Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001

5.2.3 Differential Control

 

· When there is a sudden change in the system the differential controller will be able to compensate. But in terms of long term effects the controller will allow huge steady state errors.

 

· The control equation can be derived as,

 

 

· This larger the value of K the faster this controller will compensate for a change in the system.

 

· Try controlling the water tank level with the D controller,