Thanks so much for the information. I am familair with the voting logic (I've worked on systems that implemented the same thing, odd-number of processor cores and the majority wins).
One question, were any "misbehaving" processor or actuation requests ever logged? As in, were there examples where one actuator or CPU didn't agree in the Shuttle flights?
There have been a fair number of GPC failures [1], and computers have been voted out. I haven't looked closely enough to see how many were "disagreements" versus hard failures or self-check failures.
Comments
Hi kens,
Thanks so much for the information. I am familair with the voting logic (I've worked on systems that implemented the same thing, odd-number of processor cores and the majority wins).
One question, were any "misbehaving" processor or actuation requests ever logged? As in, were there examples where one actuator or CPU didn't agree in the Shuttle flights?
There have been a fair number of GPC failures [1], and computers have been voted out. I haven't looked closely enough to see how many were "disagreements" versus hard failures or self-check failures.
[1] Search for "GPC" in the Mission Summary report: https://newspaceeconomy.ca/wp-content/uploads/2023/05/space-...