Tag Archive: controller+tuning control+structure integrating+processes process+dynamics system+performance runaway+processes

Jul
20

Freedom to Optimize PID Controller Structure – Part 2

The “Two Degrees of Freedom” structure functionally can give you the smooth transition online between 4 choices of PID structure. The user can adjust the set point weights for proportional action and derivative action between zero and one. If the set point weights are zero. there is no step or bump from a set point …

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Jul
14

Freedom to Optimize PID Controller Structure – Part 1

There are 8 different choices for controller structures in a modern DCS. Which one is the best for your application and does it take a download to change it? One choice is for integral only controller (no proportional or derivative action). The most common I-only control is a valve position controller (VPC) which is trying …

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