A wavelet network control method for disk drives

Author

Chang, C.M. ; Liu, T.S.

Author_Institution

Dept. of Mech. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

14

Issue

1

fYear

2006

Firstpage

63

Lastpage

68

Abstract

This paper proposes a wavelet network control method to online learn and cancel repetitive errors in disk drives. In contrast to Fourier transforms, wavelet transforms can provide detailed local information of signals. Based on the wavelet transform, wavelets can approximate any finite energy function. This paper proposes wavelet networks to approximate periodic functions. Accordingly, a wavelet network controller is developed to eliminate repetitive error caused by repetitive disturbance. Experiments for flying height control of a disk drive system are implemented to demonstrate the present method in comparison with another method using Fourier series based network control.

Keywords

disc drives; error compensation; position control; wavelet transforms; disk drives; flying height control; repetitive error elimination; wavelet network control; wavelet transforms; Control systems; Disk drives; Displacement control; Error correction; Fourier transforms; Function approximation; Laser feedback; Open loop systems; Surface treatment; Wavelet transforms; Bender; PZT; disk drive; flying height control; repetitive error; wavelet network (WN); wavelet theory;

fLanguage

English

Journal_Title

Control Systems Technology, IEEE Transactions on

Publisher

ieee

ISSN

1063-6536

Type

jour

DOI

10.1109/TCST.2005.860523

Filename

1564096