Loading...
Please wait, while we are loading the content...
Similar Documents
Aerodynamic parameters of high performance aircraft estimated from wind tunnel and flight test data
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Klein, Vladislav Murphy, Patrick C. |
| Copyright Year | 1998 |
| Description | A concept of system identification applied to high performance aircraft is introduced followed by a discussion on the identification methodology. Special emphasis is given to model postulation using time invariant and time dependent aerodynamic parameters, model structure determination and parameter estimation using ordinary least squares an mixed estimation methods, At the same time problems of data collinearity detection and its assessment are discussed. These parts of methodology are demonstrated in examples using flight data of the X-29A and X-31A aircraft. In the third example wind tunnel oscillatory data of the F-16XL model are used. A strong dependence of these data on frequency led to the development of models with unsteady aerodynamic terms in the form of indicial functions. The paper is completed by concluding remarks. |
| File Size | 1198759 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980210397 |
| Archival Resource Key | ark:/13960/t9v16zx67 |
| Language | English |
| Publisher Date | 1998-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Flight Tests Time Dependence X-29 Aircraft X-31 Aircraft Supersonic Aircraft Unsteady Aerodynamics Wind Tunnel Tests Oscillations System Identification Aerodynamic Characteristics Fighter Aircraft 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 |
