被学习，它在为underactuated态度控制系统设计控制法律上提供一个preconditional指南。第一，态度动态模型为一只underactuated太空船被建立，并且态度运动用特殊的直角的组被描述(那么(3))。第二，Liouville定理被用来证实underactuated态度控制系统的飘移向量产生的流动是保存卷的。而且，根据Poincar?觥馽軥鮊鋥?菩蒚鳦?髧??蒚迥?髧???髧?????蒚裥邞雦閳軦？？

简介：我们建议复杂性的一个新定义。定义看那一个系统什么时候经由一个短暂状态演变到一个最后的状态，它的复杂性两个都取决于许多最后的州、短暂的状态。许多短暂状态可以被对骚乱的反应的差异描述。我们希望这个定义能由证明所有简单系统有零复杂性描述在简单系统和复杂系统之间的一条清楚的边界，并且所有复杂系统有积极复杂性。复杂性计算的一些例子被举，它支持我们的希望。

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简介：Anadaptiveactuatorfailurecompensationschemeisproposedforattitudetrackingcontrolofspacecraftwithunknowndisturbancesanduncertainactuatorfailures.Anewfeatureofthisadaptivecontrolschemeistheadaptationofthefailurepatternparameterestimates,aswellasthefailuresignalparameterestimates,fordirectadaptiveactuatorfailurecompensation.Basedonanadaptivebacksteppingcontroldesign,theestimatesofthedisturbanceparametersareusedtosolvethedisturbancerejectionproblem.Theunknowndisturbancesarecompensatedcompletelywiththestabilityofthewholeclosed-loopsystem.Theschemeisnotonlyabletoaccommodateuncertainactuatorfailures,butalsorobustagainstunknownexternaldisturbances.Simulationresultsverifythedesiredadaptiveactuatorfailurecompensationperformance.

简介：Thisarticleisconcernedwiththegrowthofenergyofdisturbancesinabaroclinicflowwithinafinitetimeperiod.Theimplicitdifferenceschemewasappliedtothelinearizedvorticityequation,andthedisturbanceenergywascomputedforthreekindsofverticalshears.Itturnsoutthatallthedisturbanceenergyrapidlyincreasesinitially,andduringthesucceedingperiodthereareseveralstagesofgrowthanddecayofenergyofdisturbances,andfromacertaintimeon,allthedisturbanceenergybeginstodecrease.

简介：ForaclassofSISOnonlinearcontrolsystemswithparameteruncertaintyanalmostdisturbancedecouplingproblemwithstabilityisdefinedandinvestigated.Backsteppingtechniqueprovidesapractcaldesignmethodofcontroller,underwhichtheL2gainfromthedisturbancetothecontrolledoutputcanbearbitrarilysmallsubjecttononlinearuncertaintiesandtheclose-loopsystemisinternallyasymptoticallystable.

简介：Uptonow,sometechnologyofneuralnetworksaredevelopedtosolvethenon-linearityofresearchedobjectsandtoimplementtheadaptivecontrolinmanyengineeringfields,andsomegoodresultswereachieved.Thoughitputssomequestionsovertodesignapplicationstructurewithneuralnetworks,itisreallyunknowableaboutthestudymechanismofthose.But,theimportanceofstudyratioiswidelyrealizedbymanyscientistsnow,andsomemethodsonthemodificationofthatareprovided.

简介：这篇论文为描述符系统与最糟骚乱的拒绝处理单个线性二次的性能的问题。在我们给的条件下面，theworst骚乱和最佳的控制状态对分别地是唯一的，因为州的反馈和靠近环的系统常规、稳定、没有推动，最佳的控制能被综合。

简介：不明确的磨擦是在计算机数值控制机器影响伺服系统的精确性的一个关键因素。在这份报纸，基于活跃骚乱拒绝控制(ADRC)的原则，一个控制方法被建议，在扩大州的观察员(ESO)和扩大的减少的顺序声明观察员(RESO)被用来估计并且补偿骚乱的地方。作者证明两条途径在理论保证高精确性，并且为参数选择给标准。作者也证明有RESO的ADRC在骚乱评价和追踪的错误两个都与ESO比那更好表现。计算机数值控制上的模拟结果用机器制造我们的控制的有效性和可行性接近的表演。

简介：Inthethree-phasetrafficflowstudies,thetrafficflowcharacteristicatthebottlenecksectionisahotspotintheacademicfield.Thecontroversyaboutthecharacteristicsofthesynchronizedflowatbottleneckisalsothemaincontradictionbetweenthethree-phasetrafficflowtheoryandthetraditionaltrafficflowtheory.Undertheframeworkofthree-phasetrafficflowtheory,thispapertakestheon-rampasanexampletodiscussthetrafficflowcharacteristicsatthebottlenecksection.Inparticular,thispapermainlyconductsthemicro-analysistotheeffectoflanechangeunderthetwolaneconditions,aswellastheeffectoftheon-ramponthemainlinetrafficflow.Itisfoundthatwhenthemainroadflowislow,thegreatertheon-rampinflowrate,thehighertheaveragespeedofthewholeroadsection.Astheprobabilityofvehiclesenteringfromtheon-rampincreases,theflowandtheaveragespeedofthemainroadaregraduallystabilized,andthentheon-rampinflowvehiclesnolongerhaveasignificantimpactonthetrafficflow.Inaddition,thispaperfocusesonthevelocitydisturbancegeneratedattheon-ramp,andproposesthecorrespondingon-rampcontrolstrategybasedonit,andthesimulationverifiedthatthecontrolstrategycanreasonablycontrolthetrafficflowbytheon-ramp,whichcanmeetthecontrolstrategyrequirementstosomeextent.

简介：Therobustboundedflightcontrolschemeisdevelopedfortheuncertainlongitudinalflightdynamicsofthefighterwithcontrolinputsaturationinvokingthebacksteppingtechnique.Toenhancethedisturbancerejectionabilityoftherobustflightcontrolforfighters,theslidingmodedisturbanceobserverisdesignedtoestimatethecompoundeddisturbanceincludingtheunknownexternaldisturbanceandtheeffectofthecontrolinputsaturation.Basedonthebacksteppingtechniqueandthecompoundeddisturbanceestimatedoutput,therobustboundedflightcontrolschemeisproposedforthefighterwiththeunknownexternaldisturbanceandthecontrolinputsaturation.Theclosed-loopsystemstabilityunderthedevelopedrobustboundedflightcontrolschemeisrigorouslyprovedusingtheLyapunovmethodandtheuniformlyasymptoticalconvergencesofallclosed-loopsignalsareguaranteed.Finally,simulationresultsarepresentedtoshowtheeffectivenessoftheproposedrobustboundedflightcontrolschemefortheuncertainlongitudinalflightdynamicsofthefighter.

简介：ThispaperisconcernedwiththeclocksynchronizationproblemforIEEE1588networks.First,thesynchronizationerrorisdescribedasaboundeddisturbance,andalinearextendedstateobserver(LESO)isdesignedtoestimatethelumpeddisturbanceinducedbytheoscillatorfrequencydriftandtimestampsquantizationerrors.Then,thelumpeddisturbanceiscompensatedbytheproposedcontroller.Theproposedapproachhastheadvantagethatit'sabletodealwithnon-Gaussiandisturbanceinducedbyaccumulatedquantizationerrors.SimulationsareDrovidedtovalidatetheeffectivenessandsuperiorityoftheproposedapproach.

简介：在这篇论文，稳定性和骚乱变细在效果被考虑的不明确的存取延期和包退学学生下面为联网的控制系统(NCS)的一个类发出。我们的目的是在延期和包退学学生率，系统稳定性和H_∞骚乱变细性质在下面被保存到需要的水平上发现条件。在这篇论文的Thebasic想法是提出象一个分离时间的交换系统的如此的联网的控制系统。然后NCS“稳定性和表演问题能为交换系统被归结为相应问题，它被学习十年了并且为很多结果在文学为哪个是可得到的。在这篇论文的技术在thediscrete时间基于最近的进步交换系统和片明智的Lyapunov函数。

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简介：Reactioncontrolsystem(RCS)isapowerfulandefficientactuatorforspacevehiclesattitudecontrol,whichistypicallycharacterizedasapulsedunilateraleffectoronlywithtwostates(off/on).Alongwithinevitableinternaluncertaintiesandexternaldisturbancesinpractice,thisinherentnonlinearcharacteralwayshindersspacevehiclesautopilotfrompursuingprecisetrackingperformance.Comparedtomostofpre-existingmethodologiesthatpassivelysuppresstheuncertaintiesanddisturbances,adesignbasedonpredictivefunctionalcontrol(PFC)andgeneralizedextendedstateobserver(GESO)isfirstlyproposedforthree-axisRCScontrolsystemtoactivelyrejectthatwithnorequirementforadditionalfuelconsumption.ToobtainahighfidelitypredictivemodelonwhichtheperformanceofPFCgreatlydepends,thenonlinearcouplingmultiple-inputmultiple-output(MIMO)flightdynamicsmodelisparameterizedasastate-dependentcoefficientform.Andbasedonthat,aMIMOPFCalgorithminstatespacedomainforaplantofarbitraryordersisdeducedinthispaper.Theinternaluncertaintiesandexternaldisturbancesarelumpedasatotaldisturbance,whichisestimatedandcancelledtimelytofurtherenhancetherobustness.Thecontinuouscontrolcommandsynthesisedbyabovecontroller-rejectortandemisfinallymodulatedbypulsewidthpulsefrequencymodulator(PWPF)toon-offsignalstomeetRCSrequirement.Therobustnessandfeasibilityoftheproposeddesignarevalidatedbyaseriesofperformancecomparisonsimulationswithsomeprominentmethodsinthepresenceofsignificantperturbationsanddisturbances,aswellasmeasurementnoise.

简介：基于线虫生活策略，成熟索引(MI)在1990被建议了估计可能的变化陆上并且淡水线虫集合由人为的活动导致了。它随后也被用于海洋的生态系统并且比较地还没很流行，在与大量人为的司机的关系估计生态的质量提供一个好方法。然而，很少数据在它对物理应力的反应上是可得到的，特别在沿海的区域的一个关键因素。在这研究，从在马尔代夫执行的二学习格的海洋的线虫类被用来测试MI和生活策略特点(即，c-p班)为检测物理骚乱的效果。结果证实线虫很好被使适应显示出恢复的一般的高率的物理应力。可伸缩的C-p和MI不似乎为因为几个类，和对各种各样的骚乱类型的可能的微分回答的生活策略上没有实验证据，可能揭示这种骚乱类型适当可以被假设。

简介：WeanalyzetherandomdisturbanceinthetransmissionoflightthroughaspinningGlan-Thompsontypeprismpolarizer.ThedisturbancemakesthedependenceofthetransmissionontherotationanglesignificantlydeviatesfromtheMaluscosine-squaredlawandseverelyspoilstheoutputlightquality.Slightvibrationofthepolarizerasitrotatescombingthemulti-beam-interferenceeffectraisesthedisturbance.Furtheranalysisrevealsthesensitivedependenceofthedisturbanceonthecomposingmaterialoftheprismgap,andtheappropriateselectionofsuchmaterialcanmakethedisturbanceminimizetoverydesirablelevels.Themodelresultsshowquitegoodagreementwithexperiments.