Time optimal seek control for a coupled dual stage disk drive actuator

Author

Yang, Jian-Dong ; Pan, Long-Fa ; Pei, Xian-Deng ; Xie, Chang-Sheng ; Cao, Xiang-Ying ; Xu, Duan-Yi

Author_Institution

Opt. Memory Nat. Eng. Res. Center, Tsinghua Univ., Beijing, China

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

2629

Lastpage

2631

Abstract

A unified expression and three typical kinds of seeking trajectories of the time optimal control of a dual stage disk drive actuator with passive coupling between the two stages are presented. Necessary conditions for finding the optimal control for the problem with state-variable constraints are applied to derive the solution. Numerical calculations and computer simulations were performed to get the trajectories. The experimental trajectories of 1/3 full stroke for a disk drive are also presented. A DSP (Digital Signal Processor) based control system is used to implement the optimal control. The time optimal seek control features cooperative control of the two stages of the actuators, and seek time can decrease as compared with one-stage seeking when the fine actuator locked onto the coarse actuator

Keywords

actuators; magnetic disc storage; optical disc storage; time optimal control; DSP; computer simulation; cooperative control; dual stage disk drive actuator; passive coupling; seeking trajectory; time optimal control; Actuators; Computer simulation; Control systems; Digital signal processing; Digital signal processors; Disk drives; Optical computing; Optical control; Optical coupling; Optimal control; Process control; Springs; Switches; Weight control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617430

Filename

617430