Active Suspension
Mostrando 25-36 de 209 artigos, teses e dissertações.
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25. An optimal linear control design for nonlinear systems
This paper studies the linear feedback control strategies for nonlinear systems. Asymptotic stability of the closed-loop nonlinear system is guaranteed by means of a Lyapunov function, which can clearly be seen to be the solution of the Hamilton-Jacobi-Bellman equation thus guaranteeing both stability and optimality. The formulated Theorem expresses explicit
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-12
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26. Optimal design of passenger car suspension for ride and road holding
The primary function of a vehicle suspension system is to isolate the road excitations experienced by the tyres from being transmitted to the passengers. In this paper, a suitable optimizing technique is applied at design stage to obtain the suspension parameters of a passive suspension and active suspension for a passenger car which satisfies the performanc
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-03
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27. Desenvolvimento de um sistema de controle para suspensões ativas de elevadores de alto desempenho / Development of a controller for an active suspension system for high performance elevators
O presente trabalho aborda o desenvolvimento de um algoritmo de controle para um sistema de suspensão ativa para elevadores de alto desempenho. Esses dispositivos são muito usados no caso de suspensões veículos automotivos, mas não tanto em elevadores. Visando compreender os fenômenos envolvidos e executar testes do controle proposto através de simula
Publicado em: 2008
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28. Controle robusto de suspensão semi-ativa para caminhonetes utilizando amortecedores magneto-reológicos. / Robust control of a semi-active pickup truck suspension using magneto-rheological dampers.
A utilização de sistemas semi-ativos no controle de movimento e vibração vem crescendo muito nos últimos anos, e está se firmando como a opção mais econômica em muitas aplicações. Os sistemas de controle semi-ativos baseados em fluidos magneto-reológicos (MR) já são empregados no controle de vibrações desde máquinas de lavar a grandes pontes
Publicado em: 2008
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29. An effective device for generating alginate microcapsules
An alternative approach to somatic gene therapy is to deliver the therapeutic protein by implanting genetically modified cells that could overexpress the gene of interest. Microencapsulation devices were designed to protect cells from host rejection and prevent the foreign cells from spreading while allowing protein secretion. Alginate microcapsules form a s
Genetics and Molecular Biology. Publicado em: 2008
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30. Ruthenium nitrosyl compounds. Chemical equilibrium, involvement in vegetal systems and cytotoxicity in cancer / Nitrosilos complexos de rutênio. Equilíbrio químico, envolvimento em sistemas vegetais e citotoxicidade em modelos de câncer
The product of the reaction of trans-[Ru(NH3)4P(OEt) 3H2O]2+ with nitrite ions depends on the hydrogenionic concentration of the medium. In solutions with pH > 10, the final compound is the trans-[Ru(NH3)4P(OEt) 3NO2]+ (1,1 x 103 M-1.s-1), wich is quantitatively converted into the trans-[Ru(NH3)4P(OEt) 3NO]3+ in acid solutions (CH+ > 10-5 mol.L-1; kobs
Publicado em: 2008
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31. ANÁLISE DE MÚLTIPLAS VARIÁVEIS NO FECHAMENTO DE MINA ESTUDO DE CASO DA PILHA DE ESTÉRIL BF-4, MINA OSAMU UTSUMI, INB CALDAS, MINAS GERAIS.
The Osamu Utsumi belongs to Indústrias Nucleares do Brasil (INB), located in Caldas/MG, operated from 1982 to 1995, when the complete suspension of mining activities a processing of the uranium ore took place. Since then, the mine has an active maintaining system, which focus is the treatment of the acid drainage from the pit, waste dumps (locally called bo
Publicado em: 2007
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32. Avaliação da atividade micobactericida de desinfetantes químicos utilizando a técnica de cultivo em camada de ágar Middlebrook 7H11 / Evaluation of mycobactericidal activity of chemical disinfectants using the Middlebrook 7H11 agar medium technique
The mycobactericidal activity of five chemical disinfectants was evaluated against a strain of Mycobacterium bovis isolated from a goat, typified by PCR (polymerase chain reaction) and with 32 days of growth in the Stonebrink medium. The disinfectants were tested using the modified thin layer Middlebrook 7H11 cultivation technique and it was compared to the
Publicado em: 2007
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33. Modification and immobilization of TiO2 aiming the degradation of organic pollutant compounds by heterogeneous photocatalysis process / Modificação e imobilização de TiO2 visando a degradação de compostos orgânicos poluentes via o processo de fotocatálise heterogênea
The main goal of this work was to find alternatives capable to promote an improvement in terms of applicability of the heterogeneous photocatalysis process, in order to make it feasible in large scale. The use of the photocatalyst TiO2 immobilized and also modificated with adsorbent materials was evaluated. The heterogeneous photocatalysis process, either us
Publicado em: 2007
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34. Skyhook control of a hydropneumatic suspension system developed for use in agricultural farm wagons / Controle Skyhook aplicado a um modelo de suspensão hidropneumatica para carretas agricolas
This study deals with the development of a control system suited for a Hydropneumatic Suspension System designed for use in Agricultural Devices. Using the Skyhook Control methodology, two control systems are designed for a quarter car non-linear model, an active and a semi-active one. For performance measurement, two kinds of road excitation sources are con
Publicado em: 2006
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35. Desenvolvimento da forma farmacÃutica suspensÃo à base de benznidazol para utilizaÃÃo no tratamento da doenÃa de chagas
Chagasâ Disease or American trypanosomiasis is an endemic disease and exclusive ne-glectfulness of the American continent, mainly Central America and South America. Estimates allege that between 16 and 18 million people are infected by Trypanosoma cruzi. Benznidazol is currently the chemotherapeutically active ingredient against T. cruzi. Until 2003, benzni
Publicado em: 2006
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36. Jau at stake : social changes end environmental conservation in Parque Nacional do Jau (AM) / Jau em jogos : mudanças sociais e conservação ambiental no Parque Nacional do Jau (AM)
The establishment of restrictive environmental areas figures as one of the main instruments of environmental conservation in the country. Beginning with the fact that the majority of integrally protected areas in Brazil is inhabited, we seek to reveal the processes of social change in course in these areas, based on the study of a specific integrally protect
Publicado em: 2006