Journal ArticleDOI
Development of High-rate, Adaptive Trailing Edge Control Surface for the Smart Wing Phase 2 Wind Tunnel Model:
TLDR
The DARPA/AFRL/NASA Smart Wing program, led by Northrop Grumman Corporation (NGC) under the DARPA Smart Materials and Structures initiative, addressed the development of smart technologies and demonstration of relevant concepts to improve the aerodynamic performance of military aircraft as discussed by the authors.Abstract:
The DARPA/AFRL/NASA Smart Wing program, led by Northrop Grumman Corporation (NGC) under the DARPA Smart Materials and Structures initiative, addressed the development of smart technologies and demonstration of relevant concepts to improve the aerodynamic performance of military aircraft. In Phase 2, Test 2 of the program, the main objective was to demonstrate high-rate actuation of hingeless, spanwise, and chordwise deformable control surfaces using smart materials-based actuators on a 30% scale, full span wind tunnel model of a proposed NGC uninhabited combat air vehicle (UCAV). A minimum actuation rate of 25° flap deflection in 0.33 s, producing a slew rate of 75°/s, was desired. This slew rate is representative of many operational military aircrafts with hinged control surfaces. Numerous trade studies were performed on a variety of smart materials and flexible structure configurations before arriving at the final trailing edge structure design that consisted of a flexcore center and elastomeric outer s...read more
Citations
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Journal ArticleDOI
A Review of Morphing Aircraft
TL;DR: In this paper, the authors classify the shape morphing parameters that can be affected by planform alteration (span, sweep, and chord), out-of-plane transformation (twist, dihedral/gull, and span-wise bending), and airfoil adjustment (camber and thickness).
Journal ArticleDOI
Shape morphing of aircraft wing: Status and challenges
TL;DR: The use of SMA-actuated structures in shape morphing wing designs reduces the weight penalty due to the actuation systems, because such SMAactuated structure carries aerodynamic loads as mentioned in this paper.
Journal ArticleDOI
Review of morphing concepts and materials for wind turbine blade applications
TL;DR: In this article, a review of the most relevant concepts for morphing structures and materials that achieve compliant shape adaptation for wind turbine blades is presented, highlighting the key challenge of replacing the stiff and strong design of current blades with more compliant structures.
Journal ArticleDOI
Fundamentals of soft robot locomotion.
TL;DR: This paper aims to provide a reference guide for researchers approaching mobilesoft robotics, to describe the underlying principles of soft robot locomotion with its pros and cons, and to envisage applications and further developments for mobile soft robotics.
Journal ArticleDOI
Flexible Skins for Morphing Aircraft Using Cellular Honeycomb Cores
K. R. Olympio,Farhan Gandhi +1 more
TL;DR: In this paper, a cellular honeycomb core covered by a compliant face-sheet was examined for morphing aircraft applications, and the results showed that the cellular cores could easily undergo global strains over 10 times greater than the virgin material of which they were built.
References
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Proceedings ArticleDOI
Overview of the DARPA/AFRL/NASA Smart Wing program
Jayanth N. Kudva,Christopher A. Martin,Lewis B. Scherer,A. Peter Jardine,Anna-Maria Rivas McGowan,Renee C. Lake,George P. Sendeckyj,Brian Sanders +7 more
TL;DR: The DARPA/AFRL/NASA Smart Wing program, conducted by a team led by Northrop Grumman Corporation (NGC) under the DARPA Smart Materials and Structures initiative, addresses the development of smart technologies and demonstration of relevant concepts to improve the aerodynamic performance of military aircraft.
Proceedings ArticleDOI
Improved design and performance of the SMA torque tube for the DARPA Smart Wing program
TL;DR: The Smart Wing wind tunnel tests at NASA Langley demonstrated over 5° of span-wise wing twist at M=O. This was a considerable improvement over the 1.25° of twist demonstrated during the initial tunnel test.
Proceedings ArticleDOI
Development of high-rate large-deflection hingeless trailing-edge control surface for the Smart Wing wind tunnel model
TL;DR: The Smart Wing Phase 2, Test 2 is to demonstrate high-rate actuation of hingeless control surfaces using smart material-based actuators as discussed by the authors, which is similar to those specified for many of the existing military platforms with hinged control surfaces.
Proceedings ArticleDOI
Design, fabrication, and testing of scaled wind tunnel model for the Smart Wing Phase 2 program
TL;DR: In this paper, the authors describe a model design for required safety and increased aileron effectiveness at high dynamic pressure; model instrumentation; 3) SMA actuator control system design and implementation and 4) wind tunnel test results.
Proceedings ArticleDOI
Aerodynamic and aeroelastic characteristics of the DARPA Smart Wing Phase II wind tunnel model
TL;DR: In this paper, a wind tunnel demonstration was conducted on a scale model of an unmanned combat air vehicle (UCAV), which was configured with traditional hinged control surfaces and control surfaces manufactured with embedded shape memory alloys.