Nonlinear Control Theory
Mostrando 1-12 de 45 artigos, teses e dissertações.
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1. Free vibration analysis of nano-tubes consisted of functionally graded bi-semi-tubes by a two-steps perturbation method
Abstract Free vibration of a bimaterial circular nano-tube is investigated. The tube is formed by bonding together a Si3N4/SUS304 functionally graded upper semi tube and a ZrO2/Ti-6Al-4V functionally graded lower semi tube. The material properties of the tube are assumed to vary along the radius according to power law with the power index of upper semi tube
Lat. Am. j. solids struct.. Publicado em: 04/02/2019
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2. Research on Sliding Mode Method about Three-Dimensional Integrated Guidance and Control for Air-to-Ground Missile
ABSTRACT Based on adaptive sliding mode-control and back-stepping design method, an integrated guidance and control method with less calculation is proposed, which is designed for air-to-ground missile during the terminal course in three-dimensional space. The model of the control system with nonlinear and coupling is simplified, then the integrated guidance
J. Aerosp. Technol. Manag.. Publicado em: 14/01/2019
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3. Robust Optimal Adaptive Trajectory Tracking Control of Quadrotor Helicopter
Abstract This paper focuses on robust optimal adaptive control strategy to deal with tracking problem of a quadrotor unmanned aerial vehicle (UAV) in presence of parametric uncertainties, actuator amplitude constraints, and unknown time-varying external disturbances. First, Lyapunov-based indirect adaptive controller optimized by particle swarm optimization
Lat. Am. j. solids struct.. Publicado em: 2017-06
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4. ROBUST CONTROL OF WIENER SYSTEMS: APPLICATION TO A pH NEUTRALIZATION PROCESS
Abstract In this paper, the robustness of a typical control scheme for Wiener systems is studied. These systems consist of the cascade connection of a linear time invariant system and a static nonlinearity. To control this kind of systems, several approaches were discussed in the literature. Most of these control schemes involve transformation of the measure
Braz. J. Chem. Eng.. Publicado em: 2016-03
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5. Global optimal path planning of an autonomous vehicle for overtaking a moving obstacle
In this paper, the global optimal path planning of an autonomous vehicle for overtaking a moving obstacle is proposed. In this study, the autonomous vehicle overtakes a moving vehicle by performing a double lane-change maneuver after detecting it in a proper distance ahead. The optimal path of vehicle for performing the lane-change maneuver is generated by a
Lat. Am. j. solids struct.. Publicado em: 2014
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6. Uma arquitetura híbrida aplicada em problemas de aprendizagem por reforço / A hybrid architecture to address reinforcement learning problems
With the evergrowing use of cognitive systems in various applications, it has been created a high expectation and a large demand for machines more and more autonomous, intelligent and creative in real world problem solving. In several cases, the challenges ask for high adaptive and learning capability. This work deals with the concepts of reinforcement learn
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/02/2012
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7. Numerical solution of the variational PDEs arising in optimal control theory
An iterative method based on Picard's approach to ODEs' initial-value problems is proposed to solve first-order quasilinear PDEs with matrix-valued unknowns, in particular, the recently discovered variational PDEs for the missing boundary values in Hamilton equations of optimal control. As illustrations the iterative numerical solutions are checked against t
Computational & Applied Mathematics. Publicado em: 2012
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8. Integração numérica de sistemas não lineares semi-implícitos via teoria de controle geométrico / Numerical integration of non-linear semi-implicit square systems via geometric control theory.
This work improves a method to approximate solutions for a class of differential algebraic equations (DAEs), known as systems semi-implicit square. The method, called here MII, is based on geometric theory of decoupling for nonlinear systems combined with efficient techniques numerical analysis. It uses an algorithum that mixes symbolic and numerical calcula
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/11/2011
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9. Modelagem matemática do comportamento dinâmico de uma célula a combustível tipo PEM e desenvolvimento de um sistema de controle em malha fechada para atendimento da demanda de potência para uso automotivo / Mathematical modeling of the dynamic behavior of a PEM fuel cell and development of a closed-loop control system for automotive applications
Este trabalho desenvolve um modelo computacional para simulação do comportamento de uma célula a combustível do tipo PEM. O modelo foi desenvolvido usando equações físico-químicas e ajuste de parâmetros baseados em resultados experimentais - os quais foram tirados da literatura, pois não foram conduzidos testes práticos em laboratório - sendo cap
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/10/2011
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10. Controlador nebuloso por modos deslizantes adaptativo
In this work, an Adaptive Sliding Neurofuzzy Controller was proposed and its parameters had been established and well characterized. In this way, some concepts of the theories of neurofuzzy networks, sliding mode control and adaptive control had been treated. The considered controller presents only three inference rules and a low computational effort. It was
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/08/2011
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11. Estimação algébrica aplicada aos sistemas de controle - um estudo de casos. / Algebraic estimation applied to control systems: a case study.
Esta proposta de dissertação de mestrado trata da aplicação de Estimadores Algébricos em sistemas de controle como alternativa ao uso de observadores. Devido à dificuldade de obtenção de resultados teóricos, dificuldade essa oriunda da natureza complexa dos estimadores algébricos, o trabalho é desenvolvido através do estudo de casos. Considera-se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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12. An adaptive fuzzy dead-zone compensation scheme and its application to electro-hydraulic systems
The dead-zone is one of the most common hard nonlinearities in industrial actuators and its presence may drastically compromise control systems stability and performance. Due to the possibility to express specialist knowledge in an algorithmic manner, fuzzy logic has been largely employed in the last decades to both control and identification of uncertain dy
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-03