Gyroscopes
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Gait variability and symmetry assessment with inertial sensors for quantitative discrimination of Trendelenburg sign in total hip arthroplasty patients: a pilot study based on convenience sampling
Abstract Introduction The aim of this pilot study based on convenience sampling was to analyze the feasibility to quantitatively discriminate Trendelenburg sign (TS), a characteristic drop in pelvic position during gait in hip disfunctions, in patients with total hip arthroplasty (THA), by assessing gait variability and symmetry using inertial sensors. Me
Res. Biomed. Eng.. Publicado em: 19/03/2018
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2. 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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3. 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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4. Study and compensation of bias drift, scale factor stability and linearity of a conditioning and sign processing circuit of an interferometric fiber optic gyroscope / Estudo e compensação da deriva termica, estabilidade do fator de escala e lineariazação de um circuito de condicionamento e processamento de sinais de girometro interferometrico a fibra optica
Fiber Optic gyroscopes are an important part of inertial navigation systems. To meet the necessary specifications required for application in inertial systems, it is mandatory that the electronic Sagnac demodulator uses state of the art devices. The proposal of this work is to study and develop a technique to correct all together for the nonlinearities, the
Publicado em: 2009
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5. The study and design of an electronic system for signal processing of fiber optic gyroscopes with a dynamic modulation / Estudo e projeto de um sistema eletronico de processamento de sinais de girometros a fibra optica com modulação dinamica
Esta tese apresenta o estudo e o projeto de um processador eletrônico do sinal de um interferômetro de Sagnac a fibra óptica que procura atender especificações para aplicação em navegação inercial. Estudou-se o comportamento de Girômetros a fibra óptica com modulação de fase senoidal através de modelos e simulações de algumas técnicas de pro
Publicado em: 2009
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6. Navegação através de um sistema integrado GPS/INS baseado em IMU não-giroscópica / Integrated GPS/INS navigation system based on gyroscope free IMU
The present work has the objective of analyzing the performance of a low cost strapdown inertial navigation system (INS), based on a gyroscope free inertial measurement unit (IMU) that only uses multiples accelerometers and is aided by a GPS receptor data. The availability of low cost, size and weight accelerometers with medium performance and more robustnes
Publicado em: 2005
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7. A METHODOLOGY TO ESTABILISH THE METROLOGICAL RELIABILITY OF INERTIAL SYSTEMS WHEN SUBMITTED TO A DINAMIC PROFILE APPLIED / METODOLOGIA PARA DETERMINAÇÃO DA CONFIABILIDADE METROLÓGICA DE SISTEMAS INERCIAIS SOB UM PERFIL DINÂMICO APLICADO
O desempenho de sistemas inerciais de navegação ou de indicação de rumo e atitude é fortemente ligado à qualidade metrológica dos sensores inerciais, acelerômetros e giroscópios, que compõem esses sistemas. É proposta uma metodologia para calibração e cálculo de incertezas de acelerômetros pendulares servo controlados do tipo Q-flex e de giros
Publicado em: 2005
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8. Nova tecnica de processamento de sinais no dominio do tempo de giroscopios interferometricos de Sagnac a fibra optica
This work focuses on the study of a new time domain signal processing technique of Sagnac interferometric fiber optic gyroscopes. The technique consists in demodulating the output signal of the interferometer to obtain the rotation rate W and to monitor both the optical phase modulation depth m f and the incident power level 0 P , by measuring the dc value a
Publicado em: 2001
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9. Crystalline molecular machines: Encoding supramolecular dynamics into molecular structure
Crystalline molecular machines represent an exciting new branch of crystal engineering and materials science with important implications to nanotechnology. Crystalline molecular machines are crystals built with molecules that are structurally programmed to respond collectively to mechanic, electric, magnetic, or photonic stimuli to fulfill specific functions
National Academy of Sciences.