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All Journal Journal of Information System and Technology (JOINT) Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Impression : Jurnal Teknologi dan Informasi Emitor: Jurnal Teknik Elektro
Sandi, Wulan Marlia
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Arts Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Social Sciences

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Analisis Kerusakan Bearing Turbine Side di Turbocharger Type VTR-160 pada Auxiliary Engine Ashari, Muhammad Sadeli; Robbi, Shofa Dai; Sandi, Wulan Marlia; Kristiyono, Antonius Edy; Prawoto, Agus
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 1 (2025): Maret 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i1.787

Abstract

Turbocharger adalah alat bantu yang digerakkan oleh gas buang auxiliary diesel engine dan berfungsi memompa udara untuk proses pembilasan dan pembakaran di dalam silinder. Kinerja mesin ini sangat bergantung pada turbocharger. Kerusakan pada turbocharger, khususnya pada bearing, dapat menurunkan performa mesin secara signifikan. Penelitian ini bertujuan untuk mengidentifikasi penyebab kerusakan bearing turbocharger, dampaknya terhadap auxiliary engine, serta upaya perbaikannya di MV Armada Sejati. Metode yang digunakan adalah deskriptif kualitatif dengan pendekatan fishbone. Data dikumpulkan melalui observasi, wawancara, dan dokumentasi. Hasil penelitian menunjukkan bahwa kerusakan disebabkan oleh tercampurnya oli pelumas dengan gas buang, keausan sealing bush, dan tersumbatnya lubang oil pump. Dampaknya antara lain berkurangnya suplai udara, kerusakan ring piston, dan pembakaran yang tidak sempurna sehingga daya mesin menurun. Upaya pencegahan dilakukan dengan perawatan rutin turbocharger, penggantian komponen lama, serta pergantian oli pelumas secara berkala. A turbocharger is an auxiliary exhaust device that is driven by the auxiliary exhaust of a diesel engine and functions to pump air for the rinsing and combustion process inside the cylinder. The performance of this engine is highly dependent on the turbocharger. Damage to the turbocharger, especially to the bearings, can significantly degrade engine performance. This study aims to identify the cause of damage to the turbocharger bearing, its impact on the auxiliary engine, and its repair efforts in MV Armada Sejati. The method used is qualitative descriptive with a fishbone approach. Data was collected through observation, interviews, and documentation. The results of the study showed that the damage was caused by the mixing of lubricating oil with exhaust gases, the wear of the sealing bush, and the clogging of the oil pump holes. The impact includes reduced air supply, damage to the piston rings, and imperfect combustion so that engine power decreases. Prevention efforts are carried out with regular maintenance of turbochargers, replacement of old components, and periodic changes of lubricating oil  
Perancangan Sistem Kontrol Propulsi Hibrida Kapal Trimaran Berbasis Fuzzy Logic Aldoko, Fajar Surya Muhammad; Kurniawan, Edi; Amrullah, Romanda Annas; Nurdiansari, Henna; Sandi, Wulan Marlia
Journal of Information System and Technology (JOINT) Vol. 6 No. 3 (2025): Journal of Information System and Technology (JOINT)
Publisher : Program Sarjana Sistem Informasi, Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/joint.v6i3.11303

Abstract

This study presents the design and implementation of a hybrid propulsion control system for a trimaran vessel using fuzzy logic. The system integrates a Brushless DC (BLDC) motor and an internal combustion engine, controlled by STM32 and ESP32 microcontrollers, with sensors for speed and current monitoring. The fuzzy logic algorithm was developed with two input variables—speed error and delta error—and one output variable for motor control. Experimental testing was conducted on a trimaran prototype in river conditions to evaluate system performance. The results show that, without fuzzy logic, the vessel’s speed fluctuated significantly, deviating from the reference set point. In contrast, with fuzzy logic control, the vessel maintained a more stable speed, achieving an average error of less than 5%. This demonstrates that fuzzy logic can effectively address the non-linear characteristics of hybrid propulsion systems, providing adaptive control that enhances speed stability and energy efficiency.
Design of a Ship Speed Control System Using Hybrid Propulsion Based on Fuzzy Logic Aldoko, Fajar Surya Muhammad; Kurniawan, Edi; Amrullah, Romanda Annas; Nurdiansari, Henna; Sandi, Wulan Marlia
Emitor: Jurnal Teknik Elektro Vol 25, No 3: November 2025
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v25i3.12727

Abstract

The maritime transportation sector, especially in archipelagic countries like Indonesia, faces significant challenges in optimising ship speed and fuel efficiency, particularly when using hybrid propulsion systems. This study aims to design a ship speed control system based on fuzzy logic integrated with a hybrid propulsion system (BLDC motor and diesel engine) for a trimaran vessel. The research employed both static and dynamic testing on the system, measuring parameters such as motor RPM, current consumption, voltage, and fuel efficiency across different speed modes (from 4 km/h to 11 km/h). The results showed that the fuzzy logic-based control system notably improved speed stability and fuel efficiency, especially at lower speeds, compared to conventional systems. Additionally, the system effectively adapted to environmental conditions such as waves and currents, optimising power distribution between the BLDC motor and diesel engine. The conclusion emphasises that this fuzzy logic-based control system offers a promising solution to enhance operational efficiency in hybrid propulsion systems for maritime vessels, ensuring reduced fuel consumption and improved environmental sustainability.
ANALISIS MENURUNNYA TEKANAN LUBRICATING OIL PADA DIESEL GENERATOR DI KM. DHARMA KARTIKA VII Dolly Sirait, Maruli; Nugroho, Azis; Sandi, Wulan Marlia; Zainuddin, Mochammad; Kristiyono, Antonius Edy
SIBATIK JOURNAL: Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Vol. 5 No. 2 (2026)
Publisher : Penerbit Lafadz Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/sibatik.v5i2.4397

Abstract

Diesel generators are vital components in a ship's machinery system that converts mechanical energy into electrical energy. Diesel generators serve as the primary source of electrical power for various onboard needs, such as ship operations, navigation, communications, comfort, and other equipment. The lubrication system (lubricating oil) is a special liquid that plays a crucial role in lubricating engine components, ensuring smooth engine operation, and maintaining the performance and reliability of diesel generator engines. A decrease in lubricating oil pressure can cause overheating, increased friction between components, and even overall engine damage. This study aims to analyze the causes of the decrease in lubricating oil pressure in the diesel generator on the KM. Dharma Kartika VII ship and its handling efforts. The method used is a descriptive qualitative approach with data collection techniques through direct observation, interviews with engineers, documentation, and literature studies. The results of this study are expected to serve as a practical reference for ship crews and maritime cadets in handling disturbances in the diesel generator lubrication system appropriately.
Co-Authors Abda Abda Aldoko, Fajar Surya Muhammad Ashari, Muhammad Sadeli Dolly Sirait, Maruli Eka Nurmala Sari Agustina, Eka Nurmala Sari Kristiyono, Antonius Edy Nugroho, Azis Nurdiansari, Henna Prawoto, Agus Robbi, Shofa Dai Romanda Annas Amrullah Tanti Diyah Rahmawati, Tanti Diyah Vigih Hery Kristanto ZAINUDDIN, MOCHAMMAD