REAL-TIME VELOCITY AND DIRECTION ANGLE CONTROL OF AN AUTOMATED GUIDED VEHICLE

In this paper, an adaptive fuzzy control (AFC) system is applied to velocity and direction angle control of a certain type of wheeled mobile robots called automated guided vehicles (AGVs). The fuzzy control system includes an adaptive model identifier and controller. The gains of fuzzy controller are obtained by using the fuzzy identifier model which is defined by real system outputs and control inputs. The parameters of fuzzy identifier model are adjusted online by using recursive least square algorithm. A PI controller is also applied to AGV to show the robustness of the AFC system. Experimental results prove that the AFC shows better tracking performance than the PI controller in terms of robustness, smoothness and fast dynamics. Results are given for complex references, sudden disturbance and extra load conditions.