Order Analysis Toolkit: Even angle reference signal processing

[Matthew_W]

 Hi dmertz,
 
 The Even angle reference (Analog Tacho) VI has been updated with the release of NI Sound & Vibration Measurement Suite v5.0. There is an upgrade option for migrating from OAT 2.1 to the NI S&V Measurement Suite v5.0 which cuts the upgrade cost significantly.

 I'm not sure what your referring to as the even angle reference sampling rate, there is only one sampling rate specified in this example as seen under the DAQ Configuration tab. Here's a screenshot of the updated example:
 


Please do post back if I'm misunderstanding what your referring to as the even angle reference sampling rate.

Best regards,

MatthewW
Applications Engineer
National Instruments


 

Message Edited by Matthew W on 09-18-2007 05:30 PM

[dmertz]

I appreciate you pointing me to the proper software package. 

What I meant by "even angle sampling rate" is the sampling rate that is being acquired.  This acquired data will be different from the "even angle reference" data.  If I record the even angle reference data using a certain sampling rate then try to acquire data at a different sampling rate, will I still be able to get a compensated even angle signal?  I think the answer is "no," but I'm not certain. Maybe I am misunderstanding something about how the even angle reference signal works. 

The reason I am using this example is that I am trying to record runout data to use with my other data sets.  I need to be able to subtract this runout from my other data files.  Am I on the right track?

Thanks for any clarification,

David

[Matthew_W]

 Hi David,

 To the best of my knowledge the even angle reference signal should be taken at the same sampling rate as the data. There are ways to resample the data to a different rate, these are mentioned in the OAT 2.1 toolkit help. The even angle reference data is taken at runtime, then the compensated signal is generated. The sampling rate is set one time in this VI, without changing it intentionally between reference and actual data then they should be the same.

Hope this helps, please post back if you need clarification on any points.

Have a great weekend.

Best regards,

MatthewW
Applications Engineer
National Instruments