PUBLISHED PAPERS
2023 |
Abordagens de Modelagem Estatística e Aprendizado de Máquina para a Predição da Transmitância Atmosférica Proceedings Article José Rodrigues de Carvalho Neto; Mauri Apacerido de Oliveira; Caio Augusto Melo Silvestre Resumo | Links | BibTeX | Tags: AO - Flight Safety; AO - Pesquisa Operacional @inproceedings{235061,Diante da crescente complexidade dos equipamentos militares, especialmente sistemas Infra-Red Search and Track (IRST), a FAB envidou esforços para desenvolver ferramentas para estimar o alcance desse tipo de sistema. Para tal, a transmitância atmosférica, inicialmente calculada pelo software MODTRAN, é essencial. Porém, o MODTRAN tem alta demanda computacional, comprometendo a agilidade das decisões. Assim, buscou-se criar um modelo matemático queprevisse a transmitância de maneira mais rápida e econômica, utilizando dados do MODTRAN, especificamente na banda larga do espectro infravermelho. Inicialmente, a Regressão Linear Múltipla (RLM) foi testada, mas apresentou limitações. A regressão beta, apesar de limitar os valores entre 0 e 1, mostrou predição insatisfatória. O modelo Random Forest de aprendizagem de máquina apresentou excelentes resultados numa base de dados específica, porém, numa base com valores ligeiramente diferentes, a precisão caiu, revelando suas limitações. |
Analysis of Computer Vision Application in The Context of SAR Missions Proceedings Article João custódio de Faria Filho Resumo | Links | BibTeX | Tags: AO - Flight Safety; AO - Pesquisa Operacional @inproceedings{235122,This work includes a general feasibility and performance analysis of some image classification models for Search And Rescue (SAR) operations. Since SAR missions are typically high-wear and high-risk situations for both the victims and theSAR crew, some teams around the globe have been seeking to use technology to speed up rescues and reduce damages. The Croatian Mountain Rescue Service (CMRS) and other SAR teams have been using Unmanned Aerial Systems (UAS) to obtain bird’s eye captures of the search area, contrasting with typical low-altitude manned flies. This paper uses the HERIDAL dataset images to train, validate, and test models. We used two different neural network architectures and eight different training parameters. Accuracy above 98% was achieved, but it doesn’t necessarily mean that the models are ppropriate for real-life use, so several considerations were made. |
Enhancing Spaceworthiness Process Based on Certification Procedures Applied in KC-390 and Gripen F-39 Proceedings Article Daniel Rondon Pleffken; Daniele Clarindo; Guilherme Moreira; Christopher Shneider Cerqueira Resumo | Links | BibTeX | Tags: AO - Flight Safety; AO - Pesquisa Operacional @inproceedings{235490,This work contextualizes military airworthiness certification and its importance for aerospace products. Additionally, it summarizes the military aircraft Type Certification process applied to the KC-390 and F-39 projects,listing good practices for the proposition of application in thespace context. For this, the work: 1) reviews and analyzes thenational and international context and identifies Sweden andBrazilian military certification processes; 2) Presents the spaceworthiness process used in Brazil; and 3) Compares processes present and validates suggestions for improvement. Atthe end of the work, it was possible to understand the processesand their standards and present some activities and examples of their application in paceworthiness. In addition, the practices adopted can serve as an example for other industries andapplications. |
2022 |
Methodology for evaluation of pilot´s performance on helicopter firing-rocket from flight data Proceedings Article Raphael Cortes; Emilia Villani; Luiz Damy Resumo | Links | BibTeX | Tags: AO - Flight Safety; AO - Pesquisa Operacional @inproceedings{226280,Rocket air-to-ground shot is usually evaluated in a fixed ground facility, where is estimated ground impact point. A methodology was proposed to assess the pilot's performance on the ramp, and low-level helicopter shot maneuvers using flight data, an eye tracker device, two degrees of freedom rocket model, and the rotor downwash modeled based on momentum and blade element theory. Results have shown an estimation of the impact point lower than six meters and coherent performance metrics when comparing ramp and low-level maneuvers. |