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

IPC: G11B5/52 ,  G11B5/54 ,  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.

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

IPC: G11B20/00 ,  G11B5/55

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.

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.