PID Control
4/30/2015 11:30:00 AM
Contol Engineering

GTH has many different control strategies and solutions for any control need. One option that we utilize frequently is the PID controllers from Watlow and Honeywell. PID control can be confusing but it is a really important control type in the industrial world. The PID controller algorithm involves three separate constant parameters, and is accordingly sometimes called three-term control: the proportional, the integral and derivative values, denoted P, I, and D. Simply put, these values can be interpreted in terms of time: P depends on the present error, I on the accumulation of past errors, and D is a prediction of future errors, based on current rate of change. The weighted sum of these three actions is used to adjust the process via a control element such as the position of a control valve, a damper, or the power supplied to a heating element. 

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Categories: Automation

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