Modeling and simulation of a digital focusing servo control system for an optical disk tester

Persistent Link:
http://hdl.handle.net/10150/278589
Title:
Modeling and simulation of a digital focusing servo control system for an optical disk tester
Author:
Bates, Farah
Issue Date:
1997
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The design of a digital focus servo control system for an optical disk tester is presented. A total focus misregistration budget is established for three primary disturbances: disk runout, shock, and system noise. The design of an analog servo system is established first to determine the required bandwidth. The analog design is transformed into a digital representation using pole/zero mapping techniques. The transformation to the digital domain includes the effects of the control law computation time, the D/A sample and hold, and the anti-aliasing filter. Modeling and simulation of the digital system in the frequency and time domain are used to obtain the phase margin and the transient response. The transient response overshoot is larger than that obtained from a second order model. The larger overshoot is a result of the additional phase delay produced in the digital system that reduces the gain margin drastically compared to the analog case.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Electronics and Electrical.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Electrical and computer engineering
Degree Grantor:
University of Arizona
Advisor:
Cellier, Francois E.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleModeling and simulation of a digital focusing servo control system for an optical disk testeren_US
dc.creatorBates, Farahen_US
dc.contributor.authorBates, Farahen_US
dc.date.issued1997en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe design of a digital focus servo control system for an optical disk tester is presented. A total focus misregistration budget is established for three primary disturbances: disk runout, shock, and system noise. The design of an analog servo system is established first to determine the required bandwidth. The analog design is transformed into a digital representation using pole/zero mapping techniques. The transformation to the digital domain includes the effects of the control law computation time, the D/A sample and hold, and the anti-aliasing filter. Modeling and simulation of the digital system in the frequency and time domain are used to obtain the phase margin and the transient response. The transient response overshoot is larger than that obtained from a second order model. The larger overshoot is a result of the additional phase delay produced in the digital system that reduces the gain margin drastically compared to the analog case.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Electronics and Electrical.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineElectrical and computer engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorCellier, Francois E.en_US
dc.identifier.proquest1384553en_US
dc.identifier.bibrecord.b34801480en_US
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