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Deflection-based structural loads estimation from the active aeroelastic wing f/a-18 aircraft
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lokos, William A. Lizotte, Andrew M. |
| Copyright Year | 2005 |
| Description | Traditional techniques in structural load measurement entail the correlation of a known load with strain-gage output from the individual components of a structure or machine. The use of strain gages has proved successful and is considered the standard approach for load measurement. However, remotely measuring aerodynamic loads using deflection measurement systems to determine aeroelastic deformation as a substitute to strain gages may yield lower testing costs while improving aircraft performance through reduced instrumentation weight. This technique was examined using a reliable strain and structural deformation measurement system. The objective of this study was to explore the utility of a deflection-based load estimation, using the active aeroelastic wing F/A-18 aircraft. Calibration data from ground tests performed on the aircraft were used to derive left wing-root and wing-fold bending-moment and torque load equations based on strain gages, however, for this study, point deflections were used to derive deflection-based load equations. Comparisons between the strain-gage and deflection-based methods are presented. Flight data from the phase-1 active aeroelastic wing flight program were used to validate the deflection-based load estimation method. Flight validation revealed a strong bending-moment correlation and slightly weaker torque correlation. Development of current techniques, and future studies are discussed. |
| File Size | 431852 |
| Page Count | 27 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050172129 |
| Archival Resource Key | ark:/13960/t6k12202m |
| Language | English |
| Publisher Date | 2005-05-23 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Root-mean-square Errors Wing Roots Deflection Circuits Feasibility Analysis Strain Gages F-18 Aircraft Ground Tests Bending Moments Wings Potentiometers Instruments Aeroelasticity Aerodynamic Loads Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
