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INDONESIA
TEKNIK
Published by Universitas Diponegoro
ISSN : 08521697     EISSN : 24609919     DOI : -
Core Subject : Engineering,
Engineering
Journal yang mempublikasikan artikel-artikel ilmiah dari berbagai disiplin ilmu rekayasa/keteknikan. Artikel-artikel yang dipublikasikan di Jurnal TEKNIK meliputi hasil-hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), atau komentar atau kritik terhadap tulisan ilmiah yang dipublikasikan oleh Jurnal TEKNIK.
Arjuna Subject : -
Articles 522 Documents
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Perancangan Uninterruptible Power Supply (UPS) untuk Peningkatan Fleksibilitas Penggunaan dan Lebih Ekonomis dengan Inverter Kendali Pulse Width Modulation (PWM) Berbasis Mikrokontroler ATmega 328 Lubis, Rakhmad Syafutra; Haris, Abdul; Tarmizi, Tarmizi
TEKNIK Vol. 43, No. 1 (2022): May 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i1.32736

Abstract

As the high electrical load increases, power outages can occur suddenly while using electronics and often will cause damage to both software and hardware from the electronic load. To solve this problem, can use an UPS. but UPS also still has weaknesses that become the basis for consideration of its use not yet widespread, such as the price is still expensive and the backup time is short, Therefore, the design of a single-phase ac power supply with a PWM Inverter controller based on the Atmega 328 Microcontroller was carried out to increase the flexibility of the UPS using a current flow pattern according to a bidirectional ac power supply and simplified in this study to make it more economical with fewer diodes and MOSFETs. Total harmonic distortion (THD) voltage is 5.24%, output frequency is 49.56 Hz, output voltage and voltage drop meet the standard with the UPS device consisting of a transformer, adapter and inverter with adjustable switching frequency and filters.
Optimasi Multirespon Pada Proses 3D Printing Material ABS Dengan Metode Taguchi-PCR Topsis Yopi Yusuf Tanoto; Vincensius Filbert; Ronaldo Febrian; Nicholas Adriel
TEKNIK In Press
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i2.43301

Abstract

3D printing atau additive manufacturing merupakan teknologi yang saat ini perkembangannya cukup pesat dan banyak diaplikasikan sebagai teknologi rapid prototyping. Filamen acrylonitrile butadiene styrene (ABS) merupakan salah satu jenis polimer yang sering digunakan dalam teknologi 3D printing. Pada penelitian ini dilakukan sembilan kali percobaan dengan menggunakan metode desain eksperimen orthogonal arrays L9 () dan tiga parameter proses yang digunakan yaitu nozzle temperature, base plate temperature dan orientasi serta dengan tiga variasi level pada setiap parameter proses (230oC, 240oC, 250oC, 90oC, 100oC, 110oC, 0o, 45o, 90o). Tujuan dari penelitian ini adalah untuk mencari parameter proses yang paling optimal terhadap hasil respon waktu pengerjaan, sifat mekanik kekuatan lentur, dan akurasi dimensi. Sehingga, digunakan kombinasi metode Taguchi dan PCR-TOPSIS untuk menyelesaikan persoalan multirespon. Berdasarkan dari hasil analisis ANOVA dimana parameter proses yang paling berpengaruh terhadap respon akurasi dimensi didominasi oleh nozzle temperature, sedangkan untuk respon kekuatan lentur (flexural strength) dan juga waktu proses pencetakan sama-sama dipengaruhi oleh parameter proses orientasi. Untuk hasil analisis dari PCR-Topsis terhadap 3 parameter proses dimana orientasi juga yang memiliki persen kontribusi paling besar yaitu sebesar 33%.
Pengaruh Jumlah Slot pada Permanent Magnet Synchronous Generator (PMSG) Terhadap Nilai Back EMF dan KE yang Berbasis Finite Element Method (FEM) Slash Arthur Edi Sumawang; subuh Pramono
TEKNIK In Press
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i2.44519

Abstract

A generator can produce electricity with three required conditions: a magnetic field, a coil, and a change in flux passing through the coil. The place to put the coil on the generator is called a slot. The number of slots can affect the characteristics of the generator. Changing the number of slots affects Back EMF and KE with a fixed generator geometry dimension. The simulation uses coiled wire with a diameter of 1 mm. In this research, PMSG 12s10p was designed, and the slots were varied into 15s10p and 24s10p. The PMSG 12s10p has 12 slots with 188 coils, the 15s10p has 15 slots with 158 coils, and the 24s10p has 24 slots with 79 coils. The simulation results show that the average DC voltage on PMSG 12s10p, 15s10p and 24s10p is 256,138 V, 277,340 V and 198,299 V, respectively. Electrical constant (KE), the KE value for each PMSG variation is 2.53 (PMSG 12s10p), 2.64 (PMSG 15s10p) and 1.89 (PMSG 24s10p). The simulation results show that PMSG 15s10p produces the largest back EMF and KE values.
Rancang Bangun Kanula Hidung Aliran Tinggi dilengkapi Sistem Humidifikasi untuk Hipoksemik Akut Ernia Susana; Indah Nursyamsi Handayani; Agus Komarudin
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.42888

Abstract

High-Flow Nasal Cannula (HFNC) is a non-invasive oxygen therapy device that aids in administering high-flow oxygen to patients with acute respiratory distress syndrome. Since the end of 2019, the worldwide demand for HFNC devices has risen dramatically because of the Covid-19 outbreak. Multiple studies have endorsed HFNC as a treatment strategy for individuals in the early infection phase (stage 1) until they enter the pulmonary phase (pulmonary phase). Therefore, in anticipation of the need for these devices, the Indonesian Ministry of Health encourages the development of HFNC as a step towards self-sufficiency in domestic medical device products. This article describes the design of an HFNC prototype based on components accessible on the local market and a software system based on open source. The research design uses engineering design. The HFNC device is intended to create a fraction of inspired oxygen (FiO 2) in the range of 30-100%, which is regulated by two settings: oxygen flow rate and compressed air. The test results demonstrate that the FiO 2 correction value satisfies the HFNC product test method requirements of less than 5% Oxygen for every air flow rate and compressed air setting. In addition, the airflow rate measurement meets the threshold value of 60 lpm. Based on testing using performance measurement tools, it can be concluded that the HFNC design can be used as a therapeutic tool for acute hypoxia.
Properties of Thermal Conductivity Hybrid Epoxy Resin Composite Reinforced Natural Fiber as Alternative Insulator Material Ketut Suarsana; DNK Putra Negara; Igpagus Suryawan
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.42496

Abstract

The properties of composite materials are highly dependent on the constituents used as reinforcement such as natural fibers with a matrix. This research was conducted to determine the effect of chemical solution treatment of NaOH and Silane coupling agent on fiber with concentration on thermal conductivity properties. The research involved processing fiber from nettle plant by decortication to obtain a single fiber. The hybrid composite process uses the hand lay-up molding method. The fibers were treated with a chemical solution of NaOH and Silane at concentrations of: 3 and 6% for 2 hours, had a length of 5 mm, and in random orientation. The ratio of the nettle fiber reinforced resin matrix to the weight ratio of natural fibers was 10, 15, 20 and 25%. The results obtained that the highest thermal conductivity properties with a fiber composition of 25% in the chemical solution treatment of 6% Silane of 0.1995 Watt/moK. On the other hand, the lowest with a composition of 10% natural fiber with 3% NaOH treatment of 0.1099 Watt/moK. The low thermal conductivity of hybrid composites can be applied as an insulator
Kajian Komposit Berbasis Paduan Logam Magnesium Berpenguat Keramik untuk Aplikasi Ortopedi Franciska Pramuji Lestari; Ika Kartika; Ariadne Lakshmidevi Juwono; Anawati Anawati
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.46575

Abstract

Komposit berbasis logam Magnesium (Mg) merupakan material maju yang potensial diaplikasikan untuk implan biodegradabel yang bersifat sementara. Mg memiliki sifat biodegradabel, biokompatibel serta memiliki densitas yang mendekati tulang sehingga dapat mengurangi stress shielding antara tulang dan implan. Namun, Mg memiliki laju degradasi yang relatif cepat yang dapat menurunkan sifat mekaniknya di dalam lingkungan fisiologis dan kurangnya sifat bioaktivitas. Di sisi lain, biokeramik yang kerap digunakan sebagai bahan implan tulang dan gigi bersifat bioaktif dan bioinert. Penggabungan Mg dan keramik dapat menjadi sebuah material komposit untuk aplikasi biomedis dengan peningkatan sifat mekanik dan biokompatibilitas serta laju degradasi yang imbang. Dalam kajian ini, dibahas secara komprehensif kemajuan riset material komposit berbasis Mg dengan paduan logam Mg sebagai matriks, berbagai material keramik yang umum digunakan sebagai penguat, fasa-fasa penguatan pada komposit, proses manufaktur serta perlakuan panas pada komposit berbasis magesium. Komposit berbasis Mg menjadi material yang menjanjikan untuk aplikasi biomedis karena kombinasi sifat mekanik yang baik, berat jenis yang rendah, dan kemungkinan untuk mencapai laju korosi yang lebih lambat serta meningkatkan penyembuhan dengan adanya material bioaktif.
Analisis Performa Mekanik Autonomous Car Dengan Metode Region of Interest Menggunakan Raspberry Pi 4 dan Arduino Nano Martinus Hendra Dewantara; Leonardus Heru Pratomo; Slamet Riyadi
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.47582

Abstract

The development of artificial intelligence science and technology has now begun to penetrate the automotive sector. Autonomous car is one of them that is now starting to take on the role with several capabilities such as lidar sensors, GPS systems, and image reading through the camera. In this paper, an autonomous car uses an image reading system using a camera as an optical sensor. Object detection is needed in real time because the autonomous car continues to move along the track. Researchers use HSV color classification with the Region of Interest method, which has the ability to mark certain areas so that it can be used to optimize system performance to detect and classify trajectories quickly and precisely. This autonomous car uses a 4WD system with a DC motor as the main driver, Raspberry Pi 4 and Arduino nano as the mainboard for operation. The test method in this study includes testing image processing using the Region of Interest, this test includes road detection that has been designed and mechanical testing of the propulsion used in this autonomous car. In this study, trials have been carried out and this prototype successfully works according to the algorithm that has been made. In this trial, the AGV using the ROI method has very accurate reading and movement accuracy. In trials and hardware implementations carried out in this autonomous car laboratory with artificial intelligence, it can work according to the algorithm created with a success rate of 90%.
Analysis of Ankle Foot Design for Transtibial Prosthesis Components using the Finite Element Method Wahyu Dwi Lestari; Ndaru Adyono
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.48653

Abstract

Finite element method (FEM) has been identified as a tool that can be used to analyze stress and strain behavior occurring in prosthetic components of the lower extremities. The main objective of this study was to analyze the structure of the alternative ankle foot designed for the transtibial prosthesis component. The ankle foot is designed and simulated for strength using Solidworks software. There are two alternative designs of the ankle foot that are designed. The material used is AISI 304 with Young's Modulus 193000 MPa and Poisson's Ratio 0.29. Based on the design results, the lowest weight is owned by alternative design 1 of 491.69 grams. The simulation was carried out under normal running conditions in the midstance phase. The applied load is 1000N. There are three data obtained from the simulation results in the form of von Mises stress, deformation, and strain energy. Based on the simulation results on alternative ankle foot design 2, the value of von Misses stress is lower. Even so, the two alternative designs that have been designed are still within safe limits because they still meet the predetermined safety factor value. 
Synthesis and Performance Evaluation of Magnetized Modified Coal Fly Ash as Adsorbent for Naphthol Blue Black Dye Removal from Synthetic DyeWastewater Restu Kusumawardani; Aprilina Purbasari
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.48337

Abstract

The removal of dyes from wastewater has become a major concern in the textile industry due to the adverse effects of dyes on the environment. This research focuses on the adsorption of naphthol blue black (NBB) dye by synthesizing coal fly ash with alkali (sodium hydroxide solution) and Fe3O4 (magnetite) to accelerate the separation of dyes from aqueous solutions. Magnetized modified coal fly ash (MMCFA) was characterized by XRF, SEM, and FTIR analysis. Batch experiments were carried out to study the effect of pH, initial concentration, and contact time on the efficiency of dye removal. The results showed that the adsorption of NBB dye reached the optimum condition at initial concentration of 100 mg/L with pH of 6 and contact time of 120 minutes. The ability of MMCFA to adsorb NBB dye was higher than that of sieved coal fly ash (SCFA) and modified coal fly ash (MCFA). The addition of alkali and Fe3O4 can be proven to increase the adsorption ability of SCFA. The percentage of NBB dye that was adsorbed by MMCFA, MCFA, and SCFA at optimum condition was 96.39%, 89.83%, and 89.33%, respectively.
Pengaruh Variasi Arah Medan Magnet Pembakaran Premixed Minyak Nabati terhadap Karakteristik Nyala Api pada Tungku Industri Dony Perdana
TEKNIK Vol. 43, No. 3 (2022): December 2022
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v43i3.39701

Abstract

Penelitian ini bertujuan untuk memahami dampak berbagai arah medan magnet dan campuran minyak nabati terhadap bentuk, tinggi, dan suhu nyala api selama pembakaran premixed. Penelitian ini penting untuk menggantikan bahan bakar fosil dengan minyak nabati. Bahan bakar yang digunakan adalah campuran minyak kapas dan jarak Blending 50% (B50) diisikan ke ketel dengan volume 600 ml, kemudian dipanaskan dengan suhu 300oC dan menempatkan 2 magnet permanen diujung burner. Penelitian ini menemukan kekuatan medan magnet yang besar terjadi dimedan magnet tarik, sehingga membuat nyala api lebih terang (transparant) dan lebih stabil dibandingkan dengan magnet tolak dan tampa magnet. Medan magnet menghasilkan gaya lorent secara kontinyu memotong mata rantai kimia bahan bakar mengakibatkan getaran magnetic dinyala api, beberapa Oksigen (O2) memisahkan diri dari kelompoknya menyebabkan lepasnya elektron sehingga bilangan oksidasinya meningkat maka terjadilah kenaikan temperatur nyala api yang diakibatkan reaksi pembakaran cepat. Aliran udara yang diinduksi secara magnetis oleh medan magnet di sekitar nyala api menyebabkan konveksi di sekitar nyala api, yang menghasilkan perubahan penurunan ketinggian nyala api.

Page 42 of 53 | Total Record : 522

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