Research On The Hardware-in-the-loop Simulation Of Flight Overload And Flight Attitude

This article around the technical problems of flight overload and flight attitude simulation, have combined the three-axis flight simulation turntable with the centrifuge, and have put forward a new kind of overload of flight simulator. And this article have carried on the overload for flying after flight attitude coupled with the overload of flight simulator of dynamics analysis, and then a dynamic model of the overload of flight simulator have been given, and analyzed the torque coupling problem of overload of flight simulator and verified the feasibility and effectiveness of decoupling, finally overload and flight attitude after coupling models have been simulated, and the simulation results have been analyzed. Paper main work is as follows:Firstly, in this paper the origin and background of the topic were introduced, and the necessity and significance of the research problem in this paper were put forward. We respectively introduced the domestic and foreign research results of overload of flight simulator, and the main technical indices of the simulator. The research process of overload of flight simulator and the research overview of the overload of flight simulator were analyzed.Secondly, Flight attitude dynamics analysis in the situation of overload has been given. We pointed out that the function of the three-axis flight simulation turntable is according to the instruction, computer real-time following command signal, by controlling the turntable, roll, pitch, the course of each axis movement to simulate the attitude Angle change, to achieve the simulation of aircraft attitude. And the structure design has been analyzed. The working principle of centrifuge has been introduced. Two kinds of overload of flight simulator, the structure, and a simple have been introduced. The structure of the flight attitude in the situation of overload of flight simulator has been built as well as the dynamics analysis.Again, the main of the paper are flight overload and flight attitude of hardware-in-the-loop simulation technology research, the key question is set up flight simulation model under the condition of flight overload. Core part is to set up dynamic equations of overload of flight simulator. Dynamics of three-axis flight simulation turntable was analyzed, including coordinate transform, the torque equation, the ring passed between shaft coupling torque equations. Within the three axis flight simulation turntable frame, the frame and modeling framework control model, dynamic equations of three frameworks. The friction torque of overload of flight simulator, found by gravity and centrifugal force produced by the friction torque equation has been analyzed, finally the kinetics equations of overload of flight simulator has been built.Also, the problem of flight acceleration simulator decoupling control was addressed in this paper. The goal was using NARX neural network to decouple the torque coupling among three rolls. First we give the model of the flight acceleration simulator, and then the reversibility of this model is proved. This is the prerequisite of the decoupling control using neural network. IMC strategy is introduced to realize the decoupling control, in which the NARX neural network is used to identify the inverse model of the flight acceleration simulator. An appropriate learning algorithm for on-line training of the neural network was proposed to guarantee the convergence of the network. The proposed decoupling control strategy was tested though applications in a flight acceleration simulator. The results of the applications demonstrated the effectiveness of NARX neural network decoupling controller in flight acceleration simulator.Finally, this paper has finished flight simulation experiment research in different overload situations, and analyzed the simulation and comparison, which was concluded that the size of the overload on the degree of impact attitude Angle size relations.