This paper appears in: Aerospace Applications Conference, 1996. Proceedings., 1996 IEEE
Publication Date: 3-10 Feb 1996
Volume: 1,
On page(s): 293-307 vol.1
Meeting Date: 02/03/1996 - 02/10/1996
Location: Aspen, CO, USA
ISBN: 0-7803-3196-6
References Cited: 17
INSPEC Accession Number: 5323335
Digital Object Identifier: 10.1109/AERO.1996.495891
Current Version Published: 2002-08-06
Abstract
The flight control system for the Boeing 777 airplane is a
Fly-By-Wire (FBW) system. The FBW system must meet extremely high levels
of functional integrity and availability. The heart of the FBW concept
is the use of triple redundancy for all hardware resources: computing
system, airplane electrical power, hydraulic power and communication
path. The Primary Flight Computer (PFC) is the central computation
element of the FBW system. The triple modular redundancy (TMR) concept
also applies to the PFC architectural design. Further, the N-version
dissimilarity issue is integrated to the TMR concept. The PFCs consist
of three similar channels (of the same part number), and each channel
contains three dissimilar computation lanes. The 777 program design is
to select the ARINC 629 bus as the communication media for the FBW
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