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US 7,605,994 B2Granted
Multiple sinusoidal seek servo system for reducing seek acoustics and seek time in hard disk drives
AssigneeSamsung Electronics Co., Ltd.
InventorsChang-Ik Kang, Young-Hoon Kim, Sang-Hoon Chu
Life of this patent
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Abstract
A hard disk drive that includes a voice coil motor controlled by a servo. The servo provides a driving signal that has multiple sinusoidal waveforms. The multi-sinusoidal waveforms minimize seek time and vibrations in the drive.
Claims11
A hard disk drive, comprising:
- a disk;
- a head coupled to said disk;
- an actuator arm coupled to said head;
- a voice coil motor actuator coupled to said actuator arm;
- and,
- a servo coupled to said voice coil motor, said servo provides a driving current to said voice coil motor, said driving current being a function of at least one seek trajectory that has multiple sinusoidal components including at least two components that have different frequencies, said servo means includes a feed forward control loop.
3 more elements
A hard disk drive, comprising:
- a disk;
- a head coupled to said disk;
- an actuator arm coupled to said head;
- a voice coil motor actuator coupled to said actuator arm;
- and,
- servo means for providing a driving current to said voice coil, said driving current being a function of at least one seek trajectory that has multiple sinusoidal components including at least two components that have different frequencies, said servo means includes a feed forward loop.
3 more elements
A method for driving a voice coil motor of a hard disk drive, comprising:
- providing a driving current that is a function of a feed forward estimate and at least one seek trajectory that has multiple sinusoidal components, to a voice coil motor;
- and,
- moving the voice coil motor relative to a magnetic disk including at least two components that have different frequencies.
Dependencies are inferred from the claim text.