At the very least, the HUMS and CV/FDR systems need sub-second precision for maintenance and crash investigation reasons. As for why they don't calculate it in

At the very least, the HUMS and CV/FDR systems need sub-second precision for maintenance and crash investigation reasons. As for why they don't calculate it in a particular way, probably just an amateur mistake. Lots of aerospace-related applications are moving towards the methodology where you cook up a model in matlab and then hit the AutoCode button. Things like this are the reason why.