Kolip, Enes (2024) Improving Model-Based System Architecture Specification to Enable Fault Tree Analysis. Masters thesis, Concordia University.
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Abstract
The aviation industry explores innovative aircraft technologies and concepts aiming to reduce its emissions and meet environmental targets. The advanced technologies result in high complexity in aircraft systems, necessitating novel system architecting and safety assessment methods. Model-Based Systems Engineering (MBSE) presents a promising approach, offering more efficient systems development than document-centric methods. At the same time, safety assessment is an integral part of the system development process and can also benefit from a model-based approach. Model-Based Safety Assessment (MBSA) emerges to enable the analysis of the system architecture from a safety perspective and automate segments of the process, and by doing so, it improves efficiency by reducing development time and errors. The objectives of this thesis are to integrate MBSE and MBSA to construct a system model with an architecture specification that can help build safety models for fault tree analysis (FTA). This thesis focuses on the transition from system to safety models and explores various methods to enhance architecture specification in support of MBSA. The approach presented in this thesis utilizes the Capella workbench and extends the logical architecture levels of the Architecture Analysis and Design Integrated Approach (ARCADIA) to represent the system architecture at the appropriate level of granularity to support MBSA. The presented methodology involves enriching a system specification model by integrating safety properties into Capella elements with the help of the property values management tools (PVMT). The flap system is selected as a test case, and a system model of the flap control and actuation system is developed and used to construct safety models in the AltaRica 3.0 language. Specific failure scenarios are introduced by adding observers to the safety models, enabling FTA with AltaRica 3.0. The minimal cutsets and failure rates of the FTA are examined to validate the results of the safety analysis, ensuring the transition between the system and the safety model is correct. Overall, the presented thesis helps to improve coherence and collaboration between system and safety engineers designing complex systems, such as advanced flight control system architectures.
| Divisions: | Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical, Industrial and Aerospace Engineering |
|---|---|
| Item Type: | Thesis (Masters) |
| Authors: | Kolip, Enes |
| Institution: | Concordia University |
| Degree Name: | M.A. Sc. |
| Program: | Mechanical Engineering |
| Date: | May 2024 |
| Thesis Supervisor(s): | Liscouët-Hanke, Susan |
| Keywords: | MBSE, MBSA, FTA, Systems Engineering, Systems Architecting, Capella, AltaRica |
| ID Code: | 994053 |
| Deposited By: | Enes Kolip |
| Deposited On: | 24 Oct 2024 18:26 |
| Last Modified: | 24 Oct 2024 18:26 |
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