A nonlinear control scheme for fast settling in hard disk drives

Author

Li, Ying ; Guo, Guoxiao ; Wang, Youyi

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2086

Lastpage

2088

Abstract

Conventional integral compensation to deal with unknown bias usually leads to long settling process in hard disk drives. This paper proposes a nonlinear proportional integral derivative control scheme to shorten the settling time by reducing the overshoot caused by the integrator, without degradation of other performance specifications. Experiment results show that it is robust against different bias sizes and step sizes. Furthermore, the single-track seek time can scale down well with the track pitch.

Keywords

hard discs; nonlinear control systems; three-term control; bias size; hard disk drives; integral compensation; integral derivative control; integrator; nonlinear control; nonlinear proportional control; overshoot reduction; settling time; single-track seek time; step size; track pitch; unknown bias; Bandwidth; Degradation; Hard disks; PD control; Pi control; Power engineering and energy; Proportional control; Servomechanisms; Shape control; Three-term control; Bias; HDD; hard disk drive; nonlinear control; settling time;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.832275

Filename

1325414