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richie81

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About richie81

  • Rank
    LAVA groupie

LabVIEW Information

  • Version
    LabVIEW 2009
  • Since
    2009
  1. Hi Shaun, It was definitely financial reasons that I chose the 12v dc pump (I bought it on ebay for 20euro:P)! Otherwise I probably would have tried to get a 3 phase or something like that. Anyways, as it turns out I'm finished - I had my project presentation Wedsnesday afternoon. It went very well - I got the PID & PWM working, thanks to the help of my project supervisor during the presentation (it was a pretty informal affair!). I wasn't far off, thanks to all the information from you and this site but it was just putting it all together in labview where I fell down. We ended up using
  2. Hi Shaun, I'm sorry, my submission deadline is soon enough, so I've been a bit naive with this expecting everything to fall into place in a short space of time... That's not going happen... My pump is just on-off, 12v dc. An analogue controlled pump would probably have been a sounder option, at least when working with labview. I realize that now... I have the PID toolkit, so I'll have a look at the 'PID simulator' and the other examples like you said. I have attached the main program & sub vi's. I've also attached the basic program that I started off with(minus PID & PWM) & a
  3. Hi Shaun, Thanks a mil for all the help - I'd be lost without it:worshippy:! I've attached my vi with the PID & PWM subvi's added in. I'm sure that it'll be wrong somewhere but I'm going to try and tune the PID controller tomorrow and see can I get some sort of response... When it comes to the PID tuning, I spoke to my project supervisor from the college & he said that I would need to work out my values by the 'plant response' method...? Leaving Ki & Kd at zero, he said to 1st get; Kc = % change in voltage shift of my output
  4. Thanks everybody for all the help and advise:rolleyes:! I'm going to focus on trying to make my process work with one of two programs; 1 - My initial program with the on-off controller added in(cheers anon), 2 - An edited version of the FPGA PID PWM program(thanks for pointing that out Shaun). I've run into a bit of a snag with wiring my DAQ assistant Ai/p and Do/p into the FPGA program... My analog input subbed in nicely into the PID loop, but in the PWM generation loop there are 2 terminals to wire into my digital output(direction bit & PWM output), where as I only have one digital o
  5. Hi, I am wondering does anyone know the best way to work out my P, I and D values for my level control project? Basically I am using a subvi called simplePID which I found on the NI website. I have two DAQ assistants in my program - one configured as an analog input (this input is from a cistern arm turning a pot which will determine the level of my test tank), and the other is configured as a digital output driving a pump. I havnt tried to use this program with my hardware yet due to my lack of understanding of PID and tuning the controller. I have read up a bit on manual tuning and the
  6. Hi, I'm looking for a bit of help with code for a Level Control project using a USB 6008. Basically my project consists of a reservoir and test tank. The test tank has a cistern arm turning a pot for my analog input. I have a 24vDc pump which is to be controlled by a Pulse Width Modulated Digital output. I'm not that familar with PID control or labview code for that matter, but ideally if I could achieve some form of PID that would be great!! As of now, I have a program for my cistern arm, where I configured a DAQ assistant as an analog input. This VI basically simulates where the
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