Research Of AOS Transmitter Distributed Simulation Systems Based On HLA-RTI

AOS flexible and diverse characteristics can effectively meet the needs of complex space mission,with the in-depth study of the AOS theory,the corresponding system simulation technology has become more advanced.Because the HLA-RTI can separate the simulation function and the bottom supporting environment,it has the characteristics of independent development and easy management.It can effectively simulate the data processing flow of AOS protocol.So,we use the HLA-RTI platform to carry out the research of the AOS distributed simulation system.The main research contents are as follows:First,the CCSDS AOS system protocol and architecture of HLA-RTI are analyzed,on the basis of this,the overall distributed simulation system model of the AOS transmitter is designed,the installation and configuration of software MAK-RTI2.2,VR-Link3.9.1 and Visual C++ 6.0 are described,and the design method of Socket communication interface based on UDP protocol between federates is gived,The federal members are connected through the Socket communication interface to form a complete distributed simulation system of AOS transmitter.Secondly,the total control member,packing service source packaging and scheduling member and bit stream service source packaging and scheduling member are analyzed and designed specifically.the functional design and operation of the total control members are descriped in detail.The three types of source data are analyzed,and the function and design of the space packaging module,the MPDU multiplexing module,the frame generation module and the virtual channel scheduling module in the packing service source packaging and scheduling member are introduced in detail,and the corresponding correct simulation results are given.The two types of source data are analyzed,and the function and design of BPDU packaging module,frame generation module and virtual channel scheduling module in bit stream service source packaging and scheduling member are also introduced in detail,and the corresponding correct simulation results are given,too.Then,because the function and design method of the additional frame synchronization tag members of the two services are the same,the two federated members are described in a unified way.The principle of frame synchronization is introduced,and the optimal frame synchronization pattern is given.The design process of additional frame synchronization members is described in detail,and the correct simulation results of two service additional frame synchronization members are given.Finally,a set of source data is selected to simulate the two services of package and bit stream respectively.The simulation interface and the simulation results are given.