A Poly-reference Implementation of the Maximum Likelihood Complex Frequency-Domain Estimator and some Industrial Applications

摘要

A poly-reference implementation of a maximum likelihood frequency domain estimator is proposed to estimate modal parameters and their confidence intervals from both Frequency Response Functions or from power-and cross-spectral densities in the output-only case. The solver is robust to measurement noise, since it uses the noise information on the data as a weighting in its cost function and can handle measurements with a large dynamical range. Several real-life civil, automotive and aerospace case studies are discussed.