Conference proceeding
APPLICATION OF SUBSPACE-BASED BLIND IDENTIFICATION METHOD IN STRUCTURAL SYSTEMS
13 WCEE: 13th World Conference on Earthquake Engineering Conference Proceedings
01 Aug 2004
Abstract
A subspace-based blind system identification algorithm developed in the communications area by Moulines et al. [1] is introduced into structural dynamics problems. The approach requires at least two recorded/measured data series at different locations of the same structure or at different structures subjected to the same seismic excitation. The technique does not require any prior information about the characteristics of the structure(s) and the input excitation. The subspace-based blind identification scheme constructs a Sylvester matrix from the second-order statistics of the output data, and applies eigenvalue decomposition to the matrix. The impulse response functions of the structure(s) can be identified from the signal subspace or the noise subspace. After the impulse response functions have been identified, the unknown input excitation can also be reconstructed through equalization. The performance of the subspace-based blind identification method in structural systems is illustrated with three examples of simulated data: it is shown that the technique can identify the structural impulse response functions and reconstruct the input excitation with high degree of accuracy in both time and frequency domains.
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Details
- Title
- APPLICATION OF SUBSPACE-BASED BLIND IDENTIFICATION METHOD IN STRUCTURAL SYSTEMS
- Creators
- Songtao LiaoAspasia Zerva
- Publication Details
- 13 WCEE: 13th World Conference on Earthquake Engineering Conference Proceedings
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- [Retired Faculty]; Civil, Architectural, and Environmental Engineering
- Identifiers
- 991021957265204721