HIERARCHICAL FUZZY CONTROL SCHEMES FOR NONLINEAR

To lpduce the dimcultiea in ehwsing an appropriate hly knowledge base, Le., seoliog kctors, membership fundions and rules etc., of a fuzzy controller, a hierarchical fuzzy controller (HFC) Is proposed. This hierarchical fuzzy controller is divided Into several hierarchical level subcontrollers, which can be designed separately. Each subcwtmller can be deaigmd easily and cnn perform well at a certnln level and running state. According to the hierarchical structure, when all the subcontrollers perform well, the hierarchical fizzy controller can gain good performanee.