On the aerodynamic pressure fluctuation around the head gimbals assembly inducing the slider vibration in a hard disk drive
Date of Issue2011
International Congress on Sound and Vibration (18th : 2011 : Rio de Janeiro, Brazil)
School of Mechanical and Aerospace Engineering
The spectrum-spatio characteristics of the pressure fluctuation around the head gimbals assembly (HGA) in an actual HDD is studied experimentally to understand the excitation of the flow-induced vibration (FIV) of the HGA in HDDs. Aerodynamic excitation around the HGA is detected by a proposed method of measuring pressure fluctuation on the cover innersurface of an HDD. The results show that the principal non-repeatable run out (NRRO) peaks in the off-track vibration spectra of the HGA are in narrow bands around 1.83 kHz and 2.54 kHz and are dominated by the aerodynamic pressure fluctuation around the HGA. In addition, aerodynamic pressure disturbance in the narrow space of the HDD is found to remain highly coherent at frequencies around the principle peaks. The proposed method for detecting the aerodynamic pressure disturbance around the HGA is shown to be feasible and can be used for signal sensing in future active control on pressure fluctuation in HDDs.
DRNTU::Engineering::Mechanical engineering::Fluid mechanics
© 2011 18th International Congress on Sound & Vibration. This is the author created version of a work that has been peer reviewed and accepted for publication by 18th International Congress on Sound & Vibration. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The official conference website is: http://www.icsv18.org/.