By Jens Eickhoff (auth.), Jens Eickhoff (eds.)
This publication describes the improvement and layout of a different mixed info and gear administration infrastructure The use in small satellites provides a few specific necessities to the platforms like strength failure robustness and dealing with of alternative sorts of exterior analog and electronic interfaces. those necessities bring about a practical merge among On Board computing device and the satellite's strength regulate and Distribution Unit, which leads to a really cutting edge layout or even a patent association. This publication offers procedure engineers and collage scholars with the technical wisdom as combine among technical brochure and a person guide.
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Extra resources for A Combined Data and Power Management Infrastructure: For Small Satellites
G. applied during the DLR BIRD or ESA SSETI satellites. The target for this infrastructure design however was to reach a technology level, which also is of interest for industry for future mission applications and this also was the reason for industry partners engaging so much in this project. This not only applies to the industry partners directly providing components for the OBC and PCDU, but also concerning those industry and agency partners providing test equipment or simulators at pure material cost or even as donations.
3 Failure Management with the Combined-Controller 1. In failure case 1 the running OBSW triggers the reconfiguration functions implemented in the Combined-Controller (CC), via the CPU-CC links, for example a reconfiguration of an OBC decoder/encoder unit. 2. In failure case 2 the auto-reconfiguration is unchanged. It simply is performed through the Combined-Controller, for example induced through watchdog signal timeouts etc. Such watchdog or alert signal lines from the CPU now have to be routed to the Combined-Controller.
The hardware decoded command outputs and pulses do not require software and can therefore be used for critical operations. The CCSDS telecommand decoder provides the entire functionality of reassembling TCs from NRZ-L CLTU level coming from 18 J. Eickhoff receiver side up to Telecommand Frame content. It identifies hardware commands to be routed to PCDU’s Combined-Controller. The special implementation selected here is not based on marking HPCs by MAP-ID, but via dedicated Virtual Channels. In the presented CDPI implementation the hardware commands will be routed to the PDU via an RS422 interface link and the CPDU functionality is implicitly covered by the Combined-Controller of the PCDU.