Home > Control System > CLASSIFICATIONS OF CONTROL SYSTEMS – Process Control

CLASSIFICATIONS OF CONTROL SYSTEMS – Process Control


Process Control

Process control refers to a control system that oversees some industrial process so that a uniform, correct output is maintained. It does this by monitoring and adjusting the  control parameters (such as temperature or flow rate) to ensure that the output product  remains as it should.

Figure 7  A closed-loop oven-heating system.

The classic example of process control is a closed-loop system maintaining a  specified temperature in an electric oven, as illustrated in Figure 7. In this case, the  actuator is the heating element, the controlled variable is the temperature, and the sensor is a thermocouple (a device that converts temperature into voltage). The controller  regulates power to the heating element in such a way as to keep the temperature (as reported by the thermocouple) at the value specified by the set point.
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