Fuzzy Logic Controller with Optimum Weighting Factor Used for Automatic Drilling Experimental System
Zhu Liang · Journal of Xi'an Petroleum Institute · 2003
A fuzzy logic controller with an optimum weighting factor is worked out for automatic drilling experimental system.The objective function of the optimization is the integral performance index. The optimum rules ofthe fuzzy logic controller are gotby the optimization of the weighting factors of error and error increment.The simulation resultof this fuzzy logic controller with an optimum is compared with that of usual fuzzy logic controller.It is shown that when controlled by the usual fuzzy logic controller, the automatic drilling experimental system can' twork well because of too greatpeak overshoot,while the fuzzy logic controller with an optimum weighting factor can greatly improve the performance of the experimental system,its peak overshoot can be reduced to 4% ,its settling time is 1 7seconds,its steady state error is less than0 .1 % ,and its other performance indexes are all satisfactory.