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Advanced Regulatory Control by David W. Spitzer

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Controller Tuning Strategies

Before controller tuning constants are set, it is important to determine the desired control strategy for the control loop. Control loop performance can be measured using a number of techniques, such as the percentage overshoot, time to return to set point, integrating the error, and integrating the absolute value of the error. The concepts behind these criteria are valid, but they are primarily of theoretical value in actual plant operations.

The most important determination is whether the control loop should be tuned for set point changes, for process disturbances, or for reduced overshoot. The desire for stability (tuning for process disturbances) and operator adjustment (tuning for set point changes) usually precludes ...

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