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How to use an Optimization-based Method Capable of Balancing Safety, Reliability, and Weight in an Aircraft Design Process
Mendeley, Br€oderna Ugglasgatan, SE-582 54 Linköping, Sweden.
Linköping University, Department of Management and Engineering, Machine Design. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Machine Design. Linköping University, Faculty of Science & Engineering.
2017 (English)In: Nuclear engineering and technology : an international journal of the Korean Nuclear Society, ISSN 1738-5733, E-ISSN 2234-358X, Vol. 49, 404-410 p.Article in journal (Refereed) Published
Abstract [en]

In order to help decision-makers in the early design phase to improve and make more cost-efficient system safety and reliability baselines of aircraft design concepts, a method (Multi-objective Optimization for Safety and Reliability Trade-off) that is able to handle trade-offs such as system safety, system reliability, and other characteristics, for instance weight and cost, is used. Multi-objective Optimization for Safety and Reliability Trade-off has been developed and implemented at SAAB Aeronautics. The aim of this paper is to demonstrate how the implemented method might work to aid the selection of optimal design alternatives. The method is a three-step method: step 1 involves the modelling of each considered target, step 2 is optimization, and step 3 is the visualization and selection of results (results processing). The analysis is performed within Architecture Design and Preliminary Design steps, according to the company’s Product Development Process. The lessons learned regarding the use of the implemented trade-off method in the three cases are presented. The results are a handful of solutions, a basis to aid in the selection of a design alternative. While the implementation of the trade-off method is performed for companies, there is nothing to prevent adapting this method, with minimal modifications, for use in other industrial applications.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 49, 404-410 p.
Keyword [en]
Aircraft Design, Early Design Phases, MOSART, Safety, Reliability, Trade-off
National Category
Production Engineering, Human Work Science and Ergonomics Embedded Systems Computer Sciences Computer Systems Reliability and Maintenance
Identifiers
URN: urn:nbn:se:liu:diva-134591DOI: 10.1016/j.net.2017.01.006ISI: 000401102000015OAI: oai:DiVA.org:liu-134591DiVA: diva2:1075463
Note

Funding agencies: MOSART - Saab Aeronautics and the National Aviation Engineering Research Program [NFFP6 2013-01223]; Swedish Armed Forces; Swedish Defense Materiel Administration; Swedish Governmental Agency for Innovation Systems

Available from: 2017-02-20 Created: 2017-02-20 Last updated: 2018-01-13Bibliographically approved
In thesis
1. Multiobjective Optimization for Safety and Reliability Trade-off: Applications on Early Phases of Aircraft Systems Design
Open this publication in new window or tab >>Multiobjective Optimization for Safety and Reliability Trade-off: Applications on Early Phases of Aircraft Systems Design
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

A strategic issue for any industrial company is to conceive safe and reliable systems while performing all systems’ intended functions at a minimum cost. System safety and reliability are fundamental to system design and involve a quantitative assessment prior to system development. Aircraft design is a multifaceted process that involves several different disciplines, system safety and reliability among them, to obtain o holistic approach of a complex product. During the last decades, the idea of trade-off between safety or reliability goals against other characteristics has become more prominent. Furthermore, while predictions of system performance can be made in early design phases with credible precision, within reasonable tolerances, reliability and system safety are seldom predicted with high accuracy and confidence. Making the right design decisions in the early design phase is vital to the success of a project. Nowadays, it is essential within the design of new products, to increase awareness (knowledge) early in the design phases and keep the design decisions (freedom) open as long as possible, and with that also keep down the allocated costs.

This thesis presents MOSART (Multiobjective Optimization for Safety and Reliability Trade-off), a method promoting a systematic approach regarding trade-offs between system safety and reliability goals against other contradictory targets, such as weight and cost, in early design phases.

A theoretical framework and context are presented in the first part of the thesis, including system safety and reliability methods and optimization techniques. The second and third parts are dedicated to contributions and papers, where seven papers are included. These papers approach different aspects of MOSART, from the basic idea to the implementation and usage of the method in the conceptual phase of aircraft systems design. Several aspects regarding the choice of system safety and reliability methods in early design phases are also included in the papers, e.g. evaluation of applicability of reliability methods in early design phases, considerations around the usage of these methods within the MOSART framework and a proposal of a guideline for how to choose the right reliability method. All the examples used in the papers are chosen from basic aircraft sub-systems.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2017. 89 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1833
National Category
Production Engineering, Human Work Science and Ergonomics Embedded Systems Other Engineering and Technologies not elsewhere specified Computer Systems Design
Identifiers
urn:nbn:se:liu:diva-134592 (URN)9789176855768 (ISBN)
Public defence
2017-03-23, C3, C-huset, Campus Valla, Linköping, 10:15 (English)
Opponent
Supervisors
Funder
VINNOVA
Note

The research project has been financed by the researchprogrammes NFFP5 2009-01316 and NFFP6 2013-01223 funded by Saab Aeronautics and theNational Aviation Engineering Research Program (NFFP), jointly driven by the Swedish ArmedForces, the Swedish Defence Materiel Administration (FMV),

Available from: 2017-02-20 Created: 2017-02-20 Last updated: 2017-02-20Bibliographically approved

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Nuclear engineering and technology : an international journal of the Korean Nuclear Society
Production Engineering, Human Work Science and ErgonomicsEmbedded SystemsComputer SciencesComputer SystemsReliability and Maintenance

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