| Autor: |
M. Thothadri, R. A. Casas, F. C. Moon, R. D'Andrea, C. R. Johnson Jr. |
| Zdroj: |
Nonlinear Dynamics; May2003, Vol. 32 Issue 3, p307-322, 16p |
| Abstrakt: |
A nonlinear system identification methodology based on the principle of harmonic balance is extended to multi-degree-of-freedom systems. The methodology, called Harmonic Balance Nonlinearity IDentification (HBNID), is then used to identify two theoretical two-degree-of-freedom models and an experimental single-degree-of freedom system. The three models and experiments deal with self-excited motions of a fluid-structure system with a subcritical Hopf bifurcation. The performance of HBNID in capturing the stable and unstable limit cycles in the global bifurcation behavior of these systems is also studied. It is found that if the model structure is well known, HBNID performs well in capturing the unknown parameters. If the model structure is not well known, however, HBNID captures the stable limit cycle but not the unstable limit cycle. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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