Any P.I.D. experts in the crowd?

[generator12]

I know this is a long shot, but I'm looking for a good video which demonstrates a PID control system at work. I will be explaining the fundamentals of PID control to a group of people in a couple of weeks using a PowerPoint presentation.

But I don't have access to a good demonstrator and am hoping to illustrate the very basics somehow. Any ideas/suggestions are welcome.

 

[jimbo_jwc]

Re: Any P.I.D. experts in the crowd?

Google Search PID Loop in the more tab /Videos . Alot of stand alone controllers will auto tune if you have to program than you must understand . What P , I, D mean and how you system reacts .

 

[generator12]

Re: Any P.I.D. experts in the crowd?

Google Search PID Loop in the more tab /Videos . Alot of stand alone controllers will auto tune if you have to program than you must understand . What P , I, D mean and how you system reacts .

Jimbo, I get that. But I'm looking for a video which illustrates the concepts of PID control - i.e., choosing a set point, the controller reacting to an error and adjusting the output in the correct direction, and the functions of integral and derivative. Tuning is a distinct function, but as you say, it requires understanding on the part of the person doing it.

The seminar I'm teaching cries out for a small demonstrator - controller, process, valve or some such, and measurement indicator. But I don't have time to rig one up. Therefore I'm hoping to find a video that illustrates it.

 

[Nickypoo]

Re: Any P.I.D. experts in the crowd?

Perhaps putting them through a few semesters of calculus would help.

Other than that I am of no use.

 

[roscoe]

Re: Any P.I.D. experts in the crowd?

PID Control Demonstration - YouTube

Agile Ball and Plate System - YouTube


P vs PID control - YouTube

 

[Tim Frank]

Re: Any P.I.D. experts in the crowd?

Order one of these and build a simple demo?
http://www.auberins.com/index.php?main_page=index&cPath=1


A picture may be a worth a thousand words, but a good demo is worth a thousand pictures.

 

[dingbat]

Re: Any P.I.D. experts in the crowd?

What are you trying to demonstrate that can't be done using a block diagrams?

I have an 87 page PPT presentation on process control that I use for prospective customers. Includes discussions on control loops and functions, block diagrams, system architecture, advanced presets, cascade control, etc. Unfortunately, is proprietary information and I can’t distribute.

Good luck with your search

 

[jimbo_jwc]

Re: Any P.I.D. experts in the crowd?

Order one of these and build a simple demo?
PID Controllers : auberins.com, Temperature control solutions for home and industry


A picture may be a worth a thousand words, but a good demo is worth a thousand pictures.

Yep the Control loop tunes different from cold/inital start up to loading values /Running and you need to find happy medium so you don't wear out equipment controlling devices . Now with all VSD Motors they try to do what Valves did.

 

[generator12]

Re: Any P.I.D. experts in the crowd?

What are you trying to demonstrate that can't be done using a block diagrams?

I have an 87 page PPT presentation on process control that I use for prospective customers. Includes discussions on control loops and functions, block diagrams, system architecture, advanced presets, cascade control, etc. Unfortunately, is proprietary information and I can?t distribute.

Good luck with your search

Ding, I can illustrate it with powerpoint figures - been doing that - but they don't move. I'm looking to animate the presentation. Thought I could find a video that could do it, but no luck yet. I'll work something out.

Thanks to all who made suggestions.

 

[roscoe]

Re: Any P.I.D. experts in the crowd?

Don't the videos I posted above, demonstrate PID?

THe air tube video introduces outside influences.

There are many more to choose from on youtube.

 

[glenn property of pam]

Re: Any P.I.D. experts in the crowd?

if the people you are training can drive then the simplest way is i was shown was on the basics of a car on a road with hills. The basics of maintaining speed by calculating the error (set speed), the concept of seeing a hill then judging a error (speed) of the future based on the errors (speed loss or gain) of the past in the same situation. Then all you need is to add the concept of the time between the throttle changing and time before a reaction can be measured against the error on both sides of the hill. Its more of dumb way to look at it which is why i found it easy to understand.

 

[generator12]

Re: Any P.I.D. experts in the crowd?

Roscoe, sorry for not commenting and thanking you.

Yes, they show the results of PID without a good description of how its accomplished. I can just as easily suggest something like the use of cruise control in a car to help people visualize similar results. Also, I'm going to avoid the mathematical representations of PID as these are not appropriate for the group I will be addressing - at least in the context in which it will occur.

I have been looking for something that shows a set point chosen, controller output increasing/decreasing to drive the process to the set point, and the existence of control offset (proportional only). Then introduce integral and watch the offset disappear. Increase proportional gain to create instability; then introduce derivative to control it.

I've seen video clips over the years on YouTube and others which have covered different topics with this sort of specificity and hoped to find one on this topic. So far no luck though.

Thanks again for trying.

 

[Tim Frank]

Re: Any P.I.D. experts in the crowd?

How about :
What Is a PID Controller? .... ??

 

[generator12]

Re: Any P.I.D. experts in the crowd?

Tim,

Nope. The videos are just ads.

Thanks.

 

[bigdee]

Re: Any P.I.D. experts in the crowd?

Why not purchase an inexpensive controller to demonstrate with?
If you go to this link you can download free software and manuals and plenty of reference material for your PP. I put together a PP (Open Office)for a class I taught at a local College that was geared for Industrial technicians. That was over ten years ago and if I can find it I will repost a free offer.
Automation Direct is a great company and I have purchased hundreds of thousands of dollars with them for great value based products and support.
Manuals for Temperature / Process Controllers

 

[roscoe]

Re: Any P.I.D. experts in the crowd?

I'm assuming you have access to suppliers of these systems. Have you contacted them for any demonstrators or videos they could lend to you?

Just a thought.

 

[generator12]

Re: Any P.I.D. experts in the crowd?

Bigdee and Roscoe, good suggestions. I hadn't thought of these ideas. I'll look into it further.

Thanks guys...!

 

[roscoe]

Re: Any P.I.D. experts in the crowd?

Allen-Bradley Retro Entabulator - YouTube


maybe?



Actually, AutomationDirect has a video library, but may be a bit much
for your presentation, and the demo video ( # 11 ) is poor.

Learn.AutomationDirect.com - PLC Tutorials