ARCHITECTURE OF A FAULT-TOLERANT DISTRIBUTED CONTROL SYSTEM FOR THE SamSat-ION NANOSATELLITE
Annotation
The key features of the architecture of a fault-tolerant distributed control system for the SamSat-ION nanosatellite are presented. One of the features of the architecture is the use of a “master/slave” approach, for which each on-board system has equivalent controllers connected to a common data bus, and each controller can act as a master on the bus and access other systems directly. Equipping the on-board computer with a dual-core controller with an asymmetric core structure allows to increase productivity - collect and store telemetry on the slave core, and execute the flight cyclogram on the master core. Information exchange between SamSat-ION nanosatellite systems is carried out using a synchronous I2C data transmission bus; all on-board systems can be controlled both from the on-board computer and from the receiver using commands from the nanosatellite flight control center, which increases the fault tolerance of SamSat-ION.
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