Double-Peaks Suppression On Flow-Induced Vibration Of The Head-Gimbal Assembly In Hard Disk Drives

This work investigates the double-peaks suppression on flow-induced vibration (FIV) of the head-gimbal assembly (HGA) in a hard disk drive (HDD) using a PZT actuator. The PZT exciting voltage is designed through the FIV spectrum which is divided into two parts. Each part contains the frequency range of the focused two principal peaks. A simultaneous suppression up to 3.35 nm (15.3%) and 1.19 nm (96.7%) of the FIV amplitude of HGA is achieved at 1,760 Hz and 3,245 Hz in one control, respectively.