Fault-tolerant multi-processor systems and methods for an aircraft

A computer-implemented method for controlling an aircraft, comprising:

• receiving, from a source processor among a plurality of processors, a first copy of a signal corresponding to an input device;
• sending a second copy of the signal to all other processors of the plurality excluding the source processor, wherein the second copy of the signal is substantially identical to the first copy of the signal;
• receiving a number of second copies of the signal from all other processors of the plurality excluding the source processor, the number of second copies being equal to the number of all other processors of the plurality excluding the source processor;
• determining a consensus signal based on the first copy and the second copies of the signal;
• and
• determining a command signal for an effector of the aircraft based on the consensus signal, and
• wherein no two processors of the plurality receive the signal from a same input device.

A signal-processing multi-processor system for an aircraft, comprising:

• a first pair of processors comprising a first command processor and a first monitor processor;
• a second pair of processors comprising a second command processor and a second monitor processor;
• and
• an effector configured to act based on the command signal received from the first pair of processors,
• wherein each monitor processor is configured to:
• compare a first command signal generated by a corresponding command processor with a second command signal generated by the monitor processor;
• and
• in response to determining the first command signal differs from the second command signal, inhibit the corresponding command processor.