Research On UAV Real-time Flight Simulation System Based On RTX

Flight simulation system is one of the key platform for UAV flight control system design and ground verification, validation is essential for UAV flight control system dynamic function and performance index. With the rapid development of computer technology, the hardware performance of the PC machine to meet most of the requirements of hardware simulation. Therefore, in order to improve the versatility and reduce the development of simulation software and the use of difficulty, this paper takes PC and RTX real time extension system based on the Windows operating system as the software and hardware platform, design and development of a real-time UAV flight simulation system. The main work and research are as follows:The hardware of UAV real-time flight simulation system using two PC computer, including a DELL laptop computer and a DELL desktop computer; according to different function modules to computer hardware platform to achieve flight simulation software, modular, universal, easy maintenance; two computers connected to each other through a network interface, to realize the information interaction.This paper established the sample UAV nonlinear six degree of freedom mathematical model. Based on the analysis of the actuator and sensor, a typical mathematical model was established for simulation calculation. This paper studies the flight environment of UAV, a typical atmosphere disturbance mathematical modeling. According to the requirement of real time simulation of UAV and the accuracy of six degree of freedom model, conducts the analysis research to the four kinds of typical simulation algorithm, the choice of the simulation algorithm and simulation function.Secondly, research on RTX real-time operating system, according to the characteristics and requirements of the real-time flight simulation and real-time test, laid the foundation for the design of real time simulation software. According to the function and performance of real time flight simulation software to carry out simulation analysis, software requirements, software design and development scheme is given. On this basis, the real-time simulation software RTX has carried on the detailed design, discusses in detail the process of the software development. According to the functional and performance requirements of UAV flight real-time simulation system for information exchange between computers, this paper based on the design of real-time communication software of network communication interface and serial communication interface and communication test.Finally, in order to verify the function and performance of the RTX of the UAV flight simulation system based on real time, using the sample UAV system model for real-time flight simulation semi physical test. The experimental results show that: the RTX of the UAV flight simulation system based on real time has a good real-time and reliability, and its function and performance meet the requirements of the flight simulation test.