2001 Assessment of the Office of Naval Research's Aircraft Technology Program (2001) / Chapter Skim
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5. Air Vehicle Technology
5. Air Vehicle Technology
Pages 21-28
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From page 21... ...
. Structural life attainment and enhancement, Condition-based maintenance, Reconfigurable rotor blade, Flight controls and dynamics, Abrupt wing stall, and Aerodynamics of advanced Navy air vehicles.
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From page 22... ...
Furthermore, there are continuing problem areas that will limit capability but that, if they are understood, can be exploited. One example involves the complex coupling of transonic aerodynamics with an elastic structure, moving control surfaces, and maneuvering flight, most recently found in F/A-18E/F flight tests.
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From page 23... ...
In the FACIA project, the heavily loaded composite control surface hinge and fittings appear to be a unique technology application that warrants continued pursuit. It was unclear what types of failure modes are being evaluated in the MUST project, whether micromechanical considerations are included, or how the life of the engineered failure mode will be quantified and used to derive field-level inspection strategies and metrics.
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From page 24... ...
The CBM project should take care to address the operability and reliability of wireless sensors in an already electronically dense onboard aircraft environment. Reconfigurable Rotor Blade The goal of this project is to develop a rotor blade that can be optimized in flight for the hover and cruise flight conditions to meet operational improvement goals of aerodynamic cruise efficiency and maximum blade hover loadings.
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From page 25... ...
, efficient generation of code, verification and validation (V&V) /testing of nondeterministic software, and prognostics and health management integrated with damage adaptive control, is commendable; however, that work remains restricted in application potential by its focus on traditional flight control functions.
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From page 26... ...
However, the specific solution of the abrupt wing stall problem on the F/A-18 E/F should be funded by that program office and not by S&T funds. Aerodynamics of Advanced Navy Air Vehicles This program consists of efforts in high-lift aerodynamics, empennage buffet loads prediction, shipaircraft airwake analysis for enhanced dynamic interface, and VSTOL suckdown, thermal, and acoustic limiting.
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From page 27... ...
ONR should consider the development of better tools and modeling to help realize the full potential of this research. Suggested Topics in Air Vehicle Technology for the Future ATP In addition, the following topics should be considered for the future ATP in this area: · Research and development should be conducted on the active reduction of vertical tail buffet by use of wing aerodynamic sources rather than on modification of the resulting structural response to the buffeting forces.
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From page 28... ...
Trade-offs based on human physiological limits have yielded the current concepts and configurations for air vehicle platforms. But now there is an opportunity to rethink and greatly improve aircraft maneuverablity.
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