Disturbance Rejection
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. ADVANCED CONTROL OF A COMPLEX CHEMICAL PROCESS
Abstract Three phase catalytic hydrogenation reactors are important reactors with complex behavior due to the interaction among gas, solid and liquid phases with the kinetic, mass and heat transfer mechanisms. A nonlinear distributed parameter model was developed based on mass and energy conservation principles. It consists of balance equations for the gas a
Braz. J. Chem. Eng.. Publicado em: 2016-03
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2. CONTROLE DE VELOCIDADE SENSORLESS DE MOTORES BRUSHLESS DC SUBMETIDOS A VARIAC~OES PERIODICAS DE CARGA / SENSORLESS SPEED CONTROL OF BRUSHLESS DC SUBJECTED TO PERIODIC LOAD TORQUE
Esta dissertac~ao apresenta um sistema de acionamento e controle de velocidade sensorless para motores Brushless DC utilizados em compressores alternativos. Estes compressores provocam variac~oes periodicas de carga sobre o motor causando vibrac~oes mec^anicas e rudo acustico. Em vista disso, um controlador discreto de velocidade baseado no princpio do model
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/07/2011
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3. µ-synthesis for unmanned underwater vehicles current disturbance rejection
This note focuses attention on a novel approach to disturbance rejection when the µ-synthesis control procedure is applied to Unmanned Underwater Vehicles (UUVs). Environmental external disturbances simplify to ocean current for a totally submerged vehicle and greatly contributes for hydrodynamical loads and the tether cable disturbance. Our case scenario d
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
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4. Control of integrating process with dead time using auto-tuning approach
A modification of Smith predictor for controlling higher order processes with integral action and long dead-time is proposed in this paper. The controller used in this Smith predictor is an Integral-Proportional Derivative controller, where the Integrator is in the forward path and the Proportional and Derivative control are in the feedback, acting on the fe
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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5. A best practices method for aircraft flight control law design.
This work develops a systematic design procedure for flight control laws design which allows: the use of best practices; compatibility with current fly-by-wire implementation; and integration with aircraft and systems design. Such procedure is based on a two-degree-of-freedom control structure, the first degree of freedom defining input to output characteris
Publicado em: 2008
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6. Design of an automatic landing system using linear quadratic tracker.
This work presents the application of the Linear Quadratic Tracker (LQT) for the automatic landing system of passenger transport airplanes. The design method to achieve an autoland flare law with improved performance and disturbance rejection is described. With this method the design is direct and more formal thus avoiding the somewhat time consuming and mor
Publicado em: 2008
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7. Impacto do trauma e dissociaÃÃo da consciÃncia na personalidade mÃltipla : um estudo de caso
This research investigates the traumatic and dissociative impact on a patient diagnosed with the Multiple Personality Disturbance, a mental disorder of difficult diagnosis due to the diversified symptomatology and to its strong comorbidity. For this dissociative disturbance â currently classified as Dissociative Identity Disorder, previously denominated Mul
Publicado em: 2007
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8. Robust pole placement and stability analysis of interval systems with data dependencies / Alocação de polos e estabilidade robustas de sistemas intervalares com tratamento de multiincidencias de parametros
This Dissertation is focused on control system design and stability analysis of linear timeinvariant uncertain plants, with uncertainties of interval nature. The control system design problem is treated in the context of the pole placement technique. An extension of the classical technique to robust pole placement based on Interval Analysis is proposed. The
Publicado em: 2006
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9. Reliable disturbance rejection
Este artigo estuda o problema da confiabilidade - com falhas de sensores e atuadores - da rejeição assintótica de distúrbios em sistemas lineares multivariáveis invariantes no tempo usando o método da fatoração das matrizes de transferência. Supõe-se que não ocorram falhas simultâneas de todas as malhas de realimentação e que não haja falha si
Sba: Controle & Automação Sociedade Brasileira de Automatica. Publicado em: 2005-03
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10. Model predictive disturbance rejection during cooperative mobile robot assembly tasks
This paper addresses the problem of disturbance compensation for the successful assembly of structures by mobile field robots. A control architecture, consisting of a linear PID joint controller with model predictive feed-forward compensation for mobile base motions and interactive-force disturbance rejection is discussed. Object insertion is achieved by pre
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-09
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11. Estudos sobre estimadores de riqueza de especies, perturbações experimentais e persistencia ao longo de cinco anos em comunidades de macroinvertebrados bentonicos em riachos
In this thesis I address topics of species richness estimation and the role of disturbance in streams. In an evaluation of species richness estimators, alI methods were dependent on sample size. Such dependence is in part due to the non-stabilization of the curve of accumulation of rare species. The results indicate that estimates of species richness in an a
Publicado em: 2002
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12. A simulation benchmark to evaluate the performance of advanced control techniques in biological wastewater treatment plants
Wastewater treatment plants (WWTP) are complex systems that incorporate a large number of biological, physicochemical and biochemical processes. They are large and nonlinear systems subject to great disturbances in incoming loads. The primary goal of a WWTP is to reduce pollutants and the second goal is disturbance rejection, in order to obtain good effluent
Brazilian Journal of Chemical Engineering. Publicado em: 2001-03