The industrial sector is heavily reliant on PID controllers for all sorts of automation needs. A control loop is a fundamental feedback mechanism that is put in place to bridge the gap between the measured process variable and the desired set-point. Controllers are used to apply the appropriate corrective efforts through interfaces called actuators that can drive the variable up or down. The controller applies the corrective effort in a loop, until the error is eliminated up to the desired accuracy.
Gordon Moore articulated his all-famous Moore’s Law surrounding computing performance over 50 years ago, and its no less than a wonder that the statement has stood the test of time. The semiconductor industry continues to enhance computing power into more confined spaces at shockingly lower prices, providing consumers with incredible number of benefits.
The Glove Unique Reprocessing Unit (GURU) built by Pentamaster, an automation provider in Malaysia is a perfect case study for observing such advancements in technology. In two of the seven workstations, the GURU system has allowed the company to halve the number of industrial PCs driving the machine-vision modules.
The Process Control Industry is heavily dominated by proportional-integral-derivative (PID) controllers, however even these marvelous components have their own limitations. The behavior of PID loops is difficult to understand, something which gets worse whenever a fault arises, and troubleshooting is required. Nonetheless, technicians & engineers strive to achieve coherence between the three building blocks of the controller, i.e. proportional, integral & derivative actions.