Electronics > Projects, Designs, and Technical Stuff

Motion control, S-curves and other stuff >> controlling lift with DC motor

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krisRaba:

--- Quote from: IconicPCB on October 10, 2019, 10:16:53 am ---For the adventurous spirits forget PID nonsense... go straight to take back a half algorithm for those dificult to control processes.

--- End quote ---
What do you mean exactly? Any suggestions?

IconicPCB:
Enjoy

krisRaba:
Are you one of the authors? ;)

IconicPCB:
No.

I have however been interested in applying this algorithm for a while.

So far I have had good success with PID with Feed forward in conjunction with incremental set point in a situation where conventional PID did not perform terribly well.

The point to recognise is the micro provides a lot of flexibility so that the control strategy is no longer limited to prior art.

krisRaba:
How exacly is feed-forward implemented in such situations? Is it some kind of OUTPUT = FF_VAL_CALCULATED_FROM_WHATEVER + PID_OUTPUT? And PID checks SP versus PV with such side-channel under hood, so PID only reduces error in FF_VAL_CALCULATED_FROM_WHATEVER estimation of output, and not full range of OUTPUT?

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