System Design Of Spacecraft Avionic

Avionics system adopts computer network technology to connect allkinds of devices in the satellite, implementing an informationprocessing/transmitting system that achieves information sharing, resourceutilization and optimization. With uniform task scheduling andmanagement, it realizes all kinds of management tasks, including data,AOCC, heat, time, power, payload, data links between the satellite and theearth management. In addition, it also realizes independent fault detectionand safety management. The essence of avionics system is to produce,transform, exchange and transmit information, it integrates most electronicdevices on the satellite, while the latter’s performance relies on the designlevel of the system.This paper focus on the application requirement of avionics, adoptsthe open architecture aiming at achieving “centralization management,distributed measurement and drive, open architecture and componentdesign”. With hardware/software module, internal/external bus as basicelement, it aims at building a general, standard, extensible avionics system.This paper includes the design of high/low speed network system,standard for hardware module and function design, plug-in technology.Moreover, it introduces the device architecture and software architecture indetail, and proposes a standalone/module level plug-in method.This paper uses traditional avionics as an example, introduces theapplication method of avionics, and prospects the avionics upgrading anddevelopment.The research done in this paper combines the real engineering work,develops deep research on the avionics architecture, and gives guidelinesfor the real engineering work.