Close loop control

[sergueiK]

I will try to describe what I am doing in my application:

I have electro-mechanical vibrator powered by amplifier.

I feed amplifier from signal generator(in that case from NI9263) and read signal from accelerometer(through NI 9233).

I need to stabilyze amplitude of vibrations as there is some drift with time.

I have used some examples I found to create VI.

By some reason when I put both into one while loop it does not generate signal.

Could you, please take a look and give some comments on it.

Currently I am stuck on this close loop control.

I would like to stabilize amplitude within 1%. What is the best way to do it?

[BeejalS]

Hi

I have had a look at the program that you posted and the reason that it doesn't work when you put the two programs into one loop is because of the following; you are doing the Acquisition from the accelerometer using the high level DAQ assistant and the signal generation from the 9263 using the low level DAQ functions. I would suggest performing both operations using the low level DAQ functions and therefore changing the code that you are using for the acquisition.

I would also suggest looking at some examples in the NI example finder that show how to implement a control loop using the DAQ vi's. This will give you a good starting point. You can find these examples by browsing to Hardware Input and Output>>DAQmx>>Control>>General in the NI Example Finder.

I hope this helps.

Regards

[sergueiK]

Thanks a lot Beejal,

I will take a look later into this low level DAQ functions. So far I have application that works.

Sergey.