Research On Helicopter Aviation Simulation System

In 1930's,people created a sort of new aero craft—helicopter,which can"vertical take - off and landing"and"suspend". This text depicts the control mode and characteristic of helicopters,and analyzes the dynamic state in typical condition. It predigests and amends the dynamics system simulation models,according to helicopter dynamics system simulation needs,especially predigests the dynamical calculation method. Being short of experiental data, the dissertation can approximately analyse the force which pressed to the helicopter. The simulation model can successfully decrease the complexity of driving helicopter. The simulation and modeling method of this dissertation is suitable for common helicopter and is of currency and practicability. Each chapter of the dissertation is introduced in the following context:1. IntroductionOn the base of referring to a great deal of external and internal technique information, the various contents were summarized as below : (1)The key technology of this subject;(2)The currently researchful trends and level inside and outside nation.On this basis content and means of this dissertation were put forward in combination with investigative background of this dissertation.2. The analyse of working characteristic of helicopterAccording to differently classifying criterion of helicopter, helicopter was classified.The primary characteristic of helicopter (relative to plane having fixed wing) was briefly introduced and in allusion to differently aviation carriages control mode was put forward.3. Helicopter dynamics differential equationIts specific contents include the following parts:(1) It put forward concept of ground coordinate system and fuselage coordinate system, movement parameter and controled quantity of helicopter;(2) The 6-DOF flight equation of helicopter was established in ground coordinate system and fuselage coordinate system. The equation included six degree of freedom,which included the forward/backward, up/down,left/right speed and the pitch angle,yaw angle,roll angle;(3) We analysed forces and moments acting on the helicopter one by one and finally we predigested these forces and moments.4. The numerical value arithmetic of the dynamics differential equationOn the precondition of high veracity, We paid attention to the numerical value and iterative arithmetic of the following dynamics differential equation. We adopted four steps classical Runge—Kutta arithmetic,the material arithmetic and caculate flow were set forth.Because of it,We insured the exigent timing quality in this system.5. The instauration for visual simulation system and software development environmentAccording to the purpose of simulation,the correlative knowledge of the instauration for visual simulation system was set forth.Via 3D modeling Software Multigen Creator,the visual model of helicopter and airport was established. OpenGVS,a powerful 3D graphics engine, was used in developing the software.According to the viewpoint of modern software engineering, a software frame was built with the support of Visual C + + 6.0, and the code of key modules has been finished.Aiming at inputting module,Joystick is control tool of switch of visual angle and programme about joystick is achieved by DirectInput in this subject.6. The realization of program and the result of simulationWith the support of Visual C + + 6.0, the function of code which is used for demonstration can make this system's timing quality perfect by use of joystick in the course of aviation simulation.It can achieve better effect of aviation simulation.Every capability index can satisfy technological request in the subject.7. Conclusions and OutlookThe summary of the whole dissertation is given out,suggestion and prospect of the dissertation are given.