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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) TELKOMNIKA (Telecommunication Computing Electronics and Control) JURNAL ELEKTRO ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Proceeding of the Electrical Engineering Computer Science and Informatics Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer Sinkron : Jurnal dan Penelitian Teknik Informatika CogITo Smart Journal Jurnal Sisfokom (Sistem Informasi dan Komputer) MITRA: Jurnal Pemberdayaan Masyarakat EPIC : Journal of Electrical Power, Instrumentation and Control Jurnal Mantik SABDAMAS Jurnal Locus Penelitian dan Pengabdian Jurnal Teknologi dan Manajemen Industri Terapan ROUTERS: Jurnal Sistem dan Teknologi Informasi Jurnal Pengabdian Masyarakat Charitas Metris: Jurnal Sains dan Teknologi Cylinder : Jurnal Ilmiah Teknik Mesin
Karel Octavianus Bachri
Program Studi Teknik Elektro, Fakultas Biosains, Teknologi Dan Inovasi, Universitas Katolik Indonesia Atma Jaya Jakarta
Aerospace Engineering Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences

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Perbaikan Kondisi Keseimbangan Lintasan Produksi Dengan Penerapan Metode Genetic Algorithm Pada Lintasan Produksi Muffler K-59J PT XYZ Sutomo, Febryan; Hidayat, Trifenaus Prabu; Bachri, Karel Octavianus
Metris: Jurnal Sains dan Teknologi Vol. 23 No. 01 (2022): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v23i01.2961

Abstract

PT. XYZ merupakan sebuah perusahaan manufaktur yang bergerak dibidang otomotif dan sudah berjalan sebagai supplier komponen otomotif untuk beberapa perusahaan otomotif terkemuka di Indonesia. Kebanyakan proses produksi pada PT. XYZ sudah berjalan dengan baik. Tetapi terdapat salah satu sub produk mereka yang memiliki kendala dalam proses produksinya yaitu muffler K-59J. Pada lintasan produksi muffler K-59J dinilai kurang optimal dalam proses produksinya. Hal tersebut dilihat dari banyak kendala yang timbul selama proses produksi berlangsung. Mulai dari terjadi penumpukan (bottleneck), Target produksi harian sering tidak tercapai sehingga sering terjadi waktu kerja tambahan (overtime), dan jika dilihat secara data nilai efisiensinya hanya sebesar 58,81 %. Dengan demikian, penelitian ini bertujuan untuk meningkatkan performa dari lintasan produksi tersebut. Oleh karena itu diusulkan metode Algoritma Genetik yang bersifat komputerisasi untuk meningkatkan performanya. Proses penyelesaian penelitian ini dilakukan dengan bantuan program matlab dalam pengerjaan metode Algoritma Genetik. Pada prosesnya, dilakukan beberapa tahapan mulai dari membuat representasi genetik, menyeleksi populasi induk, melakukan rekombinasi dan mutasi, dan regenerasi populasi. Tetapi terdapat sedikit perbedaan pada penlitian ini dimana populasi awal yang dibentuk merupakan populasi yang sudah tersaring kedalam syarat-syarat keseimbangan lintasan antara lain sesuai dengan diagram alurnya, dan jumlah waktu stasiun kerja tidak melebihi cycle time. Dari hasil pengerjaan metode Algoritma Genetik tersebut, didapatkan besar efisiensi lintasan sebesar 74,07 % dengan total stasiun kerja sebanyak 18 stasiun kerja. dengan demikian nilai efisiensi lintasan berhasil ditingkatkan sebesar 15,26 %.
Simulasi Pengendalian Kecepatan Putar Motor DC Menggunakan Metode Logika Fuzzy Hutapea, Duma Kristina Yanti; Sachi, Haenuki; Kusmanto, Willy; Herianto, David; Fernanto, Nico; Bachri, Karel Octavianus
Metris: Jurnal Sains dan Teknologi Vol. 24 No. 02 (2023): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v24i02.4725

Abstract

This paper discusses DC motor rotational speed control using fuzzy logic method. The system works by utilizing ultrasonic sensors to detect distance. The detected distance affects the rotational speed of the DC motor which is controlled by the Arduino UNO microcontroller. Fuzzy logic is applied to the Arduino UNO microcontroller in which distance as the input, and the rotational speed of the DC motor in the form of Pulse Width Modulation as the output. There are several classifications of distance: very close, close, normal, far and very far. In addition, there are several classifications in the motor rotational speed response: slow, very slow, medium, fast, and very fast. The design of the fuzzy logic system is carried out in the Arduino IDE application and MATLAB using the Mamdani method at the inference stage. Fuzzy logic system is run on the Arduino UNO microcontroller in which the simulation is carried outthrough Proteus application. The test results show that the largest percentage of errors/discrepancies between the Proteus system design and the MATLAB is 1.55%. In the future, this simulation can be applied to systems such as self-driving cars.
Analisis Kekuatan Purwarupa Swing Arm Untuk Sepeda Motor Listrik: Studi Kasus Pada PT “SC” Bachri, Karel Octavianus; Soewono, Arka Dwinanda; Nabil, Alfi
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 9 No 2 (2023): OKTOBER 2023
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v9i2.4982

Abstract

In recent years, the automotive industry has been experiencing a significant transition from internal combustion engines that use fossil fuels to electric vehicles. PT “SC” is one of the leading companies engaged in converting and developing electric vehicles in Indonesia. This research aims to conduct a strength analysis of the swing arm prototype developed by PT “SC”. Simulations were performed using SolidWorks software to determine the impact of static loading on the von Mises stress and strain experienced by the swing arm made from SS 400 material. The total load on the swing arm was 1610N based on the electric dynamo's weight and the possible passengers' weight on the electric motorbike. The stress analysis results show that the maximum and minimum Mises stresses ​​are 5.38 x 106 N/m2 and 1.99 x 10-1 N/m2, respectively. This stress produces a maximum displacement value of 4.54 x 10-3 mm. Calculation results from Solidworks found that the safety factor for the swing arm prototype was 43, meaning the design is safe to use.
Design and Implementation of Two-Axis Solar Tracker Bachri, Karel Octavianus; Wilson; Mulyadi, Melisa; Wijayanti, Linda; Hutapea, Duma Kristina Yanti; Siregar, Marsul
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 9 No 2 (2023): OKTOBER 2023
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v9i2.4983

Abstract

Makalah ini membahas perancangan dan implementasi sistem penggerak panel surya 2 sumbu dengan menggunakan motor servo yang dikendalikan oleh mikrokontroler arduino uno, sistem ini bekerja berdasarkan masukan sensor LDR sebanyak empat buah yang dipasang pada masing-masing sisi panel surya dan satu buah yang dipasang di tengah modul solar panel tersebut.Sensor LDR pun dihubungkan pada mikrokontroller yang akan mengolah masukkan yang diberikan menjadi keluaran tegangan kepada motor servo.Motor servo yang dipakai diperancangan alat ini sebanyak dua buah yang akan meggerakkan panel surya menuju arah vertical dan horizontal. Pengujian dilakukan dengan beberapa tahap seperti pengujian hasil yang didapatkan oleh panel surya dengan berbagai kondisi,pengujian sensor cahaya dan pengujian keseluruhan.Sehingga mendapatkan hasil yang cukup baik dan memuaskan,kedua motor servo dapat bergerak menerima hasil keluaran yang diberikan oleh mikrokontroller dan kelima sensor LDR dapat menerima cahaya matahari dan mendeteksi arah cahaya matahari secara cukup baik sehingga perancangan alat mendapatkan hasil keseluruhan secara cukup baik. Hasil keseluruhan daya yang didapat secara maksimal oleh panel surya sebanyak 12V yang akan bergerak mengikuti arah cahaya matahari.
Pengaruh Penggunaan Octane Booster Terhadap Konsumsi Bahan Bakar Kendaraan Roda Empat Bachri, Karel Octavianus; Satryanatha, Josaphat Febrian; Fortino, Antonius Edwin; Soewono, Arka Dwinanda
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 9 No 1 (2023): APRIL 2023
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v9i1.5024

Abstract

Due to increasing fuel prices, most people in Indonesia choose to use fuel with an octane rating of 90. However, using fuel with a lower Research Octane Rating or RON can affect the performance and efficiency of vehicle engines, especially if the compatibility between fuel octane and the engine's compression ratio is neglected. One solution to this problem is adding an octane booster to RON-90 gasoline to resemble gasoline with an octane rating of 92. The purpose of this research is to conduct an experimental study to see the effect of using a commercially available octane booster on the fuel consumption of a multi-purpose vehicle with an engine capacity of 1500 cc. Fuel consumption testing was performed using a road test based on the full-to-full method. The measurement results show that using an octane booster in RON -90 gasoline can reduce vehicle fuel consumption by 6.82%. However, the decrease in fuel consumption is still less compared to vehicles using RON-92 gasoline. Economic analysis found that using an octane booster in a motorcar could be a cost-efficient alternative to a more expensive RON-92 petrol.
Analisis Gangguan Pada Sistem Gardu Listrik Berbasis Gas Insulated Switchgear 150 kV Dengan Metode High Voltage Test Bachri, Karel Octavianus; Jonathan, Edoardo; Soewono, Arka Dwinanda
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 9 No 1 (2023): APRIL 2023
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v9i1.5029

Abstract

The insulator system in substations is essential in maintaining safety and efficiency in electricity transmission and distribution lines. The purpose of this research is to conduct High Voltage tests to check possible malfunctions in a gas-insulated switchgear (GIS) in a 150 kV substation following IEC standard 62271-203. Insulation Resistance (IR) measurement results for components in the GIS system show that the system still has high insulation resistance for the R, S, and T phases. High voltage testing results for the three-phase Gas Insulated Switchgear also did not exhibit current leakage, meaning the system still operates satisfactorily.
Rancang Bangun Sistem Pembersih Panel Surya Berbasis Arduino Uno dan Analisis Efektivitas Metode Pembersihan Kering dan Basah Terhadap Efisiensi Energi Erik Agustian Yulanda; Karel Octavianus Bachri; Muhamad Jaelani Sidik; Agi Tama; Joko Tri Susilo
EPIC Journal of Electrical Power Instrumentation and Control Vol 8 No 1 (2025): EPIC
Publisher : Universitas Pamulang, Prodi teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/epic.v8i1.58282

Abstract

Penurunan efisiensi panel surya akibat akumulasi debu dan kotoran merupakan permasalahan umum pada sistem Pembangkit Listrik Tenaga Surya (PLTS), terutama di lingkungan yang berdebu dan lembap. Oleh karena itu, diperlukan penelitian untuk menyediakan sistem pembersihan alternatif yang efektif sekaligus hemat energi. Penelitian ini bertujuan untuk mengembangkan sistem pembersih panel surya berbasis Arduino Uno yang beroperasi menggunakan dua metode, yaitu pembersihan kering dan pembersihan dengan air. Sistem ini terdiri atas motor stepper Nema 23 untuk pergerakan linier, motor DC 12 V untuk rotasi sikat, pompa air DC 12 V, serta dua limit switch yang berfungsi untuk membalik arah putaran motor stepper. Pengujian dilakukan dengan membandingkan nilai tegangan, arus, dan daya keluaran panel sebelum dan sesudah pembersihan, serta mengukur konsumsi energi sistem pembersih untuk setiap metode. Hasil penelitian menunjukkan bahwa metode pembersihan kering mampu meningkatkan daya panel dari 1,10 W menjadi 1,33 W (peningkatan sebesar 20,91%) dengan konsumsi energi sebesar 0,097 Wh per siklus. Sementara itu, metode pembersihan dengan air meningkatkan daya dari 0,80 W menjadi 1,32 W (peningkatan sebesar 65,00%) dengan konsumsi energi sebesar 0,187 Wh per siklus. Kedua metode menghasilkan perolehan energi bersih positif masing-masing sebesar 0,133 Wh dan 0,333 Wh. Hasil analisis menunjukkan bahwa sistem yang dikembangkan memiliki efisiensi energi yang baik dan berpotensi untuk diimplementasikan sebagai solusi efektif dalam pemeliharaan panel surya.
Pelatihan Kecerdasan Buatan Menggunakan Teachable Machine untuk Siswa SMA Kelas XI Catherine Olivia Sereati; Ferry Rippun Gideon Manalu; Pascalis; Yudha Harnoko; Melisa Mulyadi; Sandra Octaviani B. Widiarto; Linda Wijayanti; Karel Octavianus Bachri; Widodo Widjaja Basuki; FLORENTIA ANGELINA
Jurnal Pengabdian Masyarakat Charitas Vol. 6 No. 01 (2026): Jurnal Pengabdian Masyarakat Charitas Juni 2026
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v6i01.7605

Abstract

Digital literacy is crucial today, especially as artificial intelligence (AI) technology begins to develop. AI technology is widely discussed because it can help to improve efficiency in various fields of activity. The development of AI technology is basically aimed at improving human welfare, but there are disadvantages when AI technology is not used properly, which can harm society. To achieve beneficial outcomes and avoid the harm caused by the misuse of AI technology, it is deemed necessary to provide AI technology training to the community as early as possible. This community service activity provided AI training to students from Strada Santo Thomas Aquino High School, which has a mission that strongly supports the objectives of this training. This training activity began with an introduction to AI technology, which aimed to make students familiar with and understand the features of AI technology so that they are aware of the existence of AI around them. Students were explained how AI works, from database collection to pattern recognition, and were made aware that the use and development of AI technology must be carried out ethically and responsibly. The training method included an explanation of the importance and dangers of AI technology through presentations, discussions, and teamwork using the "Teachable Machine" application. Evaluation of activities was carried out through pretests and posttests as well as student feedback. The results showed an improvement in students' understanding of AI technology after participating in this training. The students were highly satisfied with the AI technology training provided, both in terms of the accuracy of the material explanation, the abilities of the instructors, and the benefits they received.
Keberlanjutan Akses Air Bersih melalui Sumur Bor dan Pompa Air Tenaga Surya di Desa Bila Cenge Andre Sugioko; Trifenaus Prabu Hidayat; Enny Widawati; Karel Octavianus Bachri
Jurnal Pengabdian Masyarakat Charitas Vol. 6 No. 01 (2026): Jurnal Pengabdian Masyarakat Charitas Juni 2026
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v6i01.7712

Abstract

Southwest Sumba Regency is located in the province of East Nusa Tenggara, part of the Sumba Islands, which are famous for their natural beauty. This area offers a unique combination of stunning landscapes, distinctive cultural richness, and community life that still upholds local traditions. However, behind all that, there are several fundamental problems that still occur in Southwest Sumba Regency, especially stunting. Stunting is the main problem in this location. Stunting is chronic malnutrition in toddlers, which results in stunted growth in both height and weight. One of the factors causing stunting is the lack of access to clean water and proper sanitation. Clean water is very important in maintaining personal hygiene, food, and the environment so that it can prevent various diseases that can inhibit children's growth. The construction of drilled wells is one effective solution to overcome the problem of access to clean water in areas prone to stunting. With the existence of drilled wells, the community will have easier access to clean water so that it can improve the quality of life and health, especially for children. From the identified problems, the solution offered is the procurement of drilled wells with solar-powered pumps (PLTS). Thus, the problem of access to clean water and energy sources to operate the drilled well can be resolved. Then it can be developed in various locations/areas that have not received access to water. The capacity of the drilled well that has been made produces an output of 50 liters/hour. This output has been in accordance with the target of devotion.
Optimasi Histeresis Smart Relay Zelio pada Sistem Pompa Booster untuk Peningkatan Efisiensi Energi dan Kualitas Kinerja Cycling Agi Tama; Karel Octavianus Bachri; Joko Tri Susilo; Erik Agustian Yulanda; Bambang Iwan Suryana
Jurnal Teknologi dan Manajemen Industri Terapan Vol. 4 No. 4 (2025): Jurnal Teknologi dan Manajemen Industri Terapan
Publisher : Yayasan Inovasi Kemajuan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55826/jtmit.v4i4.1362

Abstract

Stabilitas tekanan distribusi air bersih merupakan tantangan krusial dalam pengelolaan infrastruktur gedung bertingkat, di mana tekanan seringkali jatuh di bawah ambang batas operasional 2 bar. Penelitian ini bertujuan merancang sistem kendali pompa booster yang optimal untuk mengatasi inefisiensi energi dan ketidakstabilan tersebut. Metode yang diterapkan adalah perancangan panel kontrol dengan sistem jogging tiga pompa yang dikendalikan oleh Smart Relay Zelio dan sensor Pressure Switch Digital. Kebaruan penelitian ini terletak pada penerapan optimasi histeresis sebesar 1 bar pada sistem Zelio tiga pompa yang belum pernah diuji sebelumnya, guna meminimalkan frekuensi cycling dan mencegah fenomena chattering. Berdasarkan pengujian komparatif selama 9 jam, sistem yang diusulkan berhasil menurunkan konsumsi energi total dari 48,97 kWh (sistem konvensional) menjadi 32,88 kWh. Hal ini setara dengan penghematan energi sebesar 32,86%. Selain efisiensi, sistem ini terbukti menyeimbangkan beban kerja antar pompa secara otomatis melalui algoritma jogging. Kontribusi penelitian ini adalah penyediaan strategi kendali otomatis berbasis Smart Relay yang terbukti handal, stabil, dan hemat energi untuk manajemen utilitas bangunan modern.
Co-Authors Adang Suwandi Ahmad Agi Tama Agi Tama Alexander, Justin Alvinson, Gregorius Andre Sugioko Anthon de Fretes Anthony , Jean Arka Dwinanda Soewono Arwin Datumaya Wahyudi Sumari Bambang Anggoro Soedjarno Bambang Iwan Suryana Bryan Santoso Bunardi, Marcelinus Eric Catherine Olivia Sereati Christine Natalia Duma Kristina Yanti Duma Kristina Yanti Hutapea Enny Widawati Erik Agustian Yulanda Fernanto, Nico Ferry Rippun Gideon Manalu, Ferry Rippun Gideon FLORENTIA ANGELINA Fortino, Antonius Edwin Hadikusuma, Ridwan Satrio Herianto, David Hidayat, Renaldi Irpan Restu Ade Putra Joko Tri Susilo Jonathan, Edoardo Karangga, Yusaphat Phosa Kartadinata, Budi Kelvin, Dimas Kevin Kevin kevin Khayam, Umar Kusmanto, Willy Lanny W Lanny W. Pandjaitan Lestari, Hesti Tri Linda Wijayanti Lukas Maria Angela Kartawidjaja Marsellinus Bachtiar Wahju Marsul Siregar Marten Darmawan Melisa Mulyadi Micha Thesania Katarine Michael Deni Perdana Putera Muhamad Jaelani Sidik Muhammad Risqi Nuryana Nabil, Alfi Nova Eka Budiyanta Osmond, Edbert Pandjaitan, Lanny W. Pangestu, Devin PANJAITAN, LANNY Pardosi, Cristoni Hasiholan Pascalis Paschalis, Sebastian Michael Paskalis, Yohanes Maria Jonathan Glenn PRAWIRA, WASKITO Putera, Michael Deni Perdana PUTRA, SADIANA Rippun G. Manalu, Ferry Rizki Surya Permana Rory Anthony Hutagalung Sachi, Haenuki Sandra Octaviani B. Widiarto Satryanatha, Josaphat Febrian Setiawan, Axel Gilbert Soewono, Arka Soewono, Arka D. Surya Permana, Rizky Surya Widjaja, Williem Sutomo, Febryan Tajuddin Nur Theresia Ghozali Timothy Sutjipto, Marcellus Timothy Wijaya, Hans Tobias Mikha Sulistiyo Trifenaus Prabu Hidayat Veronica Windha Mahyastuty Widodo Basuki Widodo Widjaja Basuki Wijaya, Nickolas Dario Wijaya, Toby Wilson Yudha Harnoko Zefanya, Maria