بعض التقنيات لزيادة موثوقية الأنظمة

الباحث

كاظم عبدالباري مزبان

المشرف

زاهر عبدالهادي حسن

الجامعة

جامعة بابل

الكلية / القسم

كلية التربية للعلوم الصرفة / الرياضيات

الشهادة

دبلوم عالي

السنة

2023

لغة الرسالة

انكليزي

الكلمات المفتاحية

System Reliability ; Reliability Allocation ; Optimization Techniques ; Complex Systems

في هذا البحث، نختبر تعيين الموثوقية للأنظمة المختلطة باستخدام تقليل عملية الوحدة المتسلسلة ، مم يسمح بتبسيط هذه الأنظمة إلى حساب أبسط لنظام السلسلة. كما قدمنا تقنيتين من أجل معالجة تخصيص الموثوقية للنظام المختلط وأيضًا ، سننظر في أهمية كل وحدة في نظام مختلط ونحاول تقدير تأثيرها على الأداء العام للنظام اعتمادًا على أهميتها. سنشرح أيضا كيفية استخدام تقنية إضافة لتعزيز كفاءة الوحدات التي لها تأثير أكبر على الأداء العام للنظام أكثر من غيرها.

In this research, we test the assignment of reliability for mixed systems by using series unit process reduction, which allows to simplify these systems to simpler computation for series system. Also, we introduced two techniques in order to addressed the reliability allocation for mixed system. Also, we will look at the importance of each unit in a mixed system and attempt to estimate the impact of their effect on the system's overall performance depending on their importance. We will also demonstrate how to use an addition technique to enhance the efficiency of the units that have a greater impact on the system's overall performance than others. Introduction The vital importance of reliability in a number of systems draws many researchers to reliability engineering [16]. For design issues with reliability criteria, a lot of work has been performed, and a number of techniques have been used. According to Tzafestas in 1980, one of the undeniable phases in the design of such multi-component structures is the problem of using usable tools. most cost-effective way to increase overall system efficiency or decrease resource consumption while achieving specific reliability goals [17]. The variety of system configurations, resource limitations, and options for optimizing performance have prompted the creation and analysis of several optimization models. On a regular basis, surveys on improving reliability have been written. One of the most recent publications on the subject is Kuo et albook. Several studies have been conducted to improve parallel–series systems, however, only a handful have focused on series–parallel systems. The bulk of these works are on Jensen's redundancy allocation system from 1968 [18]. use complex programming for series–parallel–series networks He believes the networks under scrutiny are made up of a series of blocks, each of which is made up of related technology that work in concert. In multi-state series–parallel systems, Marquez and Coit recently introduced a heuristic for allocating redundancy. They proposed a novel solution strategy that has a number of distinct advantages over conventional approaches to the problem [19, 20]. Levitin et al., Zuo Hoang Pham, and Venugopal all suggest solutions to the problem of redundancy optimization in general. The subject of this series–parallel systems is the reliability allocation problem, in which the reliability of the modules must be calculated in order to reduce the utilization of a resource under a reliability constraint. When several technologies of the same purpose are used in parallel, this issue occurs [20, 21]. In 1972, Kim, Y. H., et al gave the algorithm a list of possible routes from the source to the graph sink to calculate system reliability based on route data. A network is reliable when a route connects every pair of nodes. Reliability analysis of networks such as networks for computer architecture and data communication networks. In 2015, Hassan, Z. A. H. and Balan, V. [46 ] introduced the quadratic case of reliability, to make use the convex/concave mutual dependence of slice components along the curves of constant-slice reliability, in order to maintain or increase the circuit reliability. Clear techniques of engineering to evaluate the reliability of electrical systems used in aircraft show that elements of reliability must be linearly based on time [36 ] In 2016, Mutar, E. K.,and Hassan, Z. A. H. presented reliability of oxygen supply system for spacecraft and some engineering characteristics [35]. Hassan, Z. A. H.and Mutar, E. K., have presented geometry of reliability models of lectrical system usedinside spacecraft In 2019, Sulaiman, H.K., and Hassan, Z. A. H., introduced a study of mathematical models in reliability of networks, The researchers have introduced accurate ways to calculate reliability complex systems to calculate the reliability of the electromagnetic system inside aircraft and some engineering features. Also, the researcher has studied some ways to allocate reliability to the subsystem. As well as studying the reliability allocation and optimization of the reliability of the electromagnetic system within an aircraft by the genetic algorithm and the particle swarm optimization[50] . The goal of this research is to calculate the reliability of the mixed system and improve the reliability of each components, and we used some methods to increase the reliability of the mixed system. This research consists of four chapters; Chapter One contains some definitions and concepts. Chapter Two is the study of certain types of systems that work to clarify the idea of the function of the structure. Chapter Three contains some ways to solve the mixed system.Chapter four contains of conclusions and future works .

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