The popularity and wide use of PID controllers can be attributed partly to their robust performance in a wide range of process control applications and partly to their simplicity to use, which allows engineers to operate and tune them in a simple, straightforward manner. What Are PID Controllers? PID control is the most commonly used control algorithm, used extensively in industrial, process, and commercial applications and has been universally accepted as the easiest and perhaps the best control algorithm, resulting in precision control of a plant. Thirdly ON/OFF control is usually based on using a relay and the relay has to switch many times thus shortening its lifetime.

Secondly, it is very difficult to control plants with time delays using ON/OFF type control. For example, in an ON/OFF temperature control the measured temperature shows an oscillatory behaviour and can be several degrees above or below the desired value. Firstly, the error is never zero and as a result precision control of the plant is not possible. In simple ON/OFF control applications full power is applied to the plant if the error is positive, otherwise, power is removed. Both control algorithms use feedback where the output response of the plant is compared to the desired value and an action is taken to minimize the error between the two. Basically, two types of control algorithms are used in process control: ON/OFF control and proportional integral derivative (PID) control. Industrial and commercial process control are very important fields of automatic control engineering.

Pid regulyator na arduino