Design of the Three Degree-of-Freedom Platform for the Flight Simulator
|School||Harbin Institute of Technology|
|Course||Mechanical and Electronic Engineering|
|Keywords||Flight Simulator Three degrees of freedom motion platform Kinematics Dynamics Integrated simulation|
Flight simulator motion system provides pilots with real aircraft the same or similar motor and sensory. Flight simulator with motion system to realistically simulate momentary overload and the actual flight flight attitude of the aircraft on the ground and in the air, so that the real-time state of motion of the pilot of the aircraft have a deep body experience, so that the flight simulation more close to the real flight, to achieve a better training effect. Flight simulator motion systems mainly through the motion platform. According to the general requirements of a certain type of fighter flight simulator, using the anti-torque arm structure of three degrees of freedom motion platform motion system, the aircraft roll, pitch and heave three degrees of freedom motion can be reproduced. Although this form of motion platform has been widely used in engineering practice, but in the analysis and design, only to rely on the experience of the engineering staff to carry out the basic state is no theoretical guidance, especially the kinematics of the motion platform, transport, mechanics, and control features The lack of in-depth research, this paper three degrees of freedom motion platform analyzed from several aspects. These issues are developed to meet the design requirements of the flight simulator motion systems engineering practice important guiding significance. Three degrees of freedom motion platform is a multi-variable and the nature of complex nonlinear system, kinematic and dynamic analysis is the premise of the motion platform structure design and hydraulic drive system design. Single rigid body dynamics using the coordinate transformation and derivation method were analyzed three DOF station kinematics; and without regard to the anti-torque arm, the quality and inertia of the hydraulic cylinder system, based on the Newton - Euler model; still kinematics analysis and dynamics analysis based on the design of the power mechanism of the system, and gives the system power mechanism in the basic conditions of load matching curve. Three degrees of freedom motion platform is another important research direction is three degrees of freedom motion platform control characteristics, the control system will directly determine the system will eventually reach the performance indicators. Based on symmetrical valve control the transfer function of the mathematical expression of the asymmetric cylinder design a simple PID controller regulation, a preliminary analysis of the characteristics of the control system. In order to verify the feasibility of the analysis before physical prototypes are built, the paper application SimMechanics (?) To establish a virtual prototype model of the kind, and with Matlab (?) / Simulink simulation software integration kinematics, dynamics and control systems The feasibility of an integrated simulation that this method can be more realistic simulation of the actual three-freedom motion platform, the results show that the contributions of the thesis kinematic analysis, dynamic analysis, and the analysis of the control system is feasible. The design provides the necessary basis for the development of the sports station for flight simulation training.