04-06-2014 10:55 PM
To whom it may concern,
I am currently flying rocket's to see the effect of thrust modulation by moving a steel puck up and down to control thrust. This puck is moved up and down by a servo which is operated by a a self contained PWM signal I made in labview. I then turned this VI into a RT application for a myrio. The PWM signal is controled through a self made PID which prior to that is made by comparing onboard accleration of an acclerometer with a Upon ddoing this i flew the rocket today but upon checking the onboard data on board after flight(I used ignal express) all my files were zero. I was saving the PWM SIGNAL, system error, and onboard accleration.
Obviously on a rocket flying up does not result in zero, so can someone please tell me what i'm doing wrong, is the code wrong or am I saving wrong? I've attached the following VI and below show's picture of the code I made. Any help is greatly appriciated as rocket motor's aren't they cheap and I hope to fly tuesday.
04-07-2014 03:17 PM
Does the application log data correctly when run in interactive mode? Do you other Write to Measurement File VIs work as expected?
I also noticed that the top loop has no wait in it which may cause it to log repetitve data very quickly. Can you add a wait or place the Write to Measurement Files into another one of the already existing loops?
04-07-2014 03:32 PM
The strain gauges I had saved, saved correctly half way then went to a back up file system, which is another issue i'm trying to peice together.
04-08-2014 01:12 PM
I think it would be beneficial to reduce the number of files being generated and possibly simplify the writing process.