Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing
This paper presents numerical simulations on a feedback active control strategy for flow-induced off-track vibration of a head gimbals assembly (HGA) bearing a slider in hard disk drives (HDDs). In the proposed active control strategy, a physical pressure sensor is assumed on the HDD cover to detect...
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sg-ntu-dr.10356-964912020-03-07T13:22:17Z Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing Min, Hequn Huang, Xiaoyang Zhang, Qide School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering This paper presents numerical simulations on a feedback active control strategy for flow-induced off-track vibration of a head gimbals assembly (HGA) bearing a slider in hard disk drives (HDDs). In the proposed active control strategy, a physical pressure sensor is assumed on the HDD cover to detect the pressure fluctuations and a pressure actuator is on the inner surface of the HDD cover to actuate feedback acoustic pressures to suppress pressure fluctuations in airflow turbulence around the HGA. A virtual sensing method is employed to enable the system feedback signal changeable from the physical pressure sensor to specific “virtual pressure sensors” closely around the HGA. The performance of the proposed active control strategy has been numerically examined based on a turbulence model of a 2-D channel flow with large eddy simulation. The results show that successful active control on the HGA off-track vibration can be achieved if the feedback signal is configured by virtual sensing to minimize the pressure fluctuations at specific positions closely around the HGA. It is also shown that the wake zone of the HGA is a typical virtual sensing position for pressure fluctuations in the feedback control system in order to achieve suppression on the HGA off-track vibration. 2013-12-05T03:01:48Z 2019-12-06T19:31:24Z 2013-12-05T03:01:48Z 2019-12-06T19:31:24Z 2013 2013 Journal Article Min, H., Huang, X., & Zhang, Q. (2013). Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing. IEEE transactions on magnetics, 49(3), 1088-1095. 0018-9464 https://hdl.handle.net/10356/96491 http://hdl.handle.net/10220/18071 10.1109/TMAG.2012.2224878 168616 en IEEE transactions on magnetics |
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DRNTU::Engineering::Mechanical engineering Min, Hequn Huang, Xiaoyang Zhang, Qide Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing |
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This paper presents numerical simulations on a feedback active control strategy for flow-induced off-track vibration of a head gimbals assembly (HGA) bearing a slider in hard disk drives (HDDs). In the proposed active control strategy, a physical pressure sensor is assumed on the HDD cover to detect the pressure fluctuations and a pressure actuator is on the inner surface of the HDD cover to actuate feedback acoustic pressures to suppress pressure fluctuations in airflow turbulence around the HGA. A virtual sensing method is employed to enable the system feedback signal changeable from the physical pressure sensor to specific “virtual pressure sensors” closely around the HGA. The performance of the proposed active control strategy has been numerically examined based on a turbulence model of a 2-D channel flow with large eddy simulation. The results show that successful active control on the HGA off-track vibration can be achieved if the feedback signal is configured by virtual sensing to minimize the pressure fluctuations at specific positions closely around the HGA. It is also shown that the wake zone of the HGA is a typical virtual sensing position for pressure fluctuations in the feedback control system in order to achieve suppression on the HGA off-track vibration. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Min, Hequn Huang, Xiaoyang Zhang, Qide |
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Article |
author |
Min, Hequn Huang, Xiaoyang Zhang, Qide |
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Min, Hequn |
title |
Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing |
title_short |
Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing |
title_full |
Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing |
title_fullStr |
Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing |
title_full_unstemmed |
Active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing |
title_sort |
active control of flow-induced vibrations on slider in hard disk drives by suppressing pressure fluctuations with virtual sensing |
publishDate |
2013 |
url |
https://hdl.handle.net/10356/96491 http://hdl.handle.net/10220/18071 |
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1681038635351146496 |