Kalman Filter
Mostrando 13-24 de 145 artigos, teses e dissertações.
-
13. 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
-
14. 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
-
15. An Extended Kalman Filter-Based Technique for On-Line Identification of Unmanned Aerial System Parameters
ABSTRACT: The present article deals with the identification, at the same time, of aircraft stability and control parameters taking into account dynamic damping derivatives. Such derivatives, due to the rate of change of the angle of attack, are usually neglected. So the damping characteristics of aircraft dynamics are attributed only on pitch rate derivative
J. Aerosp. Technol. Manag.. Publicado em: 2015-09
-
16. Short-term movements and habitat preferences of sailfish, Istiophorus platypterus (Istiophoridae), along the southeast coast of Brazil
Quatro exemplares de agulhão-vela foram marcados com marcas eletrônicas monitoradas por satélite ('Pop-up satellite archival tags - PSATs') nas águas costeiras do Rio de Janeiro, sudeste do Brasil, durante janeiro e fevereiro de 2009 (agulhão-vela I e II) e entre novembro de 2010 e janeiro de 2011 (agulhão-vela III e IV). O número total de dias monito
Neotrop. ichthyol.. Publicado em: 24/10/2014
-
17. Relative Motion Guidance, Navigation and Control for Autonomous Orbital Rendezvous
ABSTRACT: In this paper, the dynamics of the relative motion problem in a perturbed orbital environment are exploited based on Gauss' variational equations. The relative coordinate frame (Hill frame) is studied to describe the relative motion. A linear high fidelity model is developed to describe the relative motion. This model takes into account primary gra
J. Aerosp. Technol. Manag.. Publicado em: 2014-09
-
18. State estimation of chemical engineering systems tending to multiple solutions
A well-evaluated state covariance matrix avoids error propagation due to divergence issues and, thereby, it is crucial for a successful state estimator design. In this paper we investigate the performance of the state covariance matrices used in three unconstrained Extended Kalman Filter (EKF) formulations and one constrained EKF formulation (CEKF). As bench
Braz. J. Chem. Eng.. Publicado em: 2014-09
-
19. Estimation of Pico-Satellite Attitude Dynamics and External Torques via Unscented Kalman Filter
ABSTRACT: In this study, an Unscented Kalman Filter (UKF) algorithm is designed for estimating the attitude of a pico-satellite and the in-orbit external disturbance torques. The estimation vector is formed by the satellite's attitude, angular rates, and the unknown constant components of the external disturbance torques acting on the satellite. The gravity
J. Aerosp. Technol. Manag.. Publicado em: 2014-06
-
20. Analyzing the Unscented Kalman Filter Robustness for Orbit Determination Through Global Positioning System Signals
ABSTRACT: The nonlinear unscented Kalman filter (UKF) is evaluated for the satellite orbit determination problem, using Global Positioning System (GPS) measurements. The assessment is based on the robustness of the filter. The main subjects for the evaluation are convergence speed and dynamical model complexity. Such assessment is based on comparing the UKF
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
-
21. A HYBRID APPROACH FOR SIMULTANEOUS LOCALIZATION AND MAPPING WITH SONAR BASED ROBOTS AND EXTENDED KALMAN FILTER / UMA ABORDAGEM HÍBRIDA PARA LOCALIZAÇÃO E MAPEAMENTO SIMULTÂNEOS PARA ROBÔS MÓVEIS COM SONARES ATRAVÉS DE FILTRO DE KALMAN ESTENDIDO
Este trabalho aborda o problema da Localização e Mapeamento Simultâneos em ambientes estruturados, utilizando um robô móvel equipado com sonares, bússola eletrônica e encoders. Na modelagem sugerida há a construção do mapa do ambiente e a localização do robô de forma interativa. O método proposto, denominado de LMS-H (Localização e Mapeamento
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2012
-
22. System identification and active vibration control of a flexible structure
The aim of this paper is to illustrate the active control of vibration of a flexible structure using a model-based digital controller. The state-space model of the system is derived using a system identification technique known as the Observer/Kalman Filter Identification (OKID) method together with Eigensystem Realization Algorithm (ERA). Based on the measu
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
-
23. Failure prognosis methods and offline performance evaluation
The capability of predicting failure events of systems and components can provide benefits in equipment operation and maintenance. For this reason, the subject of failure prognosis is gaining greater attention from academia and industry over the last years. This work presents novel contributions related to the development and performance evaluation of failur
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/12/2011
-
24. Sistema de navegação inercial GPS/INS de baixo custo com compensação de erros por redes neurais artificiais / Low cost GPS/INS navigation systems with error compensation by artificial neural networks
Este trabalho aborda a aplicação de redes neurais artificiais (RNA) em um sistema de navegação inercial de baixo custo auxiliado por GPS. Busca-se suprir a necessidade que ocorre já que o GPS não trabalha em todos os ambientes, ou pode trabalhar de forma inadequada, durante certo intervalo de tempo. Desenvolve-se solução para prover a falta de inform
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/12/2011