Experimental investigation on aerodynamic performance of a flapping wing vehicle in forward flight

Mazaheri, K.; Ebrahimi, A.

doi:10.1016/j.jfluidstructs.2011.04.001

Cited by 54 publications

(44 citation statements)

References 20 publications

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“…Extensive experiments have been carried out in the past to characterize the aerodynamics of natural fliers, such as birds (Spedding et al 2003;Hedenström et al 2006;Johansson and Hedenström 2009;Cheng et al 2016), bats Hubel et al 2010;Muijres et al 2011) and insects (Ellington et al 1996;Srygley and Thomas 2002;Bomphrey et al 2006Bomphrey et al , 2012Fuchiwaki et al 2013;Muijres et al 2014;Langley et al 2014;Henningsson et al 2015). Similar studies have also been reported for flapping-wing MAVs (De Clercq et al 2009;Mazaheri and Ebrahimi 2011;Ren et al 2013), or simplified mechanisms that mimic flapping kinematics, but do not possess the ability to fly independently (Ellington et al 1996;Birch and Dickinson 2001;Lehmann et al 2005;Tarascio et al 2005;Lu and Shen 2008;Ghosh et al 2012;Cheng et al 2014;Langley et al 2014).…”

Section: Introductionmentioning

confidence: 81%

“…On the other hand, flapping-wing propulsion of natural fliers has shown extraordinary flight capabilities at low Reynolds numbers (Cheng et al 2016;Muijres et al 2014;Karasek et al 2018), thus serving as an inspiration to the development of flapping-wing MAV (FWMAV) designs (Shyy et al 1999(Shyy et al , 2010Mueller 2001). Multiple bio-inspired FWMAVs have been developed worldwide (e.g., Nakata et al 2011;Keennon et al 2012;Ren et al 2013;Mazaheri and Ebrahimi 2011), among them also the DelFly of TU Delft (de Croon et al 2012. The DelFly will be used in this study as subject to investigate the aerodynamics of flapping wings and the vehicle itself will be described in further detail in Sects.…”

Section: Introductionmentioning

confidence: 99%

“…For these reasons, like in general aerospace research, the common practice to investigate flapping-wing flight has been to keep the test object at a fixed position relative to the laboratory frame (and hence the measurement setup) while representing the forward flight effect using a wind tunnel facility. Most often, the position and orientation of the test object (animal/MAV) are fixated with a mounting structure or a tether, preferably under conditions that are close to those of natural flight (Ellington et al 1996;Srygley and Thomas 2002;Bomphrey et al 2006;Nakata et al 2011;Mazaheri and Ebrahimi 2011;Ren et al 2013). This mounting results in a relatively simple setup, while, furthermore, the forces generated by the flapping wings can be measured with a balance simultaneously to the flow visualization.…”

Section: Introductionmentioning

confidence: 99%

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Large-scale volumetric flow visualization of the unsteady wake of a flapping-wing micro air vehicle

et al. 2019

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The objective of this experimental investigation is the volumetric visualization of the near wake topology of the vortex structures generated by a flapping-wing micro air vehicle. To achieve the required visualization domain (which in the present experiments amounts to a size of 60,000 cm 3 ), use is made of robotic particle image velocimetry, which implements coaxial illumination and imaging in combination with the use of helium-filled soap bubbles as tracer particles. Particle trajectories are determined via Lagrangian particle tracking and information of different phases throughout the flapping cycle is obtained by means of a phase-averaging procedure applied to the particle tracks. Experiments have been performed at different settings (flow speed, flapping frequency, and body angle) that are representative of actual flight conditions, and the effect of reduced frequency on the wake topology is investigated. Furthermore, experiments have been carried out in both tethered and freeflight conditions, allowing an unprecedented comparison between the aerodynamics of the two conditions. Graphic abstractElectronic supplementary material The online version of this article (https ://doi.org/10.

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Large-scale volumetric flow visualization of the unsteady wake of a flapping-wing micro air vehicle

et al. 2019

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“…For avian ornithopter which has more than 0.8 meter wing span, motorized Four-bar crank rocker mechanism is highly adequate to make the ornithopter airborn. This mechanism has only one degree of freedom for their flapping wing [5].…”

Section: Fig3 Delay Stall Mechanismmentioning

confidence: 99%

Review on Bio-Mimitic Robotic Bird

Sreedhar¹,

Baswani²,

Krishna³

2019

IJTSRD

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The present world has reached to a stage where most of the sophisticated and sensitive tasks are mostly done by artificial hands. This paper discuss about the details of artificial birds are also called as ornithopters which belongs to Micro Arial vehicle (MAV) category. Bio-mimicking robots have been replaced the place of human with their uncompromised accuracy and efficiencies. However the real challenges in developing MAVs is still unsolved and not interpreted as it flies in the transient and low Reynolds number flow. This paper investigated the aerodynamic factors of fly's which influence their flight, different kinematic mechanisms which drives the vehicle and different types of designs for wings and their performance. In line with this, both past and future of this innovative area were discussed. One other hand selection of material is also plays vital role in case of MAVs weight consideration. So, this paper explain the different material which suited for this kind of flying machine.

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“…Reviews of experimental and computational studies of the aerodynamics of flapping flight, for a wide variety of flight conditions and including articulated flight, have appeared in the aerodynamics literature [3], [4] and, [1]. Currently, most of the computational aerodynamics research in flapping wing flight mechanics is limited to the case in which wings are modeled as continuous membranes or plates, and in which the motion of the wing is a prescribed boundary condition on the flow.…”

Section: Introductionmentioning

confidence: 99%

Adaptive control for flapping wing robots with history dependent, unsteady aerodynamics

Dadashi

Feaster

Bledt

et al. 2015

2015 American Control Conference (ACC)

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This paper derives a history dependent formulation of the equations of motion of a flapping wing, groundbased robotic system and constructs an associated adaptive control strategy to track observed flapping motions in insect flight. A general methodology is introduced in which lift and drag forces are represented in terms of history dependent integral operators to model and identify the unknown and unmeasurable aerodynamic loading on the flapping wing robot. The resulting closed loop system constitutes an abstract Volterra integral equation whose state consists of the finite-dimensional vector of generalized coordinates for the robotic system and an infinite dimensional unknown function characterizing the kernel of the history dependent integral operator. Finite dimensional approximations of the state equations are derived via quadrature formula and finite element methods. These approximations yield history dependent equations that evolve in euclidean space. An adaptive control scheme based on passivity principles is derived for the approximate history dependent system. Lyapunov analysis guarantees stability of the closed loop system and that the tracking error and its derivative converge to zero. The novel control strategy introduced in this paper is noteworthy in that by introducing a history dependent adjoint operator in the state estimate equation, the analysis for convergence of the closed loop history dependent equations closely resembles the analysis used for conventional ODE systems.

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Experimental investigation on aerodynamic performance of a flapping wing vehicle in forward flight

Cited by 54 publications

References 20 publications

Large-scale volumetric flow visualization of the unsteady wake of a flapping-wing micro air vehicle

Large-scale volumetric flow visualization of the unsteady wake of a flapping-wing micro air vehicle

Review on Bio-Mimitic Robotic Bird

Adaptive control for flapping wing robots with history dependent, unsteady aerodynamics

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