Linear Quadratic Control
Mostrando 25-36 de 84 artigos, teses e dissertações.
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25. Poultry viscera and bone meal in broiler pre-starter and starter diets
The use of viscera and bone meal in poultry pre-starter and starter diets and its effects on performance, digestive organ development and digestibility and nutrient retention were evaluated. In the first assay, 280-day-old Avian Cobb® chicks were allotted in four experimental groups with five replicates of 14 birds each, in the pre-starter phase; in the sec
Revista Brasileira de Zootecnia. Publicado em: 2012-04
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26. Attitude Control of a Satellite by Using Digital Signal Processing
Abstract: This article has discussed the development of a three-axis attitude digital controller for an artificial satellite using a digital signal processor. The main motivation of this study is the attitude control system of the satellite Multi-Mission Platform, developed by the Brazilian National Institute for Space Research for application in different s
J. Aerosp. Technol. Manag.. Publicado em: 2012-03
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27. Growth and regrowth of tough lovegrass (Eragrostis plana Nees)
This study evaluated the morphological development of two populations of tough lovegrass during 120 days of continuous growth (Experiment I), and the regrowth of one population under the combination of cutting height (5 cm and 10 cm) and phenological stage at the first cutting (vegetative and beginning of flowering; Experiment II). In Experiment I, plants we
Revista Brasileira de Zootecnia. Publicado em: 2012-02
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28. Bézier control points method to solve constrained quadratic optimal control of time varying linear systems
A computational method based on Bézier control points is presented to solve optimal control problems governed by time varying linear dynamical systems subject to terminal state equality constraints and state inequality constraints. The method approximates each of the system state variables and each of the control variables by a Bézier curve of unknown cont
Comput. Appl. Math.. Publicado em: 2012
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29. 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
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30. 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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31. Metodologia para a alocação ótima discreta de sensores e atuadores piezoelétricos na simulação do controle de vibrações em estruturas de materiais compósitos laminados
O principal objetivo do controle de vibrações é a sua redução ou minimização, através da modificação automática da resposta estrutural. Em muitas situações isto é necessário para promover a estabilidade estrutural, e para alcançar o alto desempenho mecânico necessário em diversas áreas técnicas, tais como a engenharia aeroespacial, civil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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32. Níveis de suplementação para fêmeas bovinas de corte em pastejo / Levels of supplementation for grazing beef cattle female
This thesis was developed from four experiments with crossbred female with predominance of Zebu breed exposed to different levels of supply multiple supplementation on pasture. The objective of first experiment was to evaluate the effect of providing different levels of multiple supplement on the nutritional characteristics and productive performance of heif
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2011
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33. Uma nova metodologia de jogos dinÃmicos lineares quadrÃticos / A new methodology for linear quadratic dynamic games
A teoria dos jogos à um ramo da matemÃtica dedicado ao estudo de situaÃÃes que surgem quando mÃltiplos agentes de decisÃo buscam atingir seus objetivos individuais, possivelmente conflitantes entre si. Em sua formulaÃÃo dinÃmica linear quadrÃtica (LQ), as soluÃÃes de equilÃbrio de Nash dos jogadores podem ser obtidas em termos das equaÃÃes alg
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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34. Solving of time varying quadratic optimal control problems by using Bézier control points
In this paper, linear quadratic optial control probles are solved by applying least square method based on Bézier control points. We divide the interval which includes t, into k subintervals and approximate the trajectory and control functions by Bézier curves. We have chosen the Bézier curves as piacewise polynomials of degree three, and determined Bézi
Computational & Applied Mathematics. Publicado em: 2011
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35. Local stabilization of linear systems under amplitude and rate saturating actuators
This note addresses the problem of local stabilization of linear systems subject to control amplitude and rate saturation. Considering the actuator represented by a first-order system subject to input and state saturation, a condition for the stabilization of an a priori given set of admissible initial states is formulated from certain saturation nonlinearit
Publicado em: 2011
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36. Initial values for Riccati ODEs from variational PDEs
The recently discovered variational PDEs (partial differential equations) for finding missing boundary conditions in Hamilton equations of optimal control are applied to the extended-space transformation of time-variant linear-quadratic regulator (LQR) problems. These problems become autonomous but with nonlinear dynamics and costs. The numerical solutions t
Computational & Applied Mathematics. Publicado em: 2011