Aerodynamic Performance of a Notional Perching MAV Design

Reich, Gregory W.; Albertani, Roberto

doi:10.2514/6.2009-63

Cited by 27 publications

(19 citation statements)

References 10 publications

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“…Wickenheiser and Garcia [5,6] studied the dynamics of morphing aircraft and demonstrated perching using, among other forms of articulation, variable wing incidence. Reich et al [7] experimentally studied the aerodynamic performance of a wing of variable incidence for perching. The lateral stability and control of birds, and in particular, the role of wing dihedral, have been studied extensively by Sachs and co-authors [8][9][10].…”

Section: A Literature Reviewmentioning

confidence: 99%

Flight mechanics of a tailless articulated wing aircraft

Paranjape¹,

Chung²,

Selig³

2011

Bioinspir. Biomim.

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This paper explores the flight mechanics of a Micro Aerial Vehicle (MAV) without a vertical tail. The key to stability and control of such an aircraft lies in the ability to control the twist and dihedral angles of both wings independently. Specifically, asymmetric dihedral can be used to control yaw whereas antisymmetric twist can be used to control roll. It has been demonstrated that wing dihedral angles can regulate sideslip and speed during a turn maneuver. The role of wing dihedral in the aircraft's longitudinal performance has been explored. It has been shown that dihedral angle can be varied symmetrically to achieve limited control over aircraft speed even as the angle of attack and flight path angle are varied. A rapid descent and perching maneuver has been used to illustrate the longitudinal agility of the aircraft. This paper lays part of the foundation for the design and stability analysis of an agile flapping wing aircraft capable of performing rapid maneuvers while gliding in a constrained environment.drag, lift and side force J R,R , J L,R moment of inertia tensor of the right and left wings respectively, in their respective wing root frames J R , J L , J moment of inertia tensor of the right and left wings, and the aircraft body respectively, in the aircraft body frame m w,R , m w,L mass of the right and left wings, respectively m total mass of the aircraft p, q, r body axis roll, pitch and yaw rates r CG

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Section: A Literature Reviewmentioning

confidence: 99%

Flight mechanics of a tailless articulated wing aircraft

Paranjape¹,

Chung²,

Selig³

2011

Bioinspir. Biomim.

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“…Mimicking the manoeuvrability of birds, particularly the ability to land safely on narrow platforms, would allow them to complete these tasks effectively and efficiently. Though recent advances have been made in designing MAVs that can land on a perch (Doyle et al 2011;Moore et al 2014;Reich et al 2009), existing MAVs still fall short in achieving the control, speed and precision of natural flyers in landing manoeuvres.…”

Section: Introductionmentioning

confidence: 99%

Unsteady dynamics of rapid perching manoeuvres

2015

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A perching bird is able to rapidly decelerate while maintaining lift and control, but the underlying aerodynamic mechanism is poorly understood. In this work we perform a study on a simultaneously decelerating and pitching aerofoil section to increase our understanding of the unsteady aerodynamics of perching. We first explore the problem analytically, developing expressions for the added-mass and circulatory forces arising from boundary-layer separation on a flat-plate aerofoil. Next, we study the model problem through a detailed series of experiments at Re = 22000 and two-dimensional simulations at Re = 2000. Simulated vorticity fields agree with particle image velocimetry measurements, showing the same wake features and vorticity magnitudes. Peak lift and drag forces during rapid perching are measured to be more than 10 times the quasi-steady values. The majority of these forces can be attributed to added-mass energy transfer between the fluid and aerofoil, and to energy lost to the fluid by flow separation at the leading and trailing edges. Thus, despite the large angles of attack and decreasing flow velocity, this simple pitch-up manoeuvre provides a means through which a perching bird can maintain high lift and drag simultaneously while slowing to a controlled stop.

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“…Wickenheiser and Garcia demonstrated perching manuever with controlled wing twist and variable tail incidence. 5,7 Reich et al 8 experimentally studied the aerodynamic performance of a wing of variable incidence for perching. Roberts et al 9 examined the perching problem from controllability aspects.…”

mentioning

confidence: 99%

Experimental Demonstration of Perching by an Articulated Wing MAV

Paranjape

Kim

Gandhi

et al. 2011

AIAA Guidance, Navigation, and Control Conference

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This paper presents an experimental demonstration of perching by a micro aerial vehicle (MAV) equipped with articulated wings. A novel feature of the MAV considered in this paper is that wing dihedral, controlled independently on both wings, is used for yaw stability and control as well as for maintaining the flight path angle. Yaw stability and control are essential for perching in tightly constrained places. The experiments described in this paper were conducted indoors and flight parameters are measured using the VICON motion capture system.coefficients of lift and drag C m,ac coefficient of pitching moment about the aerodynamic center N yawing moment α, β angle of attack, sideslip ψ, θ, φEuler angles γ flight path angle p, q, r body axis roll, pitch and yaw rates δ L , δ R dihedral angle of left and right wing δ a , δ s asymmetric dihedral angle (δ R = −δ L = −δ a ) and symmetric dihedral angle δ e elevator or horizontal tail deflection

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Aerodynamic Performance of a Notional Perching MAV Design

Cited by 27 publications

References 10 publications

Flight mechanics of a tailless articulated wing aircraft

Flight mechanics of a tailless articulated wing aircraft

Unsteady dynamics of rapid perching manoeuvres

Experimental Demonstration of Perching by an Articulated Wing MAV

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