continuous controllers vs. digital controllers

[senmeis]

Hi,

is it true, continuous controllers always have advantages over digital ones (less overshoot and undershoot, etc.) if both are fully optimized?

 

[KlausST]

No.

 

[brucesilver]

Hi,

is it true, continuous controllers always have advantages over digital ones (less overshoot and undershoot, etc.) if both are fully optimized?

Not necessarily! While continuous (analog) controllers can have smoother responses with less quantization error, modern digital controllers can be just as good (or even better) when properly tuned. Digital controllers offer flexibility, adaptability, and noise resistance, plus they can implement advanced control strategies like adaptive or predictive control. If both are fully optimized, the differences usually come down to sampling rate and processing speed—at high enough rates, a digital controller can closely mimic a continuous one. So it really depends on the application!

 

[danadakk]

An overview -

Continuous Time Signal and Discrete Time Signal | Difference, Diagram and Information - Electronics Projects

In continuous time signals, the signal is defined over an uninterrupted range of time. This means that the signal can take on any value at any instant of

electronicsprojects.in

Regards, Dana.

 

[FvM]

The question makes only sense if you are asking about an analog control system ("plant"). These days very few control systems are analog respectively dealing with time-continuous signals. Thus I wonder what's the application range of interest. As already mentioned, advanced digital controllers have features that can't be effectively implemented in the analog domain, I'd expect better performance of digital controllers in most applications. But does an analog controller fit your application at all?

 

[andre_luis]

continuous controllers always have advantages over digital ones (less overshoot and undershoot, etc.) if both are fully optimized?

The higher the sampling frequency, the more similar the transfer function will be, so the broad question as it stands is meaningless.