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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Transmisi: Jurnal Ilmiah Teknik Elektro AUSTENIT YOUNGSTER PHYSICS JOURNAL Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal Rekayasa Mesin JURNAL INTEGRASI Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Agrotek UMMat Jurnal Inovator Andalasian International Journal of Applied Science, Engineering, and Technology International Journal of Research in Vocational Studies (IJRVOCAS) Automotive Experiences Eksergi: Jurnal Teknik Energi Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Inclusive Society and Sustainability Studies (ISSUES) Jurnal Pengabdian Masyarakat Bangsa Journal of Mechanical Engineering and Applied Technology Jurnal Polimesin International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Journal of Mechanical Engineering and Fabrication

Yusuf Dewantoro Herlambang

Politeknik Negeri Semarang

Author-ID : 2770526

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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MODEL TURBIN ANGIN AIRFOIL NACA 4418 TERHADAP VARIASI BUKAAN SUDUT SUDU PADA KECEPATAN ANGIN BERBEDA Yusuf Dewantoro Herlambang; Budhi Prasetiyo; Supriyo Supriyo; Wahyono Wahyono; Teguh Harijono Mulud
JURNAL INTEGRASI Vol 11 No 2 (2019): Jurnal Integrasi - Oktober 2019
Publisher : Politeknik Negeri Batam

Penelitian ini mengkaji Turbin Angin Sumbu Vertikal (Vertical Axis Wind Turbine) Aerofoil NACA 4418 yang memiliki diameter rotor 560 mm, panjang sudu 800 mm, jumlah sudu 3 buah, serta bahan sudu terbuat dari fiberglass. Selanjutnya menganalis karakteristik turbin angin rotor vertikal 3-sudu tersebut pada kecepatan angin berbeda 5 m/s, 6 m/s, 7 m/s, 8 m/s, dan 9 m/s dengan 5 buah model turbin angin dengan bukaan sudut sudu (blade pitch angle) bervariasi yaitu 00, 100, 200, 300, dan 400. Hasil pengujian turbin angin diperoleh rasio kecepatan sudu (Tip Speed Ratio) yang optimum sebesar 1,7 pada sudut sudu 100 dengan putaran turbin 321 rpm dan kecepatan angin 5,42 m/s. Daya mekanik optimum yang diperoleh adalah 19,4 W pada bukaan sudut sudu sebesar 200 dengan putaran turbin 381 serta kecepatan angin 6,4 m/s. Turbin menghasilkan koesifien daya (Coefficient of Power) optimum yang dihasilkan sebesar 0,202 dengan bukaan sudut sudu sebesar 100 dan putaran turbin 198 rpm, dan daya mekanik yang dihasilkan 8,5 Watt pada variabel pengujian kecepatan sebesar 5,42 m/s.

Analisis Pengaruh Talent Management dan Organizational Culture terhadap Organizational Performance dengan Organization Commitment Sebagai Variabel Mediasi Putri, Mega Purnama; Anwar, Muhammad Khaerul; Wahyuni, Puri; Dewantoro, Yusuf; Gunawan Putra, Andreas Wahyu
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : CV. Ridwan Publisher

Tujuan dari studi empiris ini adalah untuk memeriksa dan menganalisis dampak manajemen bakat dan budaya organisasi pada kinerja yang dipandu oleh komitmen organisasi. Penelitian ini menggunakan pendekatan langsung dengan mendistribusikan questionnares dan metode sampling dengan purposive sampling yang melibatkan 152 karyawan The Four Season Hotel Jakarta. Alat analisis dalam penelitian ini adalah alat Structural Equation Modeling (SEM) dengan Partial Least Square. Hasil penelitian ini adalah dampak positif dan signifikan dari manajemen bakat, budaya organisasi, commitmen pada performace. Hal ini juga shoen bahwa komitmen organisasi memainkan peran sebagai jembatan pada kedua manajemen bakat dan budaya organisasi. Hasil penelitian ini menyimpulkan bahwa manajer SDM harus fokus pada penghargaan, insentif, dan penghargaan yang diberikan secara teratur kepada karyawan, untuk meningkatkan motivasi karyawan dan berkontribusi pada pertumbuhan perusahaan.

Automation of Load Electricity Operating System Using PLC (Programmable Logic Controller) Hairul; Fatahul Arifin; Romi Wilza; Zakaria Zakaria; Kurniawan; Yusuf Dewantoro Herlambang
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 3 No. 1 (2023): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v3i1.200

Jakabaring PLTS on-grid with a capacity of 2 MW operates from 6:00 am to 5:00 pm. At 5:00 pm the PLTS connection to the load will be disconnected and replaced with PLN. If the PLN is off due to damage or during maintenance, a generator that is operated manually will be used. Problems in the process of combining energy sources from Solar Panels to PLN require a power target of up to 10 Kva where if the power is fulfilled then the energy source from Photovoltaic (PV) will be connected to PLN and vice versa. Errors and speed in operation can be minimized by means of automation of the system operating the power supply to the load by using a PLC (Programmable Logic Controller). Optimization as a step to optimize the electricity supply in the PLTS area makes it the first source of power generation that is connected to the load, the second order is PLN if the PLTS has no power output or there is a problem and the third order is generators if PLN and PLTS have no power output. For this reason, a tool is needed that functions to move the power source alternately using a PLC (Programmable Logic Controller) as an ATS (Automatic Transfer Switch) process controller, where the tool will work automatically changing the power source if there is a disturbance that causes it to be unable to supply electricity to the user's load and also as a priority regulator of solar power sources as the main source of electricity to the load. When transferring loads from one source to another with 3 different power sources, it is faster and more effective to use an ATS (Automatic Transfer Switch) with a PLC controller compared to Manual or COS (Change Over Switch).

Unjuk kerja Turbin Savonius Menggunakan Generator Sinkron Magnet Permanen pada Variasi Pembebanan dan Kecepatan Angin yang Berbeda Herlambang, Yusuf Dewantoro; Supriyo, Supriyo; Prasetiyo, Budhi; Mulud, Teguh Harijono
Jurnal Rekayasa Mesin Vol 16, No 2 (2021): Volume 16, Nomor 2, Agustus 2021
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v16i2.2860

Energi angin merupakan sumber energi terbarukan yang sangat melimpah di Indonesia, karena merupakan negara tropis yang memiliki potensi angin yang cukup besar. Penelitian ini difokuskan pada turbin angin Savonius poros vertikal karena mampu menerima aliran angin dari segala arah. Tujuan penelitian ini adalah membuat turbin Savonius putaran rendah menggunakan generator sinkron permanen magnet untuk meningkatkan kinerja pada kondisi kecepatan angin yang berbeda. Metode penelitian ini adalah merancang, membuat, menguji alat, dan menganalisis kinerja turbin Savonius pada kecepatan angin 5 m/s, 7 m/s, 9 m/s, dan 11 m/s. Turbin Savonius ini memiliki dimensi rangka sudu tinggi 700 mm dan dimensi sudu turbin tinggi 800 mm, lebar diameter sudu 680 mm. Mekanisme transmisi menggunakan v-belt dan pulley berdiameter 60 mm dan 120 mm yang dihubungkan dengan generator sinkron magnet permanen, Sedangkan tinggi rangka penyangga 750 mm dilengkapi denga roda jalan. Hasil penelitian menunjukkan bahwa pada pembebanan 5 W menghasilka putaran generator rata-rata 520 rpm dan daya generator sebesar 5,29 W.

Analisis Kekuatan Pembebanan Frame Pada Meja Las Wahyu Triharto Prabowo; Fatahul Arifin; Yusuf Dewantoro Herlambang; Ramadoni; Willy Ravindo H Damanik
Jurnal INOVATOR Vol. 6 No. 1 (2023): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v6i1.4

Welding machine is a machine that facilitates human work in joining metals. There are two types that are usually used by humans, namely carbide welding machines and electric welding machines. Which both have their respective advantages as a metal connector. This article is lifted from the problem that occurs in the frame or frame on the welding table which experiences severe enough bending of the top frame (head support) which can damage the table frame and the unknown load (force) received by the welding table frame so that the frame is experiencing a bend. Then a design is carried out in the form of a design drawing that can be analyzed for the strength and stress that occurs in the frame which allows researchers to know the load value that is safe to use for the frame. This article aims to reveal the value of the stress that occurs in the frame and the safety value obtained from the design results of the weld table frame structure in the form of technical drawings and structural strength analysis. This article is limited to a loading of 400 newtons. This article examines the design, simulation and stress analysis of the weld table frame structure with a capacity of 400 newtons using the finite element method or also known as Finite Element Analysis (FEA). The material used is st37 iron. Finite element analysis was carried out using a numerical system using the Autodesk Inventor Professional 2020 software. The results of the simulations and also the analysis that has been carried out show that the welding table frame structure has a stress, deformation, mass, and safety factor of 20.0755 MPa, 0.0582948 mm, 40 kg

Studi analisis simulasi kekuatan beban pada alat bantu pembuatan lubang dengan sudut kemiringan 45 derajat Dr. Fatahul Arifin, S.T., Dipl.Eng.EPD., M.Eng.Sc; Dwi Arnoldi, S.T., M.T.; Ella Sundari, S.T., M.T.; Fenoria Putri, S.T., M.T.; Feby Agasa; Yudha Ramadhan; Gustaf Susetyo; Dr. Yusuf Dewantoro Herlambang, S.T., M.T.
Jurnal POLIMESIN Vol 18, No 2 (2020): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i2.1837

Jig and Fixture 45 degree bore is a tool which is used to make hole the degree 45 degrees. The goal of study is design and analyze the strength of the frame and assembly with variations in position of load and value from 100 kg to 500 kg. The results of the stress analysis feature with finite element Analysis (FEA) are von misses stress, displacement, and safety factor. The Frame uses a hollow carbon steel of 20 mm x 20 mm, a material of carbon steel. The frame length is 300 mm, the width is 300 mm, the height is 270 mm, dimension of the tool is 300 mm x 300mm x 270 mm. The simulation results are; the safety factor of frame maximum is 7.08 with a load of 100 kg, while minimum is 1.42 with load 500 kg. Whereas, the overall assembly safety factor maximum is 3.88 with loads 100 kg and minimum is 0.82 with load 500 kg. The unsafe location is on the upper of connection frame, while for the overall assembly is on the buffer of shaft component.

Design optimization of sleeve finger splint model using Finite Element Analysis Zakki Fuadi Emzain; Utsman Syah Amrullah; Am. Mufarrih; Nanang Qosim; Yusuf Dewantoro Herlambang
Jurnal POLIMESIN Vol 19, No 2 (2021): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i2.2272

One of the rehabilitation alternatives for fingers injuries is to use a finger splint. Some existing finger splint models still use excessive material, and the size is not appropriate. The purpose of this study was to propose a customized sleeve finger splint model with a conical shape along with the finger surface from the proximal phalanges to the distal phalanges. Design optimization using topology optimization was carried out to reduce mass and volume while maintaining the stress strength of the model. The stages of the method in this research were modeling design, preprocessing analysis, topology optimization, and postprocessing analysis. Topology optimization design was set with 70% mass in response constraint. The analysis results showed a significant reduction in the model mass of 42.18%, from 6.78 grams to 3.92 grams. Meanwhile, the maximum equivalent stress increased slightly by 3.42%, from 8.12 MPa to 8.4 MPa. Even though there was an increase in equivalent stress after topology optimization, the sleeve finger splint model was still categorized as safe, with a safety factor of 3.39.

Desain dan Analisis Elemen Hingga Model Wrist Hand Orthosis Berbasis Metode Pemodelan Reverse Engineering Zakki Fuadi Emzain; Nanang Qosim; AM. Mufarrih; Yusuf Dewantoro Herlambang; Fatahul Arifin
Jurnal Rekayasa Mesin Vol 18, No 1 (2023): Volume 18, Nomor 1, April 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i1.3936

Salah satu treatment untuk spasticity efek pasca stroke, fracture karena kecelakaan, injury karena cedera olahraga, dan musculoskeletal disorders karena pekerjaan kantoran pada pergelangan tangan selain dengan operasi yaitu dengan penggunaan wrist hand orthosis. Umumnya pembuatan medical device tersebut menggunakan metode konvensional yang mempunyai kekurangan. Hadirnya teknologi reverse engineering (RE) dapat diaplikasikan dalam bidang medis seperti pembuatan alat prosthetic atau orthosis. Pada penelitian ini bertujuan untuk mengembangkan desain wrist hand orthosis berbasis reverse engineering dan menganalisisnya menggunakan metode elemen hingga. Metode penelitian meliputi 3D scanning, CAD modelling, model analysis, dan post processing. Material model yang digunakan adalah ABS dengan variasi ketebalan 5 mm, 6 mm, dan 7 mm, serta besar nilai pembebanan mulai dari 5 N sampai 25 N. Hasil analisis equivalent stress menunjukkan model ketebalan 5 mm mampu menahan load 25 N dengan maximum equivalent stress sebesar 13.52 MPa yang masih tergolong aman dengan nilai safety factor 2.11 dengan area kritis di ujung punggung telapak tangan model antara ibu jari dan jari telunjuk. Hasil equivalent elastic strain dan deformation juga mempunyai tren grafik yang sama dengan nilai maximum pada model ketebalan 5 mm yaitu masing-masing sebesar 0.0057 mm dan 0.616 mm. Dari hasil analisis tersebut dapat disimpulkan bahwa model wrist hand orthosis berlubang voronoi yang memiliki bentuk seperti surface tangan manusia dengan ketebalan minimalis 5 mm mampu bekerja dengan baik memfiksasi tangan pasien untuk proses rehabilitasi.

Application of a PEM Fuel Cell Engine as a Small-Scale Power Generator for Small Cars with Different Fuel Concentrations Herlambang, Yusuf Dewantoro; Sulistiyo, Wahyu; Margana, Margana; Apriandi, Nanang; Marliyati, Marliyati; Setiyo, Muji; Shyu, Jin Cherng
Automotive Experiences Vol 6 No 2 (2023)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.9225

A fuel cell power generation system is a renewable energy system that works based on electrochemical processes and produces a direct electric current (DC). Specifically, a Proton Exchange Membrane (PEM) Fuel Cell can operate at low temperatures and produce an efficiency of around 40-60%. In this study, the performance test of the PEM Fuel Cell for power generation was carried out by supplying hydrogen gas using hydrogen from the electrolysis of the hydrogen generator with a variation of KOH catalyst solution with a concentration of 0.5 M; 1.0 M; 1.5 M; 2 M and using Ultra High Purity (UHP) hydrogen with various flow rates of 250 mL/min, 300 mL/min, 350 mL/min, 400 mL/min, 450 mL/min, and 500 mL/min. The test results showed that the output power of hydrogen produced by the electrolysis process was 10.8 W at a concentration of 1 M solutions at an input current of 20 A. The greater the concentration of the catalyst solution, the smaller the electrical power required for the electrolysis process. However, the hydrogen power supply produced by the hydrogen generator was not optimal, so it did not meet the needs of the PEM Fuel Cell. As a result, the PEM Fuel Cell could not work. Meanwhile, testing with UHP hydrogen produced the highest electrical power of 31.588 W at a flow rate of 450 mL/min with a load of 20 W. It indicates that the PEM Fuel Cell is optimal at the output power value with an efficiency of 69.80%.

Study on Solar Powered Electric Vehicle with Thermal Management Systems on the Electrical Device Performance Herlambang, Yusuf Dewantoro; Sulistiyo, Wahyu; Margana, Margana; Apriandi, Nanang; Nursaputro, Septiantar Tebe; Marliyati, Marliyati; Setiyo, Muji; Purwanto, Wawan; Rochman, Muhammad Latifur; Shyu, Jin Cherng
Automotive Experiences Vol 7 No 1 (2024)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.10506

This study aims to determine the reliability of applying a thermal management system in conjunction with Internet of Things in solar electric cars. In conventional electric cars or those whose driving energy source comes from gasoline fuel; the applied thermal management system is mainly used as a coolant for the internal combustion engine. However, for electric cars the thermal management system may be used for the main components such as controllers that convert solar module energy into electricity and batteries. Results from tests utilizing six DC fans for air cooling of the thermal management system yield two variations of battery charging conditions from the solar modules, namely variations of 25 and 400 turns of the trimmer constant current step-up charger. Test results from the proposed thermal management system show that the highest step-up charger temperature is 35.75 °C with voltage of 57.64 V for the variation of 25 laps. The test results on the battery voltage and temperature show that the highest battery temperature reaches 31.75 °C with voltage of 57.3 V at the variation of 25 rounds.

Co-Authors - Suwarti, - . Sahid . Wahyono A Fauzi, Abdul Syukur Achmad Widodo Adiba, Azka Fikral Ahmad Hamim Su’udy Al Huda, Luqman Alfauzi, Abdul Syukur AM Mufarrih Aminuyati Amrullah, Utsman Syah An Nizhami, Avicenna Andreas Wahyu Gunawan Anis Roihatin Annisa Dewi Agustin Antoro, Daffa Yudha Akbar Putra Anwar, Muhammad Khaerul Apriandi MS, Nanang Apriandi, Nanang Apriandi Apriansyah, Icvan Aris Fiatno Arnoldi, Dwi Azharuddin Balqis Balqis Bono . Bono Bono Budhi Prasetiyo Budhi Prasetiyo Carlos R. S. Dianisa Khoirum Sandi Dicky Septrianto Diny Agustina Rahayu Dr. Fatahul Arifin, S.T., Dipl.Eng.EPD., M.Eng.Sc Dwi Arnoldi, S.T., M.T. Dwiana Hendrawati Effendi, Sairul Elfrida Rizky Riadini Elhas, Rivan Ma’rivan Ella Sundari, S.T., M.T. Eri Prihatmini Evan, Bah F Gatot Sumarno, F Gatot F. Gatot Sumarno, F. Gatot Fachry Abda El Rahman Fatahul Arifin Fatahul Arifin Fatahul Arifin, Fatahul Feby Agasa Fenoria Putri, S.T., M.T. Franando, Franando Gatot Suwoto Gatot Yulianto Ghozali, Hanif Faizal Gustaf Susetyo Hadi, Kms. M. Hairul Hartanto, Jimmy Hermawan, Baktiyar Mei Hindrawati, Gita Huda, Muhamad Nurul Inayah Inayah Iwan Hermawan Iwan Setiawan Khoiri Rozi Khoirunnisa, Hilma Khoryanton, Ampala Khusna, Atina Nurul Kurnianingsih Kurnianingsih, Kurnianingsih Kurniawan Kurniawan Aldy Kusuma Lee, Shun-Ching Lusiana Rahmawati Margana Margana Marliyati Marliyati, Marliyati Mars Widodo Mochammad Denny Surendra Mochammad Denny Surindra Mochammad Facta Muhammad Arif Fadilah Muhammad Ikbal Muhammad Latifur Rochman Muji Setiyo Mulyono Mulyono Munawwaroh, Dita Anies Nabila, Lathifa Dylla Nafisah Amalia Nanang Apriandi Nanang Qosim Nandiyaguna Yusarindra Negara, Komang Metty Trisna Novarika, Wirda Nursaputro, Septiantar Tebe Padang Yanuar Padang Yanuar Pambudi, Yoyok Dwi Setyo Purwanto, Wawan Putri, Farika Tono Putri, Mega Purnama R, Rizky Amelia Rachman, Iqo Yovie Raditya Rizqy Wibowo Radjiq, Akhmad Ramadoni, Ramadoni Rani Raharjanti Rasid, M. RD. Kusumanto RM. Fauzi Romi Wilza Rr. Tony Yulianto Rusdianasari Sahid Sahid Sai'in, Ali Satito, Aryo Setiyawan, Trio Setyawan, Martando Robby Setyowati, Nur Shyu, Jin Cherng Siti Zulaikhah Slamet Priyoatmojo, Slamet Sudjito Soeparman Sudjito Sudjito Sugeng Widada Sugiono, Friska Ayu Fitrianti Supandi supriyo supriyo Supriyo Supriyo Supriyo Supriyo Suseno, Sigit Sutanto, Bayu Suwarti Suwarti Suwarti Suwarti Syahputra, Angga Panjy Teguh Aji Wibowo Teguh Harijono Mulud Teguh Harijono Mulud Timotius Anggit Kristiawan Udi Harmoko Vita Ayu Aspriyanti Wahyono Wahyono Wahyu Isti Nugroho Wahyu Sulistiyo Wahyu Triharto Prabowo Wahyuni, Puri Wibowo, Andryana Dwiandara Widodo, Ignatius Gunawan Wigiantoro Wigiantoro Willy Ravindo H Damanik Wilza, Romi Wiwik Purwati Widyaningsih Yahya Yanuar Mahfudz Safarudin Yehuda Tofan Indra Cahya Yosintaska Yosintaska Yudha Ramadhan Yusi Amalia Renaningtyas Zainal Abidin Zakaria Zakaria Zakki Fuadi Emzain Zamheri, Ahmad Zulhan Widya Baskara

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