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Identifying enhancement potentials of actuation systems using a criticality index

Akoto Chama, Leonel and Bertram, Oliver (2018) Identifying enhancement potentials of actuation systems using a criticality index. 8th Internation Conference on Recent Advances in Aerospace Actuation Systems and Components R3ASC'18, 30. Mai - 01. Juni 2018, Toulouse, France.

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Abstract

The potential benefits of multifunctionality drives the design of flight control systems today. For instance, the flaps of the A350XWB used in providing high lift, are additionally used for span-wise lift distribution to reduce wing loads. Hence, the underlying control surface actuation systems must be designed to accomodate these new and future functionalities. Because of the high complexity of these safety-critical systems this poses many challenges, which may cause certain conceptual drawbacks go unmitigated by the designer. Thus, incurring costly design changes later in the design process or in the worst case catastrophic failures in different operational phases. In order to identify potential weakness of the system architectures early in the design process, this study proposes the use of the Criticality Index (CI) within the design structure matrix framework as a method to analyse the functional model during concept development. Using the Functional Hazard Index and the Failure Propagation Index as inputs, the CI quantifies the failure impact of subsystem functions on the overall architecture. To demonstarate its applicability, the method is used to identify enhancement opportunities for two actuation system architectures.

Item URL in elib:https://elib.dlr.de/124958/
Document Type:Conference or Workshop Item (Lecture)
Title:Identifying enhancement potentials of actuation systems using a criticality index
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Akoto Chama, Leonelleonel.akoto (at) dlr.deUNSPECIFIED
Bertram, Oliveroliver.bertram (at) dlr.deUNSPECIFIED
Date:2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Actuation system, architecture, analysis, criticality index, failure propagation index, function hazard analysis, multifunctional flight control
Event Title:8th Internation Conference on Recent Advances in Aerospace Actuation Systems and Components R3ASC'18
Event Location:Toulouse, France
Event Type:international Conference
Event Dates:30. Mai - 01. Juni 2018
Organizer:School of mechanical Engineering of the Institut National des Sciences Appliquee and the Institut Clement Ader laboratory
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Safety Critical Systems&Systems Engineering
Deposited By: Akoto, Leonel Chama
Deposited On:13 Dec 2018 11:53
Last Modified:13 Dec 2018 12:38

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