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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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Development of Mobile Ground Control System and GPS Base Auto Tracking Antenna Herma Yudhi Irwanto
Jurnal Teknologi Dirgantara Vol. 16 No. 1 Juni 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.a2880

Abstract

Flight test of both rocket and high speed Unmanned Aerial Vehicle (UAV), which is currently developed by LAPAN, can not be separated from the need for a monitoring system of all the attitude of the vehicles. Utilizing and combining some of the available equipment components into a ground control system (GCS) equipped with GPS based auto tracking antenna, makes it easy in previous flight test activities that only do tracking antenna manually. This ground control system is equipped with automatic tracking antenna that always leads to the vehicle, so that the data attitude of flying the vehicle will be maximally monitored and analyzed directly with ease. This system has been tested on a laboratory scale related to testing using hardware in the loop simulation system
ANALISA PERUBAHAN STATIC MARGIN PERANCANGAN ROKET KENDALI RKX 70 MM Salam Ginting; Maryono Ismail
Jurnal Teknologi Dirgantara Vol 7, No.1 Juni (2009)
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

Roket ini dirancang untuk roket kendali sehingga dibutuhkan gerakan manuver yang lincah, cepat, dan akurat. Roket ini dilengkapi dengan 4 kontrol canard dipasang pada bagian depan dan 4 buah sirip dipasang di bagian nozel roket. Nilai statik margin roket ini positif sehingga roket ini dapat digolongkan jenis unstable missile. Sistem kendalinya sudah aktif saat roket lepas dari peluncur mengikuti program pengendalian yang sudah tersedia. Titik berat roket ditetapkan pada titik 0,7 kali panjang roket terhitung dari nose cone. Pusat tekanan aerodinamikanya dihitung setelah diperoleh koefisien aerodinamika gaya angkat roket menggunakan metode Quadrature Multhopp, yang lazim digunakan dalam perancangan aerodinamika roket. Tulisan ini merupakan hasil dari perancangan aerodinamika roket secara teoritis yang harus divalidasi dengan hasil penelitian yang sudah baku yakni penelitian NACA Report untuk roket yang sejenis.
UJI AERODINAMIK MODEL KAPAL BERSAYAP WING IN SURFACE EFFECT SEBAGAI INPUT KAJIAN GERAK PLANNING MENJELANG TAKE-OFF - Iskendar; A. Farid Widodo; Taufiq Mulyanto; Paulus Indiyono
Jurnal Teknologi Dirgantara Vol. 8 No.1 Juni 2010
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

This paper describes aerodynamic tests (wind tunnel tests) for a model of Wing in Surface Effect Craft 8 seater, WiSE-8. The tests were conducted at UPT-Laboratorium Aero Gasdinamika dan Getaran (LAGG)-BPPT, PUSPIPTEK, Serpong, to determine the performance of the lift and pre-take off craft conditions. This craft model with scale of 1 per 6 was tested with rigid body - upside up - power off method. The profile of craft wing model was aerofoil form, Clark-Y. The craft model test with complete configuration (Wing-Body-Pontoon-Nacelle-Tail) was carried out with the following parameters, wind speed of 20, 30, 40, and 50 m per sec, angle of attack of -6 to 18 degree, yaw angle of 0 degree, ground board height 0-1 m (in respect to prototype value of 0-6 m). Meanwhile,the tests of air flow visualization were carried out by using wool tuft at speed of 40 m per sec. The result of wind tunnel test consisting of CL, CD, CM, and CL-CD was validated by theoritical calculation using Vortex Lattice Method (VLM) and Datcom software. Then this result was evaluated and extrapolated to predict the movement of WiSE-8 in the pre take off performance condition, especially in the longitudinal direction.
KAJIAN EKSPERIMENTAL TENSILE PROPERTIES KOMPOSIT POLIESTER BERPENGUAT SERAT KARBON SEARAH HASIL MANUFAKTUR VACUUM INFUSION SEBAGAI MATERIAL STRUKTUR LSU Kosim Abdurohman; Aryandi Marta
Jurnal Teknologi Dirgantara Vol. 14 No. 1 Juni 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.a2948

Abstract

Vacuum infusion is a manufacturing method to improve mechanical properties of composite. Before apply this in LSU structure, it should be experimented using tensile test to know mechanical properties of the composite. Tensile test is an experimental to know tensile strength, modulus of elasticity, and failure modes of composite. Experimental process of CFRP composite using unidirectional carbon fiber and polyester matrix was done using vacuum infusion technology, strart from specimens preparation until testing steps. Manufacturing results gave the values of composite density and thickness; mass and volume fraction of fiber and matrix materials. Specimens and testing process are refer to ASTM D3039 tensile test standard for composite matrix polymers. The testing results showed 1011.67 MPa ultimate tensile strength, 59074.96 MPa modulus of elasticity, and SGV (long spliting, gage, various) failure mode . ABSTRAKVacuum infusion merupakan salah satu metode manufaktur yang digunakan untuk meningkatkan sifat mekanik komposit. Untuk mengaplikasikan metode ini dalam pembuatan struktur LAPAN Surveillance UAV (LSU), perlu diketahui terlebih dahulu sifat mekanik dari komposit hasil metode ini secara eksperimen. Salah satu eksperimen yang dilakukan yaitu pengujian tarik untuk mendapatkan tensile strength, modulus elastisitas, dan failure mode yang terjadi pada komposit. Eksperimen dilakukan terhadap komposit CFRP menggunakan material serat karbon searah (UD) 0⁰ dan matriks poliester dibuat dengan metode vacuum infusion mulai dari tahap preparasi sampai tahap pengujian. Dari hasil manufaktur didapat nilai densitas dan ketebalan komposit serta fraksi massa dan fraksi volume material penyusun komposit. Spesimen dan proses pengujian mengikuti standar ASTM D3039 yang merupakan standar pengujian tarik untuk komposit dengan matriks polimer. Hasil pengujian menunjukkan nilai ultimate tensile strength 1011,67 MPa, modulus elastisitas 59074,96 MPa, dan failure mode SGV (Long Spliting, Gage, Various).
THE COMPARATION OF TWO LAPAN'S PROPELLANTS OF DIFFERENT COMPOSITION Bagus H. Jihad; Tresna P. Soemardi; Dedi Priadi
Jurnal Teknologi Dirgantara Vol 5, No.1 Juni (2007)
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

This paper compares two LAPAN'S propellant compositions. The A propellant has a composition of AP/AL/Binder with ratio of 70/10/20, and propellant B has ratio 75/7.5/17.5, both with HTPB base but different curing agent. As comparator of this simulation is RX-1512.01 rocket that has flight tested. The performances which compared are specific impulse and efficiency characteristic. Result shows that the propellant B gives higher specific impulse, however higher losses is, about 5.373 percent. One to be considered is that the propellant B produce combustion temperature higher than propellant A by 200 k, that may influence the rocket structures. Keywords: Impuls specific, characteristic efficiency, propellant, simulation.
KARAKTERISTIK RAW MATERIAL EPOXY RESIN TIPE BQTN-EX 157 YANG DIGUNAKAN SEBAGAI MATRIK PADA KOMPOSIT (THE CHARACTERISTICS OF RAW MATERIAL BQTN-EX 157 EPOXY RESIN USED AS COMPOSITES MATRIX) Sri Rahayu; Mabe Siahaan
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.v0.a2526

Abstract

The objective of the research is to characterize resin raw material used as matrix in composite. Resins are rigid or semi-rigid polymer materials at room temperature, whereas epoxy resins are a class of organic chemical bonding systems used in special coating or adhesive preparations. This study reports the composition effect of BQTN-EX 157 epoxy resin with its hardener on mechanical, physical, and chemical properties. For the purpose, samples were prepared by varying the composition of the mixture (volume fraction) between epoxy resins and hardener ie 2: 1/4, 2: 1/2, 2: 3/4, and 2: 1. The mixture was molded into plate sheets for 7 days, then were formed into test specimens. The specimens were tested for their ultimate tensile strength (σu,) with Universal Testing Machines (UTM) AND RTF-2410 series, their densities (ρ) with FH-MD200 series densitometer, and their molecular group with IR Prestige-21 series FTIR. Results show that the lowest and highest mean tensile strength values of 16.4872 and 57.9254 MPa were produced in the mixed compositions of 2: 1/4 and 2: 1, the lowest mean density was 1.1065 g/cc and the highest was 1.1430 g/cc on a mixture of 2: 1 and 2: 1/4 compositions. Furthermore, the absorption frequency value occurs at 1050 -1700 cm-1 and in this frequency region the lowest and highest formation of peak C-O and C=C occurs. Thus it can be concluded that if the amount of volume fraction of hardener more mixed with epoxy resin will increase ultimate tensile strength; decreases density; and resulting into the formation of C-O and C=C compounds. ABSTRAKTujuan dari penelitian adalah mendapatkan karakterisasi raw material resin yang digunakan sebagai matrik pada komposit. Resin adalah material polimer yang kaku atau semi kaku pada suhu kamar, sedangkan epoxy resin adalah kelas sistem ikatan kimia organik yang digunakan dalam preparat lapisan khusus atau perekat. Penelitian ini melaporkan pengaruh komposisi resin epoxy BQTN-EX 157 dengan hardener terhadap sifat mekanik, fisis, dan kimia. Untuk itu, sampel dibuat dengan variasi komposisi campuran (fraksi volume) antara epoxy resin dengan hardener 2:1/4, 2:1/2, 2:3/4, dan 2:1. Kemudian campuran dicetak menjadi lembaran plat selama 7 hari, setelah itu lembaran plat dibentuk menjadi spesimen uji. Selanjutnya spesimen diuji kuat tariknya (σu) dengan Universal Testing Machines (UTM) seri AND RTF-2410, densitasnya (ρ) dengan densitometer seri FH-MD200, dan group molekulernya dengan FTIR seri IRPrestige-21. Secara berturut-turut, nilai rata-rata kuat tarik terendah dan tertinggi adalah 16.4872 dan 57.9254 MPa yang dihasilkan pada komposisi campuran 2 : 1/4 dan 2 : 1,  nilai  rata-rata densitas terendah 1.1065 g/cc dan tertinggi 1.1430 g/cc pada komposisi campuran 2 :1 dan 2 : 1/4. Selanjutnya nilai frekuensi penyerapan terjadi pada 1050 ~ 1700 cm-1 dan pada daerah frekuensi ini terjadi pembentukan peak C-O dan C=C terendah dan  tertinggi. Dengan demikian dapat disimpulkan bahwa jika jumlah fraksi volume dari hardener semakin banyak dicampur dengan resin epoxy akan meningkatkan kuat tarik; menurunkan densitas, dan menghasilkan pembentukan senyawa C-O dan C=C.
ANALISIS BEBAN HENTAK STRUKTUR PENYANGGA LANDING GEAR PESAWAT NIR AWAK LSU03 (SHOCK LOAD ANALYSIZES FOR THE LSU03 UAVS LANDING GEAR SUPPORT STRUCTURE) Atik Bintoro
Jurnal Teknologi Dirgantara Vol. 11 No.2 Desember 2013
Publisher : National Institute of Aeronautics and Space - LAPAN

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Abstract

Pesawat nir awak LSU03 adalah pesawat nir awak yang dikembangkan oleh Lapan, untuk misi pembawa muatan kamera foto maupun video. Dalam operasinya, LSU03 akan melalui siklus terbang dan mendarat dengan frekuensi yang cukup tinggi, khususnya untuk pengisian bahan bakar dan perawatan. Pada saat awal pendaratan di landasan udara, terjadi beban hentak yang dapat mempengaruhi keandalan struktur. Melalui metode analitis persamaan beban hentak, masukan data konfigurasi pesawat nir awak LSU03, dan pernyataan misi karakteristik, telah dilakukan penelitian dan analisis beban hentak struktur penyangga landing gear pesawat nir awak LSU03 pada saat awal pendaratan di landasan. Dari analisis hasil penelitian diketahui bahwa struktur penyangga yang berukuran tebal 2 mm, lebar 8 mm, terbuat dari komposit jenis serat e-glass mampu menerima beban hentak tersebut. Kata kunci: Beban hentak, Struktur penyangga, Landing gear, LSU03, Pesawat nir awak
UJI VALIDASI TERMAL VIBRASI UNTUK MUATAN MISI MIKROSAT Agus Harno Nurdin Syah
Jurnal Teknologi Dirgantara Vol 2, No.1 Juni (2004)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2004.v2.a789

Abstract

To launching a spacecraft (rocket and satellite) including all of the systems, some rules and regulation of validation test for all the spacecraft systems is needed. Validation test mentioned is done to find out the ability of all the systems to the environmental influences of the external although internal with measurements simultaneously done. This is including possibilities the operating all of the electronic systems and epending the life times, operation time of the internal and external condition to the parameters effect of environmental the spacecraft systems. Thermal vibration is two parameters effect of environmental which would receiped simultaneously by the microsatellite or spacecraft on trajectory time when the spacecraft inside of the thermospheer zone at height about (80-500) km and the exospher zone at height about (500-1000)km under the seal level. Therefore, thermal vibration test is very important to do before a spacecraft or microsatellite would be launched, because the environmental parameters is very dangerous to the microsatellite or spacecraft mission payload.
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) Tommy Sugiarto; Imas Tri Setyadewi; Aryandi Marta; Gunawan Setyo P.
Jurnal Teknologi Dirgantara Vol. 13 No. 2 Desember 2015
Publisher : National Institute of Aeronautics and Space - LAPAN

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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.Kata Kunci: Pesawat Tanpa Awak, Sel Surya, Motor Brushless, Solar LSU, LabVIEW
PENGARUH PENAMBAHAN GLOVE DAN PENGURANGAN YEHUDI SERTA PERGESERAN LOKASI APEX TERHADAP KARAKTERISTIK AERODINAMIKA SAYAP PESAWAT TERBANG I G.N. Sudira
Jurnal Teknologi Dirgantara Vol 9, No. 2 Desember (2011)
Publisher : National Institute of Aeronautics and Space - LAPAN

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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. Keywords: NWDU, VSAERO, Glove, Yehudi, Apex

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