Results 151 to 160 of about 3,197 (203)

Airfoil morphing based on SMA actuation technology

Aircraft Engineering and Aerospace Technology, 2014
Purpose – This study aims to develop an innovative actuator for improving the performance of future aircraft, by adapting the airfoil shape according to the flight conditions. The flap’s camber of a civil regional transportation aircraft’s trailing edge actuated and morphed with the use of shape memory alloys (SMA) actuator technology, instead of the ...
Dimitri Karagiannis, Dimitrios Stamatelos, Theodoros Spathopoulos, Alexandros Solomou, Theodoros Machairas, Nikos Chrysohoidis, Dimitrios Saravanos, Vassilios Kappatos   +7 more
openaire   +1 more source

Camber Controlled Airfoil Design for Morphing UAV

47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition, 2009
Morphing technology, inspired by bat and bird flight, can enable an aircraft to adapt its shape to best suit the flight condition thereby enhancing mission performance. In this paper, we propose a camber change for the morphing of airfoils with the aim of improving aerodynamic efficiency.
Cody Lafountain, Kelly Cohen, Shaaban Abdallah   +2 more
openaire   +1 more source

Deep reinforcement learning achieves multifunctional morphing airfoil control

Journal of Composite Materials, 2022
Smooth camber morphing aircraft offer increased control authority and improved aerodynamic efficiency. Smart material actuators have become a popular driving force for shape changes, capable of adhering to weight and size constraints and allowing for simplicity in mechanical design. As a step towards creating uncrewed aerial vehicles (UAVs) capable of
Kevin P T Haughn, Lawren L Gamble, Daniel J Inman   +2 more
openaire   +1 more source

Modeling and Control of a Morphing Airfoil

Dynamic Systems and Control, Volumes 1 and 2, 2003
This paper presents aeroelastic modelling and robust control design for a morphing airfoil concept. A finite dimensional linear time invariant aeroelastic model is developed for a multi-input multi-output morphing airfoil structure. The shape of the airfoil (NACA airfoil series 2415) is controlled by actuators distributed along the top airfoil surface ...
Christopher E. Whitmer, Atul G. Kelkar, Phuc Vu, Frank R. Chavez   +3 more
openaire   +1 more source

Smart material actuators for airfoil morphing applications

SPIE Proceedings, 2004
This paper outlines the testing of a piezoelectric ultrasonic motor (PUSM). The authors propose the use of a pseudoelastic NiTi thin film layer to replace the traditional fiber reinforced polymer contact layer. In accordance with this goal, a literature review of reported accomplishments in the area of the tribology of NiTi, both shape memory and ...
Ruth M. Tieck, K. P. Mohanchandra, Gregory P. Carman   +2 more
openaire   +1 more source

Application of morphing technique to airfoil design

2012 Oceans - Yeosu, 2012
Airfoil is a cross section of a wing or blade and can be represented by polygonal lines. Although drawing an airfoil shape is an easy matter, selecting a right shape fit for the purpose is not. The shape of the airfoil profile is a key factor for good performance of the turbines, making it essential to optimise the airfoil for a maximum lift with a ...
Ju Young Kang, B S Lee
openaire   +1 more source

Bi-Directional Stiffness for Airfoil Camber Morphing

AIAA Journal, 2018
This paper explores a new design for an airfoil whose chordwise bending stiffness varies with direction of applied load.
Matthew DiPalma, Farhan Gandhi
openaire   +1 more source

Morphing Airfoil with Thermally Activated SMA Actuators

ISSS Journal of Micro and Smart Systems, 2017
In this paper we study a type of design of Shape Memory Alloy (SMA) wire actuated morphing airfoil having discontinuous skin by targeting trailing edge deflection and changing camber. The design aims at airfoils to have optimal directional stiffness and relaxed shear constraint to allow the required change to create a conformal target shape.
R. Aditya Reddy, Dhaval D. Hinglajia, A. Modi, V. Prithivirajan, S. R. Hiremath, P. Sazawal, D. Roy Mahapatra   +6 more
openaire   +1 more source

Aeroacoustic and aerodynamic characteristics of a morphing airfoil

Aircraft Engineering and Aerospace Technology, 2021
Purpose This paper aims to assess the aeroacoustic and aerodynamic performance of a morphing airfoil with a flexible trailing edge (FTE). The objective is to make a comparison of the aerodynamic noise characteristics between the conventional airfoil with a flap and morphing airfoil and analyse the noise reduction mechanisms of the morphing airfoil ...
Zi Kan, Daochun Li, Shiwei Zhao, Jinwu Xiang, Enlai Sha   +4 more
openaire   +1 more source

A Novel SMA-based Concept for Airfoil Structural Morphing

Journal of Materials Engineering and Performance, 2009
The adaptive structures concept is of great interest in the aerospace field because of the several benefits which can be accomplished in the fields including noise reduction, load alleviation, weight reduction, etc., at a level in which they can be considered as compulsory in the design of future aircraft.
Barbarino S., PECORA, ROSARIO, LECCE, LEONARDO, Concilio A., Ameduri S., Calvi E.   +5 more
openaire   +2 more sources