Reaction Wheel
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Sorbent system based on acetylated microfibrillated cellulose for remediation of oil aquatic environments
ABSTRACT The growth of oil exploration and transport in marine environments brings concern over potential environmental disasters caused by oil spills. Thus, various materials are being developed and studied in order to minimize environmental impacts caused by these oil spills. Among these materials, the use of sorbents has appeared as a great potential tech
Matéria (Rio J.). Publicado em: 10/06/2019
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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. Voluntary exercise prior to traumatic brain injury alters miRNA expression in the injured mouse cerebral cortex
MicroRNAs (miRNAs) may be important mediators of the profound molecular and cellular changes that occur after traumatic brain injury (TBI). However, the changes and possible roles of miRNAs induced by voluntary exercise prior to TBI are still not known. In this report, the microarray method was used to demonstrate alterations in miRNA expression levels in th
Braz J Med Biol Res. Publicado em: 06/03/2015
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4. POSITION CONTROL OF AN IN-PLANE PENDULUM USING REACTION WHEELS / CONTROLE DE POSIÇÃO DE UM PÊNDULO PLANAR USANDO RODAS DE REAÇÃO
Esse trabalho apresenta o estudo, manipulação e controle de um sistema de 2 graus de liberdade conhecido como pêndulo planar usando rodas de reação para alcançar certa posição, sendo o conceito básico desse sistema fundamentado na dinâmica de um pêndulo invertido. Utilizou-se o controle clássico PID e também controle Fuzzy, sendo gerado um model
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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5. Controles monovariáveis e multivariáveis aplicados a sistemas aeroespaciais fracamente ou fortemente acoplados / Monovariable and multivariable controls applied to weakly or strongly coupled aerospace systems
This work intends to study and compare two Classical (Single Input Single Output) Control design methods and three Modern (Multiple Input Multiple Output) Control design methods applied to weakly or heavily coupled aerospace systems. This work has as first application the Multi-Mission Platform - MMP currently under development at INPE. The models are develo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2006
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6. Analysis of emergency braking performance with particular consideration of temperature effects on brakes
During vehicle deceleration due to braking there is friction between the lining surface and the brake drum or disc. In this process the kinetic energy of vehicle is turned into thermal energy that raises temperature of the components. The heating of the brake system in the course of braking is a great problem, because besides damaging the system, it may also
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
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7. Um metodo de analise e especificacao de sistmas com requisitos de desempenho, custo e confiabilidade, aplicado a rodas de reacao / A method for systems analysis and specification with performance, cost and reliability requirements apllied to the design of a reaction wheel
No passado, as atividades de projeto na area espacial enfatizavam sobremaneira os requisitos de um sistema. Os metodos empregados baseavam-se principalmente em aspectos funcionais. Recentemente, estas abordagens foram questionadas por desprezarem os custos envolvidos, que eram estimados na etapa final de concepcao. Por isto, novos metodos foram propostos par
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/10/1999
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8. Um metodo de analise e especificacao de sistmas com requisitos de desempenho, custo e confiabilidade, aplicado a rodas de reacao / A method for systems analysis and specification with performance, cost and reliability requirements apllied to the design of a reaction wheel
In the past, space design activities commonly emphasized mainly the system requirements. The available methods focused on functional aspects only. The cost was estimated at the end of the process. Recently, new design methodologies have been proposed. Among them, the design-to-cost (DTC) method was developed to include the cost as a parameter. In this work,
Publicado em: 1999
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9. A method for systems analysis and specification with performance, cost and reliability requirements apllied to the design of a reaction wheel / Um metodo de analise e especificacao de sistmas com requisitos de desempenho, custo e confiabilidade, aplicado a rodas de reacao
No passado, as atividades de projeto na area espacial enfatizavam sobremaneira os requisitos de um sistema. Os metodos empregados baseavam-se principalmente em aspectos funcionais. Recentemente, estas abordagens foram questionadas por desprezarem os custos envolvidos, que eram estimados na etapa final de concepcao. Por isto, novos metodos foram propostos par
Publicado em: 1999
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10. The turning wheel: a study in steady states.
Subject to the limitation of one-step transitions, a system composed of a polyfunctional macromolecule (say a polyfunctional enzyme), present in fixed amount together with its ligands (substrates) in a fixed volume, can be represented by an r-dimensional cube of which each of the 2r corners corresponds to one of the microscopically different forms. In the st