Hasil Pencarian  ::  Simpan CSV :: Kembali

"This book presents state-of-the-art probabilistic methods for the reliability analysis and design of engineering products and processes. It seeks to facilitate practical application of probabilistic analysis and design by providing an authoritative, in-depth, and practical description of what probabilistic analysis and design is and how it can be implemented. The text is packed with many practical engineering examples (e.g., electric power transmission systems, aircraft power generating systems, and mechanical transmission systems) and exercise problems. It is an up-to-date, fully illustrated reference suitable for both undergraduate and graduate engineering students, researchers, and professional engineers who are interested in exploring the fundamentals, implementation, and applications of probabilistic analysis and design methods."

"Kehandalan merupakan suatu pertimbangan penting yang tidak dapat terpisahkan lagi pada industri kertas, terutama pada hal pemeliharaan. Pemeliharaan yang baik ketika direncanakan dengan baik dan disesuaikan dengan kebutuhan mesin atau peralatan. Masalah yang dihadapi pada Paper Machine pada PT Indah Kiat Pulp & Paper Tbk Tangerang adalah rendahnya tingkat kehandalan. Adapun tujuan dari penelitian ini adalah untuk mengidentifikasi subsistem kritikal penyebab rendahnya kehandalan dan untuk mengetahui interval Planned Shutdown Maintenance yang optimal. Dengan menggunakan data kegagalan mesin dan dengan menggunakan Software Weibbul++7 maka bisa diperoleh perkiraan kehandalan masing-masing subsistem untuk interval waktu yang berbeda. Dari perkiraan kehandalan tersebut dan dengan menggunakan Reliability Importance Measure maka dapat diidentifikasi kritikal subsistem. Dengan menggunakan perkiraan kehandalan pula dapat dicari interval Planed Scheduled Maintenance yang optimal dan bisa dicari pula proyeksi ketersediaan. Hasil analisa menunjukkan bahwa Press Part merupakan subsistem paling kritikal, kemudian disusul Dryer Part dan yang terakhir adalah Wire Part. Sedangkan untuk interval pemeliharaan yang optimal didapat pada interval 240 jam atau 3 kali tiap bulan. Dengan interval ini diproyeksikan akan mampu menurunkan frekuensi frekuensi kegagalan dari 424 kali menjadi 147 kali, menurunkan durasi kegagalan turun dari 514 jam menjadi 176 jam dan meningkatnya ketersediaan dari 95.5% menjadi 97.35%.

---

Reliability is an important consideration that can not be separated at paper industry, especially in maintenance. The right maintenance is when well planned and adjusted to the need of machinery or equipment. The problems faced at Paper Machine of PT Indah Kiat Pulp & Paper Tbk Tangerang is low reliability. The purpose of this study is to identify the critical subsystems that causes low reliability and to determine the optimal interval of scheduled planned shutdown maintenance.

By using the paper machine failure data and Weibbul Software + +7 then can be obtained the reliability estimation for each subsystem for different time intervals. By using reliability estimation for each subsystem and using Reliability Importance Measure then critical subsystem can be identified. By using the reliability estimation also can be define optimal Scheduled Planed Maintenance interval and can be also define the projected availability.

As a results of the analysis show that the Press Part is the most critical subsystem, and then followed by Dryer Part and the last is the Wire Part. Then the optimal Scheduled Planed Maintenance interval found at interval of 240 hours or three times for every month. With this interval is projected to be able to reduce the frequency of failure from 424 times to 147 times, reducing the duration of failure from 514 hours to 176 hours and increasing availability from 95.5% to 97.35%."

"Communications-Based Train Control (CBTC) merupakan salah satu jenis persinyalan modern yang berbasis pada komunikasi dua arah menggunakan gelombang radio antara perangkat Wayside dengan perangkat On-Board. Belum banyak sistem perkeretaapian di berbagai negara yang menggunakan sistem persinyalan ini. Salah satunya dikarenakan sistem yang serba otomatis membuat banyak komponen yang perlu dilakukan perawatan agar tidak terjadi Failure. Untuk itu diperlukan sebuah penilaian pada Failure tersebut sehingga dapat diketahui tingkat keparahan. Berfokus pada perangkat On-Board CBTC metode Reliability Centered Maintenance (RCM) digunakan sebagai upaya untuk mengetahui tingkat keparahan pada Failure yang terjadi dan kebutuhan perawatan perangkat On-Board CBTC. Motode FMEA dan FTA juga menjadi bagian dalam metode RCM untuk dapat melakukan penilaian. Diperoleh bahwa Remote Input Output (RIO) menjadi peralatan yang sering mengalami gangguan, dalam keadaan parah menyebabkan Emergency brake dan mengancam keselamatan penumpang. Diketahui bahwa laporan petugas lapangan sering kali kurang jelas dan ada perbedaan arahan dari OC berdampak pada penanganan tidak maksimal. Lebih lanjut sebagai tujuan dari penelitian ini selain pada kebutuhan perawatan perlu dibuat juga pedoman dalam bentuk Standard Operating Procedure (SOP) penanganan Failure ketika terjadi di lapangan saat jam operasional. SOP yang ada akan diturunkan menjadi Instruksi Kerja (IK) untuk dapat menyamakan persepsi pada setiap tim dalam bekerja.

---

Communications-based train control (CBTC) is a type of modern signalling based on two-way communication using radio waves between Wayside devices and On-Board devices. There are not many railway systems in various countries that use this signaling system. One of them is because the fully automated system makes many components that need to be maintained so that Failure does not occur. For this reason, an assessment of the Failure is needed so that the severity can be known. Focusing on On-Board CBTC devices, the Reliability Centered Maintenance (RCM) method is used as an effort to determine the severity of Failures that occur and the maintenance needs of CBTC On-Board devices. FMEA and FTA methods are also part of the RCM method for conducting assessments. It was found that Remote Input Output (RIO) became equipment that often experienced interference, in severe circumstances causing Emergency brakes and threatening passenger safety. It is known that field officer reports are often unclear and there are different directions from the OC resulting in not optimal handling. Furthermore, as the purpose of this study, in addition to maintenance needs, it is also necessary to make guidelines in the form of Standard Operating Procedures (SOP) for handling Failure when it occurs in the field during operational hours. The existing SOP will be reduced to Work Instructions (IK) to be able to equalize perceptions in each team at work."

"This book describes the growing field of multi-criteria decision making (MCDM) as applied to materials selection in product design. Useful in academic and research contexts, as well as to practitioners in materials engineering and design, it aids readers in producing successful designs by improving the decision-making process in materials selection.It is a constant challenge for designers, even when educated in the fundamentals of materials and mechanical engineering, to select the best materials to satisfy complex design problems. Current approaches to materials selection range from the use of intuition and experience to computer-based methods including electronic databases and search engines. Increasingly, MCDM methods are proving effective in materials selection for complex design problems. These methods supplement existing quantitative methods, such as selection charts, by allowing simultaneous consideration of design attributes, component configurations and types of material."