TL32 Datasheet, PDF (14/31 Pages) List of Unclassifed Manufacturers – Real Time System Testing MIT 16.070 Lecture 32

Fault Tolerance
Redundant Hardware Solutions - A two processor scheme
Primary
Secondary
• Primary sends replica of all its inputs to Secondary
• Secondary runs same software as Primary
• Secondary checks for “pulse” from Primary to verify its health
• If pulse is absent, Secondary takes over the system
• Requires redundant communication lines to all system components
• Many military aircraft systems are built this way
hperry
5/4/01