Modeling Aircraft Wing Loads from Flight Data Using Neural Networks PDF Download
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Author: Michael J. Allen
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 22
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Author: Michael J. Allen
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 22
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Author: Candida D. Olney
Publisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 30
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Book Description
A limited evaluation of the F/A-18 baseline loads model was performed on the Systems Research Aircraft at NASA Dryden Flight Research Center (Edwards, California). Boeing developed the F/A-18 loads model using a linear aeroelastic analysis in conjunction with a flight simulator to determine loads at discrete locations on the aircraft. This experiment was designed so that analysis of doublets could be used to establish aircraft aerodynamic and loads response at 20 flight conditions. Instrumentation on the right outboard leading edge flap, left airleron, and left stabilator measured the hinge moment so that comparisons could be made between in-flight-measured hinge moments and loads model-predicted values at these locations. Comparisons showed that the difference between the loads model-predicted and in-flight-measured hinge moments was up to 130 percent of the flight limit load. A stepwise regression technique was used to determine new loads derivatives. These derivatives were placed in the load model, which reduced the error to within 10 percent of the flight limit load. This paper discusses the flight test methodology, a process for determining loads coefficients, and the direct comparisons of predicted and measured hinge moments and loads coefficients.
Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 20
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This report describes strain-gage calibration loading through the application of known loads of the Active Aeroelastic Wing F/A-18 airplane. The primary goal of this test is to produce a database suitable for deriving load equations for left and right wing root and fold shear; bending moment; torque; and all eight wing control-surface hinge moments. A secondary goal is to produce a database of wing deflections mesured by string potentiometers and the onboard flight deflection measurement system. Another goal is to produce strain-gage data through both the laboratory data acquisition system and the onboard aircraft data system as a check of the aircraft system. Thirty-two hydraulic jacks have applied loads through whiffletrees to 104 tension-compression load pads bonded to the lower wing surfaces. The load pads covered approximately 60 percent of the lower wing surface.
Author: Joseph Mathew
Publisher: Springer
ISBN: 3319957112
Category : Technology & Engineering
Languages : en
Pages : 775
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Book Description
These proceedings include a collection of papers on a range of topics presented at the 12th World Congress on Engineering Asset Management (WCEAM) in Brisbane, 2 – 4 August 2017. Effective strategies are required for managing complex engineering assets such as built environments, infrastructure, plants, equipment, hardware systems and components. Following the release of the ISO 5500x set of standards in 2014, the 12th WCEAM addressed important issues covering all aspects of engineering asset management across various sectors including health. The topics discussed by the congress delegates are grouped into a number of tracks, including strategies for investment and divestment of assets, operations and maintenance of assets, assessment of assets’ health conditions, risk and vulnerability, technologies, and systems for management of assets, standards, education, training and certification.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1102
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 720
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 456
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Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 834
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 686
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