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Jurnal SPEKTRUM

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Published by Universitas Udayana

ISSN : 23023163 EISSN : 26849186 DOI : -

Core Subject : Science, Engineering,

Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

Jurnal SPEKTRUM is peer review journal, published four times a year by the Department of Electrical Engineering, Faculty of Engineering, Universitas Udayana. This journal discusses the scientific works containing results of research in the field of electrical, include: power systems, telecommunications, computers, informatics, controls, and electronics. Authors are expected to include original scientific papers in accordance with the scope of the discussion of this journal including all aspects of the theory and practice are used.

Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro

Articles 13 Documents

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Search results for , issue "Vol 9 No 3 (2022): Jurnal SPEKTRUM" : 13 Documents clear

RANCANG BANGUN CONTROLLER BLDC BERBASIS MIKROKONTROLER STM32 BLUE PILL PADA KENDARAAN LISTRIK URBAN AGNIJAYA WEIMANA Mas Nyoman Ngadeg A. C.; I Nyoman Satya Kumara; I Putu Elba Duta Nugraha
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The increase in the consumption of fuel oil causes the depletion of fossil fuel reserves. One alternative energy solution that can be utilized is electrical energy. One of the efforts to overcome the energy crisis can be realized in a creativity in the energy efficient car contest (KMHE). The Weimana Team of Udayana University participated in the urban concept category of electric motor drive under the name Agnijaya Vehicle. One important aspect in order to be able to compete and win the competition is the Motor Controller. In this paper, the results of the research are presented on a design of a Brushless DC Motor Controller based on the STM32 Blue Pill microcontroller and used to rotate the BLDC motor on the Agnijaya Weimana Urban Electric Vehicle. The specifications of the BLDC controller design are made to have a power dissipation inverter with a power of 1980 Watt connected to an 800 Watt sensored BLDC motor. The STM32 Blue Pill microcontroller-based Brushless DC Motor Controller has been successfully designed and manufactured and produces a sinusoidal output waveform containing switching noise when connected to a no-load BLDC motor. The performance to drive Agnijaya Wimana's Urban Electric Vehicle is capable of implementing a PWM duty cycle of up to 100% with an average current achievement of 24,775 Ampere, an average voltage drop of up to 48,485 VDC, an average power rating of up to 1200,5 Watt and a BLDC motor speed up to 419,5 RPM.

PERBANDINGAN ALGORITMA SUPERVISED MACHINE LEARNING UNTUK SISTEM PENGHINDARAN HALANGAN PADA ROBOT ASSISTANT UDAYANA 02 (RATNA02) Yohanes Andre Setiawan; Yoga Divayana; Wayan Widiadha
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Supervised Machine Learning can make robots smarter by making decisions automatically. This study compares various Supervised Machine Learning algorithms to determine the best algorithm that can be used on Robot Assistant Udayana 02 (RATNA02). The algorithms to be compared are Artificial Neural Network (ANN), Support Vector Machine (SVM), Decision Tree (DT), Random Forest (RF), Naïve Bayesian (NB), and K-Nearest Neighbor (KNN). Models were created using the TensorFlow and SKLearn libraries. The model is trained using 100.000 data of left sensor, right sensor, front sensor, robot offset, and data label. Data preprocessing is done using MinMaxScalar and LabelEncoder. The comparisons that will be measured are accuracy, training duration, and file size of the model. DT and RF algorithms get 100% accuracy followed by ANN, KNN and SVM with 99.87%, 97.42% and 98.52% respectively, and NB with 87.34%. Fastest training duration was achieved by NB for 0.03 seconds, followed by DT for 0.08 seconds, while other algorithms took more than one second. The smallest file size is owned by NB with a size of 2kb and DT ranks second with 4kb, other algorithms have a file size of more than 25kb. Decision Tree Algorithm is the best because the duration of the model training is relatively fast, the file size is small, and the accuracy is high.

PERANCANGAN DAN IMPLEMENTASI RESTFUL API PADA SISTEM INFORMASI MANAJEMEN DOSEN UNIVERSITAS UDAYANA Ida Ayu Kaniya Pradnya Paramitha; Dewa Made Wiharta; I Made Arsa Suyadnya
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Lecturer Management Information System (SIM Dosen) Udayana University is a management information system to assist lecturers in improving performance in providing higher quality education. SIM Dosen was designed using a monolithic architecture will switch to a microservice architecture that is more flexible because it breaks down several applications into several services. Communication between services is carried out through the HTTP protocol using a RESTful API. This research focuses on the success of designing a RESTful API on one of the modules on the SIM Dosen which is “data dosen” module. RESTful API was successfully designed using the Java programming language and MySQL database. Testing the RESTful API functionality using the black box testing method and Postman on local device for GET, PUT, and DELETE method display a 200 response code and OK status, and for POST method display a 201 response code and Created status which indicate all the functions of each HTTP method used in “data dosen” module have been running according to their functions.

RANCANG BANGUN SISTEM PENYIRAMAN TAMAN HOTEL OTOMATIS BERBASIS INTERNET OF THINGS (IOT) MENGGUNAKAN ESP8266 I Made Ryan Handika; I Gst A. Komang Diafari Djuni Hartawan; i Made Ary Esta Dewi Wirastuti
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

COVID-19 is a virus that attacks the respiratory system, has a negative impact on health. The impact of the pandemic is the reduced number of tourists visiting the island of Bali, making sources of income very limited. This directly has a detrimental impact on hotel managers in Bali. With the policy of reducing the number of employees, it is clearly detrimental to all parties and we can see that several hotel facilities have been damaged, one of which is in the garden. In this final project, a garden watering system based on the Internet of Things was designed using ESP8266. This system works according to a programmed watering schedule, rain sensor readings, and soil moisture sensors. The tool will water the garden when the time conditions are met, the rain sensor detects the absence of rain around the park and also when the relay is active, it flows voltage to the solenoid valve to open the water flow to the Sprinkler. Then the watering data will be sent to the Thingspeak cloud which will also be accessible by applications on smartphones. Monitoring information will be displayed on the LCD and also the application on the smartphone. An IoT-based automatic hotel garden watering system prototype using ESP8266 is able to run according to design.

UNJUK KERJA SISTEM OFDM DENGAN MENGGUNAKAN ALGORITMA VFFT PADA KANAL AWGN N.K.W. Trisnawati; N.M.A.E.D. Wirastuti; I.G.A.K.D.D. Hartawan
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The computational load and implementation costs of a system are affected by its complexity. The Fast Fourier Transform(FFT).algorithm use in an OFDM system necessitates intensive calculations, which affects the computational load and system complexity. There is a Very Fast Fourier Transform(VFFT) algorithm which has lower complexity than the FFT, and can replace FFT with Floating-Point accuracy. The aim of this study is to determine the performance of the OFDM system by using the FFT and VFFT algorithms over the AWGN channel, based on parameter value of BER vs. Eb/No. According to the simulation results, show that the OFDM (FFT) system has a better BER value, where when Eb/No reaches 6 dB the BER value is less than 10-2, while the OFDM(VFFT) system with a BER value is 10-2, but still has almost the same trend. This is because there is non uniform row gain in the OFDM(VFFT) system. However, with this weakness, OFDM(VFFT) can minimize the complexity of the OFDM system.

PENGARUH VARIASI JUMLAH SUDU TERHADAP EFISIENSI PADA PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) DENGAN MENGGUNAKAN TURBIN VORTEX Kadek Rekha Agustha; Lie Jasa; I Made Suartika
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Micro-hydro power plants using vortex turbines have the advantage that their operation can be carried out at low levels of falling water or head. One of the problems that exist in vortex turbine is there is no equation to determine the maximum output generated by the number of blades used. Based on the problems described, a prototype of micro-hydro power plants using vortex was made to test the variations in the number of blades to get the best efficiency. The prototype test in this study used a turbine with various number of blades of 3, 5, and 9 blades. Based on the research conducted, the increase of micro-hydro power plant prototype performance equals to number of blades used. When the system was set with a discharge of 4.5 liters per second paired with a turbine consisted of 9 blades which produced 303.8 rpm of turbine rotation before coupled by the generator and 230.5 rpm after coupled by the generator, the generator rotation was 653.5 rpm, the generator output voltage was 8.29 Volts, generator current output was 0.046, generator power output was 0.387 Watt, torque was 0.0393 Nm, and the highest efficiency was 2.92%

RANCANG BANGUN PROTOTIPE MONITORING PENGAIRAN SAWAH BERBASIS LORA RA-02 SX1278 Z Zamani Noor; I G A Anom Semara Putra; KO Saputra; NMAE Dewi Wirastuti
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Rice field irrigation is still done manually by farmers in opening and closing waterways, so it takes farmers time to manage waterways. In this study, a system was created with two types of devices, namely the sender and the receiver. The sending device consists of ArduinoUNO, Soil Moisture Sensor, Water Level Float Switch, and LoRa Ra-02 SX1278. Then, the receiver consists of NodeMCU ESP8266, LoRa Ra-02 SX1278, Relay, Water Pump. After testing, the system can send notifications to the user when the rice fields are dry or the rice fields are full, the pump can automatically turn on and turn off and the user also can turn the pump on or off via Telegram Bot. User can also command the device to operate automatically via Telegram Bot.

ANALISIS DAYA OUTPUT GENERATOR BERDASARKAN VARIASI DEBIT AIR PADA PROTOTYPE PLTMH DENGAN TURBIN VORTEX I Gusti Ngurah Agastya Citranath; Lie Jasa; I Made Suartika
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Vortex turbine is a reaction water turbine that can utilize energy from low headed waterway. The power output of generator on microhydro power plant will differ depend on the input parameters used, such as water flow rates. Hence, this research goal is to find out the power output of generator from various water flow rates with an artificial waterway on a vortex turbine within the microhydro power plant prototype. This research consist a free variable of water flow rates of 2,5 l/s, 3,5 l/s, and 4,5 l/s using 9 blades turbine and paralel load lamps. From the experiment, raises of water flow rate is proportional to the increase of generator’s power output. The power output generated by each water flow rates used are 0,085 W at 2,5 l/s water flow rate, 0,256 at 3,5 l/s, and 0,387 at 4,5 l/s. Based on the experiment, it can be concluded that the increase of input water flow rate is equal to the increase of the power output generated by the generator. It is caused by the rotation of the turbine will be adjusted by the water flow rate used.

REVIEW RAGAM JENIS KAPAL PERIKANAN INDONESIA Bradley Axelius; I N. S. Kumara; W G. Ariastina
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Indonesia as a maritime country with 2.23 million people working in the marine sector, one of which is a fisherman. Fishermen are one part of the fishing unit that plays a very important role for the success of a fishing operation. This paper reviews the fleet of vessels used by fishermen in Indonesia. The research method is a literature study taken from books, papers, the internet, and other sources that can support. The results of the review show that in carrying out fishing activities, fishermen in Indonesia use traditional and modern boats or boats. Types of boats or ships are divided into several categories. Depending on the type of fishing gear such as purse seine, trawls, dredge net, lift net, gill net, pole and line, long line, tonda ship, jungkung, and based on the propulsion system and ship size divided into powered boat and non-powered boat. In the operation of the ship, electricity is supplied by generators or batteries or batteries. To drive the sailing ship, a motorized engine is used, which is divided into inboard and outboard engines based on the layout, and is categorized into marine diesel engines and marineized engines based on their design and designation. On the other hand, to optimize the production of potential fisheries resources owned by Indonesia, it is necessary to increase the number of ships. The fluctuating growth in the number of vessels from 2002 to 2016, with the largest number of vessels amounting to 815,544 units in 2014 has not been able to maximize production from this potential. The Indonesian shipbuilding industry has also not developed in line with the challenges it faces. Development is still lagging behind the capacity, potential, demands and demands of the market. As well as social organizations also have an important role to increase capture fisheries production by providing guidanceThe information presented is expected to help the interests of the community such as the central government, local governments, researchers, students, and anyone who is interested in supporting the field of fishing vessels in Indonesia, especially the application of solar power plants on fishing boats.

PENGARUH PERUBAHAN JUMLAH SUDU TURBIN TURGO TERHADAP DAYA OUTPUT PADA PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) Ida Bagus Made Pandwa Putra; I Wayan Arta Wijaya; I Gusti Ngurah Janardana
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The increase in demand for electrical energy in Indonesia causes a reduction in conventional fuel reserves. This situation forces people to look for alternative energy sources or commonly callednew and renewable energy (RE). Seeing the geographical condition of the environment in Indonesiawhich has the potential for the development of electrical energy by utilizing the flow of water, it iscalled a Micro Hydro Power Plant (PLTMH). In implementing MHP, one type of impulse turbine canbe used, namely the Turgo turbine. This study focused on knowing the effect of variations in thenumber of blades on a turgo turbine on rotational speed, torque, voltage, current and power producedby PLTMH using a Turgo turbine, with variations in the number of blades used, namely 18,16,14,9,8,and 7 blades. The method used in this research is quantitative experimental, all combinations ofparameters tested get the result that the highest output characteristic value occurs using a runnerwith a number of 18 blades, where the voltage, current, and output power are 8.30 Volts, 0, 88Ampere, and 7.27 Watt. The fastest turbine rotation results are 782.8 rpm before being connected toa generator and 565.4 rpm after being connected to a generator, while the generator rotation resultsare 1062.4 rpm. The highest torque produced is 0.1Nm, the maximum efficiency obtained at therunner blade variation is 18 blades, which is 1.1%.

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Nyoman Gunantara

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+6281558140279

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Editorial Address
Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315

Location
Kota denpasar,

Bali

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Nyoman Gunantara

Contact Email gunantara@unud.ac.id

Phone +6281558140279

Journal Mail Official gunantara@unud.ac.id

Editorial Address Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315

Location Kota denpasar, Bali INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Nyoman Gunantara

Contact Email
gunantara@unud.ac.id

Phone
+6281558140279

Journal Mail Official
gunantara@unud.ac.id

Editorial Address
Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315

Location
Kota denpasar,

Bali

INDONESIA