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This work introduces a novel estimation technique for vibration frequency and damping estimation, based on Pade approximants, and using time series taken from large structures. The algorithm is based on convergence properties of Pade approximants that assures the existence of real poles representing the sinusoidal components of the signal, and a remarkable distribution of stray poles and zeros, resulting from the approximant overdetermination. Its statistical behavior is analyzed through numerical experiments and an application for a real structure is provided as example.

Uso de aproximantes de Padé na estimação de parâmetros modais em estruturas de grande porte.