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Predictive-based sliding mode control for mitigating torsional vibration of drill string in the pres

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  • 2020-12-10 16:30:50
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ArticleJournalofVibrationandControl2020,Vol.0(0)1–19©TheAuthor(s)2020Articlereuseguidelines:sagepub.com/journals-permissionsDOI:10.1177/1077546320960995journals.sagepub.com/home/jvcPredictive-basedslidingmodecontrolformitigatingtorsionalvibrationofdrillstringinthepresenceofinputdelayandexternaldisturbanceRoyaSadeghimehr,AmirhosseinNikoofardandAliKhakiSedighAbstractDealingwithtorsionalvibrationsandstick–sliposcillationsofadrillstringsystemisachallengingengineeringtaskintheoildrillingprocessbecauseoftheharmfulandcostlyconsequencesofsuchvibrations.Inthisarticle,thedrillstringsystemismodeledusingalumped-parametermodelwithfourdegreesoffreedom,andthebit–rockcontactisrepresentedbyanonlinearfunctionofabitvelocity.Also,trackingthedesiredvelocityofadrillstringsystemwithknownconstantinputdelayisaddressedinthepresenceofexternaldisturbanceandparameteruncertaintiesbyapplyingtheSmithpredictor–basedslidingmodecontrolmethod.Theperformanceofthesmithpredictor–basedslidingmodecontrolwithinputdelayanddi

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