Linear Matrix Inequality
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Research of the Photoelectric Tracking and Pointing Platform Based on the Servo Control System
ABSTRACT: To improve the speed and accuracy of the photoelectric tracking and pointing platform stable tracking, we took the three-axis photoelectric tracking platform, of which the coupling among the rings is ignored, as the research object. Considering the effects of various disturbances, the stable tracking double closed-loop servo control system was buil
J. Aerosp. Technol. Manag.. Publicado em: 18/03/2019
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2. The Control of Asymmetric Rolling Missiles Based on Improved Trajectory Linearization Control Method
ABSTRACT According to motion characteristic of an asymmetric rolling missile with damage fin, a three-channel controlled model is established. The controller which is used to realize non-linear tracking and decoupling control of the roll and angle motion is introduced based on an improved trajectory linearization control method. The improved method is compos
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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3. Antiwindup design with guaranteed regions of stability : an LMI-based approach
This note addresses the design of antiwindup gains for obtaining larger regions of stability for linear systems with saturating inputs. Considering that a linear dynamic output feedback has been designed to stabilize the linear system (without saturation), a method is proposed for designing an antiwindup gain that maximizes an estimate of the basin of attrac
Publicado em: 2011
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4. Stability analysis and stabilization of systems presenting nested saturations
This note addresses the problems of stability analysis and stabilization of systems presenting nested saturations. Depending on the open-loop stability assumption, the global stability analysis and stabilization problems are considered. In the (local) analysis problem, the objective is the determination of estimates of the basin of attraction of the system.
Publicado em: 2011
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5. 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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6. Synthesis of Controllers for Continuous-Time Delay Systems with Saturating Controls via LMI's
The stabilization of linear continuous-time systems with time delay in the state and subject to saturating controls is addressed. Sufficient conditions obtained via a linear matrix inequality (LMI) formulation are stated to guarantee both the local stabilization and the satisfaction of some performance requirements. The method of synthesis consists in determ
Publicado em: 2011
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7. Design of controllers to damp oscillations in electrical systems with distributed generation / Projeto de controladores para o amortecimento de oscilações em sistemas elétricos com geração distribuída
Essa pesquisa se propõe a investigar o uso de Inclusões Diferenciais Lineares Limitadas por Norma (IDLNs) para projeto de controladores de amortecimento de tipo PSS (Power System Stabilizer) para sistemas elétricos com a presença de geração distribuída. Uma vez definida de maneira adequada, uma IDLN pode ser capaz de englobar um conjunto de trajetóri
Publicado em: 2010
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8. Projeto de leis de controle robusto do tipo PSC via realimentação de estados aplicada a um sistema UPS
Esta dissertação apresenta o desenvolvimento e a implementação de uma estratégia alternativa para o controle da tensão de saída em Fontes Ininterruptas de Energia (também chamadas de UPS - Uninterruptible Power Supply). Esta estratégia é denominada Controlador Proporcional, Senoidal e Cossenoidal (PSC). Os ganhos deste controlador são obtidos atra
Publicado em: 2009
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9. ANÁLISE E CONTROLE DE GERADOR SÍNCRONO A ÍMÃ PERMANENTE APLICADO A SISTEMA DE CONVERSÃO DE ENERGIA EÓLICA / ANALYSIS AND CONTROL OF PERMANENT MAGNET SYNCHRONOUS GENERATOR APPLIED TO WIND ENERGY CONVERSION SYSTEM
This dissertation addresses the analysis and control of permanent magnet synchronous generators (PMSG) found in wind energy conversion system. The operation modes of the wind turbine the current and voltage constraints of a PWM rectifier are defined and a methodology to determine the generator current is presented. The generator currents obtained guarantee t
Publicado em: 2009
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10. Síntese de controladores robustos H2/H[infinito] D- estáveis via algoritmos evolutivos : uma abordagem LMI
This work is concerned with the mixed H2/H1 robust control problem combined with robust D−stability in linear matrix inequality (LMI) regions. Continuous-time linear systems subject to polytopic parametric uncertainties are studied. Based on Evolutionary Algorithms and LMIs, an hybrid algorithm is presented for numerical computation of a robust fixed-o
Publicado em: 2006
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11. Estabilidade e controle de sistemas lineares variantes no tempo e de sistemas chaveados lineares
This thesis presents contributions to the solution of problems of stability analysis and control synthesis applied to linear systems with time-varying parameters belonging to a polytope and to switched linear systems subject to arbitrary switching functions using linear matrix inequality conditions based on Lyapunov functions. Concerning linear time-varying
Publicado em: 2005
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12. Robust predictive control of a gasoline debutanizer column
This paper studies the application of Model Predictive Control to moderately nonlinear processes. The system used in this work is an industrial gasoline debutanizer column. The paper presents two new formulations of MPC: MMPC (Multi-Model Predictive Controller) and RSMPC (Robust Stable MPC). The approach is based on the concepts of Linear Matrix Inequalities
Brazilian Journal of Chemical Engineering. Publicado em: 2000-12