Is it possible to control servo system without integral action? Here is the method to control it with modified proportional action only;

 

http://hecoaustralia.fortunecity.com/digital3/ftsc3.htm

Without reading the link, I can say that yes, it is possible. Proportional gain only will work to some level of performance.

Is it possible to control servo system without integral action? Here is the method to control it with modified proportional action only;

 

http://hecoaustralia.fortunecity.com/digital3/ftsc3.htm

 

I too have not read the link, but it is absolutely possible, in general, to use p only, pd only, or pi only (though God help you with instability on this one). Modified proportional is simple and often used, for example, in box heaters for electronic instruments where a few degrees of steady state error is no big deal compared to the cost of a real pid controller.

 

A couple years ago, I built a two axis surgery table using hydraulic servos. Although I used pid, I put an off switch on the i so that, during the painstaking part of the surgery, the table would absolutely stay still wherever it was.

 

So, yes.

I too have not read the link, but it is absolutely possible, in general, to use p only, pd only, or pi only (though God help you with instability on this one). Modified proportional is simple and often used, for example, in box heaters for electronic instruments where a few degrees of steady state error is no big deal compared to the cost of a real pid controller.

 

A couple years ago, I built a two axis surgery table using hydraulic servos. Although I used pid, I put an off switch on the i so that, during the painstaking part of the surgery, the table would absolutely stay still wherever it was.

 

So, yes.

 

Isn't it a regulator?

Isn't it a regulator?

 

Sorry, I don't understand. What do you mean by regulator?