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Angkasa: Jurnal Ilmiah Bidang Teknologi

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Published by Institut Teknologi Dirgantara Adisutjipto

ISSN : 20859503 EISSN : 25811355 DOI : 10.28989/angkasa

Core Subject : Science,

Computer Science & IT

Arjuna Subject : -

Articles 16 Documents

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Search results for , issue "Vol 9, No 1 (2017): Mei" : 16 Documents clear

Visualisasi Alat Musik Tradisional Gong Waning Menggunakan Animasi 3D Nurcahyani Dewi Retnowati; Kristina Nona
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Gong Waning is a traditional musical instrument o f Sikka community o f East Nusa Tenggara which is played by beating. In its development, not many young people who can play this instrument. Therefore it is very necessary to design and create an animated model o f the introduction of traditional Gong Waning musical instruments using 3Ds.Max and on sound using unity software. The output o f visualization o f traditional musical instrument Gong Waning in the form o f animation and sound display so hopefully can be more easily in studying and using musical instrument Gong Waning.

Algoritma Adaptif Sistem Downlink Menggunakan Recursive Least Square (RLS) Agus Basukesti; Bangga Dirgantara
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

GPS (Global Positioning System) is the popular system for navigation which assistance 32 satellites orbiting the earth. Currently, tracking positions using the Global Positioning System (GPS) is one of the best positioning tracking methods. However, GPS has a lot o f noise, so filters are needed to handle with noise on GPS. In this research, the simulation is done to extract data from GPS sensors using RLS algorithm. From the results o f identification and simulation, it can be concluded that the algorithm works well and need to analyze the advantages and disadvantages to be implemented on the downlink system designed. From the simulation results obtained that error estimation is convergent that is the longer the smaller.

ESTIMASI CADANGAN BATUBARA DENGAN SOFTWARE TAMBANG PADA PIT DE DISITE BEBATU PT. PIPIT MUTIARA JAYA KABUPATEN TANA TIDUNG, KALIMANTAN UTARA A.A Inung Arie Adnyano
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Lokasi penambangan PIT DE PT. Pipit Mutiara Jaya, Site Bebatu dengan lahan seluas 3.024 Ha terletak di Desa Bebatu Kebun, Kecamatan Sesayap Hilir, Kabupaten Tana Tidung, Provinsi Kalimantan Utara. Metode estimasi yang digunakan yaitu metode sayatan penampang (cross section) yang berdasarkan pada pedoman rule o f gradual changes dan rule o f nearest point. Estimasi pedoman rule o f gradual changes didapatkan total cadangan terkira adalah 2.605.121,944 ton, volume material gambut adalah 811.218,008 m3, volume material softclay adalah 4.413.869,289 m3, volume mixing adalah 2.206.934,637 m3 dan volume material hardclay adalah 11.638.177,066 m3. Perhitungan berdasarkan pedoman rule o f nearest point sebagai berikut: total cadangan terkira adalah 3.047.878,132 ton, volume material gambut adalah 918.114,558 m3, volume material softclay adalah 5.040.942,037 m3, volume mixing adalah 2.520.471,018 m3 dan volume material hardclay adalah 12.858.788,961 m3. Nilai stripping ratio dari hasil kedua perhitungan adalah sebagai berikut: untuk pedoman rule o f gradual changes dengan nilai SR 7,32 BCM : 1 ton dan untuk pedoman rule o f nearest point dengan nilai SR 7 BCM : 1 ton.

ANALISIS FLIGHTDATA RECORDER KECELAKAAN PESAWAT TERBANG A320 UNTUK MENDAPATKAN STALL SPEED DAN PROSES REKONSTRUKSI KECELAKAAN MENGGUNAKAN SOFTWARE FLIGHTSCAPE Mohammad Ardi Cahyono; Andry Renaldy Pandie
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Aircraft is transportation mode which in it operation refer to all operation procedure be valid. Although that, accident probability will be occur. To help human/analysts to find out and learn more about aircraft accident causes then black box installed in aircraft. Parameters which recorded by black box still in bynari data type, so it must to be processing using Flightscape software and Google Earth application in order to represented and understood by analysts to help analysis process. It so happens, main purposes from this research are to know stall speed value from aircraft A320 which analyzed. Methods which used to finished this research that is simulation method in Flightscape to get video/animation o f flight accident reconstruction, and analysis method as manually to get stall speed o f aircraft.Based on analysis result, be obtained that aircraft stall speed value is 348,0942 kts (when first stall warning) and 150,8151 kts (when three secons before crash).

EVALUASI KERENTANAN GEDUNG REKTORAT STTNAS TERHADAP GEMPA BUMI BERDASARKAN ANALISIS MIKROTREMOR Rizqi Prastowo; Urip Nurwijayanto Prabowo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

STTNAS building is a five floor building that located in the city o f Yogyakarta which is an area with a high intensity earthquake occurrence. The purpose o f this study is (1) determine the value o f the natural frequencies o f the building, (2) determine the index o f the resonance o f the building and (3) the vulnerability o f buildings to earthquakes. Research will be done by measuring the microtremor wave o f building STTNAS then analyzed using Spectral Floor Ratio (FSR). The analysis result is then compared with the classification defined in ISO 2002 on building resilience planning procedures earthquake. Fekuensi natural on the east-west component is 1.64 Hz and the north-south component is 1.644 Hz that is in conformity with the ISO 2002. Resonance Index o f building STTNAS is ranging from 31.00081 to 35.883% thus including the low category resonance during an earthquake. Building of STTNAS vulnerability index ranges are between 103,670.6191 to 82526.5357 with the highest value found on the 4th floor.

NUMERICAL SIMULATIONOF FLEXIBLE WINGOF HALE UAV USING TWO-WAY FLUID STRUCTURE INTERACTION METHOD Buyung Junaidin
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 1 (2017): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

This paper describes numerical simulation o f flexible High Altitude Long Endurance Unmanned Aerial Vehicle (HALE UAV)wingusing two-way fluid structure interaction (FSI) method. The HALE wing is designed with high aspect ratio. This configuration intended to reduce the vehicle induced drag and reduces the lift-loss at wingtip which caused by wingtip vortex. But the structure of the wing itself becomes more elastic that be able to give large deformation when the aerodynamic loads applied. This deformation changes the aerodynamic loads distribution on the wing that gives a new deformation to the wing structure and vice versa. This interaction in a couple process called as fluid structure interaction (FSI). ANSYS 15.0 software was used to simulate fluid structure interaction on the wing. The unsteadiness and viscous flows at low speed are evaluated using the solution o f timedependent Reynolds Averaged Navier-Stokes (RANS) with SST k-rn turbulent model. In addition, multiblock structured grids are generated to provide more accurate viscous result and to anticipate negative volume o f the mesh which may occur due to the deformation o f the wing during simulation. Five different o f simulations are performed with variation o f material characteristics including Young’s modulus and Poisson’s ratio.The results are global aerodynamic characteristics at various material characteristics.

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