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Improved flight test procedures for flutter clearance
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Freudinger, Lawrence C. Lind, Rick C. Brenner, Martin J. |
| Copyright Year | 1997 |
| Description | Flight flutter testing is an integral part of flight envelope clearance. This paper discusses advancements in several areas that are being investigated to improve efficiency and safety of flight test programs. Results are presented from recent flight testing of the F/A-18 Systems Research Aircraft. A wingtip excitation system was used to generate aeroelastic response data. This system worked well for many flight conditions but still displayed some anomalies. Wavelet processing is used to analyze the flight data. Filtered transfer functions are generated that greatly improve system identification. A flutter margin is formulated that accounts for errors between a model and flight data. Worst-case flutter margins are computed to demonstrate the flutter boundary may lie closer to the flight envelope than previously estimated. This paper concludes with developments for a distributed flight analysis environment and on-line health monitoring. |
| File Size | 709903 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980018481 |
| Archival Resource Key | ark:/13960/t20c9wg8f |
| Language | English |
| Publisher Date | 1997-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Stability And Control Dynamic Response Flight Tests Transfer Functions On-line Systems Clearances Boundaries Flight Envelopes Research Aircraft Flutter Safety System Identification Environmental Monitoring Aeroelasticity Anomalies 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 |
