Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres*
The key to high manoeuvre ability in bird flight lies in the combined morphing of wings and tail. The perching of a wild Haliaeetus Albicilla without running or wing flapping is recorded and investigated using a high-speed digital video. A shape reconstruction method is proposed to describe wing con...
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Online Access: | http://dx.doi.org/10.1088/1674-1056/ab610a https://iopscience.iop.org/article/10.1088/1674-1056/ab610a https://iopscience.iop.org/article/10.1088/1674-1056/ab610a/pdf |
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crioppubl:10.1088/1674-1056/ab610a 2024-09-15T18:10:35+00:00 Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* Tang, Di Liu, Dawei Zhu, Hai Huang, Xipeng Fan, Zhongyong Lei, Mingxia 2020 http://dx.doi.org/10.1088/1674-1056/ab610a https://iopscience.iop.org/article/10.1088/1674-1056/ab610a https://iopscience.iop.org/article/10.1088/1674-1056/ab610a/pdf unknown IOP Publishing https://iopscience.iop.org/page/copyright https://iopscience.iop.org/info/page/text-and-data-mining Chinese Physics B volume 29, issue 2, page 024703 ISSN 1674-1056 journal-article 2020 crioppubl https://doi.org/10.1088/1674-1056/ab610a 2024-08-26T04:18:56Z The key to high manoeuvre ability in bird flight lies in the combined morphing of wings and tail. The perching of a wild Haliaeetus Albicilla without running or wing flapping is recorded and investigated using a high-speed digital video. A shape reconstruction method is proposed to describe wing contours and tail contours during perching. The avian airfoil geometries of the Aquila Chrysaetos are extracted from noncontact surface measurements using a ROMBER 3D laser scanner. The wing planform, chord distribution and twist distribution are fitted in convenient analytical expressions to obtain a 3D wing geometry. A three-jointed arm model is proposed to associate with the 3D wing geometry, while a one-joint arm model is proposed to describe the kinematics of tail. Therefore, a 3D bird model is established. The perching sequences of the wild eagle are recaptured and regenerated with the proposed 3D bird model. A quasi-steady aerodynamic model is applied in the aerodynamic predictions, a four-step Adams–Bashforth method is used to calculate the ordinary differential equations, thus a BFGS based optimization method is established to predict the perching motions. Article in Journal/Newspaper Haliaeetus albicilla Aquila chrysaetos IOP Publishing Chinese Physics B 29 2 024703 |
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description |
The key to high manoeuvre ability in bird flight lies in the combined morphing of wings and tail. The perching of a wild Haliaeetus Albicilla without running or wing flapping is recorded and investigated using a high-speed digital video. A shape reconstruction method is proposed to describe wing contours and tail contours during perching. The avian airfoil geometries of the Aquila Chrysaetos are extracted from noncontact surface measurements using a ROMBER 3D laser scanner. The wing planform, chord distribution and twist distribution are fitted in convenient analytical expressions to obtain a 3D wing geometry. A three-jointed arm model is proposed to associate with the 3D wing geometry, while a one-joint arm model is proposed to describe the kinematics of tail. Therefore, a 3D bird model is established. The perching sequences of the wild eagle are recaptured and regenerated with the proposed 3D bird model. A quasi-steady aerodynamic model is applied in the aerodynamic predictions, a four-step Adams–Bashforth method is used to calculate the ordinary differential equations, thus a BFGS based optimization method is established to predict the perching motions. |
format |
Article in Journal/Newspaper |
author |
Tang, Di Liu, Dawei Zhu, Hai Huang, Xipeng Fan, Zhongyong Lei, Mingxia |
spellingShingle |
Tang, Di Liu, Dawei Zhu, Hai Huang, Xipeng Fan, Zhongyong Lei, Mingxia Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* |
author_facet |
Tang, Di Liu, Dawei Zhu, Hai Huang, Xipeng Fan, Zhongyong Lei, Mingxia |
author_sort |
Tang, Di |
title |
Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* |
title_short |
Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* |
title_full |
Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* |
title_fullStr |
Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* |
title_full_unstemmed |
Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* |
title_sort |
shape reconstructions and morphing kinematics of an eagle during perching manoeuvres* |
publisher |
IOP Publishing |
publishDate |
2020 |
url |
http://dx.doi.org/10.1088/1674-1056/ab610a https://iopscience.iop.org/article/10.1088/1674-1056/ab610a https://iopscience.iop.org/article/10.1088/1674-1056/ab610a/pdf |
genre |
Haliaeetus albicilla Aquila chrysaetos |
genre_facet |
Haliaeetus albicilla Aquila chrysaetos |
op_source |
Chinese Physics B volume 29, issue 2, page 024703 ISSN 1674-1056 |
op_rights |
https://iopscience.iop.org/page/copyright https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1674-1056/ab610a |
container_title |
Chinese Physics B |
container_volume |
29 |
container_issue |
2 |
container_start_page |
024703 |
_version_ |
1810448181350105088 |