07-09-2009 04:32 AM
Hi all,
I have a VI that outputs voltage function in either a sinusoidal or ramp form to the 9263 which is used to drive two piezo actuators. For the most part, the VI works the way i want it to. The problem is that there seems to be significant fluctuations in the data. I have tried putting a generic filter sub VI in the VI but this doesn't seem to help as it just smoothes out the edges of the dat, which is not the desired effect i want.
I have attached a copy of the VI and an image which shows one of the filtered and unfiltered data sets.
Any ideas or suggestions on how i can fix this will be greatly appreciated.
- msmartei
07-10-2009 09:04 AM
Hi,
can you please give some more information about what "significant fluctuations in the data" does mean?
Thanks
M. Brauner NIG
07-10-2009 09:45 AM
You showed two versions. What is wrong with the data shown there? Can you show a graph (perhaps with simulated data) which displays what you want the output to look like?
Lynn
07-13-2009 04:52 AM
I cannot quantify significant fluctuations per se but when i expect the voltage at both channels to be zero, i normally get vacillating readings. Granted the scaling has something to do with it, i have attached a picture of the unfiltered data when i expect a flatline at zero.
In terms of how the data should look, the jagged steps are expected but at each step, i want the lines to be as horizontal as possible. This is what im hoping to achieve with a filter.
I look forward to your responses,
Msmartei
07-14-2009 03:51 AM
Hi, can you tell me please your exact setup, including wiring for this measurement?
thank you
M. Brauner NIG