Single Event Latch-up Recovery System

This is my M.Sc Thesis at Kyushu Institute of Technology, Japan

Cosmic-Ray effects in microelectronic like Single Event Upset (SEU) and Single Event Latch-up (SEL) has been of significant concern in satellite electronics since the ’70 and continued to be of increased concern. The use of COTS components usually made for terrestrial application in Lean satellite make them susceptible to SEL which in extreme cases can cause the permanent failure of the spacecraft. BIRDS project is the fourth lean satellite project from the Laboratory of Spacecraft Environment Interaction Engineering, Kyushu Institute of Technology, Japan. In previous experience from Horyu 2 and Horyu 4, members have seen that the satellite stops responding to commands when unexpected anomalies occur. Most of the anomalies can be related to SEL occurrences. To achieve a more reliable operation, we need to understand the correlation between SEL occurrences and anomalies observed in satellites. Therefore, it becomes necessary to detect, measure and self-recover in orbit from SEL. In this Research, a new method is proposed for measuring SEL occurrences by taking logs of On-Board computer (OBC) reset events in orbit over the period and for designing an entirely self-recovery system of OBC from SEL.


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