The Best Model Structure of Thrust Estimations for Jet Transport Aircraft

民航噴射飛機推力估算之最佳模型結構

臧瑞傳(Ray C. Chang) ； 譚嗣瀛(Szu-Ying Tan) ； 葉存恩(Cun-En Ye)

《中華技術學院學報》 41期 (2009/12) Pp. 137-151

https://doi.org/10.7095/JCIT.200912.0137

摘要

在飛行運動方程式中推力項是在三個力及俯仰力矩方程式裡，對一個桌上型飛行模擬器而言，模擬噴射民航機在六自由度的飛行軌跡、飛行姿態及動力安定性特徵時，推力估算的精確是非常重要的。本文敘述經由模糊邏輯演算法來建置噴射民航機推力模型之工程近似法，使用有限的數據資料建置模糊邏輯推力模型時，必須識別最好的模型結構。本文以最終推力模型在模型最佳化過程之前有三組不同模型結構來比較分析為案例，最好的模型結構能夠使模糊邏輯模型所輸出計算的結果更為精確。

關鍵字

模糊邏輯模型化 ； 推力模型 ； 飛行紀錄器

並列摘要

The thrust terms are in the equations of three forces and pitching moment of flight motion equations. For a desktop flight simulator to simulate the flight trajectory, flight attitudes, and dynamic stability characteristics of the jet transport flight in six degrees of freedom, the accuracy in predictions of thrust is quite important. This paper presents an engineering approach for a jet transport thrust model being set up through a fuzzy-logic algorithm. To establish a fuzzy-logic thrust model with a limited set of data, it is necessary to identify the best model structure. An example of comparative analysis for the resulting thrust model with three different sets of the optimal model structure before the refinement process of modeling is presented in this paper. The best model structure can make the fuzzy-logic model more accurate in estimating the thrust output.

並列關鍵字

fuzzy-logic modeling FLM ； thrust model ； flight data recorder FDR