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- W2183925395 abstract "In HardDiskDrive (HI)D) servo system that uses Voice CoilMotor(VCM)astheactuator, thesensitivity hump isunavoidable according toBode'sIntegral Theorem(BIT). Thatresults inamplification ofdisturbances withfrequencies beyondbandwidth. Thispaperproposes a nonlinear loop shaping method tosuppress sensitivity humpoftheconventional servo. Theproposed nonlinear algorithm consists oftwoparts. Oneistheconventional track-following control law, theother isa nonlinear PD typecontrol lawdesigned basedonthe conventional onetoshapeitshighfrequency response. The simulated describing function showsthatsensitivity peakcanbe suppressed withtheproposed algorithm without degrading low frequency disturbance rejection, whichcouldleadtoincrease thetrack-following accuracy. Theefficacy isverified through vibration test withdiskflutter. Although sensitivity isimproved, theeffect ofhighfrequency measurement noise ontheposition errorsignal (PES) whichisgoverned bycomplementary sensi- tivity function isnotdegraded. Therobustness isalsoverified withhighfrequency plant uncertainties." @default.
- W2183925395 created "2016-06-24" @default.
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- W2183925395 date "2005-01-01" @default.
- W2183925395 modified "2023-09-26" @default.
- W2183925395 title "Nonlinear LoopShaping ForSuppressing Sensitivity HumpinHard DiskDriveServoSystems" @default.
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