Research On Lunar Soft-Landing Simulation System Based On HLA

HLA(High Level Architecture)is a full new simulation architecture. Because of solution of both cooperation and repeatability in simulation domain, HLA has been a distribute simulation technology standard of IEEE. Based on the demand of lunar soft landing simulation tasks, the paper deeply studies the development of key technologies of HLA Federate. Main contents are as follows:The structure of HLA system and development of the federate process is studied. For the needs of lunar soft-landing simulation system, using the COM component technology,the paper designs the lunar soft-landing architecture based on HLA.Focusing on system modeling and simulation based on HLA,this paper has analysed the following program procedure and software structure of federation from both theory and practice,and the life-cycle process in the whole federation executing process.So on the base of the essence of the HLA and the Object-Oriented method,this paper also makes the federation abstract and designs federate framework class.Different simulation entities modules embeds in the framework.The tool that generates federate software codes from HLA object modle (FOM/SOM) based on the framework class is designed.The federate members automatic generation tool is established.The tool can generate the public codes of federate, which can not only provide the interface between federate and RTI, but also provide an abstract of the layer between simulation model entities and RTI, shielding their respective fields of advanced technology for the independent development and meeting different simulation's interoperability;In another way the tool implementates the common functions of HLA rules, generated federates solved class members in the code reusability which avoid duplication of preparation and improve the efficiency of the development.The duty of federate development of lunar soft landing simulation system is achieved using the study results.The application of the tool software showing the scheme is validated. According to the needs of simulation tasks and the needs of deep space exploration, Federation can generate the corresponding federate from SOM. The simulation software tool is not only a important component of the simulation platform. but also a foundation for the future development of the simulation system.