| 研究生: |
李勝源 Shin-Yuan Lee |
|---|---|
| 論文名稱: |
結構系統動態行為之系統建模與識別 |
| 指導教授: |
張江南
Chiang-Nan Chang |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 畢業學年度: | 88 |
| 語文別: | 中文 |
| 論文頁數: | 116 |
| 中文關鍵詞: | 系統建模 、系統識別 、結構動力 |
| 外文關鍵詞: | System Modeling, System Identification, Structural Dynamics |
| 相關次數: | 點閱:12 下載:0 |
| 分享至: |
| 查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
建築物等之大型結構,無法利用激振器做為模態測試之輸入外力。傳統頻譜分析方法只能得到系統的自然頻率、阻尼比及模態振形,並不能建立系統的模型,而一般時域方法回歸分析求得的轉移函數模型在控制的應用上有其限制。
本文藉由地震加速度值為系統輸入,大樓的各樓層加速度值為輸出響應,利用觀測器/卡曼濾波器識別法及特徵系統實現法做單輸入單輸出及單輸入多輸出的系統建模與識別。建立之狀態空間模型,為可觀、可控之最小實現,能有效降階至適當的最小階數,去除因雜訊造成不正確的模態及對系統影響較小的模態,且不會造成系統失真及不穩定的情況。可用於模態參數之識別、預測系統受外力之動態行為與結構之主動控制。
以發生在民國八十五年三月五日之地震以及八十八年九二一集集大地震為實例,得到不錯的識別結果。
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