Article Per Year (5 Year)
p-Index From 2020 - 2025
0.659
P-Index
This Author published in this journals
All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Ilmu Pertanian Indonesia Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika Jurnal Teknologi Dirgantara Indonesian Journal of Aerospace
Wahyudi Hasbi
Unknown Affiliation
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Mechanical Engineering Physics

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
Analisis misi dan rancangan lapan-IPB satellite (LISAT) untuk pemantauan kemandirian pangan Mahmud Arifin Raimadoya; Bambang Hendro Trisasongko; Alinda Zain; Wahyudi Hasbi; Andi Tahir
Jurnal Ilmu Pertanian Indonesia Vol. 16 No. 3 (2011): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1373.656 KB)

Abstract

LAPAN-IPB micro satellite (LISAT) is the first EBA (Experimental Based Application) planned to be launched in 2013. The technical schedule implementation includes Phase-1 (2010), Phase-2 (2011), Phase-3 (2012), and Launching/Phase-4 (2013). This research was targeted at the Phase-1 (MAD: Mission Analysis and Design), with priority on space segment and user segment. Goal of this research were three critical elements: (1) initial document of MRD (Mission Requirements Definition) as a reference for next LISAT phase (policy), (2) electronic Basic Ricefield Map (e-BARIM) at the test site in Subang regency, West Java (user segment), and (3) test flight of 3-channel optical sensor (LISAT-EM3) at the test site (space segment). The study was scheduled for gadu season rice crop of 2010, and most of the work completed, except for flight test that were experiencing delay for several times. Flight was re-scheduled from early July to September, but eventually conducted in early November. This was due to the complexity of coordination of many agencies involved: LAPAN I Pustekelegan (administration), TNI headquarters (security clearance), Theta System, Germany (line-CCD), IPB (area-CCD) and Deraya Air (charter aircraft).
Aplikasi Transformasi 3 Dimensi sebagai Media Pengajaran (Studi Kasus Mata Kuliah Grafika Komputer) Wahyudi Hasbi; Suryadi Suryadi
KOMPUTASI Vol 4, No 7 (2007): Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika
Publisher : Ilmu Komputer, FMIPA, Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (554.153 KB) | DOI: 10.33751/komputasi.v4i7.1417

Abstract

Grafika komputer pada dasarnya merupakan suatu bidang ilmu komputer yang mempelajari tentang cara-cara untuk meningkatkan dan memudahkan komunikasi antara manusia dengan mesin komputer dengan jalan  membangkitkan, menyimpan dan memanipulasi gambar model suatu objek.  Dalam hal pengajaran grafika komputer sebagai mata kuliah, maka perlu  adanya pembuatan visualisasi dalam bentuk aplikasi untuk memudahkan pemahaman terhadap teori yang ada dalam grafika komputer. Salah satu contohnya adalah pembuatan aplikasi transformasi 3 dimensi dalam grafika komputer dengan menggunakan bahasa pemrograman visual yang telah ada, seperti OpenGL (Open Graphics Library) dengan Microsoft Visual C++, Microsoft Visual Basic, Delphi dan bahasa pemrograman lainnya yang  mendukung dalam pembuatan aplikasi grafis lainnya. Kata kunci : Grafika Komputer, Transformasi, Ttranslasi, Rotasi, Skala
KENDALI SAKELAR EMPAT ANTENNA BERSUSUN UNTUK PENJEJAKAN INTERFERENCE FREKUENSI TTC SATELIT LAPAN (SWITCH CONTROL SYSTEM FOR FOUR ARRAY ANTENNA FOR TRACKING OF LAPAN’S SATELLITE TTC INTERFERENCE FREQUENCY) Arif Hidayat; Wahyudi Hasbi; Elyas Palantei; Syafruddin Syarif
Jurnal Teknologi Dirgantara Vol. 15 No. 1 Juni 2017
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2017.v15.a2631

Abstract

Telemetry Tracking and Command (TTC) of LAPAN’s satellite use UHF frequency. This frequency is susceptible to interference by an amateur radio transmitter. One method to look for an interference transmitter is Doppler Effect. To get the optimal value of the Doppler shift frequency, it is necessary to have stabilized antenna switch as controller of antenna array. The RF switches controlled by an Arduino board produced 500 Hz Doppler frequency. Other hardwares are Demodulator, clock Arduino Board, and Universal Serial Bus  (USB) soundcard as the input for the searching software. The results can be shown using the open access sound Doppler. The system has been able to detect UHF transmitters and repeaters received by the device. For upgrade, the data processing system can be done using Matlab software to easier process and analysis. AbstrakTelemetry Tracking And Command (TTC) satelit LAPAN menggunakan frekuensi UHF. Frekuensi UHF rentan terhadap interference. Salah satu metode mencari pemancar interference menggunakan metode efek Doppler. Untuk mendapat nilai pergeseran frekuensi sesuai efek Doppler yang dibutuhkan, diperlukan sakelar antena yang stabil, yang berfungsi sebagai pengontrol antena array. Rangkaian sakelar RF di kontrol dengan Arduino board menghasilkan Doppler frekuensi 500 Hz. Demodulator, clock Arduino Board dan Soundcard sebagai input software pencari.  Hasil outputnya dapat dilihat dengan menggunakan software open akses sounDoppler. Sistem ini mampu mendeteksi pemancar maupun repeater yang diterima oleh perangkat. Upgrade sistem dari penelitian ini adalah proses pengolahan data dapat dilakukan secara mandiri menggunakan software Matlab sehingga lebih mudah untuk diolah dan dianalisis.
A Review of Absolute Radiometry Calibration Method for Satellite Multispectral Camera while in Orbit Sartika Salaswati; Saputro, Adhi Harmoko; Hasbi, Wahyudi
Indonesian Journal of Aerospace Vol. 22 No. 2 (2024): Indonesian Journal Of Aerospace
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/ijoa.2024.3090

Abstract

Multispectral cameras on satellites are a type of camera that is widely used in satellite remote sensing and has wide applications. Therefore, it is necessary to carry out absolute radiometric calibration to maintain the accuracy of radiometric information in satellite camera images. There are several types of absolute radiometric calibration, including onboard, Rayleigh, vicarious, and cross-calibration. These methods have strengths and weaknesses. Therefore, it is necessary to conduct a literature review to find out which calibration method is appropriate for certain conditions. Based on a literature review, all methods can be used and adapted to the conditions of the satellite. The onboard calibration method is suitable for satellites equipped with calibration instruments. The Rayleigh calibration method is suitable for large FOV cameras with visual wavelengths. The vicarious calibration method is suitable for satellites from countries close to standardized calibration sites. Meanwhile, the cross-calibration method is suitable for satellites cameras that have specifications and conditions close to the reference camera. Therefore, these calibration methods can be carried out together to complement each method.
INFORMATION EXTRACTION FROM LAPAN SATELLITE AIS DATABASE FOR SHIP CLASSIFICATION IN THE INDONESIAN TERRITORIAL WATERS Nugroho, Muazam; Ferdiansyah, Nurrochman; Rahayu, Dicka Ariptian; Permala, Rizki; Hakim, Patria Rachman; Hasbi, Wahyudi
Indonesian Journal of Aerospace Vol. 19 No. 1 (2021)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2021.v19.a3566

Abstract

Automatic Identification System (AIS) is a system used to monitor ship activity by sending ship information via Very High Frequency (VHF) waves. Information sent by ships around the world is recorded by AIS receivers carried by the LAPAN-A2 and LAPAN-A3 satellites along their orbital trajectories. The AIS data recorded by the satellite will then be acquired and stored at the LAPAN earth station. This study focuses on extracting information from the LAPAN satellite AIS database to obtain information on the number of vessels based on a unique Maritime Mobile Service Identity (MMSI) grouped according to the type of vessel entering Indonesian waters with coordinates 95BT / 141BT, -11LS / 6LU every month. in the period January to December 2019. The results of extracting the information are in the form of the number of ships based on unique MMSI which are grouped according to the type of ship in the territory of Indonesia with that region and time period
IN-ORBIT IMPLEMENTATION OF ERROR PATCHING METHODS FOR LAPAN-A3/IPB OBDH FIRMWARE SYSTEM Taufik, Muhammad; Hasbi, Wahyudi; Karim, Abdul
Indonesian Journal of Aerospace Vol. 17 No. 1 Juni (2019): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2019.v17.a3012

Abstract

OBDH (On-board data handling) is a satellite subsystem that receives, processes, decides and executes commands from and to satellites. OBDH is built on two systems namely hardware and software integrated system (firmware system). In terms of hardware, OBDH uses a processor with 32bit RISC architecture, 128/256 Kbyte internal memory and a firmware system that is built using primitive programming. This programming uses the super loop architecture program and interrupt to manage the system to function properly. Problems occur when an error occurs in one of the functions in the interrupt routine resulting in failure of interpretation of commands or data from satellite sensors. This paper describes the implementation of the error patching methods on the LAPAN-A3/IPB Satellite OBDH firmware system in order to keep the system working well. Initial verification through testing on the ground have been successfully performed using engineering model of OBDH and hardware in the loop simulators (HWIL) module. Based on the test results, implementation on satellite has also been successfully done.
ANALISIS PENGGUNAAN DATA KAMERA VIDEO UNTUK MENINGKATKAN KUALITAS KOREKSI GEOMETRI PADA CITRA IMAGER PUSHBROOM (ANALYSIS OF VIDEO CAMERA DATA USAGE TO IMPROVE GEOMETRY CORRECTION QUALITY ON PUSHBROOM IMAGER IMAGE) Hakim, Patria Rachman; Syafrudin, A. Hadi; Hasbi, Wahyudi; Rahman, Abdul
Indonesian Journal of Aerospace Vol. 12 No. 1 Juni (2014): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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

Abstract

Citra yang dihasilkan imager pushbroom pada umumnya memiliki distorsi geometri yang cukup signifikan yang diakibatkan oleh ketidakstabilan attitude satelit pembawanya. Untuk dapat menghasilkan citra terkoreksi yang baik untuk berbagai kondisi pengamatan maka dibutuhkan data attitude satelit dengan frekuensi yang cukup tinggi. Penelitian ini menganalisis penggunaan kamera video untuk menghasilkan data attitude dengan frekuensi tinggi yang akan digunakan dalam koreksi geometri sistematik. Pada dasarnya, data attitude satelit dapat dihasilkan dari data video dengan menggunakan konsep geometri epipolar. Beberapa perangkat lunak pelacak video telah tersedia untuk mengekstrak data attitude dari data video, dimana frekuensi data attitude yang dihasilkan akan sama dengan frame rate kamera video yang digunakan, yang umumnya bernilai 20-30 Hz. Data attitude ini kemudian diintegrasikan dengan data attitude yang berasal dari star sensor dan selanjutnya digunakan dalam algoritma koreksi geometri sistematik citra. Hasil simulasi menunjukkan bahwa pada pergerakan yang tidak stabil, data attitude video dapat meningkatkan kualitas citra terkoreksi secara signifikan; sedangkan untuk pergerakan stabil sebaiknya hanya menggunakan data attitude dari star sensor. Selain itu, untuk dapat menghasilkan data estimasi attitude yang baik maka disarankan menggunakan kamera video dengan resolusi tinggi dan lebar field of view (FoV) yang luas.Kata kunci: Koreksi geometri sistematik, Imager pushbroom, Kamera video, Epipolar.
ANALISIS DAN PENGUJIAN SISTEM BATERAI SATELIT LAPAN-A2/ORARI (ANALYSIS AND TEST OF LAPAN A2/ORARI SATELLITE BATTERY SYSTEM) Karim, Abdul Karim; Hasbi, Wahyudi
Indonesian Journal of Aerospace Vol. 11 No. 2 Desember (2013): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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

Abstract

Penyimpanan daya listrik dalam baterai sangat diperlukan sistem satelit sebagai pasokan daya satelit pada saat orbitnya tidak mengalami cahaya matahari (eclipse). Untuk memenuhi kebutuhan tersebut sistem LAPAN-A2/ORARI dilengkapi oleh 3 buah paket baterai dengan spesifikasi total daya 18,3 Ah pada tegangan nominal 15 Volt. Dalam makalah ini akan dijelaskan analisis hasil pengujian baterai dengan cara charging dan discharging. Data daya listrik setiap baterai akan direkam menggunakan perangkat lunak dan kemudian akan dilakukan analisis data. Hasil analisis menunjukan total kapasitas baterai satelit LAPAN-A2/ORARI adalah 18,287 Ah/ 307,221 Wh dan nilai operasional adalah 18,078 Ah/303,710 Wh pada tegangan 16,8 Volt.
Numerical and experimental state of identification battery pack lithium-ion Anggraeni, Dewi; Sudiarto, Budi; Nasser, Eriko Nasemudin; Hasbi, Wahyudi; Natali, Yus; Priambodo, Purnomo Sidi
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 4: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i4.pp2623-2633

Abstract

Two key indicators of a battery management system (BMS) are the state of charge (SoC) and the state of health (SoH). Accurately estimating SoC is important to prevent potential issues. Additionally, space, computing time, and cost are important factors in hardware development. To address these considerations, the first-order extended Kalman filter (EKF) and adaptive extended Kalman filter (AEKF) models were selected due to their simpler data pre-processing and better accuracy. The study recommends using the first-order equivalent circuit model (ECM) method in conjunction with the EKF and AEKF algorithms due to their straightforward setup and efficient computational process. Analysis of the charge-discharge cycles shows that the AEKF method consistently outperformed the EKF method regarding SoC accuracy. Moreover, when given different initial SoC values, the AEKF method displayed superior SoC estimation accuracy compared to the EKF method. Moreover, while the accuracy of the EKF is diminished, the error value remains below 2.5% for up to 500 cycles. Additionally, the shorter computing time of the EKF method is a consideration for practical real-world implementation. Furthermore, experiments conducted over 500 cycles revealed that SoH estimation declined from 99.97% to 76.1947%, suggesting that the battery has reached the end of life (EOL) stage.
Co-Authors Abdul Karim Abdul Rahman Adhi Harmoko Saputro Alinda F. M. Zain Andi Tahir Arif Hidayat Bambang Hendro Trisasongko Budi Sudiarto Dewi ANGGRAENI Elyas Palantei Ferdiansyah, Nurrochman Hakim, Patria Rachman Karim, Abdul Karim Mahmud Arifin Raimadoya Muazam Nugroho MUHAMMAD TAUFIK Nasser, Eriko Nasemudin Permala, Rizki Purnomo Sidi Priambodo Rahayu, Dicka Ariptian Sartika Salaswati Suryadi Suryadi Syafruddin Syarif Syafrudin, A. Hadi Yus Natali