THE MODEL OF QUANTITATIVE ASSESSMENT OF TECHNICAL SYSTEM RELIABILITY


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Abstract

The paper considers the reliability – one of the characteristics of technical systems in manufacturing engineering. It is determined that the reliability weakness of technical systems causes the equipment breakdown. The authors enumerate the consequences of the equipment breakdown for the technical systems in the whole and note that various protection devices are provided to prevent serious consequences of the equipment breakdown. Technical system image has hierarchical structure changing over time. It is determined that the boundary condition of modeling of protection devices for technical systems is that the subsystems, the internal parameters of which are interrelated, are the functional protection system for technical systems. At the same time, the external links are strictly limited and defined. The authors considered the varieties of registered parameters and sub-varieties for technical systems and developed the mathematical model for quantitative assessment of protection devices. The model for all protection devices included in the considered object model is formed that makes possible to assess numerically the reliability of the technical system. The authors suggested the method of assessment of technical systems reliability on the base of analysis of possible breakdowns of the equipment and protection devices that allows preventing or minimizing the consequences of these breakdowns and developed the methodology, which on the base of protection devices model allows determining their necessary quantity and types at the system preset reliability in the whole. To describe formally the systems of protection devices, the set-theoretical concepts are used. The authors introduced the functional description of regulation, blocking and protection to characterize the technical systems protection devices and developed the model of the system (higher hierarchy level) for all protection devices included in the considered model of the object.  

About the authors

Ekaterina Mikhailovna Luzhaeva

Samara State Technical University, Samara

Author for correspondence.
Email: bjd@list.ru

postgraduate student of Chair “Life safety”

Russian Federation

Еkaterina Nikolaevna Yagovkina

Samara State Technical University, Samara

Email: bjd@list.ru

postgraduate student of Chair “Life safety”

Russian Federation

Tatyana Yurievna Freze

Togliatti State University, Togliatti

Email: freze@tltsu.ru

PhD (Economics), Associate Professor, assistant professor of Chair “Management of industrial and environmental safety”

Russian Federation

References

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