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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik International Journal of Education Jurnal technoscientia Jurnal Teknologi Prosiding SNATIF Telematika ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Perlindungan Tanaman Indonesia JURNAL NASIONAL TEKNIK ELEKTRO JTET (Jurnal Teknik Elektro Terapan) JCRS (Journal of Community Research and Service) IJITEE (International Journal of Information Technology and Electrical Engineering) Jurnal Pendidikan dan Kewirausahaan Indonesian Journal of Electrical Engineering and Computer Science JURNAL TEKNOLOGI TECHNOSCIENTIA Jurnal Generic JAREE (Journal on Advanced Research in Electrical Engineering) Pasundan Journal of Mathematics Education : Jurnal Pendidikan Matematika Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal INFOTEL

Eka Firmansyah

Universitas Gadjah Mada

Author-ID : 266504

Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

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Attraction of Yellow Stem Borer (Scirpophaga incertulas Walker) to Different Colored Light-emitting Diodes Yhone Arialistya; Suputa Suputa; Y. Andi Trisyono; Eka Firmansyah
Jurnal Perlindungan Tanaman Indonesia Vol 23, No 2 (2019)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.37535

The yellow rice stem borer (Scirpophaga incertulas Walker) is a major pests on rice. Light traps have been used for monitoring and controlling S. incertulas with white and ultraviolet color light sources. The purpose of this research was to invent trap which uses an effective color that attracts S. incertulas. This research begins by sampling female S. incertulas pre-oviposition from the field then tested in the laboratory. The experiment was designed with factorial randomized block design with light colors and light intencity as factors. Light-emitting diodes used in this research, consisted of normal red, normal yellow, normal green, superbright red, superbright yellow, superbright green, superbright blue, UV, and white. LED white, UV, and superbright blue were attractive colors to S. incertulas when exposure time was 15 minutes. Effective light intencity to attract S. incertulas was 1000 lux.

Perancangan dan Implementasi Cyclic Redundancy Check – 16 sebagai Metode Error Checking pada Transmisi Pesan Protokol Modbus Remote Terminal Unit Berbasis Microcontroller Unit Arief Wisnu Wardana; Eka Firmansyah; Addin Suwastono
JURNAL NASIONAL TEKNIK ELEKTRO Vol 5 No 1: Maret 2016
Publisher : Jurusan Teknik Elektro Universitas Andalas

This paper presents about the Cyclic Redundancy Check – 16, a generator polynomial for error detection, which is normally used in MODBUS Remote Terminal Unit. It starts with explaining the noise phenomena that are often generated into a useful signal when it is transmitted through a noisy channel. Some types of error which usually affects bits of a transmitted data bytes are introduced. The complete method for designing a good generator polynomial for detecting the error is then presented. Next, Cyclic Redundancy Check -16 as an example of generator polynimial is discussed. The explanation includes method for software implementation of the CRC. Two methods are introduced which are loop – driven method and table - driven method. Finally, result of designed generator polynomial is shown, which consists of the algorithm and the routine example. The CRC -16 routine is then tested using some MODBUS messages.Keywords - Noise, generator polynomial, Cyclic Redundancy Check, MODBUS Remote Terminal Unit, lood – driven, table – driven, algorithm.Abstrak-Paper ini membahas tentang Cyclic Redundancy Check – 16, sebuah generator polynomial untuk mendeteksi error, yang biasanya digunakan pada MODBUS Remote Terminal Unit. Diawali dengan penjelasan tentang fenomena derau yang biasanya menyertai sebuah sinyal utama ketika sinyal tersebut ditransmisikan melalui sebuah kanal berderau. Beberapa tipe error yang biasanya mempengaruhi bit bit dari byte data yang ditransmisikan kemudian dijelaskan. Metode lengkap untuk mendesain sebuah generator polynomial untuk mendeteksi error kemudian dipaparkan. Selanjutnya, Cyclic Redundancy Check – 16 sebagai sebuah contoh generator polynomial dibahas. Pembahasan meliputi metode untuk implemenrasi software dari CRC tersebut. Dua metode diperkenalkan yaitu metode loop – driven dan metode table – driven. Pada bagian akhir, ditunjukkan hasil dari generator polynomial yang dirancang, yang terdiri dari algoritma nya dan salah satu contoh rutin programnya. Rutin CRC – 16 tersebut kemudian dites dengan menggunakan beberapa pesan MODBUS. Kata Kunci - Noise, generator polynomial, Cyclic Redundancy Check, MODBUS Remote Terminal Unit, lood – driven, table – driven, algorithm

PERANCANGAN DAN PENGUJIAN UNJUK KERJA SISTEM MONITORING KADAR LENGAS BERBASIS GYPSUM BLOCK UNTUK MEMANTAU DINAMIKA TANAH POLIETILEN, POLISTIREN DAN OTHER Agung Prasetyo; Eka Firmansyah; Lilik Sutiarso
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 8 No 2 Februari 2016
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v8i2.158

Soil moisture sensor (moisture content) is very important in determining the time a crop irrigation, soil wetting depth, the depth of the growth of plant roots and soil wetting sufficiency. This study discusses the design and implementation of the system of measuring soil moisture content of gypsum block based electronic. Measurement data are stored automatically in a database and then performed with a sensor calibration step gravimetric measurement results. The test results demonstrate system performance design performance measurement system with accuracy (%) error rate. Then used to determine gypsum block sensors with good performance

Sistem Pemanen Energi dengan Tranduser Piezoelektrik untuk Perangkat Daya Rendah Deddy Susilo; Eka Firmansyah; Litasari Litasari
Generic Vol 9 No 1 (2014): Vol 9, No 1 (2014)
Publisher : Fakultas Ilmu Komputer, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Sistem pemanen energi dengan sumber vibrasi yang diuji secara empiris terdiri dari tranduser piezoelektrik, diode penyearah dan penyimpan energi dengan super kapasitor. Studi empiris ini menghasilkan bahwa sistem penyearah yang tepat untuk mengambil energi skala ratusan miliVolt adalah diode schottky. Diode schottky mempunyai efisiensi 85% untuk sumber masukan di atas 1V. Waktu pengisian superkapasitor dengan sumber arus AC tidak terpengaruh frekuensi, tetapi dari besar amplitudonya. Efisiensi tranduser piezoelektrik paling tinggi pada frekuensi 10kHz dan 133kHz yakni 3,6% dan 22%. Resistansi keluaran tranduser menurun seiring dengan meningkatnya frekuensi. Pada pengujian perangkat mikrokontroler, sensor suhu dan RF transceiver dengan frekuensi pengiriman data 1, 5 dan 10 Hz diperoleh data bahwa pada frekuensi 1 Hz membutuhkan energi paling kecil.

Breakdown Voltage Using Bond Energy Calculation for CF3CHCl2/CO2 Mixture as Insulation Applied Tedy Juliandhy; T. Haryono; Eka Firmansyah; Indra Perdana
JAREE (Journal on Advanced Research in Electrical Engineering) Vol 3, No 1 (2019): April
Publisher : Department of Electrical Engineering ITS and FORTEI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25796216.v3.i1.68

Sulfur hexafluoride gas according to the Montreal Protocol and Kyoto protocol needs to be limited and gradually reduced because it causes global warming, the greenhouse effect and acid rain on the environment. The Kyoto protocol recommends the use of dichlorotrifluoroethane gas as one of the alternatives to substitute sulfur hexafluoride gas. This research discusses the use of dichlorotrifluoroethane gas mixed with CO2 gas which was known to be able to withstand the breakdown voltage of 592-870 kV. Comparing to breakdown voltage predictions using methods based on bond energy, Paschen's law and high voltage tests. Breakdown voltage deviations using bond energy were better than Paschen's law. The dichlorotrifluoroethane gas economy has a price of 5.18 times cheaper than hexafluoride sulfur gas. The ability of dichlorotrifluoroethane gas to insulation gas in gas insulated switchgear needs to be applied as a real potential substitute for sulfur hexafluoride gas.Keywords- bond energy, dichlorotrifluoroethane, gas insulated switchgear, Paschen’s law, sulfur hexafluoride, techno-economy.

Pengaruh Penutupan-Balik Tak-Sinkron terhadap Generator Induksi 3-Fase dalam Skema Pembangkitan Tersebar M. Isnaeni B. S.; F. Danang Wijaya; Eka Firmansyah
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 6 No 4: November 2017
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1258.822 KB)

Small and medium-scale plants connected to the distribution line form a distributed generation (DG) system. Unsynchronized reclosing, due to the operation of a recloser, is an important issue in DG systems. In this paper, simulations of typical DG system are performed to show the effect of unsynchronized reclosing. The simulation results show that unsynchronized reclosing causes the generator to experience over speed, over and under voltage, and over current, which can damage or reduce the life of the generator. A permanent short circuit that causes the contact of recloser to open and close repeatedly has a worse effect than a temporary short circuit. Opening the circuit breaker at point of common coupling with the installation of dummy load can reduce the bad effect of unsynchronized reclosing.

Sinusoidal Pulse Width Modulation Berbasis Lookup Table untuk Inverter Satu Fase Menggunakan 16-Bit Digital Signal Controller Yohan Fajar Sidik; Danang Wijaya; Eka Firmansyah
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 2 No 2: Mei 2013
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1208.499 KB)

Inverter as one equipment relates closely to the renewable energy sector gain more and more important role in utilizing renewable energy widely. The inverter converts dc to ac form by a specific switching strategy. In this research, the switching strategy employed unipolar sinusoidal pulse width modulation (SPWM). The switching schemes were obtained by synthesis from sine lookup table that the width of pulses were obtained from simulation of PSIM. The aim of this research is to create a switching scheme in a software and then implemented in16-bit digital signal controller (DSC). Experiment in lab scale has been done to verify the proposed unipolar SPWM. The results showed that SPWM signals were easier generated in 16-bit digital signal controller (DSC). Other that, feature of PWM in this DSC has been supporting in inserting dead-time to avoid shoot through current at IGBT.

Implementasi Komunikasi Data Berbasis ZigBee pada SCADA (Supervisory Control and Data Acquisition) PLTMh Beny Firman; Suharyanto; Eka Firmansyah
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 2 No 1: Februari 2013
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (742.631 KB)

Recently, Microhydro Power Center (Pusat Listrik Tenaga Mikrohidro or PLTMh) has been spread widely the energy electric generator. PLTMh control system in Indonesia often uses automatic control system. One of the reasons for this is that the operation and monitoring of the PLTMh could be done from a distance. One of PLTMh models of remote control is known as SCADA. One of the main parts of SCADA is Master Station (MS), Remote Terminal Unit (RTU) & Communication System. Communication System in SCADA can be built in several choices: wired or wireless. Remote control can be built using Wireless Sensor Network (WSN) system. The application of WSN in operating SCADA could ease installation and increase communication reliability. This study applied ZigBee technology on PLTMh SCADA control data communication. ZigBee was chosen because it’s free of operation and licensing charge, had OSI feature and low cost, those are reasons why they are best suited to PLTMh application. In the application, ZigBee hardware was divided into several parts: Coordinator on Master Station(MS) (one unit), End Devices which were each RTU unit point (two units) and Router as a data hooping between Coordinator & End Device (one unit). The furthest point between Coordinator and End Device through Router could reach 645 meters. This was tested in LOS (Line of Sight) condition. RSSI signal on ZigBee was used to see the strength of signal reception on Coordinator as data collector. RSSI score (-dBm) became smaller at maximum distance variation. This meant signal power at data jump point became lower. ZigBee based data communication to form SCADA network had been built well in join a network model, which was between Coordinator — Router — End Device at the furthest distance, 645 meters, with signal power of -82dBm.

Design of a Low Cost High Efficiency Multiple Output Self Oscillating Flyback Converter Yogi Sawitra; Prapto Nugroho; Eka Firmansyah; Wahyu Dewanto; Rudy Hartanto; Tiyono Tiyono; Tumiran Tumiran
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 1, No 2 (2017): June 2017
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

The use of some integrated circuits in an SMPS circuit are the main factor that increasing the cost. Self-oscillating feedback converter topology is a well-known circuit topology for low-cost application without using any single integrated circuit chip. In this paper, a Low Cost with high efficiency converter without any single integrated circuit component was analysed and designed. It has also multiple outputs of 3.3 V/1 A, 5 V/0.5 A, and 12 V/0.1 A so that it can be used as power supply for DVD player. Experiment results showed that it can deliver continuously output voltage as designed and a total output power of 7.3 W, with an efficiency for about 70%.

Parameter Identification of Nonlinear System on Combustion Engine Based MVEM using PEM Trigas Badmianto; Eka Firmansyah; Adha Imam Cahyadi
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 1, No 4 (2017): December 2017
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

In four-stroke engine injection system, often called spark ignition (SI) engine, the air-fuel ratio (AFR) is taken from the measurement of lambda sensor in the exhaust. This sensor does not directly describe how much AFR in the combustion chamber due to the large transport delay. Therefore, the lambda sensor is used only as a feedback in AFR control "correction", not as the "main" control. The purpose of this research is to identify the parameters of the non-linear system in SI engines to produce AFR estimator. The AFR estimator is expected to be used as a feedback of the main "AFR" control system. The process of identifying the parameters using the Gauss-Newton method, due to its rapid computation to Achieve convergence, is based on prediction error minimization (PEM). The models of AFR estimator is an open-loop system without a universal exhaust gas oxygen (UEGO) sensors as feedback, called a virtual AFR sensor. The high price of UEGO sensors makes the virtual AFR sensor can be a practical solution to be applied in AFR control. The model in this research is based on the mean value engine models (MVEM) with some modifications. The research dataset was taken from a Hyundai Verna 2002 with the additional UEGO type of lambda sensors. The throttle opening angle (input) is played by stepping on the gas pedal and the signal to the injector (input) is set to a certain quantity to produce the AFR (output) value read by the UEGO sensor. This research produces an open loop estimator model or AFR virtual sensors with normalized root mean square error (NRMSE) = 0.06831 = 6.831%.

Co-Authors -, Priyatmadi Addin Suwastono, Addin Adeguna Ridlo Pramurti Adha Imam Cahyadi Agung Prasetyo Agus Sujono Anang Budhi Nugroho Arief Wisnu Wardana Artakusuma, Dwi Dharma Beny Firman beny firman, beny Budi Nugroho CAHYADEWA, FELIX AUSTIN Deddy Susilo Dwi Dharma Artakusuma Dwiarifiyanti, Septian Fasa, Iraldy Laendra Fauzan, Naufal Hilmi Fikra Titan Syifa Fransisco Danang Wijaya Hanny Hafiar Hardiansyah Hardiansyah Harnoko St., Harnoko Inaya Retno Putri Indah Soesanti Indra Perdana Indrawan, Rully Iswanto Iswanto Johan Agung Irawan Kania, Enung Sri L. Heru Pratomo Leonardus Heru Pratomo Lesnanto Multa Putranto Lilik Sutiarso Litasari Litasari Maemonah, Maemonah Maulidia, Khoirina Dwi Ayu Meika, Ika Mohammad Yanuar Hariyawan Mokhammad Isnaeni Bambang Setyonegoro Mubarika, Melinda Putri Nasihin, Darojatun Nenden Mutiara Sari Nia Maharani Raharja Noor Pratama Apriyanto Noviarianto, Noviarianto Oyas Wahyunggoro Pebriyani, Nais Prapto Nugroho Pratama, Dimas Yanuar Pratomo, Saifurrahman Iman Priyatmadi Pujiastuti, Sulastri Putri, Inaya Retno R. Poppy Yaniawati R. Soekrisno Rahayu Kariadinata Rakhmat, Rizki Safari Ramadina, Ina RANI RANI, RANI Risanuri Hidayat Riz Rifai O. Sasue Rudy Hartanto S.Pd. M Kes I Ketut Sudiana . Sahrudin, Asep Septian, Cepi Sidik, Yohan Fajar Sihono, Soekrisno, R. Solihah, Siti Suharyanto Suharyanto Suharyanto Suharyanto SUHARYANTO SUHARYANTO Suharyanto Suharyanto Sujono, Agus suminar, Chandra Siti Supianti, In In Suputa Suputa T. Haryono T. Haryono Tarcisius Haryono Tedy Juliandhy Tiyono Toni Prasetya Trigas Badmianto Tumiran Wahidin, Didin Wahyu Dewanto Wahyudin, Yudin Wardana, Arief Wisnu Wicaksono, Ridwan Widyawan Wijaya, Danang Wijaya, Nur Hudha Wijaya, Nur Hudha Wulansari, Tantya Y Munandar Kolewora Y. Andi Trisyono Y. Munandar K. Yaniawati, Poppy Yhone Arialistya Yogi Sawitra Yulianie, Lia Yuwono Bimo Purnomo

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