28
Rockwell Automation Publication 1441-UM003A-EN-P - May 2011
Chapter 2
FRF Frequency Response Function Extension Module
Importing to ODS Analysis
Software.
Operating Deflection Shapes (ODS) analysis is used for determination of the
vibration pattern of a structure under certain operating conditions. Vibration
measurements can be performed at different locations and in different directions
on a structure and the vibration pattern can be shown as an animated geometry
model of the structure or listed in a shape table.
An ODS is a combination of the forcing function acting on the structure and the
dynamic properties of the structure. The forcing function depends on the
operating conditions, which for machinery could be influenced by, for example,
engine speed, load, pressure, temperature and flow. Ambient forces from waves,
wind and traffic may also apply for civil engineering structures.
You can import measurements taken by the FRF extension module into ODS
analysis software such as Vibrant Technology, Inc.’s ME’scopeVESTM.
Follow these instructions to import FRF data into analysis software.
1.
Collect data using the FRF extension module.
2.
Create a an FRF Data folder on your computer.
3.
Connect the instrument to your computer using the supplied USB cable.
For information about the USB cable and ActiveSync, see the Dynamix
2500 Data Collector User Manual, publication
4.
Start an ActiveSync session.
5.
In the ActiveSync window, select Tools > Explore.
6.
Browse to the \Internal Disk\FRF folder on the instrument.
This is where the Frequency Response Function module data is stored.
7.
Select the appropriate data file (*.csv) readings.
8.
Copy the data files into the FRF data folder you created on your computer.
9.
Select all the (*.csv) files and import them into the ODS analysis software.
TIP
The import function in the ODS analysis software may refer to
Data Block or DI-440 FRF’s (*.csv) file formats.
