Angkasa: Jurnal Ilmiah Bidang Teknologi
ISSN / EISSN : 2085-9503 / 2581-1355
Current Publisher: SENATIK (10.28989)
Total articles ≅ 62
Latest articles in this journal
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 13; doi:10.28989/angkasa.v13i1.784
Cargo plays a very important role in the aviation industry as a supporting revenue. In Airline X, cargo supports the revenue by 4% - 6% of the total revenue. There are opportunities to optimize the cargo compartment in Airline X by analyzing every agent involved in the purpose to know the optimum cargo loaded into the compartment using Agent-Based Modelling. The method used in this research is Rejection Sampling in Monte Carlo and Agent-Based Modelling. In addition, the theory used in this research is distribution function, to determine what type of distribution that represents the agent behavior. The final result shows that with the predetermined number of iterations, which is 300 iterations, the optimal value was obtained base on the convergent result. On the other hand, the distribution of passenger and baggage described as the Gaussian Distribution Function, while the distribution of EBT described as the Negative Exponential Distribution Function. These distributions represent agent behavior.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 13; doi:10.28989/angkasa.v13i1.916
Penelitian ini bertujuan untuk mengetahui pengaruh dari refiner time (waktu penggilingan ulang) terhadap kualitas tissue.Data yang dikumpulkan adalah data primer saat proses pembuatan tissue (handsheet).Waktu untuk LBKP (5, 10 dan 25) menit dan NBKP (10, 30 dan 40) menit. Masing-masing pulp dibuat sebanyak 2 buah. Kemudian dilakukan pengujian di Laboratorium QC dengan faktor pengujian yang menentukan kualitas tissue. Seperti:freeness(derajat giling), thickness(ketebalan), machine direction tensile(kekuatan), basisweight (berat), elongation (daya mulur) dan porosity(kerapatan serat). Hasil yang didapat jika semakin lama refiner time,maka (1) freeness akan semakin rendah, (2) thickness akan semakin tinggi, (3) measure direction tensile akan semakin tinggi, (4)elongation akan semakin tinggi dan (5) porosity akan semakin tinggi. Namun tidak akan memengaruhi nilai dari basis weight. Keywords Tissue(Handsheet),Refiner Time, Quality Control References R. Sangkay, "Strategi Pemasaran kreatif Yang Diterapkan di PT Otomodo Manado Town Square," Jurnal Riset Bisnis dan Manajemen, vol. V, no. 4, pp. 639-656, 2017. H. Holik, Handbook of Paper and Board, Weinheim: Wiley VCH Verlag GmbH & Co.KGaA, 2006. H. Sixta, Handbook of Pulp, Weinheim: Wiley VCH, 2006. H. Rachmawati and T. Hidayat, "Efektivitas Berbagai Indikator Penggilingan untuk Memprediksi Kualitas Kertas," Jurnal Selulosa, vol. I, no. 2, pp. 72-80, 2011. K. Syamsu, H. Roliadi, K. P. Chandra and A. J. Arsyad, "Kajian Proses Produksi Pulp dan Kertas Ramah Lingkungan dari Sabut Kelapa," Jurnal Teknologi Pertanian, vol. IX, no. 1, pp. 16-25, 2014. R. M. Alfathy, M. P. Aji and Sulhadi, "Analisis Variasi Warna Terhadap Kualitas Daya Serap dan Kuat Tarik Tissue Napkin Paper," Jurnal Ilmu Pendidikan Fisika, vol. II, no. 1, pp. 25-27, 2017. S. Bahri, "Pembuatan Serbuk Pulp dari Daun Jagung," Jurnal Teknologi Kimia Unimal, vol. IV, no. 1, pp. 46-59, 2015. Y. Setiawan, S. Purwati, A. Surachman, R. I. W. and K. J. Pramono, "Pemanfaatan Plastik Limbah Reject Industri Kertas untuk Bahan Bakar," in Seminar Teknologi Pulp dan Kertas, Bandung, 2015. R. Masriani and T. Hidayat, "Perancangan Metode Pengukuran Kemampuan Daur Ulang Kertas," in Seminar Teknologi Pulp dan Kertas, Bandung, 2015. Falahudin, Irfan and N. Aini, "Pengaruh Penambahan Bahan Chemical Wet Strength dan Dry Strength dalam Proses Pembuatan Tissue Napkin 18 GSM," Program Studi S-1 Teknologi Pengolahan Pulp dan Kertas, Fakultas Vokasi, Institut Teknologi Sains Bandung, Bandung, 2014. H. Risdianto, S. K. Wirawan and S. Sugesty, "Aplikasi Lakase pada Proses Refining Pulp," Jurnal Selulosa, vol. IX, no. 2, pp. 65-74, 2019. D. Wikanaji and T. Trisnawati, "Pengembangan Serat Dan Efisiensi Energi Pada Kombinasi Refining Konsistensi Tinggi Dan Rendah," Jurnal Selulosa, vol. I, no. 1, pp. 8-14, 2011. http://dx.doi.org/10.28989/angkasa.v13i1.916 Refbacks There are currently no refbacks.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 13; doi:10.28989/angkasa.v13i1.807
Micro, Small and Medium Enterprises (MSME) can be defined as a productive business that can be owned by individuals or business entities and has met the criteria as a micro business. UMKM is one of the spearheads of an independent economy that has great development potential, so that the existence of MSMEs can strengthen the people's economy. One area that has a lot of MSMEs is Gunungkidul Regency which is located in the Special Region of Yogyakarta. There are many obstacles in the UMKM business in Gunungkidul Regency, one of which is in marketing and product management. Support from the technological side is needed to increase the pace of the MSME economy. One form of technology support is an inventory application that can help MSMEs in managing product stocks and supporting product marketing. Applications named Nawani and Nukoni can make it easier for MSME business players in marketing products. Nawani functions to market UMKM products and perform stock management, while Nukoni functions as a catalog for MSME products. Based on the test obtained using a Likert Scale, Nawani has a score of 78.8% for the Function Test and the UI / UX Test of 69.6%, while Nukoni has a score of 85.3% for the Function Test and the UI / UX Test for 70.2%, so that both applications are running and suitable for use by both parties.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 13; doi:10.28989/angkasa.v13i1.941
Flight planning is one of the essential factors of the airline operation. The selection of routes will determine the economic value of the flight. However, some conditions may prevent the flight to use the most optimum route due to airspace restriction or weather condition. The research aims to develop a search engine program that uses dynamic flight parameters that considers fusion of System Wide Information Management (SWIM) data including weather data and NOTAM to produce the most optimum route in 2D flight planning. The Dijkstra’s pathfinding is implemented in Python programming language to produce the flight plan. The navigation data used is enroute airway in Indonesian FIR regions. The scenario used is a flight from Jakarta to Makassar with duration of 2 hours flight with considering the effect of restricted airspace and weather blockage during in-flight. The study also uses the optimum route produced by the algorithm to be compared with the possible alternate routes to define how optimum the route is. Adding a restricted airspace parameter will result in a new optimum flight plan that able avoids the airspace and the most minimum distance. The effect of external wind parameter could influence the optimum route which may vary depends on the speed of the wind.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12; doi:10.28989/angkasa.v12i2.571
Motor has an important role in everyday life. Both are used on a home scale and in the industrial world. To regulate a motor, a good control system is needed. Laboratory Virtual Instrumentation Engineering Workbench abbreviated as LabVIEW is defined as a system engineering software that is used for the needs of testing, measuring, and controlling quickly on accessing hardware in which there is data needed. LabVIEW uses a graphics-based programming language or block diagram while other programming languages use a text base. This study aims to obtain a value of DC motor control. The method used in this research is to assemble the DC motor hardware with the driver followed by connecting it to a myRIO 1900 board controller. By providing variations in frequency and duty cycle, the results of current and voltage and rotation are obtained to determine its effect. The results of this study indicate that by giving a duty cycle of more than 50%, current and voltage are obtained and the motor rotation is linear and forms a horizontal line. The 100 Hz frequency is the best frequency that can produce the highest motor rotation. Keywords DC motor; control; LabVIEW References Artanto, D. (2017). Interface, Sensor, dan Aktuator Menggunakan Proteus, Arduino, dan LabVIEW. Yogyakarta: Deeppublish.Andrianto, S. (2016). Sistem Pengendali Kecepatan Putaran Motor DC Berdasarkan PWM berbasis Arduino Mega. Palembang: Politeknik Negeri Sriiwjaya.Arun, T. A., Arvin, S. K., & Madhukar, T. S. (2015). Microcontroller Based DC Motor Speed Control Using PWM Technique. Proceeding of The International Conference on Electrical, COmputer, and Telecomunication Engineering (ICECTE), (December 2012). Bangladesh.Katke S.P, R. S. . (2015). Speed Control of DC Motor Using Microcontroler. International Journal of Advanced Technology in Engineering and Science, 02(12), 6.Laksono, H. Di. (2015). Sistem Kendali dengan PID. Yogyakarta: Graha Ilmu.Soelaiman, B. H. (2014). Pengendalian Motor DC Menggunakan Pulse Width Modulation (PWM).Arifin, S., & Fathoni, A. (2014). Pemanfaatan Pulse Width Modulation untuk Mengantrol Motor (Studi Kasus Robot Otomatis Dua Deviana) DEVIANA ). Jurnal Ilmiah Teknologi Dan Informasi ASIA Malang, Stmik Asia Tinggi, Sekolah Informatika, Manajemen Malang, 8(2).Artanto, D. (2012). Interaksi Arduino dan LabVIEW. Jakarta: PT.Elex Media Komputindo.Baharuddin, Sadjad, R. S., & Tola, M. (2012). Sistem kendali Kecepatan Motor DC Berbasis PWM ( Pulse Width Modulation ). Universitas Hasanuddin.Ogata, K. (1997). Modern Control Engineering. New Jersey, USA: Prentice-Hall.Ogata, K. (1985). Teknik Kontrol Automatik (Sistem Pengaturan). Jakarta: PT Erlangga. http://dx.doi.org/10.28989/angkasa.v12i2.571 Refbacks There are currently no refbacks.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12, pp 37-42; doi:10.28989/angkasa.v12i2.539
Carbon blacks (CB), derived from agricultural waste, bamboo stem, coconut shells and oil palm empty fiber bunch, were obtained by pyrolysi used as filler in epoxy composites. The aim of this study was to identify the effect of biomass based carbon black on the tensile and impact strength carbon black – epoxy composite. In this research, carbon black was biomass based. The matrix was epoxy resin Bakelite EPR 174 and epoxy hardener versamid 140 while, the methodology for making the composite was hand lay-up method. The composite were made at 5, 10, 15, 20 volume percentage carbon black then the composite tested with the tensile and impact strength. The highest tensile strength was 44,65 MPa 5 volume percentage carbon black and the highest impact strength was 5.47 MPa volume percentage carbon black. While, based on the result of Scanning Electron Microscope (SEM) analysis showed there were agglomeration at the particle of carbon black, pull out, and void. Keywords composite, epoxy resin, carbon black, tensile strength, impact strength Full Text: PDF (Bahasa Indonesia) References Rizkyta, A. G., & Ardhyananta, H, “Pengaruh Penambahan Karbon terhadap Sifat Mekanik dan Konduktivitas Listrik Komposit Karbon/Epoksi Sebagai Pelat Bipolar Polimer Elektrolit Membran Sel Bahan Bakar (Polymer Exchange Membran (PEMFC))”, Jurnal Teknik ITS, 2(1), F36-F40, 2013 Cha, J., Jin, S., Shim, J. H., Park, C. S., Ryu, H. J., & Hong, S. H., “Functionalization of Carbon Nanotubes for Fabrication of CNT/Epoxy Nanocomposites”, Materials & Design, 95, 1-,2016 Sung, P. C., Chiu, T. H., & Chang, S. C, “Microwave curing of carbon nanotube/epoxy adhesives”, Composites science and technology, 104, 97-103, 2014 Guadagno, L., Vertuccio, L., Sorrentino, A., Raimondo, M., Naddeo, C., Vittoria, V., ... & Russo, S., “Mechanical and Barrier Properties of Epoxy Resin Filled With Multi-Walled Carbon Nanotubes”, Carbon, 47(10), 2419-2430, 2009 Wernik, J. M., & Meguid, S. A., “On The Mechanical Characterization Of Carbon Nanotube Reinforced Epoxy Adhesives”, Materials & Design, 59, 19-32, 2014 Khalil, H. A., Firoozian, P., Bakare, I. O., Akil, H. M., & Noor, A. M.,”Exploring Biomass Based Carbon Black As Filler In Epoxy Composites: Flexural And Thermal Properties”, Materials & Design, 31(7), 3419-3425, 2010 Leman, Z., Sapuan, S. M., Saifol, A. M., Maleque, M. A., & Ahmad, M. M. H. M., “Moisture Absorption Behavior Of Sugar Palm Fiber Reinforced Epoxy Composites”, Materials & Design, 29(8), 1666-1670, 2008 McIntyre, S., Kaltzakorta, I., Liggat, J. J., Pethrick, R. A., & Rhoney, I., “Influence Of The Epoxy Structure On The Physical Properties Of Epoxy Resin Nanocomposites”, Industrial & engineering chemistry research, 44(23), 8573-8579, 2005 Sui, G., Zhong, W. H., Liu, M. C., & Wu, P. H., “Enhancing Mechanical Properties Of An Epoxy Resin Using “Liquid Nano-Reinforcements””. Materials Science and Engineering: A, 512(1-2), 139-142, 2009 F. Nugroho, “Pengaruh Kandungan Partikel Serbuk Genteng Sokka Terhadap Kekuatan Tarik Dan Kekuatan Impak Pada Komposit Bermatriks Epoxy,” Conference SENATIK STT Adisutjipto Yogyakarta, vol. 3, Dec. 2017. http://dx.doi.org/10.28989/angkasa.v12i2.539 Refbacks There are currently no refbacks.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12; doi:10.28989/angkasa.v12i2.545
Fuselage is an airplane main body structure designed for accommodating the crew, passengers, and cargo. The fuselage of a modern aircraft is a semi-monocoque construction. Semi-monocoque structure is very efficient, it has a high strength to weight ratio, and it has design flexibility and can withstand local failure without total failure through load redistribution. One of the loading on fuselage is cabin pressure. In continuous operation airplane due to cabin pressure, damage often occur in the fuselage, for example on the stringer. Type of repair to deal with cases of damage to stringer needs to be analyzed. This study aims to determine the effect of angle thickness and fastener variations on the strength of repair stringer structure. The analysis stage by 3D modeling with CATIA software. Simulation of structural analysis in the form stress and calculating the Margin of Safety. The thicker of angle and the more number of fasteners in the web area and the flange used in the repair, the stress that occurs in each variation will decrease. Modeling the structure is safe against pressure loading. Keywords Strength of the Structure; Stringer; Repair; Margin of Safety References E. Bruhn, Analysis and design of Flight Vehicle Structures.Vasudev H, Rangaswamy H, Imran Ali MR. (2015). Structural Analysis and Material Optimization of Aircraft Fuselage, International Journal of Ignited Minds (IJIMIINDS), Vol. 2, Issue 5. Srilaxmi, Olem Prashanth Rao, Satyanarayana Gupta. (2016). Design and Static Stress Analysis of Fuselage Structure for a Military Transport Aircraft, International Journal & Magazine of Engineering, Technology, Management and Research (IJMETMR), Vol. 3, Issue 9. Prakash, Udaya R, et.al. (2016). Structural Analysis of Aircraft Fuselage Splice Joint, IOP Conference Series : Matrial Science ad Engineering. Shreennaga, Vishwash B, Mallikappa. (2017). Adaptive Design and Finite Element Analysis of Fuselage Floor Beam of an Aircraft, International Journal of Engineering Science & Management (IJESM). Dandekar, Aditya Milind, 2017. Finite Element Analysis of Composite Aircraft Fuselage Frame. Thesis. The University of Texas at Arlington. Saeed, Isaac N, 2017. An Investigation of Semi-Monocoque Aircraft Strutural Design with a Detailed Evaluation of Primary Structure Member Stability Criterion. Thesis. California State Polytechnic University. Boeing 737-300, Structure Repair Manual, Chapter 53-00-03. http://asm.matweb.com Niu, M.C.Y. (1997). Airframe Stress Analysis and Sizing (p.795). Hong Kong: Conmilit Press. http://dx.doi.org/10.28989/angkasa.v12i2.545 Refbacks There are currently no refbacks.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12, pp 9-18; doi:10.28989/angkasa.v12i2.673
Composite materials gain huge interest from researchers due to its advantages and flexibility. Strength and properties that can be adjusted based on the needs and applications is a specific advantage of composite materials. Since these advantages can be applied in many fields, composite materials often clustered in multifunctional materials. This study aims to lists and classified the progressive development of multifunctional composite materials that found and already proven can be applied in many applications. This study also gives data that can be driven to readers from different backgrounds and used it for further purposes. The results are shown that the progressive development of multifunctional composite materials not only one step forward in the technical achievements but also the energy and environment-related to human ecosystems.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12, pp 1-8; doi:10.28989/angkasa.v12i2.726
The first geothermal binary system in Indonesia that has successfully implemented is a 500kW binary system in Lahendong. Yet, there is still a plenty room of improvement for binary system development in Lahendong. This study aims to give an alternative design of the binary system by using an organic Rankine cycle. The investigations of thermodynamic analysis based on the law of thermodynamics, silica scaling analysis, and optimization of working fluid selection are presented. Flashing process from separator produces vapor and liquid-brine with mass flow rates 48.6 kg/s and 173.6 kg/s at separator pressure of 10.23 bar. Based on second law thermodynamics analysis, obtained the maximum useful energy from brine flow is 7.2MW. Based on the simulation results, it is achieved that the potential power generated by waste heat from the Lahendong plant is 2.46MW with the net thermal and exergy efficiency by 11% and 34%, respectively. Compared to the current operating binary system, still, much available energy needs to be harnessed in the future from the Lahendong plant.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12, pp 19-28; doi:10.28989/angkasa.v12i2.654
Mixing characteristics of gas-liquid co-current upward flow inside a vertical pipe equipped with a helical static mixer element were numerically investigated. The results from computational fluid dynamics (CFD) simulations with Euler-Euler model of three different length to diameter ratio (L/D) of the static mixer elements were compared. All simulated static mixers provide a better mixing condition in the comparison with the one without a static element. The sudden increase of rotational strength indicated by the liquid velocity curl was observed once the gas-liquid flows enter the static-mixer element zone. The smallest L/D static mixer provides the highest liquid velocity curl in the smallest axial distance providing the most effective mixing process among the tested elements. The best mixing characteristics shown by radial gas distribution was achieved with the static mixer with a smallest L/D.