Development of the information exchange system equipment for the small spacecraft onboard control unit

This paper describes the main engineering solutions and results of the information exchange system for the small spacecraft onboard control unit design. The structure of the information exchange system has been determined. Main engineering solutions have been substantiated including usage of the open source products and technologies, network architecture based on SpaceWire with SxPA, with the use of FPGA. Three types of devices have been designed: SpaceWire routing switch, single-chip onboard computer based on LEON3 processor, interface extension unit. The exterior of the developed devices and their main characteristics are presented. The devices of the information exchange system are of rich functionality, high performance, small size and low power consumption. The information exchange system was tested and delivered to the customer.