Overview of Space Plug-and-Play Avionics Interface Technology

The space plug-and-play avionics (SPA) technology can meet the requirements of rapid development of micro satellites, and has become a hot research topic in space technology at present. The SPA system as a whole is a set of interface-driven standards, and the interface standards play a key role in the SPA architecture. This article comprehensively sorts out SPA interface standards. Firstly, the development status of SPA technology is introduced; secondly, the SPA interface model adapted to different device types is analyzed, and the functions of the main interface standards are introduced in detail, such as I2C-based SPA-1, USB-based SPA-U, SpaceWire-based SPA-S, and SPA-O based on optical network; finally, the typical applications of the SPA interface standards are analyzed.