HYBRID ALGORITHM OF FORMATION OF BASE OF RULES OF FUZZY REGULATOR
The Results of interaction between classical and fuzzy regulators of an automated control system are given in work. The classical PID-regulator and the fuzzy regulator which base of rules can be created in the automatic mode are taken as a basis. The standard algorithm of fuzzy conclusion of Mamdani on the basis of which the hybrid algorithm of formation of base of rules of fuzzy regulator allowing to receive desirable control depending on degree of complexity of the solved tasks is offered is considered. Key difference of the offered hybrid algorithm is change of the main stages of fuzzy conclusion realized in standard algorithm of Mamdani, in particular, the first stage is the fuzzification stage, the second - a stage of formation of base of rules of fuzzy regulator. Thus, the input of the fuzzy regulator receives information, which represents the measured output values are obtained continuously during work of the control system with a classic regulator. The block diagram of a hybrid control system for the developed algorithm is provided. The constructed fuzzy control model on the basis of hybrid algorithm is less dependent on expert knowledge in the subject area and uses as knowledge such variables as a deviation of system, speed of change of a deviation and the control action on the object obtained in the simulation using the classic regulator. Thus for synthesis fuzzy PID controller it is enough only two input variables and one output. The principle of work of the developed algorithm is graphically shown. Work of fuzzy control model on the basis of hybrid algorithm with the general logical conclusion in four stages (fuzzification, fuzzy output, composition, defuzzification) is shown in the graphic FIS editor.