Bat-inspired integrally actuated membrane wings with leading-edge sensing

Buoso, Stefano; Dickinson, Benjamin T.; Palacios, Rafael

doi:10.1088/1748-3190/aa9a7b

Cited by 13 publications

(4 citation statements)

References 28 publications

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“…For this reason, researchers now returning their interests of birds' flight abilities. For instance, Stefano Buoso investigated on the bat-inspired integrally actuated membrane wings, [8] Hightower et al investigated on the closed-loop performance of a two dimensional actuated membrane wing with fixed supports, [9] Ren et al revealed the sound suppression mechanisms of eagle owls. [10] Different species of birds have different flight talents, more stories about bird flying can be found in references.…”

Section: Introductionmentioning

confidence: 99%

A combined airfoil with secondary feather inspired by the golden eagle and its influences on the aerodynamics

et al. 2019

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Bird flight is a remarkable adaption that has allowed thousands of species to colonize all terrestrial habitats. A golden eagle has impressive flying abilities, such as hovering, perching, preying and attacking. To reveal the flying abilities, avian geometry of a golden eagle was extracted based on noncontact surface measurements using a ROMBER three-dimensional laser scanner. Distributions of a camber line, thickness and a secondary feather line of the extracted point cloud were fitted using convenient analytical expressions. A traditional airfoil was established with the camber line and thickness, then a combined airfoil was constructed by combining the traditional airfoil with a secondary feather. Oscillations of an airfoil as well as rapid pitch up were simplified as a sine wave around the quarter chord axis. Thereafter, both steady and unsteady aerodynamic performances of the airfoil are computed, the influences of the secondary feather on the steady and unsteady aerodynamics were further studied.

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Section: Introductionmentioning

confidence: 99%

A combined airfoil with secondary feather inspired by the golden eagle and its influences on the aerodynamics

et al. 2019

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“…The biophysical model for the LV is based on our previous work on cardiac mechanics [ 13 ] and material modelling [ 48 – 51 ]. A technical description is presented in the Supplementary material and in [ 13 ].…”

Section: Methodsmentioning

confidence: 99%

MRXCAT2.0: Synthesis of realistic numerical phantoms by combining left-ventricular shape learning, biophysical simulations and tissue texture generation

Buoso

Joyce

Schulthess

et al. 2023

Journal of Cardiovascular Magnetic Resonance

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Background Standardised performance assessment of image acquisition, reconstruction and processing methods is limited by the absence of images paired with ground truth reference values. To this end, we propose MRXCAT2.0 to generate synthetic data, covering healthy and pathological function, using a biophysical model. We exemplify the approach by generating cardiovascular magnetic resonance (CMR) images of healthy, infarcted, dilated and hypertrophic left-ventricular (LV) function. Method In MRXCAT2.0, the XCAT torso phantom is coupled with a statistical shape model, describing population (patho)physiological variability, and a biophysical model, providing known and detailed functional ground truth of LV morphology and function. CMR balanced steady-state free precession images are generated using MRXCAT2.0 while realistic image appearance is ensured by assigning texturized tissue properties to the phantom labels. Finding Paired CMR image and ground truth data of LV function were generated with a range of LV masses (85–140 g), ejection fractions (34–51%) and peak radial and circumferential strains (0.45 to 0.95 and − 0.18 to − 0.13, respectively). These ranges cover healthy and pathological cases, including infarction, dilated and hypertrophic cardiomyopathy. The generation of the anatomy takes a few seconds and it improves on current state-of-the-art models where the pathological representation is not explicitly addressed. For the full simulation framework, the biophysical models require approximately two hours, while image generation requires a few minutes per slice. Conclusion MRXCAT2.0 offers synthesis of realistic images embedding population-based anatomical and functional variability and associated ground truth parameters to facilitate a standardized assessment of CMR acquisition, reconstruction and processing methods.

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“…[2][3][4] Unlike the insect, a bat usually flies at a speed of 3-5 m/s, and the flapping frequency is about 10 Hz during a moderate flight. [5] On the other hand, characteristic speed of a pigeon is about 15 m/s, with wing flapping at a frequency of 1-2 Hz. The generated lift coefficient is about 0.47 and quasi-steady aerodynamics can be used to predict the lifts and drags.…”

Section: Introductionmentioning

confidence: 99%

Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres*

et al. 2020

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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.

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Bat-inspired integrally actuated membrane wings with leading-edge sensing

Cited by 13 publications

References 28 publications

A combined airfoil with secondary feather inspired by the golden eagle and its influences on the aerodynamics

A combined airfoil with secondary feather inspired by the golden eagle and its influences on the aerodynamics

MRXCAT2.0: Synthesis of realistic numerical phantoms by combining left-ventricular shape learning, biophysical simulations and tissue texture generation

Shape reconstructions and morphing kinematics of an eagle during perching manoeuvres*

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