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Andri Agus Rahman
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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 5 Documents
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Search results for , issue "Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara" : 5 Documents clear
Rocket Velocity Estimation for RX-450 Launches Using Image Processing Junjunan, Soleh Fajar; Nugroho, Yuniarto Wimbo; Jihad, Bagus Hayatul
Indonesian Journal of Aerospace Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3935

Abstract

The RX-450 rocket, developed by the Rocket Technology Center BRIN, serves various purposes, from sounding to military applications. This study focuses on estimating rocket velocity during the launch phase. Using MATLAB for image processing and OpenRocket for simulation, we explore the potential of image processing for velocity estimation, providing a cost-effective alternative. Results show velocity estimations trailing those of OpenRocket, attributed to friction force and setup differences. The study emphasizes the importance of camera positioning for accuracy. Despite differences, image processing shows promise, warranting further refinement.
Indonesian Sovereignty Rights in the Case of Entry of Malaysian DA62 Aircraft G-DVOR into Indonesian Territory Siregar, El Renova Ed.; Prabandari, Adya Paramita
Indonesian Journal of Aerospace Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3936

Abstract

The entry of a DA62 aircraft into Indonesian territory from Malaysia has sparked a debate regarding Indonesia's air sovereignty. Indonesia's action to intercept the aircraft before releasing it back has become an interesting subject of research in air law as issues of air sovereignty have not often been the focus of study. Through an understanding of the Chicago Convention on International Civil Aviation and the United Nations Convention on the Law of the Sea (UNCLOS) 1982, it is hoped that an understanding of this issue can guide Indonesia's actions and policies. The research findings using a normative juridical method suggest that Indonesia has legally justifiable grounds to intercept the Malaysian aircraft, and Indonesia's action in releasing the aircraft is in accordance with Indonesia's principles of international politics. However, in the future, challenges regarding historical territory and other issues related to controversies over peaceful routes and outer limits of maritime boundaries have yet to find a middle ground acceptable to all parties.
Flatwise Testing Modeling Study On Aluminium Honeycomb Panel Ramayanti, Sri
Indonesian Journal of Aerospace Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3937

Abstract

Honeycomb sandwich structures are widely used in space applications due to their exceptional performance. Extensive research has been conducted on the response of honeycomb structures to various external loads. The out-of-plane strength, including compression and tensile properties, is a critical aspect of honeycomb structures. Despite some experimental and numerical studies, research specifically addressing the tensile direction, such as flatwise tensile testing in honeycombs, remains limited. This testing focuses on the bond strength between the face sheets and the honeycomb core, as well as the tensile strength of the core itself. Utilizing finite element analysis (FEA) has proven effective for characterizing honeycomb structures under various load conditions. However, the complex geometry of the core requires an enormous number of elements, increasing computation times. Thus, simplifying the model by replacing the hexagonal geometry with a homogenized solid layer with effective material properties is necessary. This study focuses on flatwise tensile testing of aluminum honeycomb using different modeling approaches: discrete, continuum, and equivalent plate models. The discrete model serves as the reference due to its detailed structural representation. The continuum-Gibson model, while reasonably accurate in stress estimation, tends to overestimate displacement. Both equivalent models, Hoff and Reissner, significantly overestimate displacement, with Hoff underestimating stress and Reissner overestimating it. In contrast, equivalent models offer insights, but their accuracy varies, necessitating further calibration for precise predictions. Future research should validate these simulation results with real tests.
Implementation of Satellite Payload Program Reconfiguration on Low-Cost SDR Fadilah, Nurul; Pratomo, Bina; Muhtadin, Nurul; Soedjarwo, Moedji; Pratama, Reyza
Indonesian Journal of Aerospace Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3938

Abstract

A software-defined radio (SDR) is a radio communication system that uses reconfigurable software-based components for digital signal processing and conversion. These radio devices, in contrast to typical radio communication systems, are extremely adaptable and versatile. This technology has recently been implemented in CubeSat payloads for connecting the continuously expanding wireless world. SDR devices provide flexibility and versatility by allowing the payload configuration and application to be modified in orbit. This study presents the concept and implementation of an SDR ground simulator utilizing inexpensive hardware rather than a typical computer. The simulator runs on Raspberry Pi hardware with Linux OS and is written in the Phyton programming language. This work presents a model and algorithm of satellite software reconfiguration implemented in the SDR hardware ground simulator. The concept is simple and easy to implement and is potentially useful to be used in future satellite missions.
Development of A 5.4 Ghz C-Band Microstrip SAR Antenna for A Tsunami Detector Chaniago, Erik; Haidi, Junas; Santosa, Hendy
Indonesian Journal of Aerospace Vol. 20 No. 2 (2022): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2022.v20.a3939

Abstract

A Tsunami is a series of massive oceanic waves resulting from profound tectonic activities in the seabed. The disaster's devastating effect makes fast information delivery during a tsunami crucial in minimizing losses. For this reason, Tsunami warning systems need to be supported by a rapid detection technology. In recent years, radar has been implemented as a tsunami detector due to its sensitivity to oceanic waves. An array antenna using advanced microstrip technology, as the main component of a radar system, can fulfill the requirement for tsunami rapid detection. This paper presents the work that we conducted to develop a tsunami detection antenna using the array approach to improve gain and optimize radiation patterns. We designed a patch antenna with 12 mm in length and 21 mm in width and performed some simulations to obtain the antenna parameters such as gain, bandwidth, and optimal radiation patterns. As the results of our investigation, we determined the resonance frequency to be 5.4 GHz. The study produced a gain of 9.07 dB through simulations on an antenna that resonates at a frequency that meets the antenna work criteria, which include a loss of -26.69 dB, a VSWR of 1.09, and an HPBW (Half Power Beamwith) of 17.3°. Those values indicate that the antenna designed for tsunami detector applications functions correctly.

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