tank level control with PID

[KJAK]

 hi everybody 

i am designing a water level  controller (just the simulation using labview).

its a simple control system.

a water tank, an inflow and an outflow.

Inflow is manipulated to control the level

Given a setpoint, How can i control the level using a PID controller

If anyone have any examples or solutions of this problem, pls post it here

[Barp]

Hello,

Try to open the shipping example of LabVIEW PID and Fuzzy Logic Toolkit "C:\Program Files\National Instruments\LabVIEW 2009\examples\control\pid\prctrlex.llb\Simulation - Tank Level.vi".

This example demonstrates how to use LabVIEW to simulate the model and control with a PID algorithm. Also, consider using the LabVIEW Control Design and Simulation Module to better express the nonlinearlities of your plant with standard control block diagrams.

Hope this helps.

[Suse]

Hi KJAK,

could you solve your problem or are there any other questions on this issue?

Feel free to post.

Regards

Suse

[KJAK]

hallo,

Thanks for your answers but unfortunately I dont have  the PID toolkit, so can' t find the example 😞  have you  maybe some other solution

Thanks in advance

[LV_Pro]

You can create a basic PID controller using the math functions available in LabVIEW to perform the math operations of a PID controller. You will need to research PID, then construct the required calculations, either with native LabVIEW functions or with a Formula node. I'm not sure that a PID is required for a simple tank level control, basic feedback where some tank level measurement is used to control the in-flow, even semi-linearly, would be probably sufficient. PID controllers usually are in systems that have very dynamic responses, resonances, etc.