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

30.3 CONTROL SYSTEMS

 

· Control systems use some output state of a system and a desired state to make control decisions.

 

· In general we use negative feedback systems because,

  1. - they typically become more stable
  2. - they become less sensitive to variation in component values
  3. - it makes systems more immune to noise

 

· Consider the system below, and how it is enhanced by the addition of a control system.

 

 

 

· Some of the things we do naturally (like the rules above) can be done with mathematics

 

 

30.3.1 PID Control Systems