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Heri Budi Wibowo
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INDONESIA
Jurnal Teknologi Dirgantara
Published by Lembaga Penerbangan dan Antariksa Nasional
ISSN : 14128063     EISSN : 25977849     DOI : https://doi.org/10.30536
Core Subject : Science, Engineering,
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Mechanical Engineering Physics
Jurnal Teknologi Dirgantara (Journal of Aerospace Technology) is an Indonesian accredited scientific publication that covers topics of Rocket, satellite, and aeronautics technology, as well as a spin-off from aerospace technology, such as aerodynamics, astronautics, aerospace structure, power and thermal system of satellites, flight controls. Propulsion and energetic technologies, such as propellant, rocket static-test, thermodynamics of propulsion system. Launch vehicle technology and space operations, such as satellite telecommunication systems, space payloads, and ground station technologies.
Arjuna Subject : Teknik (semua kategori) - Teknik Ruang Angkasa
Articles 333 Documents
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RANCANGAN DAN IMPLEMENTASI SISTEM PENERIMA S-BAND DATA VIDEO SATELITE LAPAN-TUBSAT abdul Rahman
Jurnal Teknologi Dirgantara Vol 5, No.1 Juni (2007)
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

One of the LAPAN-TUBSAT satellite mission is video surveillance. This mission is done with transmiting real time video from satellite. For reception of this transmission in ground station it is needed to specify the specification and general design of the receiver, so that it could receive and process the signal transmission from the satellite to become real time video, Specifying of the specification of this receiver used link budget calculation, transmission type and other RF parameters. The specification and general design of this receiver was implemented as an S-BAnd Video Receiver and already tested using real time transmission from DLR-TUBSAT satellite's video and applied in LAPAN-TUBSAT data reception. Keywords: Video surveillance.
Full paper JTD Vol. 15 No. 2 Desember 2017 Redaksi Jurnal
Jurnal Teknologi Dirgantara Vol. 15 No. 2 Desember 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.a2916

Abstract

KONTROLER GAIN SCHEDULING UNTUK RUDAL UDARA KE UDARA Rika Andiarti
Jurnal Teknologi Dirgantara Vol 3, No.2 Desember (2005)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2005.v3.a813

Abstract

A control system for an air-to-air guided missile is developed. Gain scheduling control technique is used to perform the missile flight toward a moving target. The simulation results show that the gain scheduling control technique is effective to obtain the desired missile performance.
PENGUKURAN TURBULENSI DAN ANGULARITAS ALIRAN PADA TEROWONGAN ANGIN SUBSONIK LAPAN (THE MEASUREMENT OF TURBULENCE AND FLOW ANGULARITY IN LAPAN’S SUBSONIC WIND TUNNEL) firman hartono; Ronald Bessie; Agus Aribowo
Jurnal Teknologi Dirgantara Vol. 14 No. 2 Desember 2016
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2016.v14.a2481

Abstract

This paper explains the measurement of turbulence intensity and angularity in LAPAN’s Open Loop Subsonic Wind Tunnel. The objective of the research is to find out the aerodynamic characterstic of the tunnel. Turbulence intensities were measured using 200 mm and 300 mm diameter turbulence sphere. The flow angularity in the cross section of tunnel’s test section was measured using five holes probe at two different axial position i.e. 1. above internal balance turning table and 2. above external balance turning table. The number of measured points are 110 for every cross section plane and the average velocity during angular flow measurement is 15 m/s. Turbulence measurements shows wind tunnel’s turbulence intensity of 0.26% at 25.9 m/s and 0.1% at 19 m/s. Angularity measurement shows relatively large angular flow variation in the jet, i.e. pitch angle of ±3o and achieving +7o at some locations and yaw angle of ±2.5o. Abstrak:Makalah ini menjelaskan pengukuran intensitas turbulensi dan angularitas aliran pada seksi uji terowongan angin sirkuit terbuka kecepatan rendah Lembaga Penerbangan dan Antariksa Nasional. Tujuan dilakukannya pengukuran intensitas turbulensi dan angularitas adalah untuk mengetahui karakteristik aerodinamika terowongan angin kecepatan rendah LAPAN. Pengukuran intensitas turbulensi dilakukan menggunakan dua bola turbulensi (turbulence sphere) dengan diameter 200 mm dan 300 mm sedangkan pengukuran angularitas aliran dilakukan menggunakan probe 5 lubang pada bidang melintang di dua posisi aksial yaitu: di tengah roda putar internal balance dan di tengah roda putar external balance. Keseluruhan jumlah titik yang diukur per bidang adalah sebanyak 110 titik. Pengukuran dilakukan pada kecepatan rata-rata 15 m/s. Hasil pengukuran intensitas turbulensi menunjukkan bahwa intensitas turbulensi terowongan angin subsonik LAPAN pada kecepatan 25,9 m/s dan 19 m/s adalah sebesar 0,26% dan 0,1%. Hasil pengukuran angularitas aliran menunjukkan bahwa terowongan angin ini memiliki angularitas yang cukup besar yaitu sudut pitch ±3⁰ dengan beberapa titik mencapai +7⁰ dan sudut yaw ±2,5⁰.
MODEL KOREKSI GEOMETRI SISTEMATIK DATA IMAGER PUSHBROOM MENGGUNAKAN METODE PROYEKSI KOLINEAR [PUSHBROOM IMAGER DATA SYSTEMATIC GEOMETRIC CORRECTION MODEL USING COLLINEAR PROJECTION METHOD] Patria Rachman Hakim; Abdul Rahman; - Suhermanto; Elvira Rachim
Jurnal Teknologi Dirgantara Vol.10 No.2 Desember 2012
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

LAPAN-A3 satellite, which is planned to be launched on 2014, will carry a 4 channels pushbroom imager. An image pre-processing is needed to assure that there will be no distortion on the output image data, particularly a systematic distortion, whether it is geometric or radiometric. Systematic geometric correction is intended to eliminate geometric distortion which are predictable such as view angle, earth curvature, earth rotation and varrying camera orientation during observation. The colinear projection method is used in order to transform every pixel on the image into earth coordinate points. Systematic geometric correction needs satellite ancillary data such as position and camera orientation from GPS and star sensor. This research simulated dummy data as substitute to distorted image and ancillary data for designing and simulation purpose. The simulation result shows that the systematic geometric correction algorithm is able to correct the distortion occured in image. A corrected image with 1000 meter accuracy can be achieved with 0,1 degree orientation data accuracy while 0,01 degree orientation data accuracy produces an even better 100 meter accuracy corrected image for nadir observation. Key words: Systematic geometric correction, Pushbroom imager, Colinear projection, Ancillary data
Roll Amplification of Solid Rocket Motor in LAPAN Sounding Rocket Oka Sudiana
Jurnal Teknologi Dirgantara Vol. 18 No.1 Juni 2020
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2020.v18.a3351

Abstract

Sounding rockets have been used for scientific research and implemented in meteorological and upper atmosphere studies since the late 1950s. Sounding rockets are sub-orbital carriers that follow a parabolic trajectory from launch to landing. Supporting the roadmap of Satellite Launch Vehicle development, LAPAN had launch The Sounding Rocket Program. A sensitive amplification from the production of an unpredicted roll rate was detected during the boost of the sounding rocket, despite of the tail wings in cruciform configuration at last flight test. One of this phenomenon can be influenced by the flow field of the combustion chamber during boosting time. The basic idea of this research is to model the roll amplification effect as a swirling motion of portion of exhaust gas that participate to the rotation dynamics of the rocket rather than to exit immediately flow the combustion chamber. Available flight data where is obtained from last flight test presented. It is shown the presence of a significant roll amplification when solid rocket motor is used during burning time. The result has a good agreement to presence of a portion of exhaust gas influence an unpredicted roll amplification.
THE DESIGN OF G2-SAT OPERATION SCENARIO FOR DATA ACQUISITION AND TRANSMISSION Ery Fitrianingsih
Jurnal Teknologi Dirgantara Vol 6, No.2 Desember (2008)
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

Konsep misi satelit LAPAN generasi II (G2-SAT) dirancang berdasarkan muatan yang akan dibawa oleh G2-SAT yaitu sistem imager dengan empat kanal sebagai alat untuk menghasilkan citra yang dapat dimanfaatkan untuk program ketahanan pangan. Perancangan konsep ini dilakukan dengan menggabungkan hasil analisa orbit, data spesifikasi muatan yang telah diolah, akses satelit ke stasiun bumi serta dengan menerapkan batasan-batasan misi. Paper ini membahas tentang perancangan skenario operasi yang dapat diterapkan pada G2-SAT sebagai bagian dari sebuah konsep misi. Skenario operasi menjelaskan bagaimana data/citra di ambil oleh satelit dan dikirimkan dari satelit ke stasiun bumi sehingga tujuan misi yang direncanakan dapat dicapai.
IMPLEMENTASI ENCODER REED-SOLOMON PADA FPGA BERBASIS CCSDS (REED-SOLOMON ENCODER IMPLEMENTATION ON FPGA BASED ON CCSDS) Patria Rachman Hakim; Abdul Rahman; Deddy El Amin; Widya Roza; Elvira Rahim
Jurnal Teknologi Dirgantara Vol. 12 No. 2 Desember 2014
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

Salah satu fungsi sistem Payload Data Handling (PDH) pada sebuah satelit adalah melakukan channel coding untuk data citra satelit. Consultative Committee for Space Data Systems (CCSDS) telah merekomendasikan penggunaan encoder Reed-Solomon (RS) untuk keperluan channel coding tersebut. Untuk dapat merealisasikan transmisi dengan laju data yang tinggi, maka implementasi algoritma encoder RS pada sitem PDH satelit membutuhkan Field Programmable Gate Array (FPGA). Penelitian ini bertujuan untuk merancang modul encoder RS(255,223) berbasis CCSDS dan mengimplementasikan encoder tersebut pada FPGA dengan desain rangkaian yang lebih optimal dibandingkan dengan encoder RS komersial (IP-core). Berdasarkan hasil pengujian yang telah dilakukan, encoder yang dirancang memiliki beberapa kelebihan dalam hal efisiensi gerbang logika yang digunakan dan tingkat kinerja data keluaran yang dihasilkan. Selain itu, pada penelitian ini juga dikembangkan metode encoding paralel yang akan diterapkan pada sistem PDH satelit. Hasil pengujian menunjukkan bahwa dengan menggunakan metode tersebut, data keluaran yang dihasilkan encoder memiliki laju data yang lebih tinggi dan tidak membutuhkan data dummy untuk melengkapi data keluaran. Kedua hasil tersebut diharapkan dapat mendukung pengembangan sistem PDH satelit yang dilakukan di Pusat Teknologi Satelit saat ini.Kata kunci: Channel coding, Encoder Reed-Solomon, PDH, FPGA, CCSDS
MODIFIKASI PERSAMAAN QUATERNION PADA ALGORITMA INS UNTUK APLIKASI ROKET Romi Wiryadinata; Wahyu Widada
Jurnal Teknologi Dirgantara Vol 8, No.2 Desember (2010)
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

INS algorithm is used to transform the body frame to the inertial frame of the rocket trajectory. The motion of rocket rotation is different from the air plane. The rocket has a faster motion and need a high speed computation. The pitch angle (θ) which is being greater than 90º, there will be a problem and it needs the Quaternion equation to solve the problem. In this study, the Quaternion parameters are always normalized with the same value at the time of initial initialization. The results of this study indicate that the calculation of body frame and inertial frames have similar results and showed accuracy between 0.2 - 1 meter. In the process algorithms in real-time INS will require a high-speed microprocessors to speed up the computing time on an embedded system payload. Keywords: Inertial Navigation System, Inertial Measurement Unit, Quaternion, Rocket
SISTEM PENYALA NIRKABEL JARAK JAUH UNTUK MUATAN ROKET (WIRELESS SWITCHING FOR ROCKET PAYLOAD) Endro Artono; Salman Salman
Jurnal Teknologi Dirgantara Vol. 16 No. 2 Desember 2018
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2018.v16.a2976

Abstract

Proses penyalaan sistem elektronika pada muatan roket hasil litbang LAPAN selama ini masih manual, dengan menggeser atau menekan saklar pada tabung muatan roket dari posisi mati (OFF) ke posisi hidup (ON). Sistem penyala muatan roket ini dirancang untuk dapat menyalakan atau mematikan muatan roket dengan tanpa melakukan kontak fisik antara operator dengan roket. Dari hasil penelitian ini, muatan roket dapat dinyalakan ataupun dimatikan dari ruang kontrol (ground station) secara nirkabel. Sistem ini juga dapat melepaskan perangkat antarmuka untuk sistem penyalaan dari badan roket, sehingga tidak mengganggu roket saat diluncurkan. Currently, process for turning on the LAPAN rocket’s payload still manually, by shifting or pushing the manual switch placed on the payload rocket’s body, to the OFF or ON direction/ position. This payload wireless switching system is designed for turning the rocket payload to ON or OFF wirelessly, without any phisical contact from operator to the rocket body. The experiment proof that the rocket payload can be turning ON or OFF from the control room wirelessly. The system can also release the umbilical interface from the rocket body before the rocket launched to prevent disruption.

Page 11 of 34 | Total Record : 333

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