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題名 | A Study for Inverse Estimation of Output Strength and Flow Visualization of Burning Rate in the Zr-Ni Type Alloy Delay Compositions=鋯鎳合金系延期藥輸出強度逆向估算及燃速視流化之研究 |
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作者 | 葛揚雄; | 書刊名 | 中正嶺學報 |
卷期 | 41:2(A) 2012.11[民101.11] |
頁次 | 頁51-66 |
分類號 | 595.94 |
關鍵詞 | 輸入估算法; 熱通量; 延期藥; Input estimation method; Heat flux; Delay compositions; |
語文 | 英文(English) |
中文摘要 | 本文利用細式熱電偶量測鋯鎳合金系延期藥(鉻酸鋇/過氯酸鉀/鋯-鎳(70/30)/鋯-鎳(30/70):60/14/9/17)末端輸出強度熱源作用在薄銅片上之背面暫態溫度曲線,再藉由卡爾曼濾波器(Kalman filter)及適應性權重遞迴式最小平方估測器兩者組成之輸入估測法,針對鋯鎳合金系延期藥末端輸出強度之未知時變熱通量進行線上逆向估算。卡爾曼濾波器藉由薄銅片背面之量測溫度,可逆向估算作用在薄銅片正面上之未知熱源強度並避免發散問題;遞迴式最小平方估測器則藉由濾波器產生之剩餘值更新序列遞迴地計算輸入系統之鋯鎳合金系延期藥末端未知時變熱通量。由實驗及逆向估算結果進行分析探討,顯示建立在線上遞迴式計算結構上之輸入估測法,可穩固、精確及即時地估算出逆向熱傳導問題中之延期藥輸出強度。本文亦以實驗方法研究並運用視流技術建構鋯鎳合金系延期藥性能量測實驗設備,探討火焰傳播隨時間變化的影響,可作為改良國軍現行使用火砲延期裝置及內彈道性能控制之參考。 |
英文摘要 | This study presents an on-line inverse method based on the input estimation method formed with both the Kalman filter and the adaptive weighted recursive least squares estimator to estimate the unknown time-varying heat flux at the end of the Zr-Ni type alloy delay compositions (BaCrO4/KClO4/(Zr-Ni)(alloys): 60/14/9(70-30)/17(30-70)) from the transient temperature curve measured using a fine gage thermocouple on the rear of a thin copper disk. The Kalman filter can inversely estimate the unknown heat source strength using the measured temperature on the outer surface, thereby avoiding the divergent problem. The recursive least squares estimator uses the residual innovation sequence from the filter to recursively compute the magnitude of the unknown time-varying heat flux. The results show that this input estimation method structured using the on-line recursive calculation can estimate the unknown time-varying heat flux stably and accurately in inverse heat conduction problems in real time. The research is also based on experimental method to construct a delay-performance-measuring facility by using the flow visualization technique. We discuss the characteristics of flame propagation along with time. The results can be used to optimize the delay device in gun of current army and the control of interior ballistic performance. |
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