LPC MicrocontrollersのトピックRe: PI Controller

PI Controller

leoncorleone — Fri, 03 Feb 2017 07:56:45 GMT

Hello to all. First sorry for my poor English.
I have a question.
Actually I'm controlling speed of DC motor by LPC1768 and I need to a PI controller like below picture.

How could I program a PI controller in Keil. Is there any library for it, if not, what can I do?
Very thank you.

Re: PI Controller

soledad — Fri, 03 Feb 2017 22:34:52 GMT

Hi Leon,

The DSP library for LPC1700 devices includes the below functions as you can check in the application note AN10913 http://www.nxp.com/documents/application_note/AN10913.pdf :

Biquad filter
Fast Fourier transform
Dot product
Vector manipulation
FIR filter
Resonator
PID controller
Random number generator

For PI controller you need to implement your own algorithm, please check the following references.

http://www.idc-online.com/technical_references/pdfs/civil_engineering/Universal%20Controller.pdf

Feedback control system based on a remote operated PID controller implemented using mbed NXP LPC1768 development board -…

I hope this helps.

Have a great day,
Sol

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Re: PI Controller

rons — Thu, 16 Feb 2017 18:16:33 GMT

Just search for the article "PID without a P.H.D.". It is also on embedded.com.

A PI controller is something you can do yourself with very little effort.