The Experts below are selected from a list of 269898 Experts worldwide ranked by ideXlab platform
Juny Astuti - One of the best experts on this subject based on the ideXlab platform.
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analisis risiko operasional kegagalan mesin shaving dengan metode fault tree analysis fta dan Loss Distribution approach lda
Jurnal Rekayasa dan Manajemen Sistem Industri, 2017Co-Authors: Juny Astuti, Arif Rahman, Dwi Hadi SulistyariniAbstract:Jika membutuhkan abstrak atau isi jurnal silahkan menghubungi author melalui email junyastuti06@gmail.com, posku@ub.ac.id, dwihadi@ub.ac.id.
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analisis risiko operasional risiko operasional kegagalan mesin shaving dengan metode fault tree analysis fta dan Loss Distribution approach lda
2017Co-Authors: Juny AstutiAbstract:PT Kasin merupakan perusahaan manufaktur yang bergerak di bidang penyamakan kulit dengan salah satu jenis produk yang dihasilkan yaitu kulit box. Produk kulit box ini memiliki tingkat kompleksitas yang cukup tinggi dibanding produk kulit lainnya, sehingga diperlukan penggunaan alat dan mesin tertentu yang tergabung dalam departemen kulit box. Namun masalah yang dihadapi PT Kasin adalah tingginya jam berhenti pada salah satu mesin departemen kulit box yaitu mesin shaving sebesar 58,5 jam atau 27% dari total jam berhenti seluruh mesin di departemen kulit box. Selain jam berhenti yang cukup tinggi, mesin shaving juga mengalami frekuensi kegagalan dan biaya penanganan tertinggi dibandingkan mesin lainnya di departemen kulit box.Hal ini, secara langsung dapat mengganggu kelancaran proses produksi dan secara tidak langsung dapat menimbulkan kerugian terhadap finansial perusahaan. Permasalahan tersebut merupakan salah satu jenis risiko operasional ditinjau dari segi kegagalan proses internal dan kegagalan sistem. Oleh karena itu diperlukan penerapan manajemen risiko operasional yang sesuai untuk mengantisipasi kegagalan-kegagalan yang mungkin akan terjadi di masa mendatang Dalam penelitian ini, metode pengukuran risiko operasional digunakan yaitu fault tree analysis (FTA) dan Loss Distribution approach (LDA). Metode FTA digunakan untuk mencari akar penyebab masalah (basic event) melalui identifikasi setiap event komponen yang menyebabkan kegagalan mesin shaving. Sedangkan metode LDA merupakan salah satu tool pengukuran kerugian risiko operasional yang digunakan untuk mengestimasi seberapa besar biaya kerugian yang ditimbulkan jika terjadi kegagalan di masa mendatang. Adapun data yang digunakan dalam pengukuran risiko operasional yaitu data historis berupa data distribusi frekuensi yaitu data yang menunjukkan seberapa sering kegagalan komponen mesin shaving terjadi, dan distribusi severitas yang yang menunjukkan seberapa parah biaya yang dikeluarkan untuk melakukan penanganan kegagalan komponen mesin shaving tersebut. Berdasarkan perancangan FTA diperoleh empat jenis komponen penting yang mengalami kegagalan yaitu pisau shaving, gerinda, v-belt dan roll karet. Selanjutnya hasil analisis FTA diperoleh penanganan risiko berupa rekomendasi perbaikan yaitu: pemilihan kualitas sparepart komponen dari berbagai supplier, melakukan perhitungan kuantitatif penjadwalan pemeliharaan preventif komponen mesin, menerapkan penjadwalan kerja (shiftwork) operator,dan meningkatkan pengawasan SOP (Standart Operational Procedure) secara disiplin. Sedangkan hasil analisis LDA diperoleh nilai operational value at risk (opvar) masing-masing komponen pada tingkat kepercayaan 90% yaitu komponen pisau shaving sebesar Rp 24.000.000, roll karet sebesar Rp 10.000.000, gerinda sebesar Rp 4.250.000, dan v-belt sebesar Rp 800.000. Nilai opvar ini berguna sebagai estimasi biaya yang harus dikeluarkan perusahaan jika terjadi risiko kegagalan komponen mesin shaving di masa mendatang.
Steffen Bernet - One of the best experts on this subject based on the ideXlab platform.
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modulation Losses and semiconductor requirements of modular multilevel converters
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Steffen Rohner, Steffen Bernet, Marc Hiller, Rainer SommerAbstract:This paper describes the operation of modular multilevel converter, an emerging and highly attractive topology for medium- and high-voltage applications. A new pulsewidth-modulation (PWM) scheme for an arbitrary number of voltage levels is introduced and evaluated. On the basis of this PWM scheme, the semiconductor Losses are calculated, and the Loss Distribution is illustrated.
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feedforward Loss control of three level active npc converters
IEEE Transactions on Industry Applications, 2007Co-Authors: T Bruckner, Steffen Bernet, Peter SteimerAbstract:The three-level neutral-point-clamped voltage-source converter (NPC VSC) is widely used in high-power medium-voltage (MV) applications. To overcome its major drawback - the unequal Loss Distribution among the semiconductors - the use of active NPC (ANPC) switches was previously proposed. In this paper, a simple feedforward Loss-control scheme for the ANPC converter is presented. The principle of operation of the ANPC VSC is experimentally verified for the first time. Electrical measurements on a low-voltage test bench prove the proper function of the ANPC converter. Infrared junction temperature measurements confirm the improved Loss Distribution using the new Loss-control scheme. Finally, the authors demonstrate the superior performance of the Loss-controlled ANPC converter in various MV applications.
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Comparison of 2.3-kV Medium-Voltage Multilevel Converters for Industrial Medium-Voltage Drives
IEEE Transactions on Industrial Electronics, 2007Co-Authors: Dietmar Krug, Seyed Saeed Fazel, Kamran Jalili, Steffen Bernet, Mariusz MalinowskiAbstract:This paper compares the expense of power semiconductors and passive components of a (2.3 kV, 2.4 MVA) two-level, three-level neutral-point-clamped, three-level flying-capacitor, four-level flying-capacitor, and five-level series-connected H-bridge voltage source converter on the basis of the state-of-the-art 6.5-, 3.3-, 2.5-, and 1.7-kV insulated gate bipolar transistors for industrial medium-voltage drives. The power semiconductor Losses, the Loss Distribution, the installed switch power, the design of flying capacitors, and the components of an sine filter for retrofit applications are considered.
Hiroshi Takahashi - One of the best experts on this subject based on the ideXlab platform.
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individual pon monitoring using maintenance band pulsed pump probe brillouin analysis
International Conference on Photonics in Switching, 2013Co-Authors: Hiroshi Takahashi, Chihiro Kito, Kunihiro Toge, Fumihiko ItoAbstract:We demonstrate individual PON monitoring using maintenance band pulsed pump-probe Brillouin analysis that can measure the individual Loss Distribution of each tributary in PONs from a central office.
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individual Loss Distribution measurement in 32 branched pon using pulsed pump probe brillouin analysis
Optics Express, 2013Co-Authors: Hiroshi Takahashi, Fumihiko Ito, Chihiro Kito, Kunihiro TogeAbstract:We describe Loss Distribution measurement in a passive optical network (PON) using pulsed pump-probe Brillouin analysis. A preliminary experiment is demonstrated using a 32-branched PON constructed in the laboratory. We analyze the signal to noise ratio of this measurement and show that the method can realize a 25 dB dynamic range in 90 seconds (10000 times averaging), with an event location resolution of 10 m, and a fiber length identification resolution of 2 m.
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individual Loss Distribution measurement in 4 branched pon using pulsed pump probe brillouin gain analysis
Optical Fiber Communication Conference, 2012Co-Authors: Hiroshi Takahashi, Xinyu Fan, Fumihiko ItoAbstract:We present a novel fault location technique for PONs that employs Brillouin gain analysis. We describe the measurement of 4-branched optical fibers in a PON with a spatial resolution of 10 m.
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individual fault location in pon using pulsed pump probe brillouin analysis
Electronics Letters, 2011Co-Authors: Hiroshi Takahashi, Xinyu Fan, Yusuke Koshikiya, Fumihiko ItoAbstract:A novel fault location technique for passive optical networks (PONs) that employs Brillouin gain analysis is presented. This method can measure the optical Loss Distribution of individual branched optical fibres without the need to add any optical components to PONs. A preliminary measurement of two-branched optical fibres in a PON is described.
Fumihiko Ito - One of the best experts on this subject based on the ideXlab platform.
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individual pon monitoring using maintenance band pulsed pump probe brillouin analysis
International Conference on Photonics in Switching, 2013Co-Authors: Hiroshi Takahashi, Chihiro Kito, Kunihiro Toge, Fumihiko ItoAbstract:We demonstrate individual PON monitoring using maintenance band pulsed pump-probe Brillouin analysis that can measure the individual Loss Distribution of each tributary in PONs from a central office.
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individual Loss Distribution measurement in 32 branched pon using pulsed pump probe brillouin analysis
Optics Express, 2013Co-Authors: Hiroshi Takahashi, Fumihiko Ito, Chihiro Kito, Kunihiro TogeAbstract:We describe Loss Distribution measurement in a passive optical network (PON) using pulsed pump-probe Brillouin analysis. A preliminary experiment is demonstrated using a 32-branched PON constructed in the laboratory. We analyze the signal to noise ratio of this measurement and show that the method can realize a 25 dB dynamic range in 90 seconds (10000 times averaging), with an event location resolution of 10 m, and a fiber length identification resolution of 2 m.
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individual Loss Distribution measurement in 4 branched pon using pulsed pump probe brillouin gain analysis
Optical Fiber Communication Conference, 2012Co-Authors: Hiroshi Takahashi, Xinyu Fan, Fumihiko ItoAbstract:We present a novel fault location technique for PONs that employs Brillouin gain analysis. We describe the measurement of 4-branched optical fibers in a PON with a spatial resolution of 10 m.
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individual fault location in pon using pulsed pump probe brillouin analysis
Electronics Letters, 2011Co-Authors: Hiroshi Takahashi, Xinyu Fan, Yusuke Koshikiya, Fumihiko ItoAbstract:A novel fault location technique for passive optical networks (PONs) that employs Brillouin gain analysis is presented. This method can measure the optical Loss Distribution of individual branched optical fibres without the need to add any optical components to PONs. A preliminary measurement of two-branched optical fibres in a PON is described.
Kunihiro Toge - One of the best experts on this subject based on the ideXlab platform.
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individual pon monitoring using maintenance band pulsed pump probe brillouin analysis
International Conference on Photonics in Switching, 2013Co-Authors: Hiroshi Takahashi, Chihiro Kito, Kunihiro Toge, Fumihiko ItoAbstract:We demonstrate individual PON monitoring using maintenance band pulsed pump-probe Brillouin analysis that can measure the individual Loss Distribution of each tributary in PONs from a central office.
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individual Loss Distribution measurement in 32 branched pon using pulsed pump probe brillouin analysis
Optics Express, 2013Co-Authors: Hiroshi Takahashi, Fumihiko Ito, Chihiro Kito, Kunihiro TogeAbstract:We describe Loss Distribution measurement in a passive optical network (PON) using pulsed pump-probe Brillouin analysis. A preliminary experiment is demonstrated using a 32-branched PON constructed in the laboratory. We analyze the signal to noise ratio of this measurement and show that the method can realize a 25 dB dynamic range in 90 seconds (10000 times averaging), with an event location resolution of 10 m, and a fiber length identification resolution of 2 m.
