标签: further

FurtherresultsonthesynthesisofPIDcontrollers

ThereareseveralwaystocalculatetheDiscreteFourierTransform(DFT),suchassolvingsimultaneouslinearequationsorthecorrelationmethoddescribedinChapter8.TheFastFourierTransform(FFT)isanothermethodforcalculatingtheDFT.Whileitproducesthesameresultastheotherapproaches,itisincrediblymoreefficient,oftenreducingthecomputationtimebyhundreds.Thisisthesameimprovementasflyinginajetaircraftversuswalking!IftheFFTwerenotavailable,manyofthetechniquesdescribedinthisbookwouldnotbepractical.WhiletheFFTonlyrequiresafewdozenlinesofcode,itisoneofthemostcomplicatedalgorithmsinDSP.Butdon'tdespair!YoucaneasilyusepublishedFFTroutineswithoutfullyunderstandingtheinternalworkings.CHAPTERTheFastFourierTransform12ThereareseveralwaystocalculatetheDiscreteFourierTransform(DFT),suchassolvingsimultaneouslinearequationsorthecorrelationmethoddescribedinChapter8.TheFastFourierTransform(FFT)isanothermethodforcalculatingtheDFT.Whileitproducesthesameresultastheotherapproaches,itisincrediblymoreefficient,oftenreducingthecomputationtimebyhundreds.Thisisthesameimprovementasflyinginajetaircraftversuswalking!IftheFFTwerenotavailable,manyofthetechniquesdescribedinthisbookwouldnotbepractical.WhiletheFFTonlyrequiresafewdozenlinesofcode,itisoneofthemostcomplicatedalgorithmsinDSP.Butdon'tdespair!YoucaneasilyusepublishedFFTrou……