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All Journal Buletin Udayana Mengabdi Jurnal Energi Dan Manufaktur Majalah Ilmiah Teknologi Elektro Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) INDONESIAN JOURNAL OF APPLIED PHYSICS International Journal of Engineering and Emerging Technology Majalah Ilmiah Teknologi Elektro
I Ketut Adi Atmika
Program Studi Teknik Mesin, Universitas Udayana, Bali
Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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PELATIHAN TEKNIK ELEKTROPLATING NIKEL BAGI INDUSTRI KERAJINAN KUNINGAN DI DESA KAMASAN KABUPATEN KLUNGKUNG T. G. Tirta Nindhia; I W. Surata; I K. Adi Atmika; D.N.K. Putra Negara; A.A.I.A. Sri Komaladewi; I M. Sucipta
Buletin Udayana Mengabdi Vol 12 No 2 (2013): Volume 12 No.2 – September 2013
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

The Village of Kamasan at Klungkung in the Province of Bali is recognized as a centre of metal handicrafts,especially the handicraft made from brass. Many home industries for the brass handicraft are established in thisvillage. Recently due to Rapid progress of Tourism in Bali, The brass handicraft in Kamasan are growing wellbecause the demand for the souvenir. However some problem arise such as limited of variation, and surface qualityof the brass handicraft that tend to become blurred or dull due to the process of oxidation. This condition makethe brass handicrafts become not so interest as silver handicrafts that can shine for quite long time. To overcomethis problem it is needed to coating the surface of the brass handicrafts so that there will be no contact withoxygen. The coating will be more benefit if able to exhibit more interesting appearance, as what nickel coatingcan affect the appearance of the surface to become like silver but more clear. Equipment for nickel elektroplatingwas designed for this purpose and donated for this purpose. The unique of the equipment that was donated weresmall in size therefore only low electric power is needed, only 1 liter electrolyte was used and can be use manytime. The positive result is obtained for this activity where all participants able to operate the elektroplatingprocess with excellent result.
PENERAPAN SISTEM SPRAY SEMI OTOMATIS PADA INDUSTRI KECIL BUDIDAYA JAMUR TIRAM I. N. Aribudiman; I. K. Adi Atmika; A. A. I. A. Sri Komaladewi
Buletin Udayana Mengabdi Vol 15 No 2 (2016): Jurnal Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

Ayu Suta mushrom group is a business group of farmers mushroom located in the village of Batubulan-Gianyar. Mushroom production is still only oyster mushroom, yields a simple packed with simple plastic bag.This business group has problems related to the efficiency and productivity which these problems are causedby the system is still conventional sterilization with small capacity and lack of system or mechanizationmaintaining the temperature and humidity incubation chamber messelium in conditions suitable for oystermushrooms. Then the human resources with an educational background which is still low. Objectives andoutcomes of the activities designed are: 1) generate system or mechanization of the process of regulating thetemperature and humidity of the room enlargement messelium, which is equipped with a spray of water orfog semi automatic, 2) provide knowledge about management, safety and product quality control in relationthe application of the system or mechanization. Settlement system problems or methods offered in thisprogram is to replace the equipment by designing the system or spray semi-automatic mechanization is alsoequipped with indicators of temperature and humidity. After designing mechanization water sprayer, thenbegan prepared materials and tools, and the first activity was implemented in partner dated August 27 2015,oyster mushroom cultivation place Ayu Suta in Batubulan Gianyar-Bali. Activities started with help clean
MENINGKATKAN PRODUKSI KACANG ASIN DENGAN MESIN SANGRAI SEMI OTOMATIS IK ADI ATMIKA; AA ISTRI AGUNG SRI KOMALA DEWI; TG TIRTHA NINDHIA
Buletin Udayana Mengabdi Vol 14 No 1 (2015): April 2015
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

UD Mekar Sari and Bina Sejahtera group is facing a lot of problems to make their product, among others :1) Oven Processing use the rolling machine which is relative modestly with small capacity. 2)Packing productwhich is manually done l by hand and use the candle to gum the plastic packer. 3)Mixturing flavour is also stillmanual so that is less flatten. Planning and making two semi-automatically machine dry-frying in order to havemore amount and better results compared to the appliance use conventional machine. This was also giving theknowledge of appliance, working safety and operation of quality product. The Community service started fromtechnical scheme and appliance making machine, then activity in field executed at 09 November 2013 for therecognition of appliance demonstration and also working safety recognition. This activity was conducted in desaBaluk, kabupaten Jembrana attended by 16 competitive people from various participants, among others : groupmember of Bina Sejahtera, team of community service, students of Mechanical Enginering Departement ofUniversity Udayana, some members from local society. The same activity, moreover was done in UD Mekar Sarion 12 November 2013.Keywords: UD Mekar Sari, Bina Sejahtera group, oven processing, small capacity
PENERAPAN MESIN PENGEPRES KRUPUK SPIRAL UNTUK MENINGKATKAN EFFISIENSI DAN KAPASITAS PRODUKSI KRUPUK PADA INDUSTRI KECIL Adi Atmika I K; I M. Gatot Karohika; Igp A. Suryawan
Buletin Udayana Mengabdi Vol 10 No 1 (2011): Volume 10 No.1 – April 2011
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

The process of producing krupuk traditionally passes some steps because it is still used the manual or conventional utensils, however the pressing step requires more sufficient time. Method used to overcome the above problems is by designing and making a machine of semiautomatic pressing row material. This machine is regulated by the electromotor transmission through belt which is fastened upon by pulley, and the rotation is reduced by gear with ratio 50: 1 to get the low rotation at primary axis. This designed machine can make a move to shuffle through as the wanted process. This community service activity was conducted for a group business of krupuk owned by Made Santa in Batubulan village on 25th and 27th August 2009. This Machine application turned out to improve the production capacities reaching 400 %.
Variasi berat roller sentrifugal Pada continuosly variable transmission (CTV) terhadap kinerja traksi sepeda motor Made Dwi Budiana P.; I Ketut Adi Atmika; IDG. Ary Subagia
Jurnal Energi Dan Manufaktur Vol 3, No.2 Desember 2008
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The automotive technology especially motorcycle has been innovated to improve the handling stability and comfortably. The developing of motorcycle technology has applied automatic transmission system. The automatic transmission has systems which need acceleration handling and break control. From this concept has been done to develop automatic transmission system according to variable which said Continuously Variable Transmission (CVT) system.The purpose of this experiment is to know effect weight of roller centrifugal in speed governor to traction performance. The analysis traction performance executed matchematic model with motorcycle Nouvo, 115 cc 4 strokes as vehicle model. Parameter input of this calculation include: vehicle speed (V = 0-30 km/h, V = 40-70 km/h, dan V = 80-90 km/h), engine torque, and vehicle dynamic model behavior. For get the answer, the expriment executed with simulation mode and then appealed with expriment on straightaway level.The obtained result on simulation and expriment : for roller centrifugal with 8 gr weight will gave the maximum traction performance on low speed until the acceleration on low speed is faster than the roller centrifugal 10.2 gr or 12 gr. However the roller centrifugal with 12 gr weight will gave the highest traction performance on the high speed until the vehicle easy to faster in high speed, and for roller centrifugal 10.2 gr weight (standard) have traction performance between roller centrifugal 8 gr and 12 gr. So, the roller 8 gr give the best performance traction, because at a low speed is required high acceleration.
Tinjauan Beban Aerodinamis Terhadap Kinerja Stabilitas Arah Kendaraan I Ketut Adi Atmika; I Putu Lokantara
Jurnal Energi Dan Manufaktur Vol 4, No.2 Oktober 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Beban aerodinamis atau gaya dan momen angin pada kendaraan dapat mempengaruhi kinerja kestabilan arahkendaraan. Seberapa besar pengaruhnya tentunya tergantung dari kondisi beban angin itu sendiri dan kondisi operasikendaraan.Penelitian ini dititik beratkan pada bagaimana memformulasikan beban dan momen aerodinamis dalam suatuplant kinerja stabilitas arah kendaraan. Analisa gerak kendaraan menggunakan metode Quasi Dinamik dan disimulasikanpada kondisi jalan datar dan jalan miring.Besarnya pengaruh beban aerodinamis terhadap prilaku arah kendaraan pada kondisi jalan datar dan jalanmiring berkisar antara 0 sampai dengan 0,00399 ditunjukkan oleh nilai yaw. Sedangkan sifat belok kendaraan awalnyaundersteer, kemudian dengan bertambahnya sudut steer tahap tertentu mengalami oversteer.
Pemurnian Biogas Dari Gas Pengotor Hidrogen Sulfida (H2S) Dengan Memanfaatkan Limbah Geram Besi Proses Pembubutan Komang Metty Trisna Negara; Tjokorda Gde Tirta Nindhia; I Made Sucipta; I Ketut Adi Atmika; Dewa Ngakan Ketut Putra Negara; I Wayan Surata; A.A.I.A. Sri Komaladewi
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

This research is intended to utilize waste steel chips from the process of turning (process in which lathemachine is used) for purification of biogas from the gas of hydrogen sulfide (H2S) contaminant to supportthe promotion of zero waste industrial and manufacturing process in the world. The waste of Iron chips iscollected and selected. Only long and spiral like of iron chips that are useful for this purpose. Since thechips having residual stress due to strain hardening during turning process, then the annealing processshould be done before compacting to form a billet.The thickness of the billet was 1 cm and 6 cm indiameter with weight 500 gram. The annealing proces was carried out by burning the iron chip until reachthe red color of fire. During the annealing process the iron inside the steel will react with oxygen to formiron oxide (Fe2O3) and if during oxidation there is a water vapor in the air then the iron bog ore Fe(OH)3 willbe formed. Both of Fe2O3 and Fe(OH)3 are very reactive to H2S and therefore able to eliminate the H2Scontaminant inside the Biogas. The billet is used as a filter and to be installed in the line of biogasdistribution. The result indicate that the the iron chips is potential to be utilized to reduce the H2Scontaminant in the biogas
Perbaikan Performa Traksi dengan Modifikasi Rasio Gigi Tansmisi I Gusti Agung Kade Suriadi; I Ketut Adi Atmika; I Made Dwi Budiana Penindra
Jurnal Energi Dan Manufaktur Vol 7 No 2 (2014): Oktober 2014
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Salah satu aspek penting dalam menentukan daya saing suatu produk otomotif adalahkemampuan atau performa traksi, yaitu kemampuan kendaraan untuk melakukan percepatan,melawan hambatan angin, melawan hambatan rolling, melawan gaya tanjakan dankemungkinan untuk menarik suatu beban. Besar kecilnya traksi untuk setiap tingkat gigi sertakecepatan kendaraan yang mampu dicapai dapat dikendalikan dengan mengatur rasio dantingkat transmisi. Rasio transmisi berpengaruh terhadap besarnya torsi yang dapatditransmisikan, sedangkan jumlah tingkat kecepatannya berpengaruh terhadap kehalusanproses transmisi dan transformasi daya pada sistem transmisi tersebut. Untuk mencariperbandingan gigi antara tingkat transmisi terendah dan tertinggi adalah dengan cara progresigeometri. Dasar dari penggunaan metode ini adalah untuk mendapatkan rasio dan jumlahtingkat kecepatan gigi transmisi pada daerah kecepatan operasi mesin yang sama sehinggafuel economy pada setiap gigi akan sama. Modifikasi rasio gigi menghasilkan kurva traksidimana jarak kurva gigi yang berdekatan semakin dekat. Hal ini menunjukkan kehilangan dayawaktu pemindahan gigi transmisi semakin kecil, atau dengan kata lain kinerja traksinyasemakin baik. Perancangan rasio dengan pemasangan 6 tingkat kecepatan,menghasilkankurva traksi dengan jarak antara kurva traksi sangat dekat, berarti kinerja traksinya palingbaik.Kata kunci: Gaya traksi, rasio gigi, jumlah tingkat kecepatan, hambatan rollingOne of important aspect in determining competitiveness of a product otomotif is tractionperformance, that is ability vehicle to incressing the acceleration, melawan of wind resistance,overcoming of rolling resistance, overcoming of grade resitance and possibility to draw anburden. The level of traction from gear ratio stage and also vehicle speed capable to bereached manageable by arranging ratio and number of level transmission. Transmission ratiohave an effect on to level of torque which can transmission, while amount mount its speed havean effect on to softness process the transmission and transformasi energy at the transmissionsystem. Giving for the gear ratio by progresi geometry method. Elementary from this methoduse is to get the ratio and sum up the level of speed at speed area operate for the samemachine so that fuel economy in each gear ratio will be equal. Modification of gear ratio givingthe traction curve where nearby gear ratio curve distance closer. Ratio scheme with theinstallation 6 stage of kecepatan giving traction curve with the distance of traction curve stingnear by, meaning best performance traction..Keywords: Traction, gear ratio, amount level stage, rolling resistance
Karakteristik Traksi Sepeda Motor dengan Continuose Variable Transmission System I Ketut Adi Atmika; I Dewa Gede Ary Subagia
Jurnal Energi Dan Manufaktur Vol 8 No 1 (2015): April 2015
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Inovasi teknologi otomotif khususnya sepeda motor terus dikembangkan untuk mendapatkankestabilan dan kenyamanan dalam pengendalian. Saat ini produsen sepeda motor telahmemproduksi kendaraan yang memakai sistem transmisi otomatik. Transmisi otomatikmerupakan sistem transmisi yang hanya membutuhkan pengendalian kecepatan danpengendalian pengereman. Dari konsep tersebut telah dikembangkan sistem transmisiotomatik secara variabel yang disebut dengan Continously Variable Transmission (CVT)sistem. CVT pada sepeda motor menggunakan speed governor yang mengatur kedudukanatau diameter puli primer untuk merubah ratio transmisi sesuai dengan putaran mesin.Penelitian ini bertujuan untuk mengetahui pengaruh berat roller sentrifugal yang terdapat dalamspeed governor terhadap kinerja traksi. Kinerja traksi dianalisa dengan melakukan pemodelanmatematik dengan kendaraan model sepeda motor Nouvo 115 cc, 4 tak. Sebagai parameterinput pada perhitungan meliputi : kecepatan (V = 0-30 km / jam, V = 40-70 km / jam, dan V =80-90 km / jam), torsi mesin, berat roller sentrifugal, dinamika kendaraan (gaya berat, gayahambat, dsb). Untuk dapat menjawab permasalahan yang timbul dilakukan penelitian denganmempergunakan metode simulasi yang dibandingkan dengan pengujian di jalan lurus datar.Dari hasil simulasi dan eksprimen dilapangan didapat : untuk berat roller sentrifugal 8 gr kinerjatraksi terbesar terjadi pada kecepatan rendah sehingga akselerasi pada kecepatan rendahpaling cepat dibandingkan dengan roller sentrifugal 10,2 (standar) atau 12 gr. Sedangkandengan berat roller sentrifugal 12 gr akan didapat kinerja traksi terbesar pada kecepatan tinggisehingga kendaraan akan mudah dipercepat pada kecepatan tinggi tersebut, dan untuk rollersentrifugal 10,2 gr (standar) memiliki kinerja traksi diantara roller sentrifugal 8 gr dan 12 gr.Kata kunci: CVT Sistem, Sepeda motor, Kinerja traksi, Simulasi, Roller Sentrifugal, Speed GovernorThe automotive technology especially motorcycle has been innovated to improve the handlingstability and comfortably. The developing of motorcycle technology has applied automatictransmission system.The automatic transmission has systems which need accelerationhandling and break control. From this concept has been done to develop automatictransmission system according to variable which said Continuously Variable Transmission(CVT) system.The purpose of this experiment is to know effect weight of roller centrifugal inspeed governor to traction performance. The analysis traction performance executedmatchematic model with motorcycle Nouvo, 115 cc 4 strokes as vehicle model. Parameter inputof this calculation include : vehicle speed (V = 0-30 km/h, V = 40-70 km/h, dan V = 80-90km/h), engine torque, and vehicle dynamic model behavior. For get the answer, the exprimentexecuted with simulation mode and then appealed with expriment on straightaway level.The obtained result on simulation and expriment : for roller centrifugal with 8 gr weight will gavethe maximum traction performance on low speed until the acceleration on low speed is fasterthan the roller centrifugal 10.2 gr or 12 gr. However the roller centrifugal with 12 gr weight willgave the highest traction performance on the high speed until the vehicle easy to faster in highspeed, and for roller centrifugal 10.2 gr weight (standard) have traction performance betweenroller centrifugal 8 gr and 12 gr..Keywords: CVT System, Motorcycle, Traction Performance, Simulation, Roller Sentrifugal,Speed Governor
Studi sistem kontrol suspensi dengan pemodelan delapan DOF untuk memperbaiki kinerja perilaku arah kendaraan I Ketut Adi Atmika; IGAK. Suriadi
Jurnal Energi Dan Manufaktur Vol 9 No 2 (2016): Oktober 2016
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (300.611 KB) | DOI: 10.24843/JEM.2016.v09.i02.p03

Abstract

Abstrak:Eksperimen ini bertujuan untuk memperoleh respon body moving yang sangat rendah sehingga kenyamanan dan keamananpenumpang dapat terpenuhi, dengan mengatur konstanta damper dan level dudukan pegas secara kontiniu denganmenggunakan kontrol neuro fuzzy yang mengambil parameter input kecepatan kendaraan, sudut belok steer, getaran body ,sudut kemiringan body, anggukan body maka diharapkan damper ratio menjadi rendah (baik) untuk segala medan operasi dantimbul efek down-roll pada body kendaraan saat kendaraan belok. Metode eksperimen menggunakan simulasi dengan data-dataplant, baik untuk suspensi kontrol PID maupun yang sudah menggunakan kontrol fuzzy secara kontiniu.Validasi hasil kinerjaantara suspensi kontrol PID dan suspensi kontiniu kontrol fuzzy dianalisa dengan menggunakan diagram bode, Nichols, PoleZero dan Niquist Hasil menunjukan bahwa respon body moving dengan control fuzzy rolling guling tertinggi berkisar -2 sampai 2artinya respon yang sangat rendah, sedangkan respon body moving dengan PID tertinggi -3 sampai dengan 3 dan terendah -2sampai dengan 2. Kesimpulannya respon body moving menggunakan control fuzzy lebih baik dibandingkan denganmenggunakan PID. Oleh karena itu disarankan untuk menindak lanjuti eksperimen ini pada berbagai merk kendaraan dandiaplikasikan untuk memperoleh kenyaman dan keamanan penumpang.Kata kunci: Kontiniu kontrol fuzzy , Damping ratio , Up-roll , Down-roll , Simulasi NiquistAbstract:The objective of this experiment is to find out the lowest body moving response of four-wheel vehicles to meet passengerscomfort and safety. And this can be carried out by continuous regulation of damper and elevator using neuro fuzzy control. Theparameters used here are the speed input of the vehicle, steer turning angle, the body's vibration and slanting angle as well asbody's pitching. It is hoped that the damper ratio can be low (good) for any field and can arouse down-roll effect on the bodywhen the vehicle is turning. This experiment used simulation method with plant data for suspension using Proportional IntegralDifferential (PID) control and the one using continuous fuzzy control. The suspension performance from these two controls wasthen analyzed using Bode and Niquist diagrams. The result shows that the body moving response using the fuzzy control canreach –2 to 2, the highest and close to 0, the lowest, which means that the response is low. While the body moving responseusing PID control can reach –3 to 3, the highest and –2 to 2, the lowest. It can be concluded that the moving body responseusing fuzzy control is better than the one using PID control. It is suggested that further experiment using different brand namecar be conducted.Keywords: Continuous fuzzy control, Damping ratio, Up-roll, Down roll, Niquist simulation.
Co-Authors Aldri Frinaldi Anak Agung Istri Agung Sri Komaladewi Anak Agung Istri Agung Sri Komaladewi Dewa Ngakan Ketut Putra Negara I Dewa Gede Ary Subagia I Dewa Made Wikananda Surya Kusuma I Gusti Agung Kade Suriadi I Gusti Ketut Sukadana I Gusti Ngurah Priambadi I Gusti Ngurah Putu Tenaya I Ketut Sudiana I Made Dwi Budiana Penindra I Made Gatot Karohika I Nyoman Aribudiman I Nyoman Sutantra I Wayan Surata I Wayan Widhiada I.A.N Pramadyanti Igp A. Suryawan Komang Metty Trisna Negara Made Dwi Budiana P. Made Sucipta Made Widiyarta NPG Suardana Putu Lokantara Robby GDS Siti Helmyati Steven FS Tjokorda Gde Tirta Nindhia