| 研究課題/領域番号 |
18K13693
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| 研究機関 | 国立研究開発法人海洋研究開発機構 |
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研究代表者 |
Kolomensk Dmitry 国立研究開発法人海洋研究開発機構, 付加価値情報創生部門(地球情報基盤センター), 特任研究員 (00813924)
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| 研究期間 (年度) |
2018-04-01 – 2021-03-31
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| キーワード | insect flight / bio-inspired flight / HPC |
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| 研究実績の概要 |
A quasi-steady model has been developed that provides quick evaluation of the fluid-dynamic forces. This is critical for time effectiveness of the reinforcement learning process. Linear controller models have been proposed. A manuscript has been submitted on this topic (Cai et al. 2020, J. Fluid Mech., under review). Tests of reinforcement learning are in progress.
Direct import of geometrical models based on micro-CT scans into the CFD software has been implemented for steady conditions. In addition, the mass-spring model of wing deformation has undergone first evaluation using CFD coupled solver (Truong et al. 2020, Comput. Fluids 200:104426), and it is presently at the parameter identification stage. Numerical simulations of micro-insects with bristled wings have been carried out.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
Overall progress is as anticipated. Availability of new biological data on featherwing beetles has motivated inclusion of the ptiliid species in the analysis.
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| 今後の研究の推進方策 |
The quasi-steady aerodynamic model will be combined with a simple flight dynamics model and integrated in a reinforcement learning loop. Model coefficients for featherwing beetles will be determined. Simplified phenomenological biomimetic sensorimotor models will be hypothesized. Numerical simulations of controlled free flight in perturbed air environment will be implemented. Optimal state-action policies will be obtained for each hypothesized sensorimotor model and a selected reward function. Simulated optimal trajectories in the phase plane will be compared with those observed in experiments, in order to identify biologically relevant policies. The mass-spring model of flexible wings will be fit with the mass and bending stiffness distribution from computer tomographic reconstruction and static bending experiments. The results will be used to explain the variability of wing kinematics in free flight. Conclusion on possible engineering application will be drawn.
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| 次年度使用額が生じた理由 |
New numerical simulations will be performed using Tsubame supercomputer. Thus, part of the grant will be used to cover the costs of using that supercomputer facility. Also, it may become necessary to buy additional external hard disks for data storage. Since I was unable to present the results of the project at the SICB 2020 annual meeting, I plan to participate in the next meeting in January 2021, if it is held on schedule. A new manuscript containing new results has been submitted to Experiments in Fluids. If accepted, open access publication fees will be paid from the grant.
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