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2024-10-22
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info:eu-repo/semantics/openAccess
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Universidad Nacional de Educación a Distancia (España), Universidad de Concepción - Chile. Departamento de Ingeniería Mecánica
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A exploração espacial é um dos principais motores da inovação e das novas tecnologias, especialmente a indústria aeroespacial. É por isso que as missões espaciais se tornam cada vez mais complexas, exigindo alta confiabilidade e menor custo dos seus subsistemas. Vale ressaltar que colocar um satélite no espaço é um procedimento de alto custo, envolvendo diversas etapas, onde o Sistema de Controle de Atitude (SCA) precisa ser robusto, confiável e ter bom desempenho. O SCA deve controlar altas velocidades angulares com grande precisão enquanto estabiliza a atitude em níveis compatíveis com os requisitos de apontamento da missão. Os subsistemas de um satélite associados aos seus sensores e atuadores que visam determinar e controlar a atitude do satélite, muitas vezes não podem ser reparados no espaço, pelo que o seu bom funcionamento é fundamental para o sucesso da missão. Por outro lado, missões espaciais complexas têm dinâmicas altamente não lineares, onde as técnicas de controle linear são incapazes de projetar o SCA que atenda aos requisitos da missão. Neste trabalho estudou-se o desempenho e a robustez da combinação das técnicas de controle SDRE (Equação de Riccati Dependente de Estado) e do controle H-Infinito (H∞). A primeira tem a grande vantagem de abordar sistemas com dinâmica não linear, através da parametrização do Coeficiente Dependente do Estado (SDC) e a segunda, é uma técnica que permite aumentar a robustez do controlador a perturbações temporárias e/ou persistentes e a incertezas do modelo. O desempenho e robustez do controlador projetado são investigados através da união das técnicas SDRE e H-Infinito para o controle de atitude do satélite Amazonia 1.
Space exploration is one of the main drivers of innovation and new technologies, particularly in the aerospace industry. Consequently, space missions are becoming increasingly complex, demanding high reliability and lower costs for their subsystems. It is worth noting that launching a satellite into space is a high-cost procedure involving various stages, where the Attitude Control System (ACS) must be robust, reliable, and high-performing. The ACS needs to control high angular velocities with great precision while stabilizing the attitude at levels compatible with the mission's pointing requirements. The satellite subsystems associated with its sensors and actuators, which aim to determine and control the satellite's attitude, often cannot be repaired in space, making their proper functioning crucial for mission success. On the other hand, complex space missions have highly nonlinear dynamics, where linear control techniques are unable to design the ACS to meet the mission requirements. In this work, study the performance and robustness of combining State-Dependent Riccati Equation (SDRE) techniques and H-Infinity (H∞) control. The former has the significant advantage of addressing systems with nonlinear dynamics through State-Dependent Coefficient (SDC) parameterization, while the latter is a technique that enhances the controller's robustness to temporary and/or persistent disturbances and model uncertainties. The performance and robustness of the designed controller are investigated through the combination of SDRE and H-Infinity techniques for the attitude control of the Amazonia-1 satellite.
Space exploration is one of the main drivers of innovation and new technologies, particularly in the aerospace industry. Consequently, space missions are becoming increasingly complex, demanding high reliability and lower costs for their subsystems. It is worth noting that launching a satellite into space is a high-cost procedure involving various stages, where the Attitude Control System (ACS) must be robust, reliable, and high-performing. The ACS needs to control high angular velocities with great precision while stabilizing the attitude at levels compatible with the mission's pointing requirements. The satellite subsystems associated with its sensors and actuators, which aim to determine and control the satellite's attitude, often cannot be repaired in space, making their proper functioning crucial for mission success. On the other hand, complex space missions have highly nonlinear dynamics, where linear control techniques are unable to design the ACS to meet the mission requirements. In this work, study the performance and robustness of combining State-Dependent Riccati Equation (SDRE) techniques and H-Infinity (H∞) control. The former has the significant advantage of addressing systems with nonlinear dynamics through State-Dependent Coefficient (SDC) parameterization, while the latter is a technique that enhances the controller's robustness to temporary and/or persistent disturbances and model uncertainties. The performance and robustness of the designed controller are investigated through the combination of SDRE and H-Infinity techniques for the attitude control of the Amazonia-1 satellite.
Descripción
Organizado y patrocinado por: Federación iberoamericana de Ingeniería Mecánica y Universidad de Concepción - Chile. Departamento de Mecánica, FeIbIm – FeIbEM
Categorías UNESCO
Palabras clave
SDRE, Controle H-Infinito, Controle de Atitude, Amazonia-1.SDRE, Controle H-Infinito, Controle de Atitude, Amazonia-1, SDRE, H-Infinity Control, Attitude Control, Amazonia-1
Citación
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Centro
E.T.S. de Ingenieros Industriales
Departamento
Mecánica