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All Journal Rotasi Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Dielektrika : Jurnal Ilmiah Kajian Teori dan Aplikasi Teknik Elektro Jurnal Abdi Insani Jurnal Pendidikan Teknik Mesin Undiksha Jurnal Teknik Mesin Mechanical Xplore Jurnal Bakti Nusa IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Jurnal Karya Pengabdian Teknik Mesin Energy, Materials and Product design Jurnal Wicara Desa
I Made Mara
Mataram University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences

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SIMULASI SISTEM ELECTRONIC DIFFERENTIAL SEBAGAI PENGATUR MOTOR INDUKSI PADA MOBIL LISTRIK MENGGUNAKAN TEKNIK FIELD ORIENTED CONTROL Muhamad Majedi; I Nyoman Wahyu Satiawan; I Made Mara
DIELEKTRIKA Vol 3 No 2 (2016): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

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Abstract

Penggunaan gearbox (differential mekanik) untuk stabilisasi roda kendaraan masih memiliki kekurangan yaitu perlunya perawatan secara rutin dan penyaluran torsi putar dari motor induksi ke roda tidak maksimal dikarenakan masih terdapat banyak losses pada gear. untuk memaksimalkan penyaluran torsi pada mobil listrik, kita membutuhkan suatu sistem untuk mengatur kecepatan motor penggerak roda kendaraan listrik secara elektronik. Penelitian ini membuat simulasi sistem electronic differential yang dikendalikan dengan teknik scalar control (V/F) dan teknik field oriented control dengan menggunakan software Simulink MATLAB version 7.8.0.(R2009a). Dari hasil simulasi dan pengujian, sistem electronic differential mampu bekerja seperti halnya differential secara mekanik, hal ini ditunjukkan saat kendaraan melaju di jalan yang lurus sistem electronic differential mampu memberikan referensi kecepatan yang sama dan referensi kecepatan yang berbeda pada kedua motor penggerak roda saat kendaraan sedang berbelok. Penggunaan teknik filed oriented control pada electronic differential memberikan performa yang lebih baik jika dibandingkan dengan teknik scalar control (V/F), hal ini di tunjukan dengan menghasilkan waktu steady state yang lebih cepat dan ripple torsi yang lebih kecil. Kata Kunci : Electronic Differential, Filed Oriented Control, Scalar Control (V/F), Mobil Listrik
PENYULUHAN TENTANG PENGELOLAAN SAMPAH DI SMA 1 KOTA BIMA i made suartika; hendry sakke tira; I made mara; I kade wiratama; made wijana -
JURNAL KARYA PENGABDIAN Vol 1, No 2 (2019): April, Jurnal Karya Pengabdian
Publisher : Universitas Mataram

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Abstract

Tujuan dari kegiatan pengabdian pada masyarakat di SMA 1 Kota Bima adalah memberikan penyuluhan tentang pemahaman tata cara, model, dan teknologi yang digunakan dalam pengelolaan sampah. Siswa sebagai sumber sampah di sekolah perlu diberikan pemahamam tentang pentingnya pengelolaan sampah. Dengan bertambahnya pemahaman siswa terhadap pengetahuan dan teknologi, diharapkan dapat meningkatkan peran aktif masyarakat (siswa) dalam pengelolaan sampah. Langkah ini merupakan salah satu upaya untuk mengurangi sampah dari sumbernya. Dengan berkurangnya sampah dari sumbernya akan membantu kinerja (efisiensi, efektifitas) pemerintah dalam pengelolaan sampah dan sekaligus dapat meningkatkan kualitas fungsi lingkungan.Metode yang digunakan dalam  kegiatan ini adalah metode penyuluhan. Penyuluhan dilakukan dengan cara mengumpulkan siswa kemudian diberikan ceramah mengenai bahaya dan manfaat sampah, model dan teknologi pengelolaan sampah. Kata Kunci: Sampah, Metode Pengelolaan Sampah, Teknologi Pengelolaan Sampah
Pengeringan Dodol Buah Skala Rumah Tangga Memanfaatkan Energi Alternatif Ida Bagus Alit; I Gede Bawa Susana; I.G.A.K. Chatur Adhi W.S.; I Made Mara; Sujita Sujita
JURNAL KARYA PENGABDIAN Vol 3, No 1 (2021): April, Jurnal Karya Pengabdian
Publisher : Universitas Mataram

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Abstract

Energi alternatif sebagai sumber daya alam dapat digunakan untuk meningkatkan kesejahteraan masyarakat.  Pemanfaatan energi tersebut dilakukan melalui penerapan teknologi yang murah dan mudah dipahami masyarakat. Salah satu pemanfaatannya adalah dalam proses pengeringan produk pertanian khususnya dodol buah. Hal ini dilakukan dengan menerapkan alat pengering menggunakan sumber energi biomassa sekam padi. Biomassa sekam padi dapat digunakan sebagai sumber energi untuk mengeringkan dodol buah melalui konversi energi termal. Hal ini berimplikasi pada proses pengeringan yang lebih singkat dan produk akhir lebih higienis karena tidak terkontaminasi debu atau kotoran lainnya. Dodol buah dikeringkan di dalam lemari tertutup.
PENGARUH pH DAN PUTARAN PENGADUKAN PADA FERMENTASI MOLASE TERHADAP HASIL AKHIR PRODUKSI BIOETANOL Egamiati; Tri Rachmanto; I Made Mara
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Until now, oil and gas are the main energy sources in the world. Indonesia is a country with high energy utilization. Energy sources in Indonesia still come from fossil fuels. Burning fossil fuels, such as oil and gas, can cause the greenhouse effect. Therefore we need an alternative energy (biofuel) that is not harmful to the ecosystem. One example of biofuel is bioethanol. This study used 2 variations, namely stirring rotation (800, 1000 and 1200 rpm) and fermentation pH (4, 4.5 and 5). So from the two variations, 9 kinds of treatment were obtained with 3 repetitions so that the total sample was 27. The purpose of this study was to determine the effect of stirring rotation (rpm) and pH of fermentation on the final yield of bioethanol production. The production of bioethanol is carried out by a fermentation process for 48 hours, then distilled to obtain bioethanol. The results of this study indicate that the variation of fermentation pH is the most dominant factor on the level of bioethanol produced, while for the volume of bioethanol produced the most dominant factor is the stirring rotation. The treatment that produced the highest volume of bioethanol was a stirring rotation of 1000 rpm and a fermentation pH of 4 with an average volume of 1234.3 mL and the highest alcohol content was obtained at a stirring rotation of 1000 Rpm and a fermentation pH of 5 with an average value of 81.3%.
PERANCANGAN CHASIS KENDARAAN LISTRIK UNIVERSITAS MATARAM A.A. Alit Triadi; Tri Rachmanto; I Made Mara; I G. N. K. Yudhyadi; Nur Kaliwantoro
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Chassis is the main component of the vehicle that functions to support the engine, body, suspension system, electrical system and driver. Chassis is one part of the vehicle that has an important role so careful planning is needed in its manufacture. Chassis must be strong and sturdy to support the load of the driver, electric motor and accessories. In addition, the chassis must also be light so as not to overload the work of the electric motor and be able to go through various road conditions. The vehicle body is its function to shape the vehicle and also protect the people inside. In this design, steel and aluminum materials are used, then simulated using the Autodesk Inventor software. The goal is to determine the Von Mosses stress value on the chassis design. AISI 1018 steel material with a load of 700 kg, 800 kg, and with a load of 900 kg obtained a value of 5.56. The safety factor obtained is still safe because it is above the safety factor for industrial construction design, namely 4. Aluminum 6061 material with a load of 700 kg, 800 kg and with a load of 900 kg obtained a value of 7.46. The safety factor obtained is still safe because it is above the safety factor for industrial construction design, namely 4.
ANALISIS SUDUT BELOK DAN KECEPATAN TERHADAP RADIUS BELOK MOBIL LISTRIK I Made Mara; A. A. Alit Triadi; Andrian Suci Rahmawan
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

As the number of cars increases, the number of accidents that occur is directly proportional to the number of accidents that occur, namely 117,949 cases and this increases by around 8.3% annually, mostly due to driver negligence and lack of vehicle stability. One important aspect in car design is the steering system which influences the response of the vehicle's steering motion to steering wheel input and has a major influence on comfort as well as safety. The purpose of this study was to determine the turning radius at various speeds and turning angles and to determine the ratio of the turning angle to the turning angle of an electric car. In the analysis phase, calculations are carried out based on slip analysis to obtain the turning radius at various speeds and turning angles, and the ratio of the turning angle to the turning angle of the electric car. At the testing stage it is carried out by determining the steer rotation angle based on the specified turning angle. The results of this study are at a speed of 30 Km/hour with a turning angle of 240 resulting in the smallest turning radius, that is, in the analysis of 5.5 m and 5.75 m of experiment and the smallest percentage of turning radius, namely the results of the analysis are 4% smaller than the experimental results. At a speed of 50 Km/hour with a turning angle of 150 produces the largest turning radius, namely, in the analysis of 9.5 m and 9 m experiments and the greatest percentage of turning radius, namely the results of the analysis are 13% smaller than the experimental results. From the results of the analysis, the ratio of the turning angle to the turning radius is 18:1.
STUDY PENGEREMEN PADA MOBIL LISTRIK HASIL MODIFIKASI A.A. Alit Triadi; Achmad Zainuri; I Made Suartika; I Made Adi Sayoga; I Made Mara; I Dewa Ketut Okariawan
Energy, Materials and Product Design Vol. 3 No. 1 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Every three accidents occur every hour in Indonesia, according to the Director of Road Traffic at the Ministry of Land Transportation, with a percentage of over 50-70 percent and 30 percent of accidents occur due to poor performance of the brake system. Accidents occur due to insufficient braking distance and lack of understanding of the braking characteristics of the vehicle being driven. The aim of this research is to analyze the distance, time and braking force required for an electric car to move until it stops with variations in speed and vehicle load. This research was carried out using an experimental method where a prototype electric car was run by varying the speed and load of the vehicle to obtain braking time and distance and analyzing the data obtained. The shortest braking distance at a speed of 20 km/hour with a vehicle load of 950 kg is 4.39 meters. The longest braking distance is 14.78 meters at a speed of 40 km/hour with a vehicle load of 1050kg. The fastest braking time is at a speed of 20 km/hour with a vehicle load of 950 kg, namely 1.97 seconds. The longest braking time was at a speed of 40 km/h with a vehicle load of 1050 kg, namely 2.76 seconds. The smallest braking force is at a speed of 20 km/hour with a vehicle load of 1050 kg, namely 2098.36 N. The largest braking force is at a speed of 40 km/hour with a vehicle load of 950 kg, namely 4132.65 N.
Pengenalan Produk Modifikasi Mesin Ketinting Dengan Penambahan Alternator Kepada Nelayan Tradisional i dewa ketut okariawan; I Kadek Wiratama; Achmad Zainuri; I Made Mara; Nur Kaliwantoro
JURNAL KARYA PENGABDIAN Vol. 6 No. 1 (2024): April, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v6i1.166

Abstract

ABSTRAK Kegiatan pengabdian kepada masyakakat di desa Dara Kunci kepada kelompok masyarakat nelayan tradisional ini bertujuan untuk mengurangi beban operasional dan meningkatkan produktifitas dan mengentaskan kemiskinan dalam jangka panjang. Dalam operasionalnya terutama melaut di malam hari, nelayan menggunakan aki untuk mensuplai daya lampu penerangan. Untuk penerangan 4 lampu 5 watt aki 12 volt hanya mampu bertahan selama 4 jam sehingga perlu melakukan inovasi/modifikasi mesin perahu agar bisa mengisi aki sendiri. Dengan menggunakan lampu penerangan yang telah modifikasi ini diharapkan nelayan dapat menambah jam operasionalnya yang biasanya hanya disiang hari menjadi malam hari. Bertambahnya jam operasi nelayan akan dapat meningkatkan tangkapan nelayan. Begitu pula dengan kemampuan nelayan merawat mesin perahu secara baik dan benar akan dapat menambah umur pemakain mesin. Sehingga kegiatan ini diharapkan dapat meningkatkan pengetahuan dan kesejahteraan masyarakat pesisir. Metode yang digunakan untuk mencapai tujuan kegiatan adalah metode penyuluhan perawatan mesin prahu dan pelatihan tentang teknologi lampu penerangan nelayan saat melaut pada malam hari. Untuk penerapan lampu penerangan saat melaut di malam hari dan penyuluhan perawatan mesin perahu digunakan metode Participatory Action Research (PAR) yaitu; melibatkan masyarakat kelompok nelayan secara langsung dalam kegiatan mulai dari penyiapan, perencanaan, dan pembuatan maupun pengoperasian alat sehingga nelayan dapat melaksanakan sendiri pembuatan lampu penerangan saat melaut di malam hari dan perawatan ringan perahu setelah kegiatan berakhir. Adapun hasil dari kegiatan ini adalah Mesin ketinting sebagai penggerak perahu dapat dimodifikasi dengan menambahkan alternator sebagai carge aki, dengan lama pengisian aki selama 4 jam dan peningkatan konsumsi bahan bakar sangat kecil yaitu 7 persen. Hasil dari penyuluhan ini adalah sekarang masyarakat lebih aman dan nyaman untuk melaut pada malam hari karena sudah ada lampu diperahunya yang sekaligus dapat membuat ikan mendekatinya. Dengan adanya pengisian aki mereka tidak lagi cemas akan kehabisan daya aki saat melaut. Begitu juga untuk perbaikan kerusakan kecil perahu sudah dapat ditangani sendiri.
Pengaruh Posisi Penyemprotan Bahan Bakar Gas Lpg Pada Intake ManifoldTerhadap Konsumsi Bahan Bakar Pada Mesin Bensin Empat Langkah Satu Silinder (Honda Supra X) Nuarsa, I Made; Mara, I Made; Riskon, Riskon
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 2, No 1 (2012): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

One of major sources of air pollution is the result of combustion exhaust gases of automotive engines. As it is known that the process of fuel combustion from motor fuel produces exhaust gases which theoretically contain elements of CO, NOx, HC, CO2, H2O and N2, where many of which are polluting the surrounding environment in the form of air pollution. The use of LPG fuel for gasoline engine can be done by adding a piece of equipment called a conversion kit. In this study the fuel in the LPG gas injected in the intake manifold with some variation of spin injection with 3000 rpm, 4500 rpm and 6000 rpm for each transmision rate (Neutral s / d Gear 4). The result showed that the injection of fuel gas LPG in the rear position (P3) in getting a decrease in fuel Consumtion (FC) is optimal compared to other injection position (P1, P2). In addition the maximum fuel. Consumtion obtained at transmission rate at each round of variation mesin. Lowes CO emission levels found in LPG fuel injection in the rear position (P3) on the engine rev 3000 rpm kadar CO2 in round 3000 engine rpm optimum obtained from the use of LPG gas fuel injection in the rear position (P3) fornearly all transmision levels. Lowest HC emission values obtained on the location of the feul gas injection LPG rear position (P3) at 3000 rpm rotation at the 4th gear.
PENERAPAN IPTEK BIOGAS “MENUJU KONSEP DESA MANDIRI ENERGY-DME” DI DESA RARANG LOMBOK TIMUR Mara, I Made; Suartika, I Made
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 5, No 1 (2015): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

The implementation of science and communities service project is aimed to minimize destitution by implementing self feeding and energy generating village concept. The specific goal of this project is the utilization of cattle dung to produce a biogas. The method is being used for this project is by illuminating and educating the community to be able to build and operate the cattle dung biogas digester by their own. In addition, the community is completely involved to this project since the early state of this project. By implementing the plastic floating digester, it is hoped that the communities be able to utilize the biogas digester and make their own domestic energy. The result of this program is an unit biogas digester by using cow dung as a feed stock. The plastic floating digester can produce a continue biogas as a fuel for cooking. The enthusiasm of the community in term of using and implementing the digester is quite high. It is expected that the community can build and implement the cattle dung digester to produce biogas as a domestic energy.
Co-Authors A. A. Alit Triadi A.A. Alit Triadi Achmad Zainuri Agus Dwi Catur Ahmad Wardi Salim, Ahmad Wardi Allo Padang, Yesung Andrian Suci Rahmawan Arif Mulyanto, Arif Barlian Mahendra, Barlian Benoit, Fransiskus Yusdwi Benoit Toding Bima, Rangga Bima, Rangga Bima Didin F Fane, Didin F Egamiati Firman Aryanto, Firman Fitri Handayani Fitri, Imayatul hendry sakke tira I G. N. K. Yudhyadi I G.A.K Chatur Adhi W.A. I Gede Bawa Susana I Kade Wiratama I Kade Wiratama, I Kade I Made Adi Sayoga I Made Adi Sayoga, I Made Adi I Made Nuarsa, I Made I Made Suartika I Made Suartika I Made Suartika I Nyoman Wahyu Satiawan I.D.K. Okariawan Ida Bagus Alit Islami, Nurul Hida Wahyuni L. Edsona Furqan Prina, L. Edsona Furqan Lastika, I Gusti Kadek Dodi Made Wijana Made Wirawan, Made Mahendra, Esa Ramdhan Ardi Muhamad Majedi Muhammad Firdaus Muliadi Harianhady, Muliadi Musyahadati, Shufi Nur Kaliwantoro Okariawan, I Dewa Ketut Paramitha, Ni Ketut Rizka Widya Pramana, Yoga Tri Pratama, Imam Akbar Puad, Rae Nanda Azmi Rahmadi, Fakhmi Caesar Riskon Riskon, Riskon Rudy Sutanto saputri, lia Sasono, Marendra Sinarep Sinarep Sujita Sujita Suteja Suteja, Suteja Towilan Ma’bud, Towilan Tri Rachmanto Yesung Allo Padang, Yesung Allo