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• W1981126972 abstract "Today's structural monitoring systems include hundreds of data channels. The number of channels on these systems is expected to grow as sensors become more affordable, creating large computational requirements for the online modal identification of structural systems. This paper presents the mathematical formulation, numerical and experimental validation of a new fast mode identification (FMI) technique for online monitoring. The FMI technique uses experimental data from ambient vibration tests to identify operational mode shapes at a fraction of the time used by traditional modal identification techniques. The method focuses on identifying operational mode shapes at a particular frequency, allowing the modal identification method to be broken down in two steps: (i) identification of natural frequencies and modal damping ratios, and (ii) identification of mode shapes. Dividing the process in two reduces the computational time required by the algorithm. Numerical simulations show that the FMI is robust to the presence of noise in the signals. Experimental results show a good agreement between the results of FMI and those of other widely used modal identification methods. However, FMI shows a higher consistency on the identified modal coordinates and lower processing time than other methods. FMI is envisioned to be used in online monitoring systems with a large number of sensors. FMI can also be used on wireless sensor networks where available processing time and battery life might be limited. Copyright © 2010 John Wiley & Sons, Ltd." @default.
• W1981126972 created "2016-06-24" @default.
• W1981126972 creator A5014010144 @default.
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• W1981126972 date "2010-03-09" @default.
• W1981126972 modified "2023-10-01" @default.
• W1981126972 title "Fast mode identification technique for online monitoring" @default.
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• W1981126972 doi "https://doi.org/10.1002/stc.381" @default.
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