This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analytical Study of the Reliability of a General Aviation Cockpit Instrumentation System
Technical Paper
1999-01-5571
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A study of the cockpit information system architecture of current single-engine single-pilot aircraft was performed to establish a baseline for the evaluation of the reliability of new cockpit systems being developed through the Advanced General Aviation Transport Experiments (AGATE) program. That study defines a “typical” General Aviation (GA) cockpit information system architecture consisting of 38 components making up 32 subsystems. It also developed a reliability (fault tree) model for the system and utilized a proprietary analysis tool to compute system reliability.
Fault tree reliability models have gained wide acceptance since their introduction in the 1960’s to analyze the probability of success of military defense systems. Fault trees use logic gates to express the relationships between failures of the components and resulting failures of subsystems and of the system.
In a subsequent study an analytical model corresponding to the specific cockpit system reliability model was developed and implemented in a spreadsheet format. In addition to the system reliability equation, all of the subsystem reliability equations were also derived. From the analytic reliability model, the sensitivities of all of the subsystem and system reliabilities to changes in the component reliabilities were derived. These equations were also implemented in the spreadsheet tool. The resulting tool allows a user to modify the component reliability parameters and compute and display the system and subsystem reliabilities and the sensitivities of these reliabilities to changes in the component reliabilities.
This paper describes the single-engine single-pilot aircraft cockpit information system reliability model, explains the derivation of the analytical model for reliability and sensitivity computation, discusses the insight obtained from the analytical model, and presents the application of the spreadsheet tool.
Recommended Content
Authors
Topic
Citation
Thompson, J., , ., Head, ., Stough, H. et al., "Analytical Study of the Reliability of a General Aviation Cockpit Instrumentation System," SAE Technical Paper 1999-01-5571, 1999, https://doi.org/10.4271/1999-01-5571.Also In
References
- Operational Requirements for the Advanced General Aviation Transport Experiments (AGATE) Project version 1.2, AGATE Program Office NASA Langley Research Center Hampton, VA May 23 1997
- General Aviation Aircraft Cockpit Instrument Reliability Analysis Office of Safety, Environment and Mission Assurance NASA Langley Research Center Hampton, VA April 8 1997
- Practical Reliability Engineering 3rd Ed. Wiley 1991 Duncan, A.J. Quality Control and Industrial Statistics 5th Ed. Irwin 1986 Carter, A.D.S. Mechanical Reliability 2nd Ed. Macmillan 1986
- Reliability Qualification and Production Approval Tests Reliability Programs for Systems and Equipment available from National Technical Information Service Springfield, VA Measuring Product Reliability Electronic Parts Reliability Data 1997 Nonelectronic Parts Reliability Data Practical Statistical Analysis for the Reliability Engineer Confidence Bands for System Reliability New Weibull Handbook Fault Tree Analysis Application Guide http://rome.iitri.com/rac/
- IEEE Transactions on Reliability IEEE Quality and Reliability Engineering International Wiley
- Bavuso, Salvatore J., HiRel: Hybrid Automated Reliability Predictor (HARP) Integrated reliability Tool System (Version 7.0),” NASA TP-3452 1-4 Nov. 1994 Cactus Brand Software, Inc. RAILS: Reliability and Availability Software Tool http://cactusbrand.com/
- Dugan, Joanne B. Venkataraman, Bharath Gulati, Rohit DIFtree: A Software Package for the Analysis of Dynamic Fault Tree Models Proceedings of the Annual Reliability and Maintainability Symposium 1997
- Thompson, J. Garth Analytical Study of the Reliability of a General Aviation Cockpit Instrumentation System AGATE Program Office NASA Langley Research Center Hampton, VA August 7 1997
- Federal Aviation Regulations (FAR) Advisory Circulars, and other publications of the Federal Aviation Administration can be acquired from Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250-7954. Listing of current regulations can be obtained from http://www.faa.gov/avr/arm/
- Reliability Predictions for Electronic Systems National Technical Information Service Springfield, VA
- Bryant, Randal E. Graph-Based Algorithm for Boolean Function Manipulation IEEE Transactions on Computers Aug 1986