Nâng cao hiệu quả nhận dạng các tham số dao động dựa trên kỹ thuật tách nguồn mù

Blind source separation (BSS) based identification methods draw increasing attention as an alternative tool for operational modal analysis. However, their implementation is rare in literature, especially in cases where the number of sensors is limited (the underdetermined problem) or harmonic excitations are involved. This paper proposes an enhanced modal identification procedure based on the BSS technique to handle even the underdetermined problem or the presence of harmonic excitation. Numerical simulation and experimental example show that whether in determined situations or the presence of harmonic excitation, the proposed method performs accurate and robust identification.