제어로봇시스템학회:학술대회논문집
- 2000.10a
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- Pages.150-150
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- 2000
Structural Dynamic System Reconstruction for Modal Parameter Estimation
- Kim, H. Y. (CPG, Agency for Defense Development) ;
- W. Hwang (Pohang University of Science and Technology (POSTECH))
- Published : 2000.10.01
Abstract
We as modal parameter estimation technique by developing a residual based system reconstruction and using the system matrix coordinate transformation. The modal parameters can be estimated from and residues of the system transfer functions expressed in modal coordinate basis, derived from the state space system matrices. However, for modal parameter estimation of multivariable and order structural systems over broad frequency bands, this non-iterative algorithm gives high accuracy in the natural fre- and damping ratios. From vibration tests on cross-ply and angle-ply composite laminates, the natural frequencies and damping ratios on be estimated using tile coordinates of the structural system reconstructed fro the experimental frequency response. These results are compared with those of finite element analysis and single-degree-of-freedom curve-fitting.
Keywords
- system reconstruction;
- parameter estimation;
- frequency response function;
- natural frequency;
- damping ratio;
- vibration of composite laminates