Design And Simulation Of Fuzzy Fractional Controller Based On Unmanned Aerial Vehicle Flight Control System

With the development of the theory of fractional calculus,more and more experts and scholars are aware of the superiority of fractional-order control theory to system modeling and system control in the control field.Fractional order controller is a key part of the control system,and fractional order controller than integer order PID controller has a greater range of adjustment and greater robustness,so this thesis will be used in fractional order controller UAV flight Control system control law design.On the basis of the fractional-order controller,the fuzzy-fractional-order controller with parameter self-tuning is designed by combining the fuzzy control with the fractional-order control system.The main research works are as follows:(1)The basic concepts of fractional calculus,several different methods and properties of fractional calculus and several different representations of fractional systems are introduced,which provide the theoretical basis for the research and design of fuzzy fractional order controllers(2)The longitudinal attitude control model and lateral attitude control model of UAV flight control system are established,and the fuzzy fractional order controller is designed as the controlled object of the designed UAV flight control system.(3)The fuzzy control theory is introduced into the fractional order control system,and the appropriate membership function and fuzzy rules are selected to design the fuzzy fractional order controller.The fuzzy fractional order controller achieves the parameter self-tuning function by the fuzzy reasoning,and obtains five optimal parameters,which makes the system reach the ideal steady state.(4)The longitudinal and lateral attitude control model of the UAV control system is taken as the control object of the fuzzy fractional order controller.The simulation model is set up in Simulink.The fuzzy fractional order controller is combined with the optimal fractional order controller and the optimal PID controller to compare the simulation results can be seen by comparing the fuzzy fractional order controller can be a very good completion of the parameters of self-tuning function,the system reaches a stable state,and the control effect is ideal,the system performance is very Good improvement.The parameter self-tuning method of fuzzy fractional order controller provides a new choice for the parameter setting of fractional order controller.