Model-based safety assessment with SysML and component fault trees: application and lessons learned

Munk, Peter; Nordmann, Arne

doi:10.1007/s10270-020-00782-w

Cited by 27 publications

(6 citation statements)

References 34 publications

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“…The use of fault-tree analysis to calculate system-failure probability bounds from qualitative data in an intuitive, fuzzy environment is presented in paper [31]. Meanwhile, in paper [32] the authors adopted component fault trees (CFTs) to support fault tree analysis, failure mode, and effect analysis as extensions of SysML models. Boolean decision support methods were presented in paper [33].…”

Section: Application Of the Methodology Of Multi-valued Logic Trees W...mentioning

confidence: 99%

Application of the Methodology of Multi-Valued Logic Trees with Weighting Factors in the Optimization of a Proportional Valve

Deptuła

Stosiak

Cieślicki

et al. 2022

Axioms

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Hydraulic valves are used to determine the set values of hydraulic quantities (flow rate, pressure, or pressure difference) in a hydraulic system or its part. This is achieved through the appropriate throttling of the stream flowing through the valve, which is automatically set by the operator (e.g., opening the throttle valve). The procedures for determining its static and dynamic properties were described using the example of modeling a two-stage proportional relief valve. Subsequently, the importance of the design and operational parameters was determined using multi-valued logic trees. Modeling began with the determination of equations describing the flow and movement of moving parts in a valve. Based on the equations, a numerical model was then created, e.g., in the Matlab/Simulink environment. The static characteristics were obtained as the result of a model analysis of slow changes in the flow rate through the valve. Various coefficients of logical products have not been taken into account in the separable and common minimization processes of multi-valued logic equation systems in any available literature. The results of the model tests can be used to optimize several types of hydraulic valve constructions.

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Section: Application Of the Methodology Of Multi-valued Logic Trees W...mentioning

confidence: 99%

Application of the Methodology of Multi-Valued Logic Trees with Weighting Factors in the Optimization of a Proportional Valve

Deptuła

Stosiak

Cieślicki

et al. 2022

Axioms

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“…Given the importance of safety engineering processes to the vehicle engineering process, one of the goals should be to ensure that they can be easily integrated to pre-existing safety manufacturing practices. The procedure for our method is depicted in Figure 1, beginning with the analyzed system specification [13][14][15][16]. Many levels of specificity could be correlated to a network, depending on what needs to be investigated, such as the entire electrical and electronic infrastructure, a motor performance that is implemented using multiple electronic control devices, a specific Engine Control Unit (ECU), ECU hardware, or an ECU programme.…”

Section: Related Workmentioning

confidence: 99%

A Model for the Safety Risk Evaluation of Connected Car Network

Syamsundararao¹,

Samatha

Pinjala

et al. 2022

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The automobile industry is preparing for what is now anticipated to be a big transition toward linked and autonomous vehicles. This introduces significant dangers both to individuals' privacy and to the intricate workings of electrical and electronic systems. Currently, the automotive industry has well-established and government-mandated safety risk management methods. They present an improved risk assessment methodology and demonstrate its validity with a real-world use case to facilitate the derivation of safety procedures and safety solutions for automotive integrated devices. This should make it simpler to ensure the safety of integrated vehicles. Some of the significant factors are the accessibility of functional safety to individuals who are not trained in safety and the appropriateness of existing techniques for said functional safety. The methodology that is used to assess the risks posed by properties and capacities includes a risk analysis as an essential component. The next step in the process of managing risks involves determining both the degree of risk and the magnitude of the potential impact. In this step, various different rules and requirements that are already in place are utilized to make any necessary adjustments. After much deliberation, a level of security has been settled on in order to facilitate the formulation of high-level security objectives. Due to the fact that this design has a good convergence with contemporary principles and criteria, it ought to be capable of being adequately suited to the prerequisites of the automotive sector.

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“…Munk et al also points out this fact and suggests performing Fault Tree Analysis using the internal block diagrams (system architecture) and activity diagrams. 26 In their study, Munk et al mention performing separate fault trees for both diagrams. While this approach helps to automate the analysis, we believe that if safety is the property of a system, all model information needs to be considered together to obtain a complete fault tree.…”

Section: Safety Analysis In External Toolmentioning

confidence: 99%

“…Munk et al. also points out this fact and suggests performing Fault Tree Analysis using the internal block diagrams (system architecture) and activity diagrams 26 . In their study, Munk et al.…”

Section: Introductionmentioning

confidence: 96%

Integration of systems design and risk management through model‐based systems development

Uludag

Evin

Gürbüz³

2022

Systems Engineering

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Model‐based systems engineering is a powerful methodology to develop safety‐critical systems. The use of the system model as a single source of truth for risk and dependability analysis results in a consistent and complete assessment. Besides, representation and logging of the assessment within the model result in a complete and up‐to‐date single source of information that can be used during the device certification as well. This paper aims to provide a comprehensive risk management SysML profile that includes interconnected safety analysis [functional hazard assessment (FHA), fault tree, and failure mode and effect analysis (FTA, FMEA)], control measure, and evaluation model elements in compliance with the medical standards. Model‐based risk assessment of a point‐of‐care diagnostic device for sepsis has been shown as a case study to show the implementation of the profile. This device is a standalone unit and the test results obtained directly affect the patient. Therefore, both the top‐down (FHA and FTA) and bottom‐up (FMEA) safety assessment methods have been used. Another objective of the study is to define a systematic and holistic method to perform fault tree analysis, not only from the system architecture models but also from the functional, activity, and sequence diagrams of the system model.

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Model-based safety assessment with SysML and component fault trees: application and lessons learned

Cited by 27 publications

References 34 publications

Application of the Methodology of Multi-Valued Logic Trees with Weighting Factors in the Optimization of a Proportional Valve

Application of the Methodology of Multi-Valued Logic Trees with Weighting Factors in the Optimization of a Proportional Valve

A Model for the Safety Risk Evaluation of Connected Car Network

Integration of systems design and risk management through model‐based systems development

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