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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 373 Documents
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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.
PENELITIAN PEMBUATAN POLI METIL METAKRILAT Wahyuni, Dwi; Dewi, Sri Rukmini
Indonesian Journal of Aerospace Vol. 2 No. 1 (2004): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The poly methyl methacrylate (PMMA) research has been excecuted. Methyl methacrylate is polymerized by the free radical inisiation with the suspension condition using benzoyl peroxyde inisiator, water as a solution and the gelatine stabilizer, in this reseaarch is executed as a standard ratio (part per part:monomer : water : stabilizer = 100 : 350 : (0.1 1) with the inisiator to monomer ratio variation (part per part) are: 0.1 per 50; 0,175 per 50; 0,25 per 50; 0,25 per 50, the temperature variation are : 30 degree C, 45 degree C, 60 degree C and the time polymerization until 320 minutes. The result showed that the optimum monomer polymerizeation was at the inisiator to monomer ratio 0,25 per 50, the temperature at 45 degree C and at the time polymerization until 300 minutes with the monomer conversion was 86 percent. The Infra Red Spectroscopy analyses showed that there are poly methyl methacrylate in the product. The Gas Liquid Chromatography analysis showed the evolution of the monomer (methil methacrylate concetration.
Characterization of Do-It-Yourself (DIY) Ultra Compact ITERA Robotic Telescope (UTOPIA-Scope) Mounting Barends, Renza Alvionzo; Prastyo, Hendra Agus; Rozzykin, Achmad Zainur; Wahidin, Alka Budi; Wibowo, Ridlo Wahyudi; Yusuf, Aditya Abdilah; Oktaviandra, Adhitya
Indonesian Journal of Aerospace Vol. 23 No. 2 (2025): Indonesian Journal Of Aerospace
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/ijoa.2025.4098

Abstract

Low-cost and locally fabricated robotic telescope systems are increasingly important for education, amateur astronomy, and basic scientific observation. This paper presents the characterization of the UTOPIA-Scope, a do-it-yourself (DIY) alt-azimuth robotic telescope mount developed using extruded aluminum structures and 3D-printed strain-wave gears. The performance of the mount was evaluated through pointing and tracking tests using an alt-azimuth grid and selected equatorial stars. Image center coordinates were obtained using plate-solving techniques and analyzed with descriptive statistical methods. The results show average pointing errors of 1.600° ± 0.123° in azimuth, 0.415° ± 0.048° in altitude, and 0.451° ± 0.106° in equatorial pointing, corresponding to approximately 96′, 25′, and 27′, respectively. Tracking tests indicate drift rates of 22–36 arcsec per minute, depending on the observed sky region. These results provide a quantitative baseline for the performance of the UTOPIA-Scope mount and serve as a reference for further mechanical and control-system improvements toward future scientific applications.
On The Use Of The Cohesive Zone Model In Validating Mixed-Mode Bending Apparatus Design Syamsudin, Hendri; Suada, M Giri; Adhitama, Muhammad Daffa
Indonesian Journal of Aerospace Vol. 23 No. 2 (2025): Indonesian Journal Of Aerospace
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/ijoa.2025.7078

Abstract

Understanding the strength of adhesive materials has been increasingly relevant due to their expanding use in many industries. The importance of understanding its mixed-mode behavior also increases since realistic loading cases rarely involve pure mode I and pure mode II loads. The mixed-mode bending (MMB) test, standardized by ASTM D6671, is a particularly intriguing test that could be used to map adhesive strength in a whole range of mixed-mode ratios, only by using a single specimen design. An MMB apparatus design has been developed based on guidelines provided by ASTM D6671 to test aluminum adherends with modifications that conform to local manufacturing capabilities and material availability. This design was then numerically inspected using the Cohesive Zone Model (CZM) and Benzeggagh-Kenane (B-K) model to check its validity and understand its work range. Mesh convergence test, adherend stiffness variation, and adhesive strength variation were conducted in ABAQUS. Results show satisfactory stability and validity of the design to test aluminum adherends.
Ensuring Suitability of Ground Support Equipment: The Role of AMC in Maintenance Supervision Sari, Mustika; Virgie Priskila; Alit Sodikin
Indonesian Journal of Aerospace Vol. 23 No. 2 (2025): Indonesian Journal Of Aerospace
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/ijoa.2025.8941

Abstract

The decision of Apron Movement Control (AMC) in supervising the feasibility of Ground Support Equipment (GSE) is a crucial aspect of airport operations to ensure the safety and efficiency of flight services. This study aims to develop an effective and comprehensive decision-making model in assessing the feasibility of GSE using the Analytical Network Process (ANP) method. The research was conducted at Yogyakarta International Airport, Indonesia involving various criteria and subcriteria which include Engines, Safety Features, Vehicle Operation Licenses. The ANP method was chosen because of its ability to handle complex relationships and interrelationships between various assessment elements. The data was obtained through a questionnaire filled out by experts and related industry players, then analyzed to determine the weight and priority of each criterion. The results of the analysis show that Document Validity, Corrective Actions and Leaks have the greatest influence in the feasibility assessment of GSE. This study is expected to make a significant contribution to improving GSE safety standards and operational efficiency at airports, as well as a reference for AMC in conducting more structured and systematic supervision. The findings are also expected to encourage the application of the ANP method in various aspects of feasibility assessment and other managerial decisions in the aviation industry.
Implementation of Kalman Filter for Accuracy Improvement and Angular Stability as a Control Reference Parallel Manipulator for Camera Pointing on CAN Satellite Fahrizal, Muhammad; Hanafi, Nofria
Indonesian Journal of Aerospace Vol. 23 No. 2 (2025): Indonesian Journal Of Aerospace
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/ijoa.2025.8981

Abstract

This study focuses on the application of the Kalman Filter to improve the accuracy and stability of angular data obtained from Inertial Measurement Unit sensors, which are often affected by noise and bias. The refined angular data serves as a control reference for the parallel manipulator used in the camera pointing system on CAN satellites. Accurate and stable reading angles are essential to ensure precise camera alignment, especially in dynamic environments with disturbances. This study integrates the Kalman Filter into the IMU data processing pipeline to filter the raw roll, pitch, and yaw. We tested the yaw stability improvement by 5.29% and filter performance improvement with 29.25% accuracy, pitch stability improved by 4.63% with 31.12% filter accuracy improvement, and roll stability improved by 1.71% with 28.99% filter accuracy improvement. These filtered angles are then used to control the parallel manipulator, allowing for precise orientation adjustment. The system performance is evaluated in terms of angular accuracy, stability, and manipulator responsibility. The results show a significant improvement in the angular quality of the data, with reduced noise and bias, leading to improved manipulator control. This implementation supports the development of high-precision camera systems for CAN satellites, which require robust and reliable orientation mechanisms. The proposed approach contributes to advancing control systems in small-scale satellite technology, where accuracy and stability are of critical importance. This study highlights the potential of the Kalman Filter in enhancing sensor accuracy for CAN satellite camera pointing systems. However, further research is needed to address dynamic environmental variations that may affect sensor performance. Future studies could explore integrating complementary filtering techniques or machine learning models to optimize data fusion and improve overall system resilience.
Structural strength analysis of unmanned aerial vehicle (UAV) wings with varying wingtip extension configurations Pandie, Andry Renaldy; Azhary, Taufik; Kirillov, Aleksey Vladimirovich
Indonesian Journal of Aerospace Vol. 23 No. 2 (2025): Indonesian Journal Of Aerospace
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/ijoa.2025.13660

Abstract

This study investigates the structural performance of three wingtip configurations—single winglet, double winglet, and fence wingtip extension—for UAVs under specified static loading conditions using Patran/Nastran simulations. The analysis focuses on stress distribution and safety margins. The single winglet exhibits maximum stress, highlighting its capacity to safely withstand the applied loads while offering a simple design for easier manufacturing. The double winglet demonstrates reduced maximum stress, reflecting a balanced trade-off between strength and design complexity. The fence wingtip extension achieves the highest structural robustness, showcasing superior load-bearing capacity but with increased manufacturing complexity. The findings reveal that the fence wingtip extension is the most reliable in terms of structural strength and safety, making it suitable for high-performance UAV applications. Meanwhile, the single winglet emerges as the most practical option for cost-efficient production without compromising structural integrity. The double winglet is a viable compromise, combining moderate structural advantages with reasonable manufacturability.

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