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KOMPARASI PERFORMA JARINGAN ANTARA PENYEDIA LAYANAN SELULER 4G LTE DI AREA KOTA YOGYAKARTA Ari Sugiharto; Ikrima Alfi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 1 (2019): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (645.636 KB) | DOI: 10.28989/angkasa.v11i1.397

Abstract

Teknologi telekomunikasi seluler telah berkembang ke generasi keempat, yaitu jaringan 4G. Meskipun hampir semua operator penyedia layanan telekomunikasi seluler telah menyatakan bahwa mereka siap dengan jaringan 4G, pada kenyataannya, tidak semua area di kota Yogyakarta tercakup oleh layanan jaringan 4G. Kondisi ini dikeluhkan oleh banyak pengguna. Kinerja jaringan 4G di wilayah Yogyakarta perlu ditelusuri lebih lanjut sehingga pemanfaatannya lebih optimal dan tidak mengecewakan pengguna jaringan. Penelitian ini menganalisis kinerja jaringan 4G LTE dari berbagai operator layanan telepon seluler di wilayah Kota Yogyakarta, diwakili oleh dua operator. Parameter kinerja yang diukur adalah Daya Sinyal Referensi yang Diterima (RSRP) dan Kualitas Referensi Sinyal yang Diterima (RSRQ). Dalam studi ini tes drive dilakukan untuk menentukan kualitas sinyal seluler di berbagai daerah yang mewakili daerah perkotaan, suburban dan perkotaan padat di kota Yogyakarta. Dari hasil pengukuran tes drive, kesimpulan dari hasil tes untuk operator A, RSRP nilai maks -57dBm, RSRP min -117 dBm, RSRP rata-rata -85.35dBm, RSRQ max -4 dBm, RSRQ min -23 dBm, dan RSRQ rata-rata -13,02 dBm. Sedangkan untuk operator B diperoleh nilai maks RSRP -51 dBm, RSRP min -105 dBm, RSRP rata-rata 76,92 dBm, RSRQ max -4 dBm, RSRQ min -21 dBm, dan RSRQ rata-rata -8,94 dBm.
Teknologi Augmented Reality untuk instalasi kelistrikan gedung Ari Sugiharto; Ikrima Alfi; Suwirno Suwirno
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 14, No 2 (2022): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v14i2.1220

Abstract

The electrical installation stage in the process of building construction have risks to work safety and the operation of the results if the work is not following the General Electrical Installation Requirements (PUIL). This study aims to apply the development of Augmented Reality (AR) technology to provide convenience in the process of working on the electrical installation. Development of AR-based applications by utilizing android-based mobile phone devices which are now commonly owned by the public. The research was conducted by analyzing the electrical installation system in accordance with PUIL standards and its application in an easy-to-understand format, then processing electrical component data as input for 3D objects. Furthermore, the technical data of the building is used to produce AR applications that can be applied to the location of electrical installation work. The application that was built was successfully implemented on an Android-based cellular phone device. The rear camera is used to detect markers as triggers for the emergence of 3D objects in the form of electrical networks and electrical installation components. There are also info features and 3D object animations, as well as video calls as an alternative option for assistance if there are problems during electrical installation work.
Visual Studio Application for Generation Power System Reliability Calculations Ikrima Alfi; Rifqi Fauzan Kusmayana
Buletin Ilmiah Sarjana Teknik Elektro Vol. 5 No. 1 (2023): March
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v5i1.7076

Abstract

Power system reliability is affected by the reliability of its sub-systems, including generator reliability. The reliability of a power plant can be seen, among others, based on the LOLE (Loss of Load Expectation) index. Processing and calculating data using excel or matlab will take a lot of time and effort.  This is unfavorable for system evaluation which is a routine activity. The contribution of this research is to create an easy data processing method with a user-friendly display using Java programming-based Visual Studio. The research data uses generator operating data in 2018 and 2019 Hydroelectric Power Plant Ir. H. Djuanda. Calculations using visual studio have been validated with calculations using Excel. LOLE calculation results in 2018 was 0.17356748092842464 days/year and for 2019 it produced a LOLE of 0.006204969593183424 days/year. The results obtained did not exceed the PLN standard, namely 1 days/year, in other words, in 2018 and 2019 Hydroelectric Power Plant Ir. H. Djuanda has a good level of reliability.
Predicting Wind Turbine Scheduling Maintenance Using Artificial Neural Network for Preventing Blade Breakage: Case Study Baron Techno-Park Fredi Prima Sakti; Haidar Rahman; Ikrima Alfi; Ridwan Budi Prasetyo
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 3 No 1 (2021): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.559 KB) | DOI: 10.46923/ijets.v3i1.115

Abstract

One of the main issue that Baron Techno-Park (hybrid power plant) is facing are the practices of finding a suitable maintenance strategy. Operation and maintenance (O&M) of wind turbines are heavily affected by weather condition, particularly wind conditions. Blade failures, such as blade breakages, can lead to catastrophic consequences. The causes of blade breakages in Baron Techno-Park is due to unpredictable high wind speed from different directions. A technique that this research propose to implement a maintenance strategy in order to create an efficient O&M and also prevent the breakage of the wind turbine blades, is by using the Artificial Neural Network (ANN). ANN performance is satisfactory with the wind speed error of 30.25 % and wind direction error of 13.74 %. Also, R2 has a highest prediction of 0.998. Analyzing the survival wind speed of 60 m/s which is specify in the wind turbine specification. Analyzing the prediction results. It is safe to say that during the month of July 2021, it is not necessary for a maintenance schedule.
Rancang Bangun Alat Penyemprotan Pestisida Organik Dalam Perkebunan Cabai Menggunakan Tenaga Surya Rifqi Ahmad Afandi; Sandy Ikhwanul Attar; Anivan Aditia; MS Hendriyawan Achmad; Ikrima Alfi
Voteteknika (Vocational Teknik Elektronika dan Informatika) Vol 12, No 4 (2024): Vol. 12, No 4, Desember 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/voteteknika.v12i4.131140

Abstract

Perkebunan cabai di Indonesia berkontribusi signifikan pada sektor hortikultura, tetapi sering menghadapi tantangan penggunaan pestisida yang tidak efisien, yang berdampak negatif terhadap lingkungan. Penggunaan pestisida yang tidak terkontrol dapat menimbulkan dampak buruk terhadap lingkungan. Oleh karena itu, penelitian ini berfokus pada pengembangan sistem penyemprotan pestisida otomatis berbasis tenaga surya dan Internet of Things (IoT). Sistem ini menggunakan panel surya sebagai sumber energi utama, sensor ultrasonik untuk deteksi cairan, dan mikrokontroler WeMos D1 R1 yang dikendalikan melalui protokol MQTT untuk monitoring jarak jauh. Hasil pengujian menunjukkan bahwa sistem penyemprotan pestisida otomatis beroperasi secara efisien dalam kondisi cuaca yang mendukung. Rata-rata tegangan, arus, dan daya yang dihasilkan panel surya selama tujuh hari percobaan masing-masing mencapai 13 Volt, 0,289 Ampere, dan 3,96 Watt. Fluktuasi output terjadi akibat variasi kondisi cuaca di Yogyakarta, seperti cerah, mendung, dan hujan, dengan output tertinggi tercatat pada hari ketujuh. Selain itu, akurasi sensor ultrasonik HY-SR04 dan ketepatan respon sensor mencapai tingkat keakuratan 100%, menunjukkan kinerja optimal alat sesuai desain. Sistem ini menawarkan solusi berkelanjutan bagi petani dengan efisiensi yang tinggi, meskipun masih memerlukan pengembangan energi cadangan untuk mengurangi ketergantungan pada cahaya matahari.Kata kunci : Penyemprotan Pestisida, Otomatisasi, Tenaga Surya, Internet of Things, Pertanian.Chili plantations in Indonesia contribute significantly to the horticultural sector but often face challenges in inefficient pesticide use, which negatively impacts the environment. Uncontrolled pesticide application can cause serious environmental harm. Therefore, this study focuses on developing an automatic pesticide spraying system powered by solar energy and integrated with the Internet of Things (IoT). The system utilizes solar panels as the primary energy source, ultrasonic sensors for liquid detection, and a WeMos D1 R1 microcontroller controlled via the MQTT protocol for remote monitoring. The testing results indicate that the automatic pesticide spraying system operates efficiently under favorable weather conditions. Over seven days of testing, the solar panel produced an average voltage, current, and power output of 13 Volts, 0.289 Amperes, and 3.96 Watts, respectively. Output fluctuations occurred due to varying weather conditions in Yogyakarta, including sunny, cloudy, and rainy days, with the highest output recorded on the seventh day. Additionally, the ultrasonic sensor HY-SR04 demonstrated a 100% accuracy rate in liquid level detection and response precision, confirming the system's optimal performance as designed. This system offers a sustainable solution for farmers with high efficiency, although further development of backup energy sources is needed to reduce dependency on sunlight.Keywords: Pesticide Spraying, Automation, Solar Energy, Internet of Things, Agriculture