Radial tracking in high-speed DVD players (an application of notch filtering and multirate control)

Author

Bittanti, Sergio ; Dell´Orto, F. ; Carlo, Andrea Di ; Savaresi, Sergio M.

Author_Institution

Dipt. di Elettronica e Inf., Politecnico di Milano, Italy

Volume

5

fYear

2001

fDate

2001

Firstpage

4705

Abstract

The problem considered is the radial tracking of the optical pick-up in a DVD-ROM. For low-speed players, it is known that this problem can be solved by means of simple lead-lag regulators. For high-speed players, the servo design is much more tricky, and a more sophisticated control scheme is required. The control scheme proposed is constituted by a lead-lag filter, two notch filters and a low-pass filter. This set of filters is implemented in a parallel structure. This architecture is adequate to provide a good radial tracking. The performance of the controller are tested on a real plant, and experimental results are reported

Keywords

low-pass filters; notch filters; optical tracking; position control; video discs; DVD; Digital Versatile Disc; lead-lag filter; low-pass filter; notch filters; optical pick-up; radial tracking; DVD; Error correction; High speed optical techniques; Laser beams; Low pass filters; Optical devices; Optical filters; Servomechanisms; Surface emitting lasers; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 2001. Proceedings of the 40th IEEE Conference on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-7061-9

Type

conf

DOI

10.1109/.2001.980949

Filename

980949