Output-Only Modal Estimation Using Eigensystem Realization Algorithm with Nonstationary Data Correlation

The conventional eigensystem realization algorithm with data correlation (ERA/DC) combines the impulse response or free of a structural system concept function to identify modal parameter system. Previous studies have shown that parameters systems subjected stationary white noise excitation can be estimated by ERA/DC from ambient without data. This is extended in this paper for output-only identification complex modes under as nonstationary process form product model. Numerical simulations and experimental verification are used validate effectiveness proposed method response-only estimation, stabilization diagram assurance criterion (MAC) distinguish fictitious modes.