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公开(公告)号：US09934802B2
公开(公告)日：2018-04-03
申请号：US15670942
申请日：2017-08-07
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Reed D. Hanson , Kenneth A. Haapala , Dwight R. Kinney , Xinghui Huang
CPC classification number: G11B5/556 , G11B5/4873 , G11B5/59622
Abstract: Systems and methods for compensating for hysteresis in a disc drive are described. In one embodiment, a method may use an inverse hysteresis model to linearize effects of hysteresis of a microactuator in the disc drive. The hysteresis model may be a Coleman-Hodgdon hysteresis model. The hysteresis of the microactuator may be characterized, and the inverse hysteresis model may be based at least in part on the characterization. The inverse hysteresis model may be used to implement a digital filter. The digital filter may be employed in series with the microactuator to linearize the effects of hysteresis.
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Patent Agency Ranking
公开(公告)号：US10068598B2
公开(公告)日：2018-09-04
申请号：US15915520
申请日：2018-03-08
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Reed D. Hanson , Kenneth A. Haapala , Dwight R. Kinney , Xinghui Huang
CPC classification number: G11B5/556 , G11B5/4873 , G11B5/59622
Abstract: Systems and methods for compensating for hysteresis in a disc drive are described. In one embodiment, a method may use an inverse hysteresis model to linearize effects of hysteresis of a microactuator in the disc drive. The hysteresis model may be a Coleman-Hodgdon hysteresis model. The hysteresis of the microactuator may be characterized, and the inverse hysteresis model may be based at least in part on the characterization. The inverse hysteresis model may be used to implement a digital filter. The digital filter may be employed in series with the microactuator to linearize the effects of hysteresis.
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公开(公告)号：US09905273B2
公开(公告)日：2018-02-27
申请号：US15138280
申请日：2016-04-26
Applicant: Seagate Technology LLC
Inventor： Antanas Daugela , Neal F. Gunderson , Reed D. Hanson , Ricardo P. Freeman , Andrew R. Motzko , Erik J. Lindquist
CPC classification number: G11B33/08 , G11B5/4813 , G11B5/4833 , G11B5/4873 , G11B5/5582 , G11B5/59694 , G11B33/10
Abstract: An apparatus includes an actuator assembly, a dampening assembly coupled to the actuator assembly, and a vibration sensor assembly coupled to the dampening assembly and coupled to the actuator assembly by way of the dampening assembly. A method includes attaching a dampening assembly to an actuator assembly and attaching a vibration sensor assembly to the dampening assembly. The dampening assembly is positioned between the vibration sensor assembly and the actuator assembly.
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公开(公告)号：US20170309312A1
公开(公告)日：2017-10-26
申请号：US15138280
申请日：2016-04-26
Applicant: Seagate Technology LLC
Inventor： Antanas Daugela , Neal F. Gunderson , Reed D. Hanson , Ricardo P. Freeman , Andrew R. Motzko , Erik J. Lindquist
CPC classification number: G11B33/08 , G11B5/4813 , G11B5/4833 , G11B5/4873 , G11B5/5582 , G11B5/59694 , G11B33/10
Abstract: An apparatus includes an actuator assembly, a dampening assembly coupled to the actuator assembly, and a vibration sensor assembly coupled to the dampening assembly and coupled to the actuator assembly by way of the dampening assembly. A method includes attaching a dampening assembly to an actuator assembly and attaching a vibration sensor assembly to the dampening assembly. The dampening assembly is positioned between the vibration sensor assembly and the actuator assembly.
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公开(公告)号：US09741379B1
公开(公告)日：2017-08-22
申请号：US15099383
申请日：2016-04-14
Applicant: Seagate Technology LLC
Inventor： Reed D. Hanson , Kenneth A. Haapala
CPC classification number: G11B5/5547 , G11B5/5552 , G11B5/5556 , G11B5/556
Abstract: A method is disclosed for positioning a transducer over a magnetic recording medium having a plurality of tracks. The method includes positioning the transducer over a first track using a voice coil motor (VCM) and a microactuator. The method further includes applying a feedforward voltage profile to the microactuator to position the transducer over a second track.
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公开(公告)号：US09728213B1
公开(公告)日：2017-08-08
申请号：US15170811
申请日：2016-06-01
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Reed D. Hanson , Kenneth A. Haapala , Dwight R. Kinney , Xinghui Huang
CPC classification number: G11B5/556 , G11B5/4873 , G11B5/59622
Abstract: Systems and methods for compensating for hysteresis in a disc drive are described. In one embodiment, a method may use an inverse hysteresis model to linearize effects of hysteresis of a microactuator in the disc drive. The hysteresis model may be a Coleman-Hodgdon hysteresis model. The hysteresis of the microactuator may be characterized, and the inverse hysteresis model may be based at least in part on the characterization. The inverse hysteresis model may be used to implement a digital filter. The digital filter may be employed in series with the microactuator to linearize the effects of hysteresis.
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