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題名 | An Investigation of Civil Aircraft Performance Parameters via the Hilbert-Huang Transform Method=利用希爾伯特-黃轉換法之民用飛機性能參數研究 |
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作者姓名(中文) | 鄭宇軒; 宛同; | 書刊名 | 航空安全及管理季刊 |
卷期 | 2:3 2015.07[民104.07] |
頁次 | 頁310-329 |
分類號 | 447.5 |
關鍵詞 | 飛航操作品保系統; 希爾伯特-黃轉換; 飛行資料分析; Flight operational quality assurance; Hilbert-huang transform; Flight data analysis; |
語文 | 英文(English) |
中文摘要 | 本研究主旨是利用希爾伯特-黃轉換(Hilbert-Huang Transform, HHT)分析飛行操作品質系統之飛行性能參數資料,目的是利用希爾伯特-黃轉換分析原始訊號,從隱藏且以頻率為基底的本質模態函數群(Intrinsic Mode Functions, IMF)中找出規律性模式。本研究使用模擬拍撲翼在風場下的氣動訊號作為基準,證明希爾伯特-黃轉換分析整合的實用性。實際案例則以某民航班機的三筆正常航班及一筆異常航班資料為例,異常航班的引擎數據是一號引擎在巡航階段空中熄火的狀況,以系統方法分析之,飛機扭力參數序列排列資料說明潛在因子被偵測到的可能性,但因子仍然不明顯,原因主要為引擎參數變化通常發生在微秒之間,而飛行原始數據資料則是1Hz之紀錄,此造成資料先天不精準性。另外頻率相似度F是支配排列結果的重要因子,飛行資料中找出相似模式的機率為55.13%。本研究結論證實希爾伯特-黃轉換的可行性,未來期望加入進階的經驗搜尋法則,從排列結果中更快速找到相似模式及資料同源性。 |
英文摘要 | Flight Operational Quality Assurance (FOQA) flight data and flapping wings results were examined by the aid of Hilbert-Huang Transform (HHT) method. The purpose of applying HHT is to find the hidden frequency-based (Intrinsic Mode Functions) IMF patterns from the origin signal. From flight data of three normal flights and one abnormal flight, a case of engine No.1 failure during cruise was extracted from a twin-engine turboprop airliner. Several important alignment results of different flight phases were found in the parameter of this flight indicates the existence of potential risk factors before the event flight. The alignment results of FOQA engine failure during operation in flight are vague, and are mainly due to the fact that engine failure usually appears to be a sudden change within milliseconds. The data time interval used in current work is 1 Hz, thus is considered as the congenital missing of data that leads to lacking of precise measures. For FOQA data alignments, the pattern finding probability is approximately 55.13%. An empirical system and procedure for pattern searching is needed to handle a population of data. The hidden patterns were found in both cases and the concept of data homology was illustrated. |
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