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INDONESIA
Indonesian Journal of Aerospace
Published by Badan Riset dan Inovasi Nasional
ISSN : -     EISSN : 30320895     DOI : https://doi.org/10.55981/ijoa
Core Subject : Science, Engineering,
Aerospace Engineering Astronomy
Indonesian Journal of Aerospace provides a broad opportunity for the scientific and engineering community to report research results, disseminate knowledge, and exchange ideas in various fields related to aerospace science, technology, and policy. Topics suitable for publication in the IJoA include (but are not limited to) Space science (astrophysics, heliophysics, magnetospheric physics, ionospheric physics, etc.), Aeronautics technology (dynamic, structure, mechanics, avionics, etc.), Space technology (rocket, satellite, payload system, control, etc.), Propulsion and energetic technology (propellant, rocket static-test, thermodynamics of propulsion system, etc.), Aeronautics and space policy, and Application of aerospace science and technology.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ruang Angkasa dan Ilmu Planet
Articles 365 Documents
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ANALISIS LINTAS TERBANG ROKET MULTI-STAGE RKN200 Sasongko, Rianto. A; Jenie, Yazdi. I; Poetro, Ridanto. E
Indonesian Journal of Aerospace Vol. 9 No. 2 Desember (2011): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

This paper deals with a trajectory analysis of RKN200 multi-stage rocket system. The implementation of a multi-stage configuration means that a separation process has to be taken within the flight phase. The separation process is basically a transition process from a phase with booster as initial/launch propulsion to that with sustainer as the propulsion for the rest of flight time. RKN200 is a multi-stage rocket developed by LAPAN Indonesia for defence applications. In a multi-stage rocket development process, stage separation becomes a critical phase which should be considered carefully, since this phase will significantly affect the entire flight performance of the rocket. In this paper, the trajectory of RKN200 is analyzed in various cases with separation process included. The separation stage is modeled as a discrete process, i.e. by applying a sudden change on the rocket parameters values at the time of separation. In addition to that, impulsive force and moment which occur as a result of the separation ignition will also introduced into the mathematical model of the rocket dynamics, such that their influence to the rocket flight variables can be counted and computed . The modeling, simulation, and analysis of the flight trajectory are conducted using a simulation software already developed for rocket dynamic and performance analysis. Some simulation results are presented and analyzed to evaluate the RKN200 flight trajectory in some flight settings and conditions, and also to observe the effect of stage separation process on the rocket flight.
PENGARUH PENAMBAHAN GLOVE DAN PENGURANGAN YEHUDI SERTA PERGESERAN LOKASI APEX TERHADAP KARAKTERISTIK AERODINAMIKA SAYAP PESAWAT TERBANG Sudira, I G.N
Indonesian Journal of Aerospace Vol. 9 No. 2 Desember (2011): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Success indicator in airplane design process is depended on success or not in wing design process. Wing design process was supported by many design variable and the final result was compromise one from many scientific science or specialist. The first step in airplane wing design after design requirement & objective (DR&O) was defined, is determining wing planform through parametric study. Parametric study was conducted to make sure that all design parameters have been considered especially for aerodynamic and structural aspect. This paper discuses the influence of glove and yehudi changes and also apex location movement with respect to aerodynamic characteristic of the wing. Additional of the glove was intended to compensate yehudi existent due to structural aspect mainly for landing gear placement. Disadvantage of aerodynamics aspect due to yehudi existent is expected will be overcome by additional of glove. Apex location is also important parameter to control the shape of pressure coeffient of wing profile. Apex location can be moved according to sensitivity of designer to achieve design target. For the whole, it can be said that glove and yehudi and also apex location can be isolated its influence to major variable design namely to wing profile pressure distribution. The computer program used in this analysis is integration of the program for wing geometry generation, paneling process and computational fluid dynamic code (CFD), in this case VSAERO, and by author it is called NWDU.
CHARACTERIZATION OF SIZE AND SHAPE OF AMMONIUM PERCHLORATE PARTICLE FROM CHINA, SOUTH KOREA, AND INDONESIA AND THEIR INFLUENCES ON PROPERTIES OF PROPELLANT Hutauruk, Jones; Bura, Romie Oktovianus; Wibowo, Heri Budi
Indonesian Journal of Aerospace Vol. 18 No. 1 Juni (2020): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2020.v18.a3346

Abstract

The aim of this study is to obtain characteristics of ammonium perchlorate particle that used in Rocket Technology Center (LAPAN). Characterization begin from the determination of particle size distribution with Particle Size Analyzer. The SEM is used to obtain information about the morphology of AP, furthermore, the results are reprocessed using ImageJ software to analyze the shape of AP particle, and the Surface area was obtained by using BET. Characteristic of AP such as particle size, shape, and surface area are important parameters because those are directly related to propellant combustion energy. Ammonium perchlorate was procured from China, South Korea, and Indonesia with a particle size of 200µm From this study, the particle size of APC200, APH200 and API200 was obtained, which are 265 µm, 236 µm, and 242 µm, with particle shape aggregate value of 0,68, 0,38 and 0,33, roundness of 0,57, 0,79,0,63, and surface area of 1,104 m2/g, 5,561 m2/g, and 2,972 m2/g.
RANCANG BANGUN SISTEM PENGUJIAN MOTOR BRUSHLESS UNTUK APLIKASI SOLAR-LAPAN SURVEILLANCE UAV BERBASIS LABVIEW (DESIGN OF BRUSHLESS MOTOR PERFORMANCE TESTING SYSTEM FOR SOLAR-LAPAN SURVEILLANCE UAV APPLICATION BASED ON LABVIEW) Sugiarto, Tommy; Setyadewi, Imas Tri; Marta, Aryandi; P., Gunawan Setyo
Indonesian Journal of Aerospace Vol. 13 No. 2 Desember (2015): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Tantangan terbesar dalam pengembangan pesawat tanpa awak adalah keterbatasan energi. Salah satu solusi masalah tersebut adalah dengan menggunakan energi alternatif diantaranya sel surya. Aplikasi pesawat tanpa awak dengan sel surya membutuhkan analisa perhitungan kebutuhan daya pesawat saat terbang, analisa tersebut akan berguna untuk menentukan spesifikasi komponen yang akan digunakan pada pesawat. Penelitian ini akan membahas rancang bangun sistem pengujian kinerja motor brushless untuk aplikasi pada Solar LAPAN Surveillance UAV (LSU) menggunakan perangkat lunak LabVIEW. Dari hasil pengujian sistem ini mampu melakukan pengukuran dengan galat sebesar 1.27%,0.61%, dan 5.65% masing masing untuk pengukuran RPM, tegangan dan arus pada baterai.
RANCANG BANGUN MODEL WAHANA HOVERWING XHW-1 Mulyanto, Taufiq; Baruna, Digit Mitra
Indonesian Journal of Aerospace Vol. 9 No. 2 Desember (2011): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Hoverwing craft is a combination of hovercraft and WiSE-craft. Hoverwing craft operation has transition phase from air cushion lift to aerodynammic lift, and vice versa. A Hovering model, named XHW-1, was designed and built to understand further the design problem related to this kind of vehicle and to observe the transition phase. To simplify construction, manufacture and testing, but without reducing the uniqueness of the vehicle, the model was designed to be operated on a flat surface. The design considered hovercraft related aspect and aircraft aspect as well. The configuration chosen was monohull. The model weight 755 gr, has 1.2 m wing span, and 20 x 30 cm air cushion. Preliminary test showed that air cushion could function properly and that model could reach 3 m/s forward speed.
Roll Amplification of Solid Rocket Motor in LAPAN Sounding Rocket Sudiana, O.; Teofilatto, P.
Indonesian Journal of Aerospace Vol. 18 No. 1 Juni (2020): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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.
PENYEMPURNAAN PROSES PEMBUATAN PROPELAN KOMPOSIT LAPAN BERDASAR HASIL PENELITIAN DARI INDIA (PROCESS IMPROVEMENT OF LAPAN’S COMPOSITE PROPELLANT PREPARATION BASED ON RESEARCH RESULT FROM INDIA) Hartaya , Kendra
Indonesian Journal of Aerospace Vol. 13 No. 2 Desember (2015): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Telah dilakukan pembahasan terhadap proses dalam pembuatan propelan padat komposit. Pembahasan bertujuan untuk mendapatkan kepastian mengenai urutan dalam proses pencampuran bahan baku hingga memperoleh sampel propelan yang siap uji. Pembahasan untuk mendapatkan urutan pencampuran bahan baku dilakukan terhadap makalah-makalah para peneliti dari India dengan sudut pandang bahan baku utama propelan yang yang mudah diperoleh yang terdiri dari binder (HTPB), hardener (isosianat), AP, Al powder. Metode dalam penelitian ini adalah penelitian terhadap kepustakaan dan eksperimen. Eksperimen dilakukan sebagai wujud adopsi teknologi proses dari hasil penelitian kepustakaan. Hasil dari penelitian ini, diperoleh sampel propelan yang dibuat dengan urutan pencampuran HTPB dengan Al powder, setelah campuran homogen ditambahkan AP halus, AP sedang, AP kasar, diakhiri penambahan Hardener. Setelah homogen dicetak dengan dimensi yang diinginkan, dioven pada suhu 60â°C selama 20 jam. Setelah itu pelepasan mandril dan diperoleh propelan siap uji baik uji statik maupun uji fisik. Waktu dari awal pencampuran hingga menjadi sampel siap uji sebesar 125 menit sedang dari teknologi india sebesar 290 menit, sehingga dengan demikian ada alasan untuk menambah waktu proses guna mendapatkan hasil lebih baik dalam hal homogen campuran.
INCREASING DATA TELEMETRI SOUNDING ROCKET LAPAN WITH PULSE CODE MODULATION METHODE Arisandi , Effendi Dodi
Indonesian Journal of Aerospace Vol. 18 No. 1 Juni (2020): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2020.v18.a3353

Abstract

The telemetry data of the sounding rocket when flight in the space is very important to known. This data will be used for next mission or evaluation the last rocket flight. Commonly the data of the sensor in the sounding rocket are accelerometer, gyroscope, magnetometer, GPS and so on. As much data as possible than can be sent to the ground control system when the rocket flies. The problem is when the baud rate is low so not much data can be transmitted. Another problem is when the using serial bit standard communication such as the baud rate is 115.200 which mean that the maximum data in one second is 14,400 characters. It is less than when using the PCM bit rate. Application of PCM in the telemetry for sounding rocket LAPAN is new and need development to reach the optimal. With the PCM method the communication data can transmit around 1.25Mbps or 156,250 characters based on the TR FM02-S-2 full S-band transmitter. In this research, focus to the implementation the PCM method on the FPGA for sending and receiving the data via cable. Two FPGA boards can work together for sending and receiving data with PCM method with the total bit is 1.25Mbps.
ANALISIS DATA SENSOR ACCELEROMETER PADA UJI TERBANG ROKET EKSPERIMEN LAPAN TIPE RX–200 (ANALYSIS SENSOR DATA ACCELEROMETER IN FLIGHT TEST ROCKET EXPERIMENT LAPAN TYPE RX-200) Kurdianto, Kurdianto
Indonesian Journal of Aerospace Vol. 13 No. 2 Desember (2015): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Roket RX–200 adalah jenis roket model balistik dengan diameter 200mm. Roket ini dilengkapi dengan muatan (payload) berupa sensor pengindera gerak berbasiskan mikroprosesor berupa 6-Degree of Freedom (6-DOF) Inertial Measurement Unit (IMU) dan sistem telemetri onboard dengan menggunakan frekuensi 900MHz. Karakteristik terbang roket RX-200 saat uji terbang dapat dianalisis dari data sensor pengindera gerak yang diterima menggunakan antena omni 900MHz dan antena yagi 900MHz. Dari data yang diterima, roket mengalami percepatan hingga sebesar 19.2G, burning out terjadi pada detik ke 7.09, dengan ketinggian terbang roket dari General Position System (GPS) mencapai 1952 m atau 1.9 Km.
ALGORITMA DETEKSI SUDUT AZIMUT DAN ELEVASI ROKET MENGGUNAKAN SEMBILAN ANTENA ARRAY YAGI-UDA Zain, Satria Gunawan; Susanto, Adhi; Widodo, Thomas Sri; Widada, Wahyu
Indonesian Journal of Aerospace Vol. 9 No. 1 Juni (2011): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Radiation pattern of Yagi-Uda antenna is elliptical. This pattern can be used as a detector for the direction of the source of a radio emission. A total of nine Yagi-Uda antennas fitted with a 3x3 configuration. With this configuration, the measurement range for azimuth and elevation angles can reach 80º. The simulation was performed by using an antenna radiation pattern data. The number of antennas used for this simulation is nine. Then the data is merged into a 3x3 antenna configuration data. Based on data from nine antenna radiation patterns, the algorithm for the estimation of azimuth and elevation angles can be applied. Simulation results show that the measurement error of the signal without noise is close to zero. The algorithm used in this simulation can be applied to noise below 25%.

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