Using Percent Time in Normal to Uncover Tuning Issues
Even Simple Metrics Such as Percent Time in Normal Reveal Issues that Negatively Affect Performance and Signal the Need for Controller Tuning It’s easy to get tripped up if a shoelace
Using Average Absolute Error to Uncover Tuning Issues
Average Absolute Error (AAE) Provides an Intuitive Alternative to Variance and Simplifies the Assessment of Changes in PID Controller Performance.
Quite simply, things at a manufacturing facility can change
Using Mode Changes to Uncover Tuning Issues
Poor Controller Tuning. Operator interventions and Mode Changes are often viewed negatively. When a PID loop is switched out of automatic there can be a sense that the controller wasn’t allowed
Using the Oscillation Metric to Uncover Tuning Issues
There’s a wealth of information available in most every data historian. The data can be used to evaluate the performance of a plant’s regulatory control systems in general and to