Results 211 to 220 of about 7,393 (263)

Hard Disk Drives Control in Mobile Applications

Journal of Systems Science and Complexity, 2007
In this paper, control design is investigated for hard disk drives in mobile applications with unknown external arbitrarily fast time-varying disturbances. The disturbances can be estimated with exponential accuracy using the proposed disturbance observer based on a series of integral filters.
Shuzhi Sam Ge, Beibei Ren, Tong Heng Lee
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Adaptive Tuning and Control of a Hard Disk Drive

2007 American Control Conference, 2007
This paper deals with the implementation of adaptive tuning and control on a computer hard disk drive (HDD). A model-based adaptive loop is added to a LTI stabilizing controller to minimize the position control error of the HDD head. This adaptive loop may be used in either of two modes: control tuning (CT) or real-time fully adaptive control (RTFAC ...
Néstor Osvaldo Pérez-Arancibia, Tsu-Chin Tsao, Steve Gibson 0001   +2 more
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Head–disk contact detection in the hard-disk drives

Wear, 2003
Abstract The increasing capacity of current hard-disk drives places a great importance on reliability, as tens of gigabytes of data can be lost in an instant due to a single tribological failure event. To improve the reliability of the head–disk interface there is a need to predict, measure and monitor any interactions during manufacture. This paper
Andrei Khurshudov, Peter Ivett
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Hard disk drive multimedia

The Electronic Library, 1993
A multimedia effect can be provided by programs which use the hard disk drives of PCs. Knowledge Adventure and Science Adventure are two programs providing a multimedia experience without the use of CDROM. Knowledge Adventure provides information on general subjects while Science Adventure concentrates on science material with text taken from a book by
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Computing the aeroelastic disk vibrations in a hard disk drive

Journal of Fluids and Structures, 2008
Abstract The turbulent flow of air caused by the spinning of a single disk inside a typical hard disk drive casing is calculated using large eddy simulation (LES). The pressure acting on the disk is recorded as a function of time and is used to compute the vibrations of the spinning disk using a self-developed hybrid-spectral finite-difference code ...
S. Kirpekar, D.B. Bogy
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A Low-Power Write Driver for Hard Disk Drives

IEICE Transactions on Electronics, 2005
This paper describes a new low-power write driver circuit for mobile hard disk drive preamplifiers. To achieve low power consumption, we developed a write driver circuit with a single-stage MOS transistor as the current driver, which both switches and controls the write current.
Tatsuya Kawashimo, Hiroki Yamashita, Masayoshi Yagyu, Fumio Yuki   +3 more
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Modeling and cancellation of pivot nonlinearity in hard disk drives

IEEE Transactions on Magnetics, 2002
In this paper, the modeling issue of the pivot nonlinearity in a typical hard disk drive is considered. Viscous friction, Coulomb friction and hysteresis effects are taken into account. Based on the proposed model, a nonlinear compensator is designed to make the compensated system to behave like a double integrator regardless of the magnitude of the ...
Jian Qin Gong, Lin Guo, Ho Seong Lee, Bin Yao   +3 more
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Perpendicular recording media for hard disk drives

Journal of Applied Physics, 2007
Perpendicular recording technology has recently been introduced in hard disk drives for computer and consumer electronics applications. Although conceptualized in the late 1970s, making a product with perpendicular recording that has competing performance, reliability, and price advantage over the prevalent longitudinal recording technology has taken ...
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Use of MEMS based accelerometers in hard disk drives

2001 IEEE/ASME International Conference on Advanced Intelligent Mechatronics. Proceedings (Cat. No.01TH8556), 2002
In this paper we describe the use of MEMS based accelerometers for the compensation of the effects of self-induced and external vibrations in commercial hard disk drives (HDD). Using a formal analysis on the HDD mechanics, the effects of a generic roto-translation of the HDD on the head position are evaluated.
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Precision control of hard disk drives

IEEE Control Systems, 2005
The paper discusses the challenges and trends in the precision control of the head-positioning servomechanism of a hard disk drive. The read/write head is positioned through a voice coil motor (VCM) actuator to which the heads are attached using a thin stainless steel suspension. The servomechanism is expected to move the read/write head from one track
openaire   +1 more source