OPTIMUM TUNING OF A SLOW SAMPLING DIGITAL CONTROL ALGORITHM.
LOUISIANA STATE UNIV BATON ROUGE COLL OF ENGINEERING
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The selection of control algorithms for direct digital control loops is a degree more difficult than the selection of continuous analog controllers, primarily because analog hardware considerations limit the selection to proportional, proportional-integral PI, or proportional-integral-derivative PID controllers. In digital systems the counterpart to the restriction is that the algorithm must be programmable, which is indeed not very restrictive. In addition to this, another parameter--the sampling time--is also introduced. This sampling time must be fast enough to insure reasonable control, but must not be so fast that all the computers time is spent calculating the control algorithms. The use of a digital computer as a time shared controller does offer new advantages to the designer because he is no longer restricted to the conventional modes of feedback control. The purpose of this report is to explore the advantages and disadvantages os using an algorithm other than the discrete equivalent of the typical analog controller. The runing of this algorithm is investigated, followed by a comparison of its performance to that of PI and PID algorithms. Author
- Theoretical Mathematics
- Test Facilities, Equipment and Methods