Introduction to Proportional Integral (PI) Control

Proportional Integral (PI) controllers are the most popular industrial applications of PID controllers. These controllers have no derivative component and typically have only 2 tuning parameters. Those tuning parameters are terms that enhance either the term that is proportional to the controller error or else the term that is proportional to the integral of the error.

[adamatepsilon]

5:45 this is a great explanation of the PI control. I was wondering what happens with the controller output when you need an output to keep the process at the setpoint, but the answer is that the integral terms is nonzero even if the error is 0.
So the I-component keeps the process at the setpoint even when the error is zero. I sort of knew the I-component, but not how it works in detail. Thank you.

[fahadfsd]

You are awesome, Very simple and clear explanation . Thank you .

[HarshitSharma-gcjb]

If the Control Period for a PI control is 1 sec., PID will compute Output every 1 sec. Does that mean Integral action will not be integrating output over a period of time as every sec it is only multiplying error with 1sec? (as mentioned in the DCS manual which I was working on, the integration of error is for the control period)

[bonhamgriggs]

Alright time to study
1x speed: Alright get to the point
1.5x speed: Yeah now were talking!
2x speed: WHOA NELLY

[gafo]

Thanks alot men, with your video and screenshot at 6:53, I can correctly tune a hammer mill for animal food !

[manuel_youtube_ttt]

But I can't really see any oscillations, I can only see the expected lag of 100 seconds. Am I missing something here?

[MoMadNU]

You are a very rare and truly outstanding educator. Thank You. I know this is an old video but I can't find an answer to my question. In a PI controller, do you ever reset the bias AFTER its been running for a long time? If I turn on cruise control at say 50 MPH then that's my bias and SP. If I then change the SP to 70 MPH I will get there and it will manage the load changes quite well. But what happens after a half hour at the same SP, 1 hour, 2 hours.. etc. Does the controller ever reset the bias to the current SP? What are the advantages/disadvantages of changing it ?

[asifnizamani]

sir what is bias can you explain such as here is moving bias

[Andersbendorff]

Where can i get a hold of your Excel worksheet? would be great if you would share it

[asifnizamani]

sir settling time from graph can't understand how to find A*0.05

[asifnizamani]

dear professsor can I make my own video after learning from youtube on same topec and same examples

[asifnizamani]

or we just consider that any controller hardware such as arduino or fpga can use software through pid

[asifnizamani]

there is an equation of pid but there is a hardware of pid

[pnachtwey]

This is yet another video teaching control as if it is black magic. Control is being taught the way it has always been taught by people that shouldn't be teaching control. The students are cheated.
What are the "special" cases where a PID is used? I know. I regularly use a PID with an added second derivative gain. Why would someone need to use a PID2?
Performance analysis topic sucks. What about ITAE, IAE or SSE?
Why have overshoot at all? How can the rise time be made smaller without overshoot?
I real life 5% error is not good. Neither is over shoot.