Hybrid fuzzy learning/gain adaptive control - A case study for the force control in drilling of composite materials

Fuzzy control of thrust force in drilling of composite materials is studied in this paper. A new hybrid fuzzy learning ing/gain adaptive control scheme is proposed. In this approach. the on-line gain adaptation and fuzzy learning control are coordinated together to ensure a superior control performance of the trained fuzzy controller under large process gain variations. This method makes fuzzy learning control practical for complex and time-varying processes such as drilling of composite materials. Simulations are conducted to evaluate the fuzzy controllers.