اثرات بهینه‏سازی RAM زیرساخت انتقال نوری راه‌آهن در کاهش مسدودی خط

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مدیریت فناوری اطلاعات، واحد قشم ، دانشگاه آزاد اسلامی ، قشم، ایران.

2 گروه مهندسی مخابرات ، دانشکده برق و کامپیوتر، واحد یادگار امام خمینی (ره) شهرری، دانشگاه آزاد اسلامی ، تهران ، ایران

3 گروه مدیریت صنعتی، دانشکده مدیریت ، واحد تهران مرکز ، دانشگاه آزاد اسلامی ، تهران ، ایران

10.22075/jtie.2021.23150.1529

چکیده

سیر و حرکت ایمن آلات ناقله ریلی بدون سیستم‏های کنترل قطار امکان‏پذیر نمی‏باشد. سیستم‏های کنترل قطار در حمل و نقل ریلی متضمن ایمنی هستند و در افزایش سرعت و ظرفیت حمل و نقل نقش حیاتی ایفا می­کنند، به­طوری که از کار افتادن کل و یا بخشی از آن می­تواند موجب اختلال ایمنی، کاهش بهره‏وری و افزایش مسدودی خط گردد. با توجه به اینکه کلیه سرویس­های مخابراتی کنترل قطار بر بستر شبکه‏های انتقال نوری هستند، قطع شدن این شبکه‏ها موجب قطع شدن کلیه سرویس­های کنترل قطار و در نتیجه مسدودی خط می­گردد. لذا، ارتقای پایداری زیرساخت انتقال نوری بسیار ضروری می­باشد. در این تحقیق، به­منظور پیش‏بینی تعداد مسدودی بر اثر قطعی زیرساخت انتقال، در دو مرحله به بررسی شبکه انتقال نوری ریلی پرداخته می­شود. در مرحله نخست، پارامترهای Reliability، Availability و Maintainability (RAM) شبکه انتقال نوری راه‏آهن، ارزیابی  شده و رفتار شبکه، از طریق متد مونت کارلو شبیه­سازی و تحلیل می­شود. در مرحله دوم تحقیق، با پیاده­سازی مدل کاهش زمان تعمیر خرابی شبکه، مجدداً مکانیزم RAM محاسبه و شبیه­سازی می­شود. در هر دو مرحله، احتمال خاموشی شبکه مخابراتی راه­آهن و تعداد مسدودی خط به‏دست آمده است. پیش­بینی تعداد خاموشی­های شبکه و مسدودیت خطوط راه­آهن به دلیل قطع سرویس­های کنترل قطار برای نخستین بار به صورت فعالیت تحقیقاتی انجام شده است. نتایج این تحقیق نشان داد که کاهش 10 درصدی زمان تعمیر شبکه منجر به افزایش 5/3 برابری سطوح مکانیزم RAM و کاهش 70 درصدی مسدودی خطگردید. این نتایج ارزش بسیار زیادی در افزایش بهره­وری سیستم و نیز رضایتمندی کاربران خواهد داشت.

کلیدواژه‌ها


عنوان مقاله [English]

Impact of the Optimization the RAM of the Railway Optical Transmission Infrastructure on Reducing the Line Blockage

نویسندگان [English]

  • maziar yazdani 1
  • saeed Ghazi-Maghrebi 2
  • Mohammad Ali Afshar kazemi 3
1 consultant of railway company
2 Deen of Islamic Azad University- Yadegar-e-Imam Khomeini (RAH) Share Rey
3 Associate Professor, Department of Industrial Management, Central Tehran Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

The safe movement of the rail rolling stock is not possible without train control systems. Train control systems ensure safety somehow and they play a vital role in increasing the speed and the capacity of the transport; So that, the failure of the whole or part of it can cause safety disruption, reduce productivity and increase line blockage. Due to the fact that all train control telecommunication services are based on optical transmission networks, the interruption of these networks will cause the interruption of all train control services and as a result, the line will be blocked. Therefore, evaluating and improving the sustainability of the optical transmission infrastructure is essential. In this research, in order to predict the number of the blockages due to the disruption of the transmission infrastructure, the rail transmission network is evaluated in two stages. In the first stage, the parameters of Availability, Reliability and Maintenance (RAM) of the railway transmission network are evaluated, and are simulated using the Monte Carlo method. In the second phase, the RAM mechanism is simulated again by implementing a network failure repair reduction model. In both stages, the probability of the shutdown of the railway telecommunication network, the numbers of blocked lines have been obtained. Predicting the number of network outages and rail line blockages due to the interruption of train control services has been conducted for the first time in research. The results of this study showed that a 10% reduction in network repair time led to a three-and-a-half-fold increase in RAM levels and a 70% reduction in line blockage. These results will be of great value in increasing system efficiency as well as the satisfaction of the users.

کلیدواژه‌ها [English]

  • Reliability
  • Availability
  • Maintenance
  • Railway Optical Transmission Infrastructure
  • Line Blockage
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