Estimação de frequência usando sensores de erro com atrasos adaptativos
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FapUNIFESP (SciELO)
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Resumo
This paper proposes a solution to improve the performance of the first order Early Error Sensing (EES) Adaptive Time Delay Tanlock Loops (ATDTL) presented in (Al-Zaabi, Al-Qutayri e Al-Araji, 2005), regarding to frequency estimation and tracking time. The EES-ATDTL are phaselocked-loops (PLL) used to hardware implementations, due to their simple structure. Fixed-points theorems are used to determine conditions for rapid convergence of the estimation process and a estimative of the frecuency input is obtained with a Gaussian filter that improves the gain adaptation. The mathematical models are the presented by (Al-Araji, Al-Qutayri e Al-Zaabi, 2006). Simulations have been performed to evaluate the theoretical results.
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Palavras-chave
Adaptive gain , Digital PLL , Early Error Sensing time Delay Tan-lock Loop , Fixed-point theorem , Gaussian filter , Synchronism , Fixed point theorems , Gaussian filters , Delay lock loops , Estimation , Frequency estimation , Hardware , Mathematical models , Synchronization , Time delay , Aluminum
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Português
Citação
Controle y Automacao, v. 22, n. 4, p. 390-397, 2011.
