Abstract
The new fault-tolerant onboard computer(OBC) with dual processing modules is presented to improve the micro-satellite data handling. Each processing module is composed of 32-bit ARM processor. Using the fault tolerance method, The OBC's hardware structure is implemented based on commercial-off-the-shelf (COTS) devices. As well as, a detail analysis of the fault handling mechanism and the software architecture is given. Considering the demanding of the extremely tight constraints on mass, volume, power consumption and space environmental conditions, the new fault tolerant onboard computer's data handling is enough to meet the micro-satellite missions.
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