Aerodynamic modeling for flight mechanics analyses: Maintaining physical fidelity in the nonlinear regime
- Wright Lab., Wright-Patterson AFB, OH (United States)
Development of mathematical models that retain adequate fidelity to the physics of airframe aerodynamic and kinematic interactions has not kept pace with flight envelope expansion. Chapman and Yates, in an invited survey paper provide a succinct statement of the problem: {open_quote}With the advent of nonlinear aerodynamic parameter estimation came the question as to what nonlinear representation is {open_quotes}best{close_quotes}... which terms are required or allowed... ? (This question) has to do with fluid physics ... and has received very little attention in the literature on parameter estimation or model structure identification. ...In reviewing the literature on the general subject of nonlinear aerodynamic model identification and parameter estimation, most attention seems to be directed towards the algorithm with little attention paid to the correctness of the model.{close_quotes} There are many reasons for this situation. Two that are particularly important are: (1) model structures based on a sufficiently general theoretical framework are lacking and (2) there have been very few experiments explicitly designed to allow identification of valid model structures for some nonlinear flight regimes.
- OSTI ID:
- 482008
- Report Number(s):
- CONF-960503-; TRN: 97:002904-0040
- Resource Relation:
- Conference: 1. international conference on nonlinear problems in aviation and aerospace, Daytona Beach, FL (United States), 9-11 May 1996; Other Information: PBD: 1994; Related Information: Is Part Of First international conference on nonlinear problems in aviation & aerospace; Sivasundaram, S. [ed.]; PB: 729 p.
- Country of Publication:
- United States
- Language:
- English
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