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Journal of Electrical Technology UMY
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 25501186     EISSN : 25806823     DOI : 10.18196/jet
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Library & Information Science
The Journal of Electrical Technology UMY (JET-UMY) is a peer-reviewed journal that publishes original theoretical and applied papers on all aspects of Electrical, Electronics, and Computer Engineering.
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Articles 6 Documents
 1 
Search results for , issue "Vol 7, No 2 (2023): December" : 6 Documents clear
LTE Advanced Network Performance Analysis for Smartfren and Telkomsel in the City of Yogyakarta Widyasmoro Widyasmoro
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.18762

Abstract

This study investigates comprehensive assessment of LTE-Advanced network performance in urban environment of Sudirman Road and Malioboro Road, Yogyakarta, Indonesia. This study aims to measure and assess the performance or quality of the LTE-Advanced network based on the Quality of Service (QoS) and Signal Strength parameters using the drive test measurements data collection method. This study analyses signal strength parameters (RSRP and RSRQ) and quality of service metrics (delay and jitter) across two prominent operators, Smartfren and Telkomsel. Our investigation unveils robust signal strength from both operators at Sudirman Road, with Smartfren demonstrating notable superiority in RSRQ. Similarly, at the Malioboro Road, both operators exhibit commendable RSRP, with Smartfren maintaining a marginal advantage. In terms of quality of service, our findings affirm that both Smartfren and Telkomsel consistently deliver low latency and maintain satisfactory jitter levels, ensuring uninterrupted connectivity experiences for users. While Telkomsel typically leads in delay performance, Smartfren showcases superior jitter performance at specific points at Sudirman Road. Conversely, at Malioboro Road, Telkomsel outperforms Smartfren in both delay and jitter metrics. These insights offer invaluable guidance for network optimization strategies, empowering operators to enhance service quality and enrich connectivity for the users in Yogyakarta. Furthermore, our study contributes to the broader understanding of LTE-Advanced network performance, emphasizing the significance of signal strength and quality of service parameters in ensuring optimal user experiences in urban environments.
IoT Smart Control System: Smoke and Fire Detection Using SIM900A Module Rahmat Fauzi Siregar; Affandi Affandi; Rohana Rohana; Arya Rudi Nasution; Iqbal Tanjung
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.19908

Abstract

The main focus of this system is to detect smoke and fire effectively in potential hazard situations. This system utilizes sensor technology to monitor changes in environmental conditions, with the aim of providing quick responses and notifications to users or relevant authorities via a cellular connection. This approach combines feedback signals from sensors and cellular connectivity using the SIM900A module processed with a microcontroller to increase the efficiency and reliability of hazard detection. This system was designed with the aim of providing an efficient and affordable solution for detecting potential fires or other hazardous situations in various environments, including homes, offices and industrial areas. Trial results show that this system is capable of detecting smoke and fire with high accuracy, as well as providing instant notifications via text messages or digital notifications. This innovation is expected to make a positive contribution in improving safety and security in various sectors, while leveraging the potential of IoT connectivity to provide smarter solutions in hazard detection.
Design of Automatic Transfer Switch System Solar Power Plant – PLN
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.14651

Abstract

The utilization of solar power for generating energy is increasing in scale. The Solar Power Plant (SPP) operating system comprises On Grid, Off Grid, and Hybrid systems. To successfully execute a power supply transfer operation, it is important to do thorough study. The transfer process is automated by the utilization of voltage sensors. The voltage sensing is derived from the output of both the SPP system and the PLN (Indonesian State Electricity Company) system. This study involved conducting prime SPP (Self-Paced Reading) and prime PLN (Picture Naming) tasks. The stress analysis technique is conducted during transfer in both primes. When converting SPP to PLN and transferring from PLN to SPP, voltage measurements are conducted if the SPP is in its prime state. When the power line network (PLN) is in its optimal state, voltage measurements are conducted during the transition from PLN to the solar power plant (SPP) and vice versa. When the SPP is in its prime state, the average voltage during the transfer from SPP to PLN is at 217.8 V, as indicated by the measurement findings. The average voltage for transferring power from the power grid (PLN) to the power plant (SPP) is at 225.4 V. During the peak power load period, the average voltage transferred from the power grid (PLN) to the power plant (SPP) is at 220.18 V, whereas the average value when moving from SPP to PLN is at 220.12 V. At the prime PLN, there is a minor voltage variance due to the higher stability of the PLN voltage.
Designing Device of Touchless Smart Lift using Voice Commands with Method of Speech Recognition based on the Internet of Things to Prevent the Spread of COVID-19
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.21108

Abstract

In Indonesia, the number of sufferers who were confirmed positive for COVID-19 as of May 14, 2021 approximately 1,734,285 people. One of the causes of the spread of COVID-19 is indicated by passengers touching the lift push button panels. Based on these problems, a device of touchless Smart Lift was designed using voice commands with the method of speech recognition. This voice command controls hardware using the human voice. Voice commands are part of speech recognition methods. The speech recognition method is very suitable to be applied to controlling a lift, so that lift users can access the intended floor via a smart speaker. From testing the performance of the smart lift, the results obtained were that the infrared temperature sensor distance 5 cm with a temperature of 36.65oC. The fastest response time testing 2.14 seconds. Sensor weight testing 195.5 Kg. Testing the accuracy of voice commands for the first and second floors obtained the best results of 100% and for the third floor 95%. From the results of this research, it is hoped that the smart lift device will be able to reduce the spread of COVID-19 without touching the lift push button panel.
Implementation of a PI-Controlled Closed-Loop System for Mecanum Wheel Coordination in an Omni-Directional Robot
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.22263

Abstract

The MR CRUSH robot is designed for participation in the 2023 Indonesian Thematic Robot Contest (KRTMI). In the motor part of the MR CRUSH robot, each wheel is designed to rotate independently and using a mecanum wheel system. Mecanum wheels are a type of wheel that has the ability to move in all directions by combining rotational speed and direction. To maximize this capability, the force generated on each mecanum wheel must be the same as set point. One of the influences of the amount of force produced is the mecanum wheel rotation speed. This research aims to implement a closed-loop control system with a Proportional-Integral (PI) controller. By implementing this PI controller, it ensures that the rotation speed of the dc motor corresponds to the set point value given, so that the four dc motors that drive the mecanum wheel will have the same rotation speed. The parameters for the PI controller used in this research are Kp = 0.3 and Ki = 0.08. Based on the results, the closed-loop control system with the designed PI controller produces constant motor rotation speed at the set point with 0 steady-state error.
The Design of Security Framework for LoRaWAN FUOTA
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.22360

Abstract

This research outlines a comprehensive security framework for LoRaWAN Firmware Updates Over-The-Air (FUOTA), which is essential for ensuring the reliability of IoT devices in critical infrastructures. It addresses multiple security threats specific to the wireless transmission of firmware updates, initiating an assessment of the vulnerabilities faced by the LoRaWAN FUOTA process. The framework incorporates several security measures, including secure transmission using lightweight encryption to maintain data confidentiality, robust authentication and authorization strategies to prevent unauthorized access, and digital signatures for integrity verification to ensure only authentic firmware updates are installed. It also includes anti-replay measures like sequence numbers and timestamps to protect against replay attacks and emphasizes efficient resource management to optimize power and computational resources for IoT devices. Additionally, secure multicast management techniques are employed to handle the challenges of simultaneously distributing updates to multiple devices. The framework provides an integrated and detailed approach to enhancing the security and operational efficiency of LoRaWAN FUOTA, making it an invaluable resource for practitioners and researchers in the field.

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