Industrial applications of PID control

Abstract

The industrial PID has many options, tools, and parameters for dealing with the wide spectrum of difficulties and opportunities in manufacturing plants. Some of the options such as “dynamic reset limit” have existed for decades but the full value and applicability has not been realized. Also, the possibilities extend considerably beyond the original intent into improving process efficiency, operability, and compliance for sustainable manufacturing. A sustainable plant is defined as plant that is safe, clean, efficient, profitable, and compliant (Studebaker in Sustainable plant. PutmanMedia http://www.sustainableplant.com/ 2011). An enhanced PID developed for wireless measurements has been found to play an important role in providing a sustainable plant by inherently eliminating oscillations from a wide variety of sources including discontinuous and delayed responses in the automation system and interactions between loops when used with a threshold sensitivity setting and the dynamic reset limit. The advancements in new techniques and a greater understanding of existing capabilities enable the PID to not only improve loop performance but to individually optimize unit operations.