Application of parameter self-adaptive fuzzy-PI controller to rotary position control

To deal with the problems of non-linearity and uncertainty disturbance in the rotary position system of car navigation, the double closed-loop control system was designed. The parameter self-adaptive fuzzy-PI controller was used for inner loop control. By simulating human thought of fuzzy control, the dynamic performance of the system was improved. PI regulator was introduced to guarantee the steady precision and make up for the shortcomings of fuzzy control so that the system robustness and stability precision were improved. The parameters of PI controller could be regulated by control value when controller was switched. The positional control accuracy was guaranteed through PI controller which was designed in outer loop. Simulation results show that the designed control system has run smoothly with strong anti-jamming ability and high positioning accuracy by the double closed-loop control while there exists external disturbance.