3 ms·
> Possible solution: always designate COM/MON computers which agree on the mode: flight or ground. Only disable a primary COM computer if it disagrees with the
by avianlyric 5y ago
> Possible solution: always designate COM/MON computers which agree on the mode: flight or ground. Only disable a primary COM computer if it disagrees with the MON computer while both are running on the same mode.
I’m not sure that helps, how do know that the COM computer is correct and MON isn’t? Ultimately you only really care if the two computers are trying to the plane to do different things, if they’re in different modes but producing the same outputs I’m not sure how much you would care.
> So, if the MON computer is faulty it will always disable the 3 computers?
I’m just interpreting what I’ve read. If you know better then please do tell us.
- marcodiego 5y agoActually, I know nothing about the subject; Please don't take my comments as such. Sorry, I should have made that clear. About the first proposal: redundancy using majority of votes is well known. Second, GP said: > There’s a separate watchdog system that monitors the outputs (orders) of both the COM and MON, and if their order values diverge by too much for too long, it shuts down the COM computer and passes control to the MON computer and the spare. What I read from this is: COM differs from MON; watchdog disables COM and uses MON and spare as a new COM/MON. But if previous MON was faulty, it will still differ from spare (except if both are failing in a sufficiently similar way).