Adaptive Fuzzy Control of Direct-current Motor Dead-zone Systems

An adaptive fuzzy control scheme is studied in this paper for the directcurrent (DC) motor systems with dead-zone input. The fuzzy logic systems are used to approximate the unknown functions in DC motor and based on the information of the parameters on the dead-zone, an adaptive fuzzy control approach is developed via backstepping design technique. Compared with the existing works for DC motor, less adjustable parameters are used in the approach. So, the computation load on line is reduced. The proposed scheme guarantees that the system output follows the reference signal to a small compact set and all the signals in the closed-loop are bounded. Simulation example is given to verify the effectiveness of the design method.