Accession Number : ADP006348

Title :   Integrated Communications, Navigation, Identification, Avionics (ICNIA) Expert System for Fault Tolerant Avionics,

Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Minges, Mark E.

Report Date : SEP 1991

Pagination or Media Count : 15

Abstract : Embedded Avionics Systems for aircraft are becoming increasingly more complex. Very High Speed Integrated Circuits (VHSIC) and semi-custom devices are used to gain many-fold increases in processing power and capability. Mission and operational requirements dictate a high availability and fault detection capability defined quantitatively as ninety-eight percent detection of all faults and isolation of ninety percent of those faults to a line replaceable module (LRM), or ninety-five percent of the faults to two LRMs. The Integrated Communications, Navigation, Identification Avionics (ICNIA) program utilizes a module Maintenance Node (MN) which aids high speed testing of the LRM, and gives the ability to isolate the fault (s) to one or more modules. The MN uses the concepts of set scan design, pseudo-random test vector generation, output response compression, and separate set scan loops to test the Small Scale Integration (SSI) - Medium Scale Integration (MSI) logic on the LRM. The resultant data is made available to the expert system within ICNIA so that real-time fault detection and isolation can be achieved. The objective of the expert system within ICNIA is to detect and isolate faults in near real-time and minimize the false alarm rate.

Descriptors :   AIRCRAFT, AVIONICS, COMMUNICATION AND RADIO SYSTEMS, COMPRESSION, DETECTION, EMBEDDING, EXPERT SYSTEMS, FALSE ALARMS, FAULTS, IDENTIFICATION, INTEGRATED CIRCUITS, INTEGRATED SYSTEMS, INTEGRATION, ISOLATION, LOOPS, MAINTENANCE, MODULAR CONSTRUCTION, NAVIGATION, NODES, OUTPUT, POWER, PROCESSING, PSEUDO RANDOM SYSTEMS, RATES, REAL TIME, REQUIREMENTS, RESPONSE, SCALE, SCANNING, TEST AND EVALUATION, TOLERANCE, VECTOR ANALYSIS.

Subject Categories : Computer Programming and Software
      Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE