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Tuning of Closed Loop Control

There are often many and sometimes contradictory objectives, when tuning a controller in a closed loop control system. The following list contains the most important objectives for tuning of a controller: Minimization of the integral of the error : The objective here is to keep the area enclosed by the two curves, the SP and PV trends; to a minimum.

No overshoot at start up: The most critical time for overshoot is the time of start up of a system. If we control an open tank, we do not want the tank to overflow as a result of overshoot of the level. More dramatically, if we have a closed tank, we do not want the tank to burst. Similar considerations exist everywhere, where danger of some sort exists.


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