自动控制基础知到智慧树期末考试答案题库2025年同济大学.docx

自动控制基础知到智慧树期末考试答案题库2025年同济大学

WhichofthefollowingstatementsisNOT对?（）

答案:Whendealingwithtransferfunctions,theinitialconditionsareassumedtobenonzero.

Whichisthereasonthatthephase-lagcompensatorscanbeusedtoincreasethephasemarginofsomesystems?（）

答案:thelagphase-angleofthecompensators

Whenwesketchtherootlocus,theangleconditionsatisfiedbyaminimum-phasesystemisthesameasthatbyanon-minimumsystem.（）

答案:错

Whenwedeterminethestabilityofasystemwiththefollowingmethods,whichonesareequivalent?（）

答案:Routh-Hurwitzcriterion；Theclosed-looppoles

WhenusingtheRouthcriterion,anall-zerorowintheRoutharraymeansthesystemis（）atbest.

答案:criticallystable

Whentherootlocusofa2ndordersystemisgiven,wecanget（）fromit.

答案:Percentovershoot；Stability；Settingtime

Whendebuggingtheclosed-loopsystem,theopen-loopgainofthesystemwasgraduallyincreased.Itwasfoundthatthecontrolprecisionofthesystemwasnotgoodwhenthespeedandstabilitymetthedesignrequirements.Whichofthefollowingmeasuresshouldbetaken?（）

答案:Adoptphase-lagcompensator

Whattypicalelementsarethereinautomaticcontrol?（）

答案:Proportionalelement；Inertialelement；Integralanddifferentialelement；Oscillationelement

Whatistheprincipaleffectofaleadcompensationonarootlocus?（）

答案:causethelocusbendtowardtheleft-halfplane.；movethedominantrootstoaplaceofhigherdamping

Whatisnotthefeatureofaphase-lagcompensator?（）

答案:Tobendtherootlocustotheright

Whatinformationcanwereadfromarootlocus?（）

答案:Dampingratio；Stability；Specificgain；Naturalfrequency

Whataretheeffectsofphase-leadnetwork?（）

答案:increasebandwidth；decreasesettlingtime；speeduptransientresponse

WhatactuatorcanconvertMechanicaldeformationtoelectricalenergy?（）

答案:Electricgenerator

Unmannedaerialvehicles(UAVs)arebeingdevelopedtooperateintheairautonomo