نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه مهندسی صنایع و مکانیک دانشگاه آزاد اسلامی والحد قزوین

2 دانشجوی کارشناسی ارشد گروه مهندسی صنایع و مکانیک دانشگاه آزاد اسلامی واحد قزوین

چکیده

در این مقاله مدل جدیدی برای مسئله تخصیص افزونگی با ساختار سری موازی و زیر سیستمهای - k-out-of-n با در نظر گرفتن نرخ خرابی وابسته به تعداد اجزای در حال کاار اراهاه ما یشاود .در ایان ناون نارخ خرابای باا
افزایش تعداد اجزای در حال کار به دلیل تقسیم بار )فشار( بر روی تعداد بیشتری از اجزاء، نرخ خرابی هر یا ک
از اجزاء کاهش مییابد. همچنین برای هر یک از زیر سیستمها دو نون سیاست افزونگی آمااده باه کاار سارد و
فعال در نظر گرفته شده است. هدف از حل مدل اراهه شده تعیین استراتژی افزونگی، ناون و تعاداد جازء ماازاد
تخصیص یافته برای هر زیرسیستم به منظور حداکثر کردن قابلیت اطمینان کال س یساتم تحات محادود یتهاا ی
وزن و هزینااه ماایباشااد. بااه دل یاال NP-hard بااودن مساائله تخصاا یص افزونگاای از الگااوریتم فاارا ابترااار ی
ژنتیک) GA (برای حل مدل و از روش سطح پاسخ) RSM ( برای تنظیم پارامترهای موثر بار ا یا ن الگاور یتم اساتفاده
شده است. در انتها با ذکر یک مثال عددی به بررسی نتایج به دست آمده از حل مدل اراهه شده میپردازیم

کلیدواژه‌ها

عنوان مقاله [English]

Reliability optimization of a series-parallel k-out-of-n system with failure ratedepends on working system components

نویسندگان [English]

  • Mani sharifi 1
  • Ghasem cheragh 2

چکیده [English]

This paper presents a mathematical model for a redundancy allocation problem (RAP) for the series-parallel system with k-out-of-n subsystems and failure rate depends on working components of system. It means that failure rate of components increases when a component fails. The subsystems may use either active or cold-standby redundancy strategies, which considered as a decision variable for individual subsystems. Thus, the proposed model and solution methods are to select the best redundancy strategy among active or cold-standby, component type, and levels of redundancy for each subsystem. The objective function is to maximize the system reliability under cost and weight constraints. To solve the model, since RAP belongs to Np-Hard class of the problems, one effective meta-heuristic algorithm named genetic algorithm (GA)is proposed. Then, response surface methodology is applied for algorithm parameter tuning.Finally, we consider the results of solving presented model with a numerical example

کلیدواژه‌ها [English]

  • Redundancy Allocation Problem
  • k-out-of-n sub-systems
  • redundancy strategy
  • failure rate depends on working components
  • GA
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