Electronics designed for space must operate reliably in the presence of significant EM radiation. Commands and status information must be passed around spacecraft reliably, which means that if the information is corrupted in transit, either the corruption is reliably corrected, or if not, then reliably detected so the information may be re-transmitted. It is costly to design serial communications protocols that perform reliably, so for many spacecraft, the MIL-STD-1553 bus is used for communications. The CAN bus, designed originally for use in automobiles, is a robust serial bus and data exchange protocol that provides a less expensive but reliable and robust alternative while offering the systern designer greater flexibility. This paper briefly describes the CAN bus, its inherent robustness and flexibility, and how it has been used for communication of commands and status information within a space-borne radar instrument. It describes how, by means of a specially developed ASIC device, a control system is being used in a space radar using the CAN bus to allow accurately timed control of an electronically steered microwave antenna.
CAN bus for space instrument control
CAN-Bus für die Steuerung von Raumfahrtinstrumenten
2002
4 Seiten, 4 Bilder, 2 Quellen
Aufsatz (Konferenz)
Englisch
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