Research On Flight Attitude And Trajectory Of The Uavs Simulation System Based On HLA

Unmanned Aerial Vehicle(UAV) flight simulation systems play an important role in the military and aviation field, which is widely used in UAV’s development,performance analysis and flight exercises. Not only can the simulation system greatly shorten the UAV development time and decrease the cost, but also can verify the feasibility of UAV tactics. In this paper, High Level Architecture(HLA) simulation technology is adopted to the UAV simulation system platform. HLA which is a new generation of simulation system architecture provides a common technical support frame for complex systems and modeling. HLA can effectively figure out the reusability and interoperability of simulation system.The main innovative point of the paper is that integrating HLA architecture with simulation technology, confirming the frame of flight simulation system. The modular design is used by the functions of the simulation system, which are HLA frame system and three-dimensional visual module, so as to improve the reusability of the simulation platform. In this paper, the constitution of the HLA technology and the architecture of Run-Time Infrastructure(RTI) are discussed firstly. A scheme of the software design for flight attitude and trajectory of the UAV simulation system based on HLA is proposed.According to the analysis of the Federation Development and Execute Process Model(FEDEP) to design the federate of the simulation system, including flight simulation federate、manager federate、data management federate、flight playback federate and three-dimensional visual display system. The dissertation detailed overview of the implementation of the function of federate. All of interactive information among every module is managed by RTI. The data communication between modules through the corresponding federate is achieved.This dissertation researches the flight dynamics of the UAV. According to some basic parameter indexes, some corresponding mathematical models of the UAV are established. The implementation of the UAV’s turning movement is described in detail.To complete the UAV’s flight effect, linear interpolation algorithm is applied to realize smooth processing of flight destinations. In this system, the visual display module which is developed in the environment of modeling tool(Creator) 、 scene driving tool(Vega Prime) and VS2003, can finish the flight according to the specified path viathe control of the network command.