مدل تعمیر و نگهداری پیشگیرانه بهینه برای سیستم‌های سه وضعیتی

نویسندگان
1 دانشگاه اصفهان
2 دانشگاه شیراز
چکیده
در این مقاله یک سیستم سه وضعیتی با وضعیت‌های عملکرد کامل، عملکرد جزیی و شکست کامل در نظر گرفته می‌شود. همچنین فرض می‌شودکه سیستم دارای n مؤلفه دو وضعیتی است. برای این سیستم با در نظر گرفتن شرایط مختلف روی وضعیت‌های سیستم، ابتدا توابع میانگین عمر شرطی محاسبه می‌گردد. سپس با استفاده از توابع میانگین عمر شرطی، یک مدل تعمیر و نگهداری پیشگیرانه برای سیستم پیشنهاد و تابع هزینه در واحد زمان برای آن محاسبه می‌‌شود. هدف از ارائه مدل پیشنهادی، محاسبه زمان بهینه برای انجام تعمیر پیشگیرانه است که متوسط هزینه در واحد زمان را مینیمم می‌کند. در نهایت برای نشان دادن کاربردی از مدل پیشنهادی برخی مثال‌های عددی ارائه می‌گردد.
کلیدواژه‌ها

عنوان مقاله English

Optimal preventive maintenance model for three-state systems

نویسنده English

Somayeh Ashrafi 1
1 University of Isfahan
2 Shiraz University
چکیده English

In this paper, it is considered a three-state system with states complete performance, partial performance, and complete failure. It is also assumed that the system has n two-state components. For this system, under different assumptions on the system states, the conditional mean life functions are calculated. Then, a preventive maintenance model is peoposed for the considered system and the cost function per time unit is calculated. The aim of presenting the proposed model is to calculate the optimal time for preventive maintenance that minimizes the average cost per unit of time. Finally, some numerical examples are given to show the application of the proposed model.

کلیدواژه‌ها English

Two-dimensional signature
Reliability
mean conditional life
emergency repair
average cost per time unit
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