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Abstract(s)
Os veículos aéreos têm por sua caraterística uma dinâmica de voo não linear, mas observa-se que esta dinâmica pode ser aproximada de modo linear em torno de determinados pontos de referência, tendo em conta que os sistemas de controlo têm como garantia um bom funcionamento e um bom desempenho do sistema/modelo a ser aplicado. O conteúdo desta dissertação consiste na aplicação de novos métodos de estimação, através da simplificação de vários cálculos e de várias fórmulas, em que por sinal eram bastante extensas. Com a simplificação de algumas fórmulas aplicadas, foram concebidas algumas condições de voo distintas, com o objetivo de observar o comportamento da aeronave, e verificar a linearização do sistema. Com a continuação do processo, foi aplicada a estimação de parâmetros intervalares, de forma a garantir os requisitos de estabilidade robusta e obtendo um bom funcionamento de todas as derivadas de estado e de controlo. Um método fundamental na aplicação da estimação intervalar (Branch and Bound - BB) consistiu na minimização e na maximização das derivadas de estabilidade, garantindo que o seu fator de segurança seja apropriado e que cada derivada de estabilidade ou de estado varie dentro dos seus limites intervalares.
Os resultados robustos efetuados foram bastante aceitáveis e desta forma cumpriram todos os requisitos, satisfazendo o comportamento da aeronave.
The aircraft has for its characteristic dynamics nonlinear flight, but it is noted that this dynamic can be linearly approximated around certain landmarks, taking into account that the control systems are guaranteed a good run and a good systems performance/model to be applied. The content of this thesis was the application of new methods of estimation, through the simplification of various calculations and various formulas, in which by the way were quite extensive. With the simplifying some formulas applied, some distinct flight conditions were designed with the purpose of observing the behavior of the aircraft and verify linearization of the system. With the continuation of the process, has been applied to interval estimation of parameters in the order to insure the requirements of robust stability and obtaining a proper functioning of all derivatives of state and control. A key method in the application of interval estimation (Branch and Bound - BB) was the minimization and maximization of the derived stability, ensuring your safety factor is appropriate. By applying the data interval estimation, the flight envelope can be encompassed in those derived from stability. The robust results were made quite acceptable and thus fulfilled all the requirements, satisfying the behavior of the aircraft.
The aircraft has for its characteristic dynamics nonlinear flight, but it is noted that this dynamic can be linearly approximated around certain landmarks, taking into account that the control systems are guaranteed a good run and a good systems performance/model to be applied. The content of this thesis was the application of new methods of estimation, through the simplification of various calculations and various formulas, in which by the way were quite extensive. With the simplifying some formulas applied, some distinct flight conditions were designed with the purpose of observing the behavior of the aircraft and verify linearization of the system. With the continuation of the process, has been applied to interval estimation of parameters in the order to insure the requirements of robust stability and obtaining a proper functioning of all derivatives of state and control. A key method in the application of interval estimation (Branch and Bound - BB) was the minimization and maximization of the derived stability, ensuring your safety factor is appropriate. By applying the data interval estimation, the flight envelope can be encompassed in those derived from stability. The robust results were made quite acceptable and thus fulfilled all the requirements, satisfying the behavior of the aircraft.
Description
Keywords
Aproximação Não Linear. Controlo de Voo Derivadas de Estabilidade e de Estado Envelope de Voo Estimação Intervalar