High Reliable Remote Terminal Unit for Space Applications

Commonly in space systems there are subsystems or instruments with a low or null communication or processing capabilities. This paper describes a high reliable, low power consumption and small sized remote terminal unit aimed at connecting these subsystems to the satellite's system bus. The des...

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Bibliographic Details
Main Authors: Guzman, D., Prieto, M., Garcia, D., Ruiz, V., Almena, J., Sanchez, S., Meziat, D.
Format: Conference Proceeding
Language:English
Subjects:
Communication system control
Energy consumption
Fault tolerant systems
Field
Hardware
Instruments
Joining processes
Microcontrollers
Power system reliability
Redundancy
Remote Terminal Unit (RTU)
Satellite
System buses
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Description
Summary:Commonly in space systems there are subsystems or instruments with a low or null communication or processing capabilities. This paper describes a high reliable, low power consumption and small sized remote terminal unit aimed at connecting these subsystems to the satellite's system bus. The design includes a SoC based on an 80C32 microcontroller and provides a 2.0 CAN controller; a general purpose digital I/Os; ADCs interfaces; and one UART interface. As key features concerning fault tolerance, the proposed system uses space qualified components; hardware redundancy is considered; it has auto-check capabilities; and if necessary, the embedded generic firmware allows remote downloading of updated versions of flight software through the CAN bus and, in the same way, by means of a CAN message the full system can be restarted by the spacecraft control system.
DOI:10.1109/DSD.2009.184