Fault-Tolerant Digital Airborne Data System Flight Test.
Final rept. May 73-Aug 74,
HUGHES AIRCRAFT CO CULVER CITY CALIF
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A fault-tolerant data multiplexing and transmission system for fly-by-wire flight control application was successfully flight tested. The Fault-Tolerant Digital Airborne Data System F-DADS was adapted and installed as a link in the fly-by-wire flight control system of the USAFCALSPAN Total In-Flight Simulator TIFS aircraft. Sixteen analog signals, including pilot inputs, elevator, rudder, etc., autopilot feedback, attitude, rates, etc., were time multiplexed and transmitted via a serial digital data bus. F-DADS data terminals were redundant for failure protection. In addition to a conventional twisted pair wire data bus the multiplex link was operated with a fiber optic data bus and a microwave data bus which are immune to almost all types of electromagnetic interference.