MBSE Assisted Functional Failure Modes and Effects Analysis for Laser Interferometer Space Antenna (LISA) Mission

This master's thesis introduces two methodologies for conducting functional Failure Modes and Effects Analysis (FMEA), namely static model-supported and executable model-based FMEA, that utilize a system architecture model implemented through Model-Based Systems Engineering (MBSE) with SysML (Systems Modeling Language). These two methodologies are investigated and compared with a traditional document-based method, based on a specific set of criteria, in a selected operational scenario within the Laser Interferometer Space Antenna (LISA) Mission. The thesis establishes a system architecture model that incorporates model elements, traceability links, and executable diagrams to depict functional architecture, interfaces, parameters, behaviours, and constraints with links to functional requirements and technical components. In the static model-supported FMEA, this model assists FMEA activities by automating input creation and providing convenient access and storage of FMEA table and entries. The executable model-based FMEA builds upon this by simulating operational scenarios with failures injected into each function, thereby automatically revealing the effects of these failures on the LISA spacecraft constellation. Through case studies and criteria-based qualitative assessment, the thesis investigates and compares the model-based approaches against a traditional document-based method, highlighting their advantages in enhancing FMEA activities and providing recommendations to address limitations. As a result, the research demonstrates the superiority of the executable model-based FMEA approach for complex space science missions like LISA. This thesis contributes to the field of space systems engineering by offering a novel MBSE-assisted FMEA methodology and highlighting the benefits of a model-based approach in improving FMEA.     «

This master's thesis introduces two methodologies for conducting functional Failure Modes and Effects Analysis (FMEA), namely static model-supported and executable model-based FMEA, that utilize a system architecture model implemented through Model-Based Systems Engineering (MBSE) with SysML (Systems Modeling Language). These two methodologies are investigated and compared with a traditional document-based method, based on a specific set of criteria, in a selected operational scenario within the...     »