Examination of Stability Characteristics and Flight Quality for Transport Aircraft in Severe Atmospheric Turbulence
碩士 === 中華科技大學 === 飛機系統工程研究所 === 101 === Atmospheric turbulence is the leading cause of serious personal injuries in non-fatal accidents of commercial aircraft. One main type of motion that causes flight injuries in atmospheric turbulence is the sudden plunging motion with the abrupt change in altitu...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2013
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| Online Access: | http://ndltd.ncl.edu.tw/handle/86498245276075921774 |
| Summary: | 碩士 === 中華科技大學 === 飛機系統工程研究所 === 101 === Atmospheric turbulence is the leading cause of serious personal injuries in non-fatal accidents of commercial aircraft. One main type of motion that causes flight injuries in atmospheric turbulence is the sudden plunging motion with the abrupt change in altitude. The main objective of the present study is to examine the stability characteristics and flying quality for A300B4-600R and A330-200 transports in cruising and descending phases encountering severe atmospheric turbulence, respectively. In the present study, a numerical modeling method based on Fuzzy-logic Modeling (FLM) technique is presented to estimate the aerodynamic models for these two twin-jet transports by using flight data . Two models are used to analyze stability and flight simulations. The longitudinal and lateral-directional motion modes are analyzed through digital flight simulation based on decoupled and 6-DOF dynamic equations of motion. The fuzzy-logic aerodynamic models are utilized to estimate the nonlinear unsteady aerodynamics while performing numerical integration of flight dynamic equations. The eigenvalues of all motion modes are obtained during time integration. The results are analyzed to provide the mitigation concepts and promote the understanding of aerodynamic responses of the commercial transport aircraft in severe atmospheric turbulence.
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