&lt;title&gt;DARPA/AFRL Smart Wing Phase 2 wind tunnel test results&lt;/title&gt;

Scherer, Lewis B.; Martin, Christopher; Sanders, Brian; West, Mark N.; Pinkerton-Florance, Jennifer L.; Wieseman, Carol D.; Burner, A. W.; Fleming, Gary A.

doi:10.1117/12.475104

Cited by 18 publications

(10 citation statements)

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“…Two adaptronic actuation concepts, the one based on SMA wire actuators and the other on eccentuators driven by piezoelectric ultrasonic travelling wave motors have been explored. Wind tunnel tests showed that the hinge-less control surface concept has been able to demonstrate a 17% improvement in rolling moment coefficients at 15 degrees of control surface deflection when compared to the conventional wing [9]. SAMPSON [10] has been a programme in which the air inlet duct of a F-15 fighter aircraft has been made adaptive to improve engine performance for different flight conditions.…”

Section: Shape Control and Active Flowmentioning

confidence: 97%

Adaptronic Systems for Aerospace Applications (Adaptronische Systeme für Anwendungen in der Luftfahrt)

Boller¹

2006

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Summary An overview of different activities related to the application of adaptronics is given, which includes structural health monitoring, shape control and active flow, damping of vibration and noise, and smart skins. Micro aerial vehicles are described as an interesting adaptronics demonstrator platform with aerospace in general being vigorously showing where adaptronics can be applied.

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Section: Shape Control and Active Flowmentioning

confidence: 97%

Adaptronic Systems for Aerospace Applications (Adaptronische Systeme für Anwendungen in der Luftfahrt)

Boller¹

2006

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“…Some organizations and researchers have focused on morphing wing using SMA as actuators. The DARPA/AFRL/NASA/Northrop Grumman Smart Wing program [2] became the most famous one by realizing hingeless smart control of the curved surface of airfoil structure with SMA, the results of which showed that improvements in rolling moment and overall pressure distributions were achieved as compared to a conventional aileron [3][4][5]. Yousefi-Koma and Zimcik [6], Nam et al [7] and Florance et al [8] have assembled a Variable Stiffness Spar inside a wing to realize the changeability of stiffness to improve aerodynamic quality.…”

Section: Introductionmentioning

confidence: 99%

A changeable aerofoil actuated by shape memory alloy springs

Dong

Zhang

Liang

2008

Materials Science and Engineering: A

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“…In more recent years, the Defense Advanced Research Projects Agency (DARPA)/U.S. Air Force Research Laboratory (AFRL) Smart Wing projects [6,7] and the investigation and tests performed by FlexSys [8] have highlighted once more the aerodynamic potential offered by morphing, additionally demonstrating the possibility to perform the required shape changes through the use of compliant mechanisms, reducing the complexity, the parts count, the wear, and the mass of the resulting system.…”

Section: Introductionmentioning

confidence: 99%

Aerostructural Performance of Distributed Compliance Morphing Wings: Wind Tunnel and Flight Testing

et al. 2016

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The aerodynamic and structural performance of a morphing wing concept, based on fully compliant structures and actuated by closed-loop controlled solid state piezoelectric actuators, is investigated numerically and experimentally. The morphing wings are designed for a 1.75-m-span unmanned aerial vehicle operating at up to 30 m∕s, following lightweight aeronautical construction principles. The goal of providing roll controllability exclusively through morphing is achieved with a concurrent aerostructural optimization, considering static and dynamic aeroelastic effects. The aeroelastic response of the wings is experimentally assessed through wind tunnel tests, performed at different speeds, angles of attack, and actuation levels. The test campaign confirms the ability to achieve lift and rolling moment variations while maintaining a high aerodynamic efficiency, and the results closely match the numerical predictions. An 8-min flight test is performed by replacing the unmanned aerial vehicle wings with the morphing system, demonstrating the capabilities of the concept in its operational environment. This experimental assessment confirms the performance of the design, its robustness, and the possibility of implementing the morphing concept and the required high-voltage control system in small unmanned aerial vehicles. Ultimately, the results show the possibility of replacing the conventional ailerons of similarly sized airplanes with the proposed solution, achieving significant efficiency improvements while guaranteeing controllability.

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<title>DARPA/AFRL Smart Wing Phase 2 wind tunnel test results</title>

Cited by 18 publications

References 0 publications

Adaptronic Systems for Aerospace Applications (Adaptronische Systeme für Anwendungen in der Luftfahrt)

Adaptronic Systems for Aerospace Applications (Adaptronische Systeme für Anwendungen in der Luftfahrt)

A changeable aerofoil actuated by shape memory alloy springs

Aerostructural Performance of Distributed Compliance Morphing Wings: Wind Tunnel and Flight Testing

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