Results 141 to 150 of about 3,197 (203)

Morphological Reconstruction for Variable Wing Leading Edge Based on the Node Curvature Vectors. [PDF]

Biomimetics (Basel)
Zeng J, Zhu Q, Zhao Y, Wang Z, Yang Y, Wu Q, Cui J.   +6 more
europepmc   +1 more source

Fuzzy logic based nonlinear blending hybrid control of a kestrel-inspired ornithopter operating in sinusoidal and dryden gusts. [PDF]

Sci Rep
Abbasi SH, Saudagar AKJ, Nouman A, Hennache ML.   +3 more
europepmc   +1 more source

Enhancing darrieus wind turbine performance through varied plain flap configurations for the solar and wind tree. [PDF]

Sci Rep
Eltayeb W, Somlal J, Singh AR, Alsaif F.
europepmc   +1 more source

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Morphing Airfoils with Four Morphing Parameters

AIAA Guidance, Navigation and Control Conference and Exhibit, 2008
An episodic unsupervised learning simulation using the Q-Learning method is developed to learn the optimal shape and shape change policy for a problem with four state variables. Optimality is addressed by reward functions based on airfoil properties such as lift coecient, drag coecient, and moment coecient about the leading edge representing optimal ...
Amanda Lampton, Adam Niksch, John Valasek   +2 more
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Passive Morphing Airfoil With Honeycombs

Volume 1: Advances in Aerospace Technology; Energy Water Nexus; Globalization of Engineering; Posters, 2011
A passive morphing may improve the aerodynamic characteristics through structural shape change by aerodynamic loads during the flight, resulting in improving fuel efficiency. The passive morphing structure should have a capability to be highly deformed while maintaining a sufficient stiffness in bending.
Hyeonu Heo, Jaehyung Ju, Doo-Man Kim, Chang-Soo Jeon   +3 more
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Shape Memory Alloy Morphing Airfoil Sections

Advances in Science and Technology, 2016
Shape memory alloys (SMA) provide common solid state actuators with reliable and unique characteristics. Their special behavior is based on a reversible phase transformation and can provide high power density, induced strain and block force which render them indispensable for use in morphing structures that require large shape changes while space and ...
Dimitris Saravanos, Theodoros Machairas, Alex Solomou, Anargyros Karakalas   +3 more
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Design and control of tensegrity morphing airfoils

Mechanics Research Communications, 2020
Abstract We present a general approach of design, dynamics, and control for tensegrity morphing airfoils. Firstly, based on reduced order Class-k tensegrity dynamics, a shape control law for tensegrity systems is derived. Then, we develop a method for discretizing continuous airfoil curves based on shape accuracy.
Muhao Chen, Jiacheng Liu, Robert E. Skelton   +2 more
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A hybrid morphing NACA4412 airfoil concept

2015 IEEE International Conference on Industrial Technology (ICIT), 2015
This paper details the design and development of a hybrid actuator system combining surface actuated Shape memory alloys (SMAs) and trailing-edge Macro fibre composites (MFCs) for a NACA 4412 airfoil. This design allows both for a high-frequent (≈ 100 Hz) low-displacement actuation as well as a low-frequent large-displacement actuation.
Scheller, Johannes, Rizzo, Karl-Joseph, Jodin, Gurvan, Duhayon, Eric, Rouchon, Jean-François, Braza, Marianna   +5 more
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Robust control of a morphing airfoil structure

Proceedings of the 2005, American Control Conference, 2005., 2005
This paper presents several robust control designs for a MIMO morphing airfoil concept. A linear aeroelastic model of the morphing wing is utilized to design an H/sub /spl infin// controller and a two degree of freedom H/sub /spl infin// loop shaping controller that track commanded lift and roll moments.
C.E. Whitmer, A.G. Kelkar
openaire   +1 more source