An integrated design methodology for safety critical systems

Mhenni, Falda; Choley, Jean-Yves; Nguyen, Nga

doi:10.1109/syscon.2016.7490580

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…Hence, the integration of safety assessment into the systems engineering process is very important. To narrow the gap between SE and SA and thus enhance consistency and reduce late design changes, many research works dealt with the integration between MBSE and SA, such as in [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Improved Safety Analysis Integration in a Systems Engineering Approach

et al. 2019

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The goal of the paper is the integration of safety analysis in a model-based systems engineering approach to ensure consistency between system design and safety artifacts. This integration permits the continuous improvement of the structure and behavior of the system. It also reduces system development time and prevents late detection of errors. To reach this purpose, the SafeSysE methodology is extended. In SafeSysE, a preliminary Failure Mode and Effects Analysis (FMEA) is automatically generated from a SysML model, and this FMEA is then completed by the safety expert but no further development was proposed. The contribution of this paper is to suggest recommendations based on the FMEA analysis in order to enhance the system design and make it comply with safety requirements. First, an updated system structure that may contain redundancy is proposed. Then, a redundancy profile is used to enrich the system model with redundancy information, which will allow the generation of a dynamic fault tree considering the system behavior. Finally, the generated dynamic fault tree should be analyzed in order to create a state machine diagram that describes the behavior of the system. The created state machine with an internal block diagram will help the system designers to better understand the system dysfunctions by simulating the system. The proposed methodology is applied to an Electro-Mechanical Actuator system which is used in the aeronautics domain.

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