Síntese de superfícies seletivas de frequência para micro-ondas utilizando otimização multiobjetivo bioinspirada

Abstract

The evolution of computing has made possible substantial advances in research related to engineering and industrial projects. In these areas, the use of computational tools has been intensified for simulation and obtaining certain parameters of the project. However, the growing demand for precision and the gradual increase of the complexity of the structures and systems, results in a simulation process increasingly time-consuming, because the evaluation of a single criterion can consume several hours, as well as several days or even weeks. Therefore, a method that maximizes the time of simulation and optimization, can thus save time and money. In this context, bioinspired computing (BIC), presents accurate and efficient, where many traditional computational methods fail and consists of new mechanism to address such difficulties. Thus, in this work, a study about some of the algorithms used today for BIC design and optimization of general problems in engineering and industry. From now on, one sees develop a metaheuristic optimization code to provide lower-cost computational multiobjective and, consequently, less time for data processing. Initially, an electromagnetic research of frequency selective surfaces with triangular patch elements is done by computer simulations. The numerical analysis is carried out using a full-wave technique based on finite integrals implemented on commercial software performed for simulations in electromagnetism. The synthesis process consists of tuning the resonant frequency of the structures and the bandwidth according to the objectives in the cost function optimization algorithms. The modeling of structures is performed by an artificial neural network and optimization process is performed by meta-heuristics algorithms. The results obtained by these codes are compared to simulated ones by commercial software and measured. A good agreement between simulated and measured results was obtained, as well as a substantial reduction in the processing time of the structures. Finally, conclusions and proposals for further works are presented.