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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.2008.tde-01102008-101015
Document
Author
Full name
Marcus Vinícius Richardelle Unzueta
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2008
Supervisor
Committee
Piqueira, José Roberto Castilho (President)
Ferreira, André Alves
Orsatti, Fernando Moya
Title in Portuguese
Uma contribuição ao estudo das redes mutuamente conectadas de DPLLs usando modelos de tempo discreto.
Keywords in Portuguese
Sistemas dinâmicos
Abstract in Portuguese
Este trabalho tem por objetivo apresentar uma nova forma de analisar as redes de sincronismo de fase mutuamente conectadas. Estas redes são formadas por Phase-Locked Loops digitais ou DPLLs. O sinal gerado por cada DPLL é enviado a todos os demais dispositivos, formando a rede mutuamente conectada. Parte-se do pressuposto de que as ligações entre os dispositivos são dotadas de atrasos, o que dificulta o tratamento do problema. No entanto, é apresentado aqui um método para análise das malhas de sincronismo via discretização do modelo de tempo contínuo, objetivando dirimir essa dificuldade, já que atrasos são facilmente representados em modelos de tempo discreto. Para tanto, o modelo da rede no espaço de estados é equacionado a partir da rede. Esse modelo no espaço de estados é, então, discretizado e, enfim, pode-se determinar o estado síncrono da rede incluindo a freqüência de sincronismo e analisar sua estabilidade. Como se poderá constatar, escolhendo um período de amostragem adequado, pode-se representar o comportamento das redes de sincronismo com modelos discretos, obtendo elevado grau de precisão.
Title in English
A contribution to study of mutually-connected DPLL networks using discrete time models.
Keywords in English
Discretization
Dynamic systems
Mutually-connected PLL networks
Time delay systems
Abstract in English
This work introduces a new method for studying a mutually-delayed-connected network of Digital Phase-Locked Loops DPLLs. The signal generated by a DPLL in the network is sent to all other devices in this same network. Because of delayed signals, it is difficult to treat this problem. So, its shown here a method for analyzing the networks via discretization of continuous time delay model in order to deal with this issue easily, considering that delays are naturally represented in discrete time models. First of all, a continuous state space model is obtained from mutually-connected network. Then, this model is discretized and, finally, the synchronous state can be determined and the stability can be analyzed. As shown below, choosing a proper time sample, the behavior of mutually-delayed-connected networks can be approximately represented by a discrete time model.
 
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Publishing Date
2008-10-08
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • PIQUEIRA, J. R. C., e UNZUETA, M. V. R. Malhas de Sincronismo de Fase. In XX Simpósio Internacional de Iniciação Científica da USP, São Carlos-SP, 2002. 2002 SIICUSP.São Paulo : Sonopress Rimo Ind. e Com. Fonográfica, 2002. Resumo.
  • UNZUETA, M. V. R., and PIQUEIRA, J. R. C. Discretization of a Continuous Time Delay System via Interpolation [doi:10.1109/SSST.2008.4480200]. In 40th Southeastern Symposium on System Theory, New Orleans, 2008. Proceedings of the 40th Southeastern Symposium on System Theory.Piscataway, NJ : IEEE-Institute of Electrical and Eletronics Engineers, Inc., 2008.
All rights of the thesis/dissertation are from the authors
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