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公开(公告)号：US20190267033A1
公开(公告)日：2019-08-29
申请号：US16124566
申请日：2018-09-07
Applicant: Seagate Technology LLC
Inventor： Tzung-Sz Shen , Bin Huang , Raye Sosseh , Ying Qi
IPC: G11B5/596
Abstract: Implementations disclosed herein include a method to synthesize the controller of a multi-stage servo control system with multiple actuators in a hard disk drive by dividing controller synthesis into multiple dual-stage steps. The method includes measuring a first output of a first plant corresponding to a first actuator, measuring a second output of a second plant corresponding to a second actuator, designing a first controller responsive to the first output, designing a second controller responsive to the second output, and combining the first output and the second output to obtain a first combined output in a first dual-stage. The method also includes designing a third controller responsive to the first combined output, measuring a third output from a third plant corresponding to a third actuator, designing a fourth controller responsive to the third output, and combining the first combined output and the third output to obtain a second combined output.
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公开(公告)号：US09691418B1
公开(公告)日：2017-06-27
申请号：US14977313
申请日：2015-12-21
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Wenzhong Zhu , Kenneth A. Haapala , Bin Huang
CPC classification number: G11B5/59627 , G11B5/012 , G11B5/40 , G11B19/046 , G11B20/18 , G11B27/36 , G11B33/144
Abstract: Systems and methods for determining a relationship between write fault threshold and temperature are described. The systems and methods include measuring an operating temperature of the storage device, determining a current operating temperature of the storage device, determining whether the current operating temperature of the storage device satisfies a temperature threshold, and upon determining the current operating temperature of the storage device satisfies the temperature threshold, modifying a write fault threshold associated with a data track of the storage device.
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公开(公告)号：US10418056B1
公开(公告)日：2019-09-17
申请号：US16124566
申请日：2018-09-07
Applicant: Seagate Technology LLC
Inventor： Tzung-Sz Shen , Bin Huang , Raye Sosseh , Ying Qi
Abstract: Implementations disclosed herein include a method to synthesize the controller of a multi-stage servo control system with multiple actuators in a hard disk drive by dividing controller synthesis into multiple dual-stage steps. The method includes measuring a first output of a first plant corresponding to a first actuator, measuring a second output of a second plant corresponding to a second actuator, designing a first controller responsive to the first output, designing a second controller responsive to the second output, and combining the first output and the second output to obtain a first combined output in a first dual-stage. The method also includes designing a third controller responsive to the first combined output, measuring a third output from a third plant corresponding to a third actuator, designing a fourth controller responsive to the third output, and combining the first combined output and the third output to obtain a second combined output.
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公开(公告)号：US10366719B1
公开(公告)日：2019-07-30
申请号：US15925927
申请日：2018-03-20
Applicant: Seagate Technology LLC
Inventor： Jason W. Riddering , Dustin Mark Cvancara , Kenneth A. Haapala , Eric John McCalla , Wenzhong Zhu , Bin Huang
Abstract: A clearance heater of a write head is engaged with a boosted current that exceeds a steady-state current. The steady-state current causes the write head to maintain a desired clearance over a disk during writing, the boosted current being applied before a start of the writing. The boosted current is monotonically decreased before the start of the writing and the steady-state current is applied to the heater after the start of the writing.
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Patent Agency Ranking
公开(公告)号：US10096332B1
公开(公告)日：2018-10-09
申请号：US15907830
申请日：2018-02-28
Applicant: Seagate Technology LLC
Inventor： Tzung-Sz Shen , Bin Huang , Raye Sosseh , Ying Qi
Abstract: Implementations disclosed herein include a method to synthesize the controller of a multi-stage servo control system with multiple actuators in a hard disk drive by dividing controller synthesis into multiple dual-stage steps. The method includes measuring a first output of a first plant corresponding to a first actuator, measuring a second output of a second plant corresponding to a second actuator, designing a first controller responsive to the first output, designing a second controller responsive to the second output, and combining the first output and the second output to obtain a first combined output in a first dual-stage. The method also includes designing a third controller responsive to the first combined output, measuring a third output from a third plant corresponding to a third actuator, designing a fourth controller responsive to the third output, and combining the first combined output and the third output to obtain a second combined output.
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公开(公告)号：US20170178672A1
公开(公告)日：2017-06-22
申请号：US14977313
申请日：2015-12-21
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Wenzhong Zhu , Kenneth A. Haapala , Bin Huang
CPC classification number: G11B5/59627 , G11B5/012 , G11B5/40 , G11B19/046 , G11B20/18 , G11B27/36 , G11B33/144
Abstract: Systems and methods for determining a relationship between write fault threshold and temperature are described. The systems and methods include measuring an operating temperature of the storage device, determining a current operating temperature of the storage device, determining whether the current operating temperature of the storage device satisfies a temperature threshold, and upon determining the current operating temperature of the storage device satisfies the temperature threshold, modifying a write fault threshold associated with a data track of the storage device.
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公开(公告)号：US10014020B2
公开(公告)日：2018-07-03
申请号：US15591270
申请日：2017-05-10
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Wenzhong Zhu , Kenneth A. Haapala , Bin Huang
CPC classification number: G11B5/59627 , G11B5/012 , G11B5/40 , G11B19/046 , G11B20/18 , G11B27/36 , G11B33/144
Abstract: Systems and methods for determining a relationship between write fault threshold and temperature are described. The systems and methods include measuring an operating temperature of the storage device, determining a current operating temperature of the storage device, determining whether the current operating temperature of the storage device satisfies a temperature threshold, and upon determining the current operating temperature of the storage device satisfies the temperature threshold, modifying a write fault threshold associated with a data track of the storage device.
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公开(公告)号：US09818438B1
公开(公告)日：2017-11-14
申请号：US15281219
申请日：2016-09-30
Applicant: Seagate Technology LLC
Inventor： Wenzhong Zhu , Gary E. Hillukka , Bin Huang
CPC classification number: G11B5/59627 , G11B5/56
Abstract: A system may compensate for skew in a patterned medium, such as but not limited to a self-assembling bit patterned medium, with a write pole separated from a data storage medium by an air bearing. The write pole being connected to a controller. The data storage medium can have a plurality of magnetic islands arranged in data tracks with each data track having a track center. The write pole may be selectively shifted from the track center by the controller to compensate for a skewed write pole configuration.
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公开(公告)号：US20170243609A1
公开(公告)日：2017-08-24
申请号：US15591270
申请日：2017-05-10
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Wenzhong Zhu , Kenneth A. Haapala , Bin Huang
CPC classification number: G11B5/59627 , G11B5/012 , G11B5/40 , G11B19/046 , G11B20/18 , G11B27/36 , G11B33/144
Abstract: Systems and methods for determining a relationship between write fault threshold and temperature are described. The systems and methods include measuring an operating temperature of the storage device, determining a current operating temperature of the storage device, determining whether the current operating temperature of the storage device satisfies a temperature threshold, and upon determining the current operating temperature of the storage device satisfies the temperature threshold, modifying a write fault threshold associated with a data track of the storage device.
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