Flapping Wing Deformation Measurement in Hover Flight Conditions

Chang, Kelvin; Nazare, Archit; Ifju, Peter

doi:10.1007/978-3-319-22446-6_18

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…This result is achieved by boosting lighting at really high levels with the help of pulsed light. Even recent applications of DIC in the context of dynamic measurements see the experimenter dealing with the motion blur in the same way described before [26], [27].…”

Section: Related Workmentioning

confidence: 99%

A Displacement Uncertainty Model for 2-D DIC Measurement Under Motion Blur Conditions

Lavatelli

Zappa

2017

IEEE Trans. Instrum. Meas.

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In this paper, the effects of motion blur on 2-D digital image correlation (DIC) measurements are discussed, with a particular focus on the description of displacement measurement uncertainty. The research started with the simulation of motion blur with a suitable literature-based algorithm. Then the state of the art of uncertainty analysis in the context of DIC was compared with simulation results, and it was found that the effects of motion blur on uncertainty are not predicted correctly by the literature models. This phenomenon is explained by the fact that the literature models do not consider motion blur. Consequently, a simple monodimensional case is analyzed. In this way, it has been possible to evaluate the sensitivity of DIC correlation function [evaluated as the sum of squared differences (SSD)] to motion blur. Using these results, it is possible to extend the analysis to the case of a generic image with the help of a power-law model. Eventually, the model proposed in this paper is able to represent the effects of motion blur correctly.

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Section: Related Workmentioning

confidence: 99%

A Displacement Uncertainty Model for 2-D DIC Measurement Under Motion Blur Conditions

Lavatelli

Zappa

2017

IEEE Trans. Instrum. Meas.

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Lift and Drag of Flapping Membrane Wings at High Angles of Attack

Zakaria

Allen

Woolsey

et al. 2016

34th AIAA Applied Aerodynamics Conference

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An experimental study was undertaken to assess the aerodynamic benefits of flapping in forward flight at various Reynolds numbers and flapping frequencies. The test article is a commercially available ornithopter whose flapping wing is a flexible membrane. Analysis has focused on the time-averaged aerodynamic performance (i.e. mean lift and thrust/drag). Results to date reveal a consistent trend in the variation of the thrust produced with changes in flapping frequency and angle of attack. These results are presented in terms of classical aircraft performance parameters, e.g. cycle-averaged lift and drag coefficients. The average effect of the flexible flapping wing on vehicle performance is thus expressed in familiar terms, parametrized by the flapping frequency.

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Flapping Wing Deformation Measurement in Hover Flight Conditions

Cited by 2 publications

References 16 publications

A Displacement Uncertainty Model for 2-D DIC Measurement Under Motion Blur Conditions

A Displacement Uncertainty Model for 2-D DIC Measurement Under Motion Blur Conditions

Lift and Drag of Flapping Membrane Wings at High Angles of Attack

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