Sparse component analysis (SCA) has been widely used for blind source separation(BSS) for many years. Recently, SCA has been applied to operational modal analysis (OMA), which is also known as output-only modal identification. This paper considers the sparsity of sources' time-frequency (TF) representation and proposes a new TF-domain SCA under the OMA framework. First, the measurements from th...

The building history of a cultural heritage and the after-effects induced by extreme loads such as earthquakes have durable impact on its modal parameters. This article aims to discuss peculiarities some parameters extracted from ambient vibration measurements in light complex Sant’Agata del Mugello. Romanesque church located Mugello basin (Tuscany, Italy) suffered many earthquakes, at least 15...

This paper presents the comparison of two different methods in the system identification. The experimental modal analysis and operational modal analysis are applied to a local structure of a storage/retrieval machine (S/R machine). The different vibration measurement approach and different theoretic analysis approach give us more information than only one approach. Through the result, the consi...

Masonry towers, located in seismic zones, are vulnerable and prone to damages up compromise their stability. The scatter of data on the mechanical properties masonry, geometry boundary conditions determine a lack building knowledge expected behaviour. Therefore assessment capacity represents critical task. This paper contributes issue analysis masonry focusing meaningful case study: St.Silvestr...

The field of Operational Modal Analysis (OMA) has recently become an emerging research interest. OMA, also known as Response-Only Modal Analysis, extracts the modal parameters by processing only the system response data. In many experimental measurement situations, the system’s output data series is short in length and buried under potentially correlated noise. In such cases, the separation of ...