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Scaling Laws Applied to a Modal Formulation of the Aeroservoelastic EquationsA method of scaling is described that easily converts the aeroelastic equations of motion of a full-sized aircraft into ones of a wind-tunnel model. To implement the method, a set of rules is provided for the conversion process involving matrix operations with scale factors. In addition, a technique for analytically incorporating a spring mounting system into the aeroelastic equations is also presented. As an example problem, a finite element model of a full-sized aircraft is introduced from the High Speed Research (HSR) program to exercise the scaling method. With a set of scale factor values, a brief outline is given of a procedure to generate the first-order aeroservoelastic analytical model representing the wind-tunnel model. To verify the scaling process as applied to the example problem, the root-locus patterns from the full-sized vehicle and the wind-tunnel model are compared to see if the root magnitudes scale with the frequency scale factor value. Selected time-history results are given from a numerical simulation of an active-controlled wind-tunnel model to demonstrate the utility of the scaling process.
Document ID
20030006727
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Pototzky, Anthony S. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Numerical Analysis
Report/Patent Number
AIAA Paper 2002-1598
Meeting Information
Meeting: 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Location: Denver, CO
Country: United States
Start Date: April 22, 2002
End Date: April 26, 2002
Sponsors: American Society of Mechanical Engineers, American Inst. of Aeronautics and Astronautics, American Helicopter Society, Inc., American Society of Civil Engineers, American Society for Composites
Distribution Limits
Public
Copyright
Public Use Permitted.

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