Effect of Cascade Tuning on Control Loop Performance Assessment
نویسنده
چکیده
The effect of cascade tuning on control loop performance is analyzed in the framework of a monitoring system implemented in a refinery plant. Improper (too conservative) tuning of the inner loop may bring to ambiguous or apparently wrong verdicts on the evaluation of single loop performance. Starting from the evidence that operators actions can be different from suggestions given by the monitoring system, the effect of cascade controllers tuning is examined through the illustration of possible scenarios, generated in simulation with different tuning policies. Explanation of the observed behavior and general guidelines to assist operators in the procedure of controller retuning are given.
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