民航機遭遇強烈大氣亂流之飛行動力特徵比較分析

Comparative Analysis of Flight Dynamic Characteristics for Transport Aircraft in Severe Atmospheric Turbulence

譚嗣瀛(Szu-Ying Tan)；臧瑞傳(Ray C. Chang)；藍川滔(C. Edward Lan)；官文霖(Wen-Lin Guan)

大氣亂流 ； 模糊邏輯模型化 ； 飛行資料紀錄器 ； 氣動力模型益 ； Atmospheric turbulence ； Fuzzy-Logic Modeling (FLM) ； Flight Data Recorder (FDR) ； Aerodynamic models

航空安全及管理季刊

1卷2期（2014 / 04 / 01）

103 - 129

英文

本論文之主要目的是分析兩架相似類型的雙發動機噴射民航機在穿音速飛行遭受到強烈大氣亂流在發生突然的起伏運動時的安定性與可操控性。在所有大氣擾動的類型中，大氣亂流相當難以偵測及預報，因而一直是最大的飛行安全危害。為了有效分析飛機遭遇強烈大氣亂流期間之安定性與可操控性變化，以飛行數據為基礎的非線性及動態（亦即：隨時間變化的）氣動力模型是必須具備的。在本論文中將呈現模糊邏輯模型化（Fuzzy-Logic Modeling, FLM）技術，使用由飛行資料紀錄器（flight data recorder, FDR）中取得的飛行數據建立這兩架民航機的非穩態氣動力模型，安定性與控制導數將會由這些氣動力模型計算出來。本研究之成果將可提供降低危害，並可增進對於商用民航機在強烈大氣亂流中的氣動力響應之瞭解。

The main objective of this paper is to analyze the stability and controllability for two similar twin-jet transports in severe atmospheric turbulence with sudden plunging motion in transonic flight. The atmospheric turbulence is particularly difficult to detect and predict among all atmospheric disturbances, and yet affect the flight safety the most. To effectively analyze the performance degradation and variations in stability and controllability of aircraft encountering severe atmospheric turbulence, the nonlinear and dynamic (i.e. time-dependent) aerodynamic models based on flight data would be needed. In this paper, a numerical modeling method based on Fuzzy-Logic Modeling (FLM) technique will be presented to estimate the unsteady aerodynamic models for these two twin-jet transports by using flight data from flight data recorder (FDR). The stability and control derivatives to be presented will be calculated from these aerodynamic models. 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.

1. Chang, R. C.,Ye, C. E.,Lan, C. E.,Guan, W. L.(2010).Stability Characteristics for Transport Aircraft Response to Clear-Air Turbulence.Journal of Aerospace Engineering,23(3),197-204.
2. Chang, R. C.,Ye, C. E.,Lan, C. E.,Guan, W. L.(2009).Flying Qualities for a Twin-Jet Transport in Severe Atmospheric Turbulence.AIAA Journal of Aircraft,46(5)
3. Cornman, L.B.,Morse, C.,Cunning, G.(1995).Real-time estimation of atmospheric turbulence severity from in-situ aircraft measurements.Journal of Aircraft,32,171-177.
4. Hamilton, D. W.,Proctor, F. H.(2003).An Aircraft Encounter with Turbulence in the Vicinity of a Thunderstorm.AIAA Paper
5. Lee, Y. N.,Lan, C. E.(2000).Analysis of Random Gust Response with Nonlinear Unsteady Aerodynamics.AIAA Journal,38(8),1305-1312.
6. Li, J.,Lan, C. E.(2003).Unsteady Aerodynamic Modeling of Aircraft Response to Atmospheric Turbulence.AIAA Paper
7. Nelson, Robert C.(1998).Flight Stability and Automatic Control.McGraw-Hill Corporation.
8. Sheu, D.,Lan, C. E.(2011).Estimation of Turbulent Vertical Velocity from Nonlinear Simulations of Aircraft Response.Journal of Aircraft,48(2),645-651.
9. Stewart, E.C.(2003).,NASA.
10. Wang, Z.,Lan, C. E.(1999).Fuzzy Logic Modeling of Lateral-Directional Unsteady Aerodynamics.AIAA Paper
11. Wang, Z.,Lan, C. E.(1998).Fuzzy Logic Modeling of Nonlinear Unsteady Aerodynamics.AIAA Paper
12. Zadeh, L. A.(1973).Outline of New Approach to the Analysis of Complex Systems and Decision Processes.IEEE Transactions on Systems, Man, and Cybernetics,SMC-3(1)

1. Lan, C. Edward,Chang, Ray C.(2016).Mechanisms of Sudden Plunging Motion for Transport Aircraft in Severe Atmospheric Turbulence Performances.航空安全及管理季刊,3(2),134-154.