Integral control is an important method for control of systems.  Integral control is just slightly more complex than proportional control.  If proportional control won't do the job for you, you might want to consider integral control.  Integral control can produce a closed loop system with zero SSE, and that is a prominent reason for using it.

• Why learn about integral control?
• Integral control is a basic control method.  It is a member of the PID (Proportional/Integral/Derivative) family of control options.  However, to use it well you need to understand possibilities and limitations of integral control, and you need to understand it well for that.
• What should you know to learn about integral control?
• Before you can begin to learn about integral control, you should know about transfer functions (and laPlace transforms, Z-transforms, etc.)
• You should review the Final Value Theorem.
• You need to understand the general structure of a control system.
• You need to know about steady state error.
• What do you need to know about integral control?
• You need to know what integral control is.
• You need to know how to analyze integral control systems.
• You need to know how to implement integral control.
• How do you use integral control?
• Integral control can be implemented with analog controllers and digital controllers.
• What if integral control cannot be made to work well enough?
• There are other kinds of controllers including other kinds of PID Controllers, etc.
• Problems
• Click here for Problems on Integral Control.

        Here are some links to experiments you can do that will help you learn about integral control.