The Research On Flight Dynamics Simulation Modeling Of Unmanned Aerial Vehicle Based On Sim Mechanics

In recent years,UAV has developed rapidly and has been paid great attention because of the rich application.Therefore,more and more countries are paying attention to it.The UAV control system determines the performance of UAV,the control system is very complex,including the error compensation of the sensor and the control program in the general sense,the design of control system needs flight test to verify,which greatly increases the investment in human resources.First of all,This paper established the air environment model and the world geomagnetic model during the flight,The environmental model is built by adopting the ISA atmospheric environment standard and the WMM world geomagnetic model,which laid the foundation for aerodynamic modeling and sensor error modeling.Secondly,in view of the ducted coaxial rotor helicopter,described the process of establishing dynamic module of each part,aerodynamic expression of coaxial rotor and propeller are established,calculate the real-time state of motion.Then,the sensor error is established.By using the method of error identification,the static error of the accelerometer,magnetometer and GPS obtained by the experiment is identified,and the white noise is used to simulate the error.Finally,we use SimMechanics and AeroSpace toolbox to build a flight simulation model of the UAV in the MATLAB/Simulink simulation environment,writing the corresponding simulation program.After adding a simple control system,comparing the output response and input of the model to verify the simulation model.The simulation results show that the unmanned aerial vehicle(UAV)flight dynamics model has a high confidence level and basically achieves the desired research goal..The simulation results show that the unmanned aerial vehicle(UAV)flight dynamics model has a high confidence level and basically achieves the desired research goal.