Abstract
High speed flows in working hard disk drives (HDDs) can induce off-track vibrations on a head gimbals assembly (HGA), which limit positioning accuracy of the slider magnetic head on the tip of the HGA for high magnetic storage density in disks. This paper presents experimental studies and numerical simulations on the flow-induced vibrations (FIV) of the HGA inside an HDD and active control of such vibrations. First, the HGA off-track vibration and the airflow pressure fluctuations around the HGA are measured to characterise the FIV of the HGA. Second, we propose an active control strategy for such FIV of the HGA, in which feedback acoustic pressures are employed to suppress pressure fluctuations in turbulence around the HGA. Numerical simulations have been carried out on this issue by introducing virtual sensors into the close regions around the HGA. Finally, by using the FIV on the HGA as feedback error signals through the laser Doppler vibrometer, the feedback control of FIV on the HGA has also been demonstrated.
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References
Elliott SJ (2001) Signal processing for active control. Academic Press, London
Huang XY, Wang X, Yap FF (2004) Feedback control of rotating disk flutter in an enclosure. J Fluids Struct 19:917–932
Huang XY, Hoque ME, Wang X (2005) An experimental study on feedback control of rotating disk flutter. J Fluids Struct 20:71–80
Min H, Huang X, Zhang Q (2012a) Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive. IEEE Trans Magn 48:101–106
Min H, Huang X, Zhang Q (2012b) Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing. IEEE Trans Magn (to be published)
Min H, Huang X, Zhang Q (2012c) Active control of flow-induced vibrations on slider in hard disk drives: experimental demonstration. IEEE Trans Magn, under review
Zhang QD, Tan CS, Sundaravadivelu K et al (2010) Mitigation of flow induced vibration of head gimbals assembly. Microsyst Technol 16:213–219
Acknowledgments
This project (No. 092-156-0128) is funded by A*STAR of Singapore.
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© 2014 Springer-Verlag Berlin Heidelberg
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Huang, X.Y., Min, H., Zhang, Q.D. (2014). Feedback Control of Flow-Induced Vibrations on Head Gimbals Assembly Inside Hard Disk Drives. In: Zhou, Y., Liu, Y., Huang, L., Hodges, D. (eds) Fluid-Structure-Sound Interactions and Control. Lecture Notes in Mechanical Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40371-2_58
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DOI: https://doi.org/10.1007/978-3-642-40371-2_58
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-40370-5
Online ISBN: 978-3-642-40371-2
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