THE BOEING 777 FAULT TOLERANT AIR DATA INERTIAL REFERENCE SYSTEM A NEW VENTURE IN WORKING TOGETHER

摘要

The Boeing Commercial Airplane Group has certified an all-new, integrated Fault Tolerant Air Data and Inertial Reference System (FT-ADIRS) on its 777 airliner. The FT-ADIRS consists of the Fault Tolerant Air Data and Inertial Reference Unit (FT-ADIRU), the Secondary Attitude and Air Data Reference Unit (SAARU), and six Air Data Modules (ADMs). In order to develop this system, it was necessary to forge new relationships between Boeing, its suppliers, and its customers and within Boeing itself. New processes for the design, verification, and validation of the system were developed.rnThe FT-ADIRS redundancy management and system performance were validated using a unique process whereby flight-recorded sensor data were replayed through actual production units. Faults were inserted in a Monte Carlo fashion to demonstrate the ability of the inertial navigation and air data functions to isolate and survive sensor faults in real-time.