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All Journal Jurnal Ilmiah Edunomika (JIE) Indonesian Journal of Aerospace
Ediwan, Ediwan
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Aerospace Engineering Astronomy Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education

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Research on the Transmissibility of Wire Rope Insulators as Damping Equipment on the RX 200 Rocket Payload Djatmiko, Agus Budi; Ediwan, Ediwan; Ronald, Ronald; Putra, Gunawan
Indonesian Journal of Aerospace Vol. 19 No. 1 (2021)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2021.v19.a3556

Abstract

Wire rope insulator or steel wire rope insulator has applications for vibration isolation in equipment and structures in many industrial machinery. Steel wire rope insulators can also be used as suitable equipment to dampen vibrations in rocket loads. The disturbance acceleration as the excitation caused by the combustion process on the rocket can cause a vibration with a large amplitude which results in damage to the rocket's payload structure and the electronic equipment on the rocket's payload cannot work as desired. Based on the experience of electronic equipment, it will be damaged if the disturbance acceleration of 3 g acting on the rocket is not reduced, for this reason a vibration damping device is designed, the apparatus consists of several stainless steel wire ropes tied between two parallel binders arranged in such a way as to provides a damping effect on the rocket's payload. A wire rope insulator consists of several stainless steel wire ropes tied between two parallel straps. One application of this type of wire rope insulator is to isolate the vibrations that occur in the rocket, so that it does not interfere with the performance of the electronic equipment on the rocket's payload. Electronic equipment is used to determine the position of the rocket and its stability. In this study, the wire rope material used is stainless steel with syield = 350 e+6 N / m2 with a diameter of d = 3 mm. The research objective of the vibratory damper of wire rope insulators was to determine the magnitude of the transmissibility of the ruffler during and after resonance. Transmissibility (TR) is the ratio of the force transmitted to the disturbing or excitation force. The results of the research on a damper with a disturbance acceleration of 3 g at resonance, obtained the transmissibility value (TR) = 2.54, the spring stiffness k = 200537.3 N/m and the damping coefficient c = 331.5 N/m/sec, then after conditions  obtained transmissibility (TR) <1 This shows that the damper with steel wire isolator is good enough to dampen vibrations in the RX 200 rocket payload.
PENGARUH KETEBALAN DI TENGAH TABUNG MOTOR ROKET RX 122 YANG PANJANG (THE EFFECT OF THICKNESS IN THE MIDDLE OF RX 122 LONG ROCKET MOTOR TUBE) Ediwan, Ediwan
Indonesian Journal of Aerospace Vol. 15 No. 2 Desember (2017): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2017.v0.a2503

Abstract

Pada perhitungan tabung roket akibat pengaruh tekanan dan temperatur, bila perbandingan antara panjang dan diameter cukup besar, perlu memperhitungkan terjadinya tegangan bending akibat berat dan tegangan buckling akibat ketebalan. Untuk menghindari tegangan tersebut maka bagian tengah tabung harus lebih tebal agar tegangan bagian tengah berkurang, tetapi tidak menimbulkan tegangan yang lebih besar lagi. Analisis yang lebih mendalam tentang tabung dilakukan pada tabung yang cukup panjang yaitu 2000 mm dan diameter 122 mm. Analisis yang dilakukan hanya dari pengaruh tekanan saja pada tabung yang tebalnya sama dan tabung yang tengahnya dipertebal, dengan tujuan untuk melihat pengaruh penebalan bagian tengah tabung tersebut dan sampai ketebalan berapa tabung bagian tengah diizinkan sehingga akibat terjadinya bending dan buckling dapat diabaikan.
Implementasi Materi Fiqih Jual Beli Dalam Pembelajaran E-Commerce Di Madrasah Aliyah Persatuan Guru Agama Islam Padang Ediwan, Ediwan; Khadijah, Khadijah; Sari, Widya
JURNAL ILMIAH EDUNOMIKA Vol. 9 No. 4 (2025): EDUNOMIKA
Publisher : ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/jie.v9i4.18752

Abstract

This study examines the implementation of Islamic jurisprudence (fiqh) on commercial transactions (buying and selling) within e-commerce learning at Madrasah Aliyah Persatuan Guru Agama Islam Padang through a literature review approach. The research addresses the growing need for integrating fiqh concepts with digital economic practices as online trading becomes increasingly central in students’ daily lives. This study aims to analyze how the principles of fiqh al-buyu’, including pillars, conditions, lawful and unlawful practices, and the prohibition of gharar, can be effectively incorporated into e-commerce learning materials. Using a systematic literature review, relevant books, scholarly articles, and contemporary studies on Islamic commercial law and digital transactions were examined. The findings indicate that e-commerce practices can be aligned with Islamic legal principles when clarity of contract, consent of parties, halal goods, and transparent procedures are ensured, as supported by the Qur’anic principle “wa ahallallāhu al-bay’” (Q.S. Al-Baqarah: 275). The study concludes that integrating fiqh of buying and selling into e-commerce learning enhances students’ understanding of sharia-compliant digital transactions and strengthens their literacy in Islamic economics in the digital era. Keywords: Fiqh of Buying and Selling, E-Commerce, Learning, Islamic Economic Literacy, Digital Transactions
Co-Authors Djatmiko, Agus Budi Khadijah Khadijah Putra, Gunawan Ronald Ronald Widya Sari