دانلود مقاله ISI انگلیسی شماره 27840
ترجمه فارسی عنوان مقاله

# تجزیه و تحلیل سیستم جهت دار واقعه

عنوان انگلیسی
Event oriented system analysis
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
27840 2000 15 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Probabilistic Engineering Mechanics, Volume 15, Issue 3, July 2000, Pages 261–275

ترجمه کلمات کلیدی
مهندسی - مکانیک - تجزیه و تحلیل سیستم - سیستم حوادث - احتمالات - قابلیت اطمینان - آنتروپی - اطلاعات - عدم قطعیت
کلمات کلیدی انگلیسی
Engineering, Mechanics, System analysis, System of events, Probability, Reliability, Entropy, Information, Uncertainty
پیش نمایش مقاله

#### چکیده انگلیسی

This article presents an attempt towards a probabilistic event oriented system analysis in engineering. Engineering systems are represented as either complete or incomplete systems of events and as compounds of various subsystems of events. The event oriented system analysis investigates important subsystems in engineering systems, such as operational modes and failure modes and their interrelations. The analysis is also applicable to engineering systems with various relations among the sets of events, such as mutually exclusive and inclusive sets. Further, the systems and subsystems are subjected to probability and uncertainty analysis. The system uncertainty analysis is based on entropy. General relations among the probability, uncertainty of the system and uncertainties of the subsystems are derived by using information theory. Specific mathematical aspects and available methods in the uncertainty modelling of systems and subsystems are summarised. Numerical examples confirm the relevance of the event oriented system analysis and indicate potential improvements in system design.

#### مقدمه انگلیسی

Each object can be viewed as a system in different ways. An object is often a part or subsystem of a more complex system. The object itself can consist of many components and possibly of more subsystems. Systems in engineering are often viewed as objects of many discrete interacting components with uncertain capabilities. Moreover, systems are subjected to uncertain external demands. Sometimes, the components are grouped into a number of subsystems, each of them pertaining to some specific characteristic function of the system. Subsequently, many systems can be assumed to depend only on the current states of their components. Complex engineering systems can be subjected to service modes and effects analysis in order to identify the events that can occur at the component, subsystem and system levels. The goals of such an analysis are to determine the effects of known operational and failure modes on the overall behaviour of the systems [3], [8] and [11]. In addition to operational modes and effects analysis, semiquantitative and quantitative methods can be applied to predict the probabilities of safe operation or the accidents [10]. Redundancies [5] and [6] and robustness [4] can also be considered. Service modes and effects analysis is an essential step towards understanding complex systems without which reliability and uncertainty analysis cannot be performed. The procedures presented in this article are applied in addition to the traditional system analysis for the solution of practical numerical examples in engineering. The aim is to demonstrate the usefulness of the event oriented system analysis as a tool for assessment of system performances and improvements of engineering system design with respect to system uncertainties.