Helicopter flight dynamic, rotor aerodynamic and dynamic analyses activities
have been a great dispute since the first helicopters, at both design and test stages.
Predicting rotor aerodynamic and dynamic characteristics, helicopter dynamic
behavior and trimmed flight conditions is a huge challenge to engineers as it
involves the tradeoff between accuracy, fidelity, complexity and computational cost.
Flight dynamic activities such as / predicting trim conditions, helicopter
dynamic behavior and simulation of a flight condition or maneuver mostly require
analysis tools with low computational cost and complexity. However this decreases
accuracy and fidelity of the model. On the other hand, analyses at design stages,
such as / blade geometric and structural design mostly requires accurate and higher
fidelity aerodynamic load predictions over the rotor disk. Contrarily this brings high
computational cost and complexity. Therefore separate analysis tools for each
objective or one complete tool that can be used for all purposes are essential.
Throughout this study a helicopter mathematical including trim model with a
selective and modular structure is developed as a generic analysis tool. The
selective structure enables the mathematical model to be used in both flight dynamic
and comprehensive analysis while the modular structure plays a role as an
infrastructure for further developments. The mathematical model developed is
validated with flight test data of several helicopters. Besides, commercial helicopter
comprehensive analysis tools are used to validate the mathematical model
analyses. Results showed good agreement with the compared data.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613643/index.pdf |
| Date | 01 September 2011 |
| Creators | Yucekayali, Arda |
| Contributors | Kutay, Ali Turker |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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