Control Systems An Overview Computer Integrated Manufacturing 2013

Control Systems An Overview Computer Integrated Manufacturing © 2013 Project Lead The Way, Inc.

Definition A control system is a device or set of devices that are coordinated to execute a planned set of actions.

Video Game Controller • Remote is handled by user (you) – Input is sent to game console and processed • Output / data is sent to monitor • Feedback appears on screen – Output is viewed as visual feedback

How Video Game Controller Works Input Device is manipulated Input Processing Sensor read Reading processed Feedback on monitor Game responds Output Typical Closed Loop Process Input Process Feedback Output

Music Player • What is the input for increasing the volume? • What is the process? • What is the output? • What is the feedback?

Music Player • Controls operated by user and signals sent to device • Request is processed by device and desired conditions are set • Volume strength is increased • Feedback is heard through headphones by user

How It Works Device is manipulated Sensor read Feedback through headphones Player responds Typical Closed Loop Process Input Process Feedback Output Reading processed

Open and Closed Loop Open Loop Control System – Sprinkler System • No direct connection between the output of the system and the conditions can be controlled • Cannot compensate for unexpected forces Closed Loop Control System – Refrigerator Light Sensor • Provides the system with operation feedback • Can compensate for conditional changes – Thermostat • Heating or cooling equipment is actuated based on the temperature sensed

Image Resources Microsoft, Inc. (2008). Clip Art. Retrieved from http: //office. microsoft. com/en-us/clipart/default. aspx