简介:AccordingtoaclassofnonlinearSISOdiscretesystems,thefuzzyslidingmodecontrolproblemisconsidered.BasedonTakagi-Sugenofuzzymodelmethod,afuzzymodelisdesignedtodescribethelocaldynamicperformanceofthegivennonlinearsystems.Byusingtheslidingmodecontrolapproach,theglobalcontrollerisconstructedbyintegratingallthelocalstatecontrollersandtheglobalsupervisoryslidingmodecontroller.Thetrackingproblemcanbeeasilydealtwithbytakingadvantageofthecombinedcontroller,andtherobustnessperformanceisimprovedfinally.Asimulationexampleisgiventoshowtheeffectivenessandfeasibilityofthemethodproposed.
简介:Inthispaper,anoptimalhigherorderlearningadaptivecontrolapproachisdevelopedforaclassofSISOnonlinearsystems.Thisdesignismodel-freeanddependsdirectlyonpseudo-partial-derivativesderivedon-linefromtheinputandoutputinformationofthesystem.Anovelweightedone-step-aheadcontrolcriterionfunctionisproposedforthecontrollaw.Theconvergenceanalysisshowsthattheproposedcontrollawcanguaranteetheconvergenceundertheassumptionthatthedesiredoutputisasetpoint.Simulationexamplesareprovidedfornonlinearsystemstoillustratethebetterperformanceofthehigherorderlearningadaptivecontrol.
简介:摘要:计算教学是小学数学教学的重要内容,是数学学习的基础,计算能力是小学生在学习数学知识时必须要具备的专业能力之一,它直接影响小学生的数学成绩以及数学素养的成长。为了增强小学生的数学计算能力,教师应站在大单元整体教学的角度贯穿理通计算的算理,让学生在计算时步步有理有据,明明白白,减少算法的错误,从而从根本上提高计算能力。
简介:摘要:新形势下,数学教师在教学过程中,应当打破传统以教师为主体的教学弊端,更加重视学生主体积极主动作用,培养学生的学习能力和数学思维,单元整合教学模式,充分结合了教材知识和学生主体的实际情况,制定教学内容,培养学生的学习兴趣,提高数学计算能力,从而提高教学质量。