Ney Rafael Secco

Ney Rafael Secco
Instituto Tecnologico de Aeronautica · Departamento de Projetos

Professor

About

22
Publications
11,275
Reads
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327
Citations
Citations since 2016
16 Research Items
320 Citations
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2016201720182019202020212022020406080
2016201720182019202020212022020406080

Publications

Publications (22)
Article
Purpose This paper aims to investigate the possibility of lowering the time taken during the aircraft design for unmanned aerial vehicles by using machine learning (ML) for the configuration selection phase. In this work, a database of unmanned aircraft is compiled and is proposed that decision tree classifiers (DTC) can understand the relations be...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2021-2498.vid Propellers are one of the most efficient ways to generate propulsion for low-speed flights. About 84\% of the energy generated by the engines is utilized, being therefore widely used in several different aircraft. However, studies show that propellers with a diameter less than 16 inch...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2021-2732.vid This paper examines aerodynamic shape optimization considering the two-dimensional Euler equations and adaptive unstructured meshes. In this work, the adaptive process uses primal and adjoint solutions to estimate the error in functional outputs and to formulate adaptive indicators to...
Conference Paper
One critical step of conceptual design of future aircraft is the selection of technologies to be integrated in the system. This paper presents a framework under development to support the selection and prioritization of technologies in the presence of uncertainty for future Aerospace & Defense programs. The work is a product of a collaboration betw...
Conference Paper
Uncertainty-based Design Optimization techniques present a powerful toolkit to achieve robust and reliable optimal designs in the presence of uncertainty, having probability theory as its backbone. The central limit theorem is a key concept in probability theory due to its notorious usefulness in a wide number of statistical problems. However, it s...
Article
This paper presents a framework to support decision-making in aircraft conceptual design optimisation under uncertainty. Emphasis is given to graphical visualisation methods capable of providing holistic yet intuitive relationships between design, objectives, feasibility and uncertainty spaces. Two concepts are introduced to allow interactive explo...
Article
Full-text available
Mesh generation and deformation are critical elements in gradient-based aerodynamic shape optimization (ASO). Improperly generated or deformed meshes may contain bad-quality cells that degrade the accuracy of computational fluid dynamics (CFD) solvers. Moreover, an inefficient mesh deformation method can become the bottleneck for the entire ASO pro...
Article
Full-text available
The strut-braced wing aircraft configuration promises to reduce fuel burn by enabling higher spans that reduce lift-induced drag. A successful design for this configuration depends on a careful trade-off between the various sources of drag and structural weight. When using computational fluid dynamic tools for aerodynamic shape optimization, genera...
Article
Full-text available
Mesh generation for high-fidelity computational fluid dynamics simulations and aerodynamic shape optimization is a time-consuming task. Complex geometries can be accurately modeled using overset meshes, whereby multiple high-quality structured meshes corresponding to different aircraft components overlap to model the full aircraft configuration. Ho...
Thesis
Advances in computational power allow the increase in the fidelity level of analysis tools used in conceptual aircraft design and optimization. These tools not only give more accurate assessments of aircraft efficiency, but also provide insights to improve the performance of next-generation aircraft. Aerodynamic shape optimization involves the incl...
Article
Purpose Multidisciplinary design frameworks elaborated for aeronautical applications require considerable computational power that grows enormously with the utilization of higher fidelity tools to model aeronautical disciplines like aerodynamics, loads, flight dynamics, performance, structural analysis and others. Surrogate models are a good altern...
Conference Paper
Full-text available
Structured mesh computational fluid dynamic solvers are inherently faster than unstructured solvers, which is particularly advantageous for aerodynamic design optimization, where hundreds of flow solutions are required. However, generating body-fitted multiblock meshes for complex geometries is challenging and is a time consuming task. The overset mes...
Article
Full-text available
http://dx.doi.org/10.5028/jatm.v5i4.254 The present work is concerned with the accurate modeling of transport airplanes. This is important for minimizing associated development risks of airplanes and because multi-disciplinary design and optimization (MDO) frameworks require an accurate airplane modeling to carry out realistic optimization tasks....
Conference Paper
Full-text available
In this paper is detailed a linear LQR control technique, when applied the specific weighting algorithm. This is done as a preamble to the implementation of gain schedule technique, already established in the industry. Latter, the nonlinear backstepping technique is presented; its characteristics and design methodology are highlighted, looking its...
Article
Full-text available
http://dx.doi.org/10.5028/jatm.v5i3.223 This paper describes a multi-disciplinary design and optimization framework tailored for the conceptual development of high-altitude solar-powered unmanned aerial vehicles. The aircraft baseline configuration that the framework is able to handle is very similar to that of Zephyr, which is developed by the UK...

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