Systems Thinking—Closed-Loop Systems
Closed-loop systems are found in many types of automated manufacturing processes. They ensure that desired outcomes are achieved—such as producing a high volume of goods of a consistent quality. This interactive activity describes the elements of a closed-loop system. An animation illustrates typical components and how signals control the operation of the system. The activity also allows you to compare the animation to a standard block diagram, which illustrates the various elements of a closed-loop system in a simplified form.
Click on the left to explore the interactive activity (requires Flash plug-in).
After going through the interactive, brainstorm a classroom activity that asks your students to diagram a closed-loop system. You may use the preceding interactive as an illustration and then choose one or both of the descriptions provided in Diagram a Closed-Loop System 
(PDF). Or, you may develop an idea of your own.
