| タイトル | Comparison of several system identification methods for flexible structures |
| 本文（外部サイト） | http://hdl.handle.net/2060/19910012261 |
| 著者（英） | Longman, Richard W.; Lew, J.-S.; Juang, Jer-Nan |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1991-03-01 |
| 言語 | eng |
| 内容記述 | In the last few years various methods of identifying structural dynamics models from modal testing data have appeared. A comparison is presented of four of these algorithms: the Eigensystem Realization Algorithm (ERA), the modified version ERA/DC where DC indicated that it makes use of data correlation, the Q-Markov Cover algorithm, and an algorithm due to Moonen, DeMoor, Vandenberghe, and Vandewalle. The comparison is made using a five mode computer module of the 20 meter Mini-Mast truss structure at NASA Langley Research Center, and various noise levels are superimposed to produced simulated data. The results show that for the example considered ERA/DC generally gives the best results; that ERA/DC is always at least as good as ERA which is shown to be a special case of ERA/DC; that Q-Markov requires the use of significantly more data than ERA/DC to produce comparable results; and that is some situations Q-Markov cannot produce comparable results. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 91N21574
NAS 1.15:104046
NASA-TM-104046 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/133121 |
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