PI (D) anti-windup values how to give?

Hello

I have an old PI control system written in ANSI C, no source code available. However, in the old manual system, the P, D(=0) values and I gives us, and also the 'full liquidation of the control threshold"values, like + 300, - 300.

I've already implemented PI control using the given P and I win values in LabView2010 with the PID module. My question is, how can I implement the anti-windup data values? What I cut and change the PID vi inside, what comes with the add-on? Or there is a better way to do it?

Thank you very much!

Hello

If you specify the "output" range to be 300 + and -300, the PID algorithm has an anti-windup already install in the algorithm that would apply this function on your command output.

Now, this assumes that the anti-windup algorithm uses the same limits for output control. If this is not the case, you really need to change the code internal to what you need.

Also note that when the parameters of transfer from one system to another, the implementation might differ considerably as previous controller use full Gain in seconds while the PID toolkit uses the full time in a few minutes, which means that you can not just plug these numbers directly. The best way to make the system work again is to actually use the new PID algorithm in LabVIEW and retune controller again. Since you have only a regulator PID, you should be able to tune a time step.

Please let me know if you have any other questions.

Tags: NI Software

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