A fault-tolerant air data/inertial reference unit

Author

Sheffels, Michael L.

Author_Institution

Honeywell Commercial Flight Syst. Div., Minneapolis, MN, USA

Volume

8

Issue

3

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

48

Lastpage

52

Abstract

The fault-tolerant air data/inertial reference unit (ADIRU) described is a key part of a fault-tolerant air data/inertial reference system (ADIRS) designed to be the inertial and air data reference for the ARINC 651 Integrated Modular Avionics (IMA) distributed architecture. The ADIRU has been designed to meet the commercial aviation market demands for low life cycle cost and high integrity fault detection, fault isolation, and redundancy management. The ADIRU´s internal redundant resources provide quad channel redundancy that is one level higher than conventional triple redundant systems, allowing it to provide deferred maintenance capability. Robust partitioning, simple serial internal interfaces, and simple voting planes ensure that internal redundant components are properly utilized to provide high integrity system outputs. This relieves systems using it from having to perform their own redundancy management of the air data and inertial outputs from multiple sources required by conventional systems.<>

Keywords

aerospace computing; aircraft instrumentation; computer architecture; fault tolerant computing; inertial navigation; redundancy; ARINC 651 Integrated Modular Avionics; commercial aviation; distributed architecture; fault isolation; fault-tolerant air data/inertial reference; high integrity fault detection; high integrity system outputs; low life cycle cost; partitioning; quad channel redundancy; redundancy management; serial internal interfaces; simple voting planes; triple redundant systems; Aerospace control; Aerospace electronics; Aircraft; Costs; Fault detection; Fault tolerance; Hardware; Navigation; Redundancy; Sensor systems;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems Magazine, IEEE

Publisher

ieee

ISSN

0885-8985

Type

jour

DOI

10.1109/62.199822

Filename

199822