Design And Implementation Of HI-FI Simulation System For Small Satellite Service Subsystem

Satellite high-fidelity simulation has great significance in the development,launch,and on-orbit operation of small satellites.The satellite service sub-system is the core part of the small satellite.It plays the role of overall scheduling,and it is also the most complex part of the entire satellite system.Satellite simulation is an essential part of the small satellite high-fidelity simulation system.It enables the small satellite designers and testers to implement small satellite failure simulation and analysis in the absence of physical hardware,and complete fault location and maintenance program verification.It can also provide support and assistance for the overall program demonstration,design,and on-orbit maintenance of small satellites.The simulation implementation of the satellite service sub-system in small satellites is studied in this thesis.Firstly,the significance of the high-fidelity simulation of the satellite service sub-system is discussed,and the main function and implementation model of the satellite sub-system is introduced.The simulation principle,implementation scheme and architecture of the full digital and semi-physical simulation of the satellite sub-system is discussed on the basis of theoretical research.Finally,the function simulation and fault simulation of the satellite system is designed and discussed in detail.The software engineering method is applied,and it was carried out from the perspective of requirements analysis,software and hardware design,testing and verification about the entire system.By focusing software modeling technology,a small satellite sub-system simulation model is established.And the design of the full digital simulation system of the satellite system is realized by data interaction;and the design of the semi-physical simulation system of the satellite sub-system is also achieved by studying the design method of satellite host and the communication mode of satellite-to-ground data link.In the design and implementation of the small satellite high fidelity satellite simulation system,the software modeling,database,graphical interface,XML language,CAN bus,software engineering and other technologies are mainly included.The full digital software modeling of satellite,satellite semi-physical host communication process realization and fault simulation were completed.The main research indice in the design process of satellite simulation system are simulated and verified,and the simulation results are analyzed,and the conclusion is drawn that the simulation results meet the design requirements o f the whole simulation system.The importance and application prospects of the fault simulation and recovery are focused.