Signal Processing Digital Techniques
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Attitude Control of a Satellite by Using Digital Signal Processing
Abstract: This article has discussed the development of a three-axis attitude digital controller for an artificial satellite using a digital signal processor. The main motivation of this study is the attitude control system of the satellite Multi-Mission Platform, developed by the Brazilian National Institute for Space Research for application in different s
J. Aerosp. Technol. Manag.. Publicado em: 2012-03
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2. Processamento de sinais de descargas parciais em tempo real com base em wavelets e seleção de coeficientes adaptativa espacialmente
On-line partial discharge (PD) analysis is a highly pursued feature due to the economy related to scheduled shutdowns, disassembling and transport. Nevertheless, on-site PD measurements are frequently limited by interferences found in high-voltage facilities, a situation that imposes the continued development of PD signal processing methods. In the last year
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/11/2011
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3. Objetos tecnopoéticos : transmutações de imagens do repulsivo
The artistic proposal ¿Technopoetic Objects: Transmutations of Images of the Repulsive¿ discusses poetic experimentation using digital painting, video art, computer and control interfaces. In this thesis, Technopoetics use principles such as numerical representation, modularity, automation, variability and transcoding. Technology is explored as a tool for
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Desenvolvimento e teste de protótipos de brincos para identificação eletrônica em suínos / Development and testing of prototypes of ear tags for electronic identification in swine
Is the more relevant subject in tariffs around the world, where the need for food safety and consumer concern about the product consumed leading to the vision of the need to ensure the health, quality and origin of the product. With increasing computing power at a cost flexible techniques of digital signal processing systems coupled to electronic instrumenta
Publicado em: 2010
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5. New technique for the implementation of digital demodulation of fiber optic gyroscopes / Implementação de uma nova tecnica para demodulação digital de sinal de giroscopio a fibra optica
Gyroscopes are devices used to measure angular orientation, being extensively employed for guidance, navigation and stabilization. Among the many types of gyroscopes, IFOG (Interferometer Fiber Optic Gyroscope), based on Sagnac effect, is the most interesting solution due to its high sensitivity, resolution, reliability, small size and EMI immunity. The pres
Publicado em: 2009
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6. GeraÃÃo e avaliaÃÃo de artefatos em vÃdeo digital / Generation and evaluation of artifacts in digital video
Este trabalho teve como objetivo o estudo e a criaÃÃo controlada de artefatos em vÃdeo digital e a sua mensuraÃÃo com o emprego de mÃtricas objetivas. Foram criados artefatos do tipo ruÃdo branco gaussiano, sal e pimenta, borramento, blocagem e travamento. Para avaliaÃÃo de seu impacto no vÃdeo digital foram utilizadas as mÃtricas MSE (Mean Square
Publicado em: 2009
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7. Empirical propagation model to digital TV signals in Curitiba / Modelo de propagaÃÃo empÃrico para sinais de TV digital em Curitiba
The channel modeling is of crucial importance in determining the path loss of RF signals emitted by a transmitter. This work aimed at determining a channel model, by means of the analysis of measurement of the received signals levels from a TV Digital transmitter operating in the UHF range during a survey in the region of Curitiba. From the comparison of som
Publicado em: 2009
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8. Detecção do complexo QRS em sinais cardiacos utilizando FPGA / QRS complex detection in cardiac signals using FPGA
The electrocardiogram (ECG) is a tool used for diagnosis of diseases related to the heart. This work has the purpose of detecting QRS complex, focusing on the R wave, which represents the ventriclescontraction. It is presented two techniques of processing ECG signals. The first uses Pan &Tompkins algorithm based on digital filtering. The second uses the di
Publicado em: 2009
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9. Impacto da utilização de tecnicas de lifting explorando diferença entre ferramentas interpretada e compilada na velocidade computacional da codificação wavelet de imagens estaticas / Impact of using lifting techniques to explore the differences between interpreted and compiled tools in the computational speed of wavelet static image coding
The field of analysis and compression of images has been received special attention of the scientific community because of including in the main systems of digital TV, satellite communications and mobile communications. In this context, the Discrete Transform Wavelet (TWD) arise how a powerful tool and its many advantages allowed your insertion in important
Publicado em: 2009
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10. Detecção de eventos para monitoração de qualidade de energia elétrica por medidores de faturamento usando a Transformada Wavelet e a Norma Euclidiana Instantânea. / Detection of events for monitoring the quality of billing electronic meters by using Wavelet Transform and the Instantaneous Euclidian Norm.
This work shows the possibility to add new functions for detection and registration of disturbances that affect power quality to electronic billing meters. The widespread installation of these meters in the power network makes this resource a powerful analysis tool. Remote communication channels in these meters create an easy way for reading and registering
Publicado em: 2009
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11. Caracterização de sinais elétricos cerebrais de bovinos usando técnicas avançadas de processamento digital de sinais / Bovine brain electrical activity characterization using signal processing advanced techniques
O presente trabalho teve como objetivo caracterizar o sinal cerebral de bovinos quanto a sua complexidade e também a sua extensividade. Para tal foi necessário formar uma base de dados de sinais cerebrais, estes sinais foram adquiridos de novilhas da raça holandesa, na cidade de Pirassununga/SP (latitude 21°5946" Sul e a uma longitude 47°2533" Oeste, al
Publicado em: 2009
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12. Classificação de distúrbios na rede elétrica usando redes neurais e wavelets
Post dispatch analysis of signals obtained from digital disturbances registers provide important information to identify and classify disturbances in systems, looking for a more efficient management of the supply. In order to enhance the task of identifying and classifying the disturbances - providing an automatic assessment - techniques of digital signal pr
Publicado em: 2008