Operational Modal Analysis by Siu-Kui Au

Author:Siu-Kui Au
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

Example 7.3

(Asynchronous data) Consider three channels of data from accelerometers measuring the same horizontal acceleration of a SDOF structure with a natural frequency of about 9.85 Hz under ambient condition in the laboratory, as schematically shown in Fig. 7.17. Channels 1 and 2 were recorded on the same DAQ unit but Channel 3 was on another unit. Although the digital data of all channels were transmitted by USB cable to the same laptop and operated by the same software to start recording at the same time, only the data from Channels 1 and 2 were synchronized. The data was acquired for one hour at 2048 Hz and later decimated to 256 Hz for analysis.

Fig. 7.17Experimental setup in Example 7.3

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.