Building a PID Controller with LabVIEW and USB Data Acquisition Hardware

[TheMedinadenis]

what is the transfer function of the system?

[ladysman217f]

Hi Dave,

i was just wondering if there is code for this PID controller compatable with Labview version 8.5 because i followed the link above for the code and could not open it because i only have version 8.5. regards.

[zs0va]

How do you control batteries (if that is constant power supply, I assume 2x 1.5V), what kind of power transistor is that you using?

Thank you

Joe

[alpha001ful]

Hey how do you connect Op Amp to the the power supply and motor? Do we need extra resistors (i didn't see in the video)? Can you give me the circuitry ?

[GeankDOORS]

Hi, nice project, but what kind of sensor you were using and how did u place it?? -any schematic would be helpful- because I'm trying to do the same using an LDR and a red led as a light source but I'm not sure about how to put all together. thanks

[OndKrokus]

I can't add the VI to my project, does anyone else have this problem? I right-click, choose "Select a VI" and select "simple-pid.vi" and nothing happens, not even an error..

[FlexRIO]

@OndKrokus Hello. If you right-click on the block diagram and choose "Select a VI", you should be able to drop the "simple-pid.vi" sub-VI onto the block diagram and wire it up. It's possible you might need a newer version of LabVIEW.

[laskjdgx]

Great stuff! How much did the hardware cost you in total?

[azimahghazali]

Hey there, is there any limitation to this PID program? I calculated P and I parameter values of more than 5 (but output is only between 0-10V). I applied it to my system's approximate model (very close to actual response), and they work ok in MatLab simulation. But when i apply them to this PID program, my system oscillates very badly.

is there any factor difference between this program and the regular PID block in Matlab? Hope u can help me out. Thanks!

[19Mrstormy]

Is it possible to show a rough circuit schematic ??

[Celhucireth]

Excuse me wich USB Data Acquisition Hardware are you using?

[Celhucireth]

@Celhucireth forget it, i got it, its in the video, i did not hear it because i did not see it from the beginning

[texasdavew]

The analog output channel is connected to the base input of the transistor. This is a TIP120 darlington pair transistor. When you are looking at the transistor with the metal shield in the back, the base input is the pin on the left. Not all TIP120's are in this configuration so refer to the specifications to be sure. The next post on my transistor is the collector and the last is the emitter. The battery high goes into the collector and the output current comes out the emitter to the fan motor.

[felipesrt]

How did you wire the output signal to the transistor???

Thanks

[th3kid13]

great tutorial!

[EzarKun]

nice vid.

how to do ramping?

say 4.35 to 4.5 @ 0.1/second

thanks

[texasdavew]

Hope you found the video useful. You can find more like this - showing different DAQ functions and applications at patsvb77

[uksurd]

unbelievable ,, you did it in 9 mins and i am learning this thing data acquisition from past 1 month

[FlexRIO]

Hello,

All the code is available for download at the NI Community.

Search for "6211 application code"

The "Simple PID" function is used within the "PID Control" application.

[djbazzsta]

@FlexRIO What are the specific Labview Modules in use here?

If I go to Measurement I/O in the conventional Labview Student Version,

the DAQmx option does not appear even though the USB board is

connected.

[FlexRIO]

@djbazzsta Hello. It appears that you probably don't have the NI-DAQmx driver software installed. Installing that will install LabVIEW support, and add the DAQmx option in the Measurement I/O pallet. This dosen't require any speacial LabVIEW modules. You can download NI-DAQmx from ni.com.

[sheerazdarkshadows]

@FlexRIO i Cannot access 6211 application code. When I click on it, the page says 'Unable to load the web page because the server sent no data'. Have you deleted this code now?

[FlexRIO]

@sheerazdarkshadows Hello. 6211 application code is still up, so I'm not sure why it's not loading for you. Have you tried again recently? The link in the description section of this video seems to work fine.

[zubairhussain123]

Hi, where do u get the simple version of the PID module that you use?

[texasdavew]

Hi, we're using a TIP120 darlington pair transistor.

[joeasing]

man, can you tell me what kind of transistor are you using? i need a code. thanks :)

[imtalbert]

hey man, what kind of transistor are you using?

[Torb91]

awsome video man!! :D

[awhanp]

thanks thanks thanks :)