Kalman
Mostrando 13-24 de 365 artigos, teses e dissertações.
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13. Use of a combined SVD-Kalman filter approach for induction motor broken rotor bars identification
Abstract This paper describes a new parametric spectral estimator for the identification of rotor bar fault of an induction motor by analyzing the stator current. This approach combines two methods: The first one, the Singular Value Decomposition method which allows the accurate detection and location of the fault's signature frequency. The second method all
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-03
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14. Comparing an Ensemble Kalman Filter to a 4DVAR Data Assimilation System in Chaotic Dynamics
ABSTRACT: In this paper, the Ensemble Kalman Filter is compared with a 4DVAR Data Assimilation System in chaotic dynamics. The Lorenz model is chosen for its simplicity in structure and the dynamic similarities with primitive equations models, such as modern numerical weather forecasting. It was examined if the Ensemble Kalman Filter and 4DVAR are effective
J. Aerosp. Technol. Manag.. Publicado em: 2017-12
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15. Fundos de previdência privada: passividade a preços de fundos ativos
RESUMO De 2005 a 2015, o total de ativos geridos por fundos de previdência privada aberta no Brasil mais do que sextuplicou, com o Plano Gerador de Benefícios Livres (PGBL) e o Vida Gerador de Benefícios Livres (VGBL) representando 90% desses ativos. Entretanto, as instituições de previdência privada têm como característica a cobrança de elevadas ta
Rev. contab. finanç.. Publicado em: 06/11/2017
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16. Recurrent Algorithm for TDOA Localization in Sensor Networks
ABSTRACT: Using the mathematical apparatus of the extended Kalman Filter, the recurrent algorithm of the passive location in sensor networks - based on the Time Difference of Arrival method in case of correlated errors of measurements - is developed. The initial estimates of Radio Frequency Sources coordinates and the correlation matrix of the vector estimat
J. Aerosp. Technol. Manag.. Publicado em: 02/10/2017
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17. MEASUREMENT AND ANALYSIS OF A FIELD AREA BASED ON AN ADAPTIVE KALMAN FILTER
ABSTRACT: This paper proposed the use of an adaptive Kalman filter (AFK) to improve Global Positioning System (GPS) positioning accuracy to measure a tractor operational area. First, we used MATLAB to identify the operation trajectory. Then, we used different colors to show the area of operation. Finally, we used an image-processing method to calculate the e
Eng. Agríc.. Publicado em: 2017-09
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18. The ITASAT CubeSat Development and Design
ABSTRACT: Because they are inexpensive platforms for satellites, CubeSats have become a low-cost way for universities and even developing countries to have access to space technology. This paper presents the ITASAT design, particularly the Attitude Determination and Control Subsystem, the Onboard Software, and the Assembly, Integration and Testing program. T
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
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19. Cientistas Sociais Latino-americanos nos Estados Unidos: Cooperação Acadêmica, Mobilidade Internacional e Trajetórias Interamericanas em torno da Fundação Ford
RESUMO O principal objetivo deste artigo consiste em examinar as redes de cooperação acadêmica e os canais de mobilidade internacional estabelecidos pela Fundação Ford na América Latina, os quais intervieram como plataformas para a promoção, em terras estadunidenses, de cientistas sociais da região. O interesse reside em compreender as interações
Dados. Publicado em: 2017-04
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20. Análise por Speckle-Tracking com Ecocardiografia 3D da Deformação de Átrio Esquerdo em Pacientes com Tetralogia de Fallot Corrigida (do MAGYAR-Path Study)
Resumo Fundamento: Ecocardiografia tridimensional (3D) acoplada à técnica de speckle-tracking (3DSTE) é uma nova metodologia útil para a avaliação de volumes e propriedades funcionais do átrio esquerdo (AE). Há crescente interesse científico na análise da deformação miocárdica em adultos com tetralogia de Fallot corrigida (cTOF). Objetivos: Co
Arq. Bras. Cardiol.. Publicado em: 13/02/2017
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21. Rotação de Corpo Rígido do Ventrículo Esquerdo na Anomalia de Ebstein a Partir do Estudo MAGYAR-Path
Arq. Bras. Cardiol.. Publicado em: 2016-06
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22. Micro-motion Recognition of Spatial Cone Target Based on ISAR Image Sequences
ABSTRACT The accurate micro-motions recognition of spatial cone target is the foundation of the characteristic parameter acquisition. For this reason, a micro-motion recognition method based on the distinguishing characteristics extracted from the Inverse Synthetic Aperture Radar (ISAR) sequences is proposed in this paper. The projection trajectory formula o
J. Aerosp. Technol. Manag.. Publicado em: 2016-06
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23. RE: The value of testicular ultrasound in the prediction of the type and size of testicular tumors
Int. braz j urol.. Publicado em: 2016-04
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24. Unscented Kalman Filter for Determination of Spacecraft Attitude Using Different Attitude Parameterizations and Real Data
ABSTRACT The non-linear estimators are certainly the most important algorithms applied to real problems, especially those involving the attitude estimation of spacecraft. The purpose of this paper was to use real data of sensors to analyze the behavior of Unscented Kalman Filter (UKF) in attitude estimation problems when it is represented in different ways a
J. Aerosp. Technol. Manag.. Publicado em: 2016-03