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Multiobjective optimization of a staggered-rotor octocopter design based on a surrogate model

机译:Multiobjective optimization of a staggered-rotor octocopter design based on a surrogate model

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摘要

When designing a novel double-layer staggered-rotor octocopter with improved aerodynamic performance, the aerodynamic performance and structural parameters will have a complex coupling relationship that should be considered in the overall design process. A surrogate-model-based multiobjective optimization method is proposed in this study to optimize novel octocopter structural design schemes considering total thrust, the weight of the propeller and fuselage, the storage volume, and the fuselage volume. This approximation and optimization approach effectively reduces the cost of a large amount of computational fluid dynamics (CFD) calculations in octocopter design and provides a global prediction of octocopter performance. According to the verified optimal solution through CFD simulation, we can see that the surrogate model offers excellent predictive ability, and the prediction accuracy of thrust exceeds 95%. Compared with the initial optimum data, the optimal solution calculated from the optimization could generate 76.74% more thrust, the objective function y is improved by 11.48%, and the objective function a is improved by 322.06%. These results show that the aerodynamic/structural parameter optimization design method considering the influence of aerodynamic interference for multirotor aircraft proposed in this paper is feasible and exhibits good performance. The methodology proposed in this work could provide guidelines for structural parameter design optimization for double-deck multiple-rotor aircraft design at the preliminary design stage, as well as copter structural design considering multiple-rotor interference effects.

著录项

  • 来源
    《Aerospace science and technology》 |2023年第8期|568-581|共14页
  • 作者单位

    National Key Laboratory of Rotorcraft Dynamics, Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

    State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

    State Key Laboratory of Mechanics and Control for Aerospace Structures, Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类
  • 关键词

    Multiobjective optimization; Configuration; Octocopter design; Surrogate model;

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