Flight Simulation Modeling And System Development Of Light Fixed-wing Aircraft

With the rapid development of computer technology,simulation technology and virtual reality technology,visual flight simulation system has become the focus of current research.Visual flight simulation system plays an important role in aircraft design,pilot training,scientific research and national defense construction.In this paper,based on the basic theory of linear motion and angular motion of rigid body,the derivation process of 6-DOF motion equation of fixed-wing aircraft is studied,and the mathematical model of flight dynamics simulation system is established.The numerical solution of the differential equation is deeply analyzed and the interpolation method of aerodynamic coefficient is introduced emphatically.A simple landing gear model is established according to the flight dynamics simulation requirements.Secondly,the flight dynamics model is decomposed into several sub-models,which greatly improves the maintainability and reusability of the flight dynamics simulation mathematical model.Then according to the division of flight dynamics model and combined with flight dynamics simulation system,it is divided into pneumatic module,landing gear module,engine module,atmospheric environment module,gravity module,mass/inertia module and aircraft six degree of freedom equation module.The dynamic modeling of flight simulation is developed by using C++ object-oriented programming,and the real-time simulation program of flight dynamics is established.Finally,based on VS2010 programming environment,using OSG as the rendering engine,the terrain is rendered by OSGEARTH,and the object oriented C++ programming language is used.According to the mathematical models and programs of the aircraft,the visual simulation system of a light fixed-wing aircraft is developed,and according to the concrete conditions of the system,the visual simulation system of a light fixed-wing aircraft is developed.The real-time settlement of the nonlinear differential equations with six degrees of freedom is carried out,and the real-time state parameters of flight simulation,such as position,attitude,angle of attack and side-slip angle,are obtained.The flight simulation example and flight experience are given.