A Method of Control System Design based on Dynamic Inversion and Variable Structure Control Applied to BTT UAV

A method of designing control system based on dynamic inversion(DI) and variable structure control(VSC) applied to Bank-To-Turn(BTT) Unmanned Aerial Vehicle(UAV) is proposed.Firstly,the control system is divided into two subsystems based on timescale techniques.In the fast-variable subsystem,are considered to be outputs,calculated aerodynamic moments are considered to be inputs,then the actuator surfaces are calculated,in the design of control law,the subsystem is linearized based on dynamic inversion,then the VSC law is designed based on calculated aerodynamic moments error.In the slow-variable subsystem,are considered to be outputs,are considered to be inputs,in the design of control law,the subsystem is linearized based on dynamic inversion,then the VSC law is designed based on calculated aerodynamic forces error.The method requires bounds of aerodynamic derivatives,and it is easy and fit to engineering.The lastly,the simulation proves that the method is effective.