Automatic SysML-based safety analysis

Helle, Philipp

doi:10.1145/2432631.2432635

Cited by 24 publications

(15 citation statements)

References 8 publications

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“…A safety requirement is identified for the system function or component to prevent the hazard from occurring. However, the drawback of this approach or of any model-based safety analysis method that requires a model-to-model transformation [37]- [41], lies in the challenge of maintaining consistency between the safety artifact and the system design and safety model, as well as the increased possibility of data loss during the transformation [9], [43]. To the best of the authors' knowledge, model transformation of the safety artifact back to the safety model has not been implemented.…”

Section: Literature Reviewmentioning

confidence: 99%

An Integrated System Design and Safety Framework for Model-Based Safety Analysis

Krishnan

Bhada

2020

IEEE Access

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Safety analysis is often performed independent of the system design life cycle, leading to inconsistency between the system design and the safety artifact. Additionally, the process of generating safety artifacts is manual, time-consuming, and error-prone. As a result, safety analysis often requires rework , is expensive, and increases system development time. Several model-based systems engineering (MBSE) approaches have been developed to automatically generate certain safety artifacts. However, these approaches only cover part of the system design and safety life cycle. To truly leverage the benefits of MBSE, system design must be undertaken together with safety analysis for the entire life cycle, and multiple safety artifacts must be generated from the same model. Moreover, MBSE approaches that require a model transformation between the system design and the safety model suffer from the inability to automatically reflect changes made to a safety artifact in the system and the safety model. This paper presents a framework to integrate the entire system design and safety life cycle using an MBSE approach. Both the system design and the safety data are captured in a single SysML model, from which safety artifacts such as failure modes and effects analysis (FMEA) tables and fault trees are automatically generated. This framework ensures consistency between the system design and the safety analysis by requiring no model transformation, thus reducing the resources required for safety analysis. The proposed Integrated System Design and Safety (ISDS) framework comprises three phases that together cover the entire system design and safety life cycle. In this paper, the application of Phase 1 of the framework to a real-world case study is demonstrated. INDEX TERMS Model-based systems engineering (MBSE), safety analysis, fault tree analysis (FTA), failure modes and effects analysis (FMEA), systems engineering, hazard analysis, SysML

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Section: Literature Reviewmentioning

confidence: 99%

An Integrated System Design and Safety Framework for Model-Based Safety Analysis

Krishnan

Bhada

2020

IEEE Access

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“…For the integration of SA and MBSE, most of the works considered the extention of system models to enable the automatic generation of safety artifacts. In [12], Helle proposed a methodology that deals with the integration of the MBSA in the MBSE process. A SysML extension is created in order to include information about safety in the system model, which gives an opportunity to the systems expert to make some decisions without the assistance of the safety expert.…”

Section: State Of the Artmentioning

confidence: 99%

“…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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“…For instance, SysML [29] models (with a specific profile) can be used to automatically compute the system-level failure rates [30].…”

Section: Study Of Safety and Availability In Mechatronic Systemsmentioning

confidence: 99%