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All Journal Jurnal Teknik Mesin Rotasi Rekayasa Mesin Semesta Teknika Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Teknik Informatika (JUTIF) Jurnal Media Teknologi METAL : Jurnal Sistem Mekanik dan Termal Jurnal Ilmiah MEA (Manajemen, Ekonomi, dan Akuntansi) TEKNOSIA Teaching English as a Foreign Language Journal ADJES (Ahmad Dahlan Journal of English Studies) Asian Journal of Social and Humanities Jurnal Polimesin Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Dharmakayana: Journal of scientists, engineers, educators and scientific activists related to society development SEMINAR TEKNOLOGI MAJALENGKA (STIMA)
Dedi Suryadi
Universitas Bengkulu
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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ANALISIS VIBRASI PADA POMPA Panjaitan, Felix Budianto; Suryadi, Dedi; Zuliantoni
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 2 (2023): Oktober 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v7i2.34059

Abstract

Vibration analysis is an effective machine maintenance method by analyzing signal characteristics and vibrations so that the condition and condition of the equipment can be identified. PT. The Pertamina International Refinery - Balikpapan is one of the business units of the Pertamina Refinery Directorate whose products are distributed to the eastern part of Indonesia which is 2/3 of the Republic of Indonesia and some products are distributed to the western part of Indonesia and exported. The benefit of the vibration method is to find out damage to the pump early and to avoid more severe damage to the pump. The research method is carried out by periodically monitoring an equipment (pump) with vibration analysis to see the condition of the machine under normal conditions until damage occurs. High vibrations occur at the DE point which is lower than the NDE point. Based on measurements, high vibration occurred at the NDE pump point on January 17, 2023 in the vertical direction – speed of 27,041 mm/s, horizontal direction – speed of 28.21 mm/s, horizontal direction – casing 28,539 mm/s, and axial direction – speed of 26.89mm/s. After analyzing the spectrum, it is known that the cause of high vibration in the pump is caused by bearings that are not working properly. And also because of the Random High Frequency on the spectrum, where the frequency occurs due to damage to the bearings. The overall vibration value in the DE and NDE positions after repair is within the permissible limits based on ISO 10186.
ANALISA ALIGNMENT SHAFT TURBIN GAS Ramadani, Dwi; Suryadi, Dedi; Bismantolo, Putra
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 1 (2024): April 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i1.36548

Abstract

In the gas turbine system there is a section that functions as a place for combustion between a mixture of air and gas called the combustion section. The components of the alignment of the shaft need to be maintained regularly so that the resulting combustion is good. In the process of the turbine producing electrical energy there are many obstacles that occur which result in a reduction in the productivity of the turbine work, one of the causes is misalignment of the shaft. Misalignment on the shaft can be overcome by carrying out an alignment process which aims to make the shaft return to its initial position so that it is parallel to the other shaft. The alignment process is carried out to get the axial and radial values on the shaft which is then carried out by the adjusting process. The adjusting process is carried out so that the position of the shaft that is out of tolerance returns to the tolerance position and the work of the turbine can return to normal.
“EFFICIENCY ANALYSIS OF 3 DIFFERENT FUEL TOWARDS GASOLINE FUEL MOTORS ON EME 35 ENGINES IN LAPAN SURVELLANCE UAV-02 (LSU-02)” Ramadhan, M. Fajar; Bismantolo, Putra; Suryadi, Dedi; Utama, Agus Bayu
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 2 (2024): Oktober 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i2.38341

Abstract

This study aims to analyze the efficiency of three different types of fuel on the EME 35 engine on the LSU 02 aircraft. The fuel used is Pertalite, Pertamax, and Pertamax turbo. The method used in this study was an experiment using the LSU 02 aircraft as the research object. The data is taken from measurements of fuel consumption and engine performance on each type of fuel. The analysis is carried out by comparing the efficiency and performance of the engine on each type of fuel used. The results showed that the efficiency and performance of the engine on Pertamax fuel was better than that of Pertamax turbo and Pertalite. Fuel consumption on Pertamax is more efficient than Pertalite and Pertamax turbo, so that Pertamax is more efficient in fuel use. In addition, engines on Pertamax fuel have better performance with greater power and are more stable compared to Pertalite and Pertamax turbo. Therefore, it is recommended to use Pertamax fuel in the EME 35 engine on the LSU 02 aircraft to achieve better efficiency and performance.
Rancang bangun dan analisa trial and eror prosthethic servo power handa Yanalseta, Rifaldi; Suryadi, Dedi; Saputra, Roni Permana
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39847

Abstract

Prosthetic hands are designed to help people with disabilities work. This research aims to make a prosthetic hand using a 3D printing machine with a focus on using Solidworks software for model design, Ultimaker Cura software for slicing printing in the form of G-Code, and filler material in the form of PLA filament. The main components used involve a servo motor (MG996), Arduino Uno, and breadboard. This research focuses on making designs using solidworks, using servo motors (MG996), and using PLA filament material. The data collection process is divided into three stages: design creation, G-code creation, and printing, as well as the data collection process which involves trial and error on the prosthetic hand. The results of this research show that although in general all the fingers of the prosthetic hand can move, there are some fingers that experience problems following program commands. Factors such as design, manufacturing defects, hinges, and connecting straps between the servo motor and the finger affect the movement of the prosthetic hand's fingers. Although some fingers can move well, there are also those who experience difficulty in movement.
DESAIN DAN ANALISIS CASE LINFLOW WATER METER DENGAN MENGGUNAKAN METODE CAD Nuryadi, Rio Arian Syaputra; Suryadi, Dedi; Nizam, Ahmad
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.40091

Abstract

Linflow water meter is a smart technology-based water consumption meter designed to improve accuracy and efficiency in water resource management, both in the household, commercial, and industrial sectors. To protect the sensitive components inside and ensure the durability of the tool in a wide range of environmental conditions, a reliable case design is required. This study aims to design and analyze the linflow water meter casing by considering the aspects of pressure resistance, protection against moisture and temperature, as well as conducting static and thermal analysis to evaluate the structural integrity and performance of the water meter, ensuring that it meets industry standards for efficiency and durability. The methodology used includes the selection of materials that are resistant to stress and corrosion, the design of ergonomic casing structures, and durability simulations using the finite element analysis (FEA) method. The results of the analysis show that the high-quality polymer material with the addition of an anti-corrosion coating provides optimal protection for the operational environment. In addition, the modular design of the case makes it easy to install and maintain without affecting the integrity of the device. These findings are expected to improve the design process and operational reliability of water meters, thereby supporting effective drainage management and infrastructure protection.
Turn-Taking Strategies in Talk Show Interviews: A Qualitative Study of K-Pop Idol BTS on The Tonight Show Purwanti, Eko; Cahyani, Ananda Pramesti Regita; Meisa, Wistri; Suryadi, Dedi; Sari, Mariska Intan; Pasandalan, Sittie Noffaisah
Ahmad Dahlan Journal of English Studies Vol. 12 No. 1 (2025)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/adjes.v12i1.1330

Abstract

Turn-taking plays a vital role in managing and structuring conversations, making it especially important in both everyday interactions and educational environments. While much research has explored turn-taking in classroom or casual settings, limited attention has been given to how it operates in bilingual or multilingual media interviews. This study seeks to fill that gap by examining the turn-taking strategies used during interviews between Jimmy Fallon and K-Pop Idol BTS (Bangtan Sonyeondan), a globally recognized Korean boy band, on The Tonight Show Starring Jimmy Fallon. Employing a qualitative method, the study analyzed three interview videos through transcription and manual coding, guided by Stenstrom’s framework of turn-taking strategies. The analysis identified three main strategies: Taking the Turn (TTS), Holding the Turn (HTS), and Yielding the Turn (YTS). Among these, Taking the Turn (TTS) emerged as the most dominant, appearing in 47% of instances—emphasizing its key role in shaping the dynamic flow of K-Pop Idol interviews. These findings offer valuable insights for language learners and educators by demonstrating authentic conversational strategies in multilingual contexts. Furthermore, these findings may also serve as practical references for media professionals and interviewers aiming to manage turn-taking more effectively during live interactions.  
ANALISA RESPON GETARAN PADA TURBIN FRANCIS DENGAN MENGGUNAKAN SINYAL SUARA M.Hapis Apmarwansahrowi; Dedi Suryadi; Helmizar
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 1 (2022): April 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v6i1.25450

Abstract

Damage is very common in the PLTA Hydroelectric francis turbine, usually appearing on parts, clutches, gears, bearings, or other drive components. Proper fault diagnosis can help to reduce or even prevent breakdowns. To identify damage to the turbine can use sound signal analysis. This method analyzes using sound signals. By analogizing vibrations as sound waves produced by mechanical vibrations, it is hoped that the sound signal can be used as a parameter to determine the condition of the turbine. In this study, to get the best signal, a microphone is used as a sensor to capture sound signals which are placed on the guide bearing of the hydropower test turbine. The sound signal in the time domain is then transferred to a signal in the frequency domain using Fast Fourier Transform (FFT). The results of the test showed that there were 2 active frequencies, 1x rpm and 2x rpm at a turbine rotation of 500 rpm for 6 days of testing. These characteristics indicate the identification of the problem of the bent shaft on the turbine.
Optimal Phase Selection Of Single-Phase Appliances In Buildings Using String-Coded Genetic Algorithm Daratha, Novalio; Vatresia, Arie; Santosa, Hendy; Agustian, Indra; Suryadi, Dedi; Gupta, Neeraj
Jurnal Teknik Informatika (Jutif) Vol. 6 No. 3 (2025): JUTIF Volume 6, Number 3, Juni 2025
Publisher : Informatika, Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jutif.2025.6.3.4603

Abstract

Phase imbalance in buildings, primarily caused by single-phase loads and generation, leads to increased neutral current, voltage imbalance, reduced energy efficiency, and potential equipment damage. To address these challenges, an optimal phase selection method is proposed for single-phase loads and generation. This method integrates integer programming with a string-coded genetic algorithm (GA). The GA employs string encoding to represent phase connections. Initially, a Mixed Integer Programming (MIP) solver identifies an initial solution, which is subsequently transformed into a string to initialize the GA’s genes. Subsequently, the GA executes standard operations such as mutation, crossover, evaluation, and selection. Case studies demonstrate the efficacy of this method in achieving substantial load balancing. Notably, the identification of multiple solutions with identical objective function values renders this approach suitable for smart buildings equipped with energy management systems that participate in ancillary services between low-voltage and medium-voltage networks. This research pertains to the domains of computer science, power engineering, and energy informatics.
MEASUREMENT OF VIBRATION LEVELS AND GEOMETRIC QUALITY OF RECONDITIONED LATHE PRODUCTS WITH VARIATIONS IN BASIC MACHINING ELEMENTS Hendra, Hendra; Dani, Admon; Suryadi, Dedi; Hernadewita, Hernadewita
Asian Journal of Social and Humanities Vol. 2 No. 1 (2023): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v2i1.160

Abstract

Machining parameters are something that must be considered, where machining parameters are related to vibrations (chatters) that occur during the cutting process. Vibration (chatter) can affect the quality of the geometry of the resulting product. To find out this, it is necessary to test the influence of machining parameters on the vibration level and quality of product geometry. Measurement of vibration level values and product geometry quality is carried out at variations of 60 rpm, 215 rpm, 330 rpm and 1140 rpm, with variations in cutting depth of 0.5 mm, 1 mm, 2 mm and 3 mm. The results of the cutting process with the influence of machining parameters (spindle rotation and cutting depth) on vibration, the most optimal value with a low vibration level is obtained, namely in the cutting process with spindle rotation parameters (n) 1140 rpm, and cutting depth (a) 1 mm produces a vibration value of 2.1 mm / s. However, for the most optimal cutting process, the highest vibration level value is produced, that is, in the cutting process with spindle rotation parameters (n) 215 rpm and cutting depth (a) 3 mm resulting in a vibration value of 3.4 mm / s. From the results of measuring the vibration level, it is obtained that the vibration level value has exceeded the permissible tolerance limit. However, for the influence of machining parameters on the quality of product geometry, results are obtained with the quality of product geometry that is still within the permissible tolerance limits, namely at spindle rotation (n) 1140 rpm. For the results of measuring the quality of product geometry at spindle rotation (n) 60 rpm, 215 rpm and 330 rpm, the quality results of product geometry obtained have exceeded the permissible tolerance limit.
Analysis of Temperature Distribution on the Coffee Roaster Drum for a Capacity of 2 kg Using Computational Fluid Dynamics (CFD) Suryadi, Dedi; Leonanda, Benny Dwika; Mustagfirin, Alfin; Suandi, Agus
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4032

Abstract

Coffee, one of Indonesia's largest commodities, is often processed using traditional methods and tools that rely heavily on manual labor and can be labor-intensive. To make the coffee roasting process more efficient and reduce the need for human effort, a coffee roasting machine can be used. This study aimed to analyze coffee roasting drums using computational fluid dynamics (CFD) to determine the optimal drum thickness and rotation speed in a coffee roasting machine. The study considered three different thicknesses (1mm, 2mm, and 3mm) and three different rotation speeds (60rpm, 65rpm, and 70rpm). The coffee roasting drum was modeled using CFD. The study's results showed that a drum thickness of 2mm and a rotation speed of 70rpm achieved the best heat distribution during roasting, reaching the desired temperature in 900 seconds. This information could be used to design a more efficient coffee roasting machine or improve the performance of existing machines.
Co-Authors A Sofwan FA Abidin, Zenal Adhadi Kurniawan Afif Chaniago Bastiar Afrizal, Yuzuar Agus Nuramal Agus Nuramal Agus Suandi Agus Suandi Agus Suandi, Agus Agustian, Indra Ahmad Fauzan Ahmad Fauzan Suryono Ahmad Fauzan Suryono Aji Arya Dewangga Al Ayufhi, Syahlahudhin Alparisi, Ahmad Salman Arie Vatresia Arie Vatresia Astutiningsih, Rini Tri Bismantolo, Putra Bowo Anugrah Budiharjo, Rahmat Satrio Cahyani, Ananda Pramesti Regita Carnegie, Novrian Dani, Admon Daratha, Novalio Dharmayanti , Margaretha Fadilah, M. Hafidz Febliansa, Muhammad Rahman Febriyanto, M Reza Firdaus, Hendra Firtrianty Wardhani Fitranita, Vika Fitri, Tessa Zulenia Fitrilina, Fitrilina Gupta, Neeraj Hade Syamitra Helmizar Hendra Hendra Hendri Hestiawan Hendy Santosa Hernadewita, Hernadewita Indra Agustian Indra Agustian Indri Nur Alfi Qodariyah Leonanda, Benny Dwika Lesmana, Pandu M. Rasyid Ridlo M.Hapis Apmarwansahrowi Maimuzar Maimuzar Meilianda, Rifki Meisa, Wistri Muhammad Imam Zuhdi Munadi Munadi Mustagfirin, Alfin Nizam, Ahmad Novalio Daratha Novalio Daratha Novalio Daratha Nurul Iman Supardi Nurul Iman Suparrdi Nuryadi, Rio Arian Syaputra Panjaitan, Felix Budianto Pasandalan, Sittie Noffaisah Pratama, M. Dicky Qodariyah, Indri Nur Alfi Ramadani, Dwi Ramadhan, M. Fajar Roni Permana Saputra Santosa, Hendy Sari, Mariska Intan Satryo Ramadhani Setyawan, Harry Prayoga Situmorang, Egi Seven Sri Astuti Syukran Syukran Utama, Agus Bayu Wahyu Rahmat Hidayat Yanalseta, Rifaldi Yanuardi, Endi Yovan Witanto Yuniati Yuniati Yuniati Yuniati Zuhdi, Muhammad Imam Zuliantoni, Zuliantoni