Accession Number:

ADP006348

Title:

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

Descriptive Note:

Corporate Author:

WRIGHT LAB WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1991-09-01

Pagination or Media Count:

15.0

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.

Subject Categories:

  • Computer Programming and Software
  • Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE