DI controller vs no controller

[Sam Groves]

If we use a DI controller the error doesnt get better.Regarding the error it is the same as we didnt have any controller at all.But does the DI controller improve the recovery time or not to not having any controller at all?

 

[BvU]

Hi,

Can you please read your post and agree that telepathy is required to make sense of it ?
Do present us with a complete case instead of leaving us guessing ...
Thanks !

##\ ##

 

[Baluncore]

If we use a DI controller the error doesnt get better.

Maybe you have forgotten the P of PID.
In your case, being proportional may be important because there is an I or D, inherent in the control loop.
The right answer will be obvious, once you know the right question.

“The only interesting answers are those which destroy the question”. —Susan Sontag

 

[Sam Groves]

Hi,

Can you please read your post and agree that telepathy is required to make sense of it ?
Do present us with a complete case instead of leaving us guessing ...
Thanks !

##\ ##

What do you mean?

 

[Baluncore]

What do you mean?

What are you trying to control ?

 

[Sam Groves]

Hi,

Can you please read your post and agree that telepathy is required to make sense of it ?
Do present us with a complete case instead of leaving us guessing ...
Thanks !

##\ ##

What do you mean

What are you trying to control ?

A 1st order ot a 2nd order system.

 

[phinds]

Given the great specificity of your posts, I'm confident that the answer is something, something, something.

 

[Baluncore]

A 1st order ot a 2nd order system.

This is like extracting teeth.
OK. Let's start at the beginning.
Was your failed attempt at a DI controller, implemented in software, in analogue electronics, or in something completely different ?

Later, we may ask, how you selected the time constants, or on what make and model hardware the controller runs. But let's not get ahead of ourselves, or we will not have all of January to think about it.

 

[Drakkith]

If we use a DI controller the error doesnt get better.Regarding the error it is the same as we didnt have any controller at all.But does the DI controller improve the recovery time or not to not having any controller at all?

Please provide more information. Currently no one has any idea what you're asking. Imagine we don't know what a DI controller is or what you're doing with it.

 

[DaveE]

This is the sort of subject where if you can't ask a question that experts can understand, you won't understand the answer.

Having said that, my general advice is to ditch the "D" part ASAP. It will just confuse you, and it's likely you don't need it anyway.

 

[Sam Groves]

This is the sort of subject where if you can't ask a question that experts can understand, you won't understand the answer.

Having said that, my general advice is to ditch the "D" part ASAP. It will just confuse you, and it's likely you don't need it anyway.

Yeah I agree I think PI controllers are the best.