Přístupnostní navigace
E-přihláška
Vyhledávání Vyhledat Zavřít
Detail publikace
HNILIČKA, B., BESANCON-VODA, A., SCHROEDER, H.
Originální název
Modelling the focus error signal generation in a DVD player
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
This paper presents a new method for modelling the focus error signal generation in a DVD player (so called the S-curve), using optical theory. The model is applied to an industrial system, developed in STMicroelectronics laboratories, and it can be useful firstly during the start-up procedure (when data layer is searched for) and secondly during normal playing mode, to tune the controller gain for the desired closed-loop bandwidth. An analytical and a numerical model, based on astigmatic method and on opto-geometrical analysis, are given and the influence of models parameters on the focus error signal is discussed. To estimate the unknown models parameters, a curve fitting method is applied, using measured data from the industrial system. The model quality is illustrated from a comparison with the real focus error signal, acquired during the start-up procedure (from open loop to closed loop). The results of this modelling are included in the DVD focus closed loop to design more sophisticated controllers for focus error minimization.
Klíčová slova v angličtině
Focus error signal
Autoři
Rok RIV
2003
Vydáno
9. 7. 2003
Nakladatel
Ecole Centrale de Lille
Místo
Lille
ISBN
2-9512309-5-8
Kniha
IMACS Multiconference Computational Engineering in Systems Applications
Strany od
11
Strany do
18
Strany počet
8
BibTex
@inproceedings{BUT7916, author="Bohumil {Hnilička} and Alina {Besancon-Voda} and Heinz-Joerg {Schroeder}", title="Modelling the focus error signal generation in a DVD player", booktitle="IMACS Multiconference Computational Engineering in Systems Applications", year="2003", pages="8", publisher="Ecole Centrale de Lille", address="Lille", isbn="2-9512309-5-8" }