Angkasa: Jurnal Ilmiah Bidang Teknologi
ISSN / EISSN : 2085-9503 / 2581-1355
Current Publisher: SENATIK (10.28989)
Total articles ≅ 58
Latest articles in this journal
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; doi:10.28989/angkasa.v12i2.570
The development of small business is increasing with the presence of global competition. The current industrial ecology demands a continuous evaluation process to be able to survive and strive to improve quality products. Weeka Wedang Uwuh continuously improves its business system by paying attention to suppliers of raw materials. Supplier evaluation is carried out to guarantee sustainable quality and performance. Sustainable performance evaluation can produce good judgment if it is supported by a performance appraisal instrument. Supplier performance assessment will be useful to build a good and sustainable relationship between entrepreneurs and suppliers. The design of supplier performance evaluation is carried out using the QCDFR model approach namely, Quality, Cost, Delivery, Flexibility and Responsibility. The sub-criteria study that forms the QCDFR model is carried out using the interview method. QCDFR and Sub Criteria hereinafter referred to as KPI (Key Performance Indicator). KPI is an indicator of ongoing evaluation of the relationship between suppliers and entrepreneurs. The assessment of suppliers from entrepreneurs is carried out using the AHP approach which is able to show the weight of the entrepreneur's assessment of the ability of suppliers. The results of the Weeka Wedang Uwuh supplier performance evaluation model design results in a formulation to measure KPIs with criteria: quality of raw materials (size and condition of raw materials), ease of service (payment tolerance and information on availability and price changes, experience (average transaction value and average) average number of transactions), speed of response (changes in the amount and change in time and price of raw materials). Evaluation of the supplier's weight assessment for raw materials of ginger, sugar and sapphire resulted in the values of Mr. Sarno 0.501, Sugeng 0.709 and Mbak Wang 0.690. KPI measurement reinforces the results of the evaluation of weight assessment using AHP.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12, pp 29-36; doi:10.28989/angkasa.v12i2.663
Flight operation delays occur if there are delays both on the ground and in the airspace. It happened while the demand for air traffic exceeded the available capacity. The aim of the study is to analyse the airspace capacity based on Air Traffic Controller’s workload to support safety, expeditious, and orderly flow of air traffic which are the responsibility of the ATC. Primary data in this analysis were obtained by observing the activities conducted by ATC when delivering services to the airspace sector for 1 hour during peak hours within 30 days. The secondary detailed used to help the study relate to the amount of flight during peak hours, weather conditions, and flight plans. The analytical method used to determine the airspace capacity shall be the Pessimistic Sector Capacity. The result indicated a theoretical capacity of 31 aircraft per hour and practical capacity of 25 aircraft per hour with ATC personnel working time of 33 minutes being included in the heavy load category. Keywords Air Traffic Controller (ATC), Workload, Airspace Capacity, Pessimistic Sector Capacity Full Text: PDF (Bahasa Indonesia) References S. Ariesta and F. Sari, “Analisis Dampak On Time Performance ( OTP ) Pada Kegiatan Transportasi Udara ( Studi pada Keterlambatan Jadwal Penerbangan di Bandar Udara Internasional,” vol. 60, no. 2, pp. 169–178, 2018. C. Çetek and R. K. Çeçen, “En-Route Airspace Capacity And Traffic Flow Enhancement Using Genetic Algorithms,” Anadolu University Journal Of Science And Technology A - Applied Sciences and Engineering, vol. 18, no. 1, pp. 39–39, Mar. 2017. A. Majumdar and W. Y. Ochieng, “Factors Affecting Air Traffic Controller Workload: Multivariate Analysis Based on Simulation Modeling of Controller Workload,” Transportation Research Record: Journal of the Transportation Research Board, vol. 1788, no. 1, pp. 58–69, Jan. 2002. B. Számel, I. Mudra, and G. Szabó, “Applying Airspace Capacity Estimation Models to the Airspace of Hungary,” Periodica Polytechnica Transportation Engineering, vol. 43, no. 3, pp. 120–128, 2015. Kementerian Perhubungan, “Peraturan Direktur Jenderal Perhubungan Udara No. KP 265 Tahun 2017 Tentang Standar Teknis dan Operasi Bagian 170-03 (Manual of Standard CASR Part 170-03) Pedoman Penghitungan Kapasitas Ruang Udara dan Kapasitas Landas Pacu (Airspace Capacity and Runway Capacity)”, Jakarta: Kementerian Perhubungan, 2017 Airnav Indonesia, “Manual Perhitungan Kapasitas Ruang Udara”, Tangerang: Perum LPPNPI, 2015 International Civil Aviation Organization, “Fourth Workshop/ Meeting of the SAM Implementation Group (SAM/IG/4) Regional Project RLA/06/901”, South America: ICAO Regional Office, 2019 Eurocontrol Experimental Centre, “Pessimistic Sector Capacity Estimation EEC Note No.21/03”, Prancis: Eurocontrol,2003 Basuki, A.T.,and Nano, P., “Analisis Regresi dalam Penelitian Ekonomi dan Bisnis”, Jakarta: Raja Grafindo Persada, 2016 Ghozali, I., “Aplikasi Analisis Multivariat dengan Program SPSS”, Semarang: Badan Penerbit Universitas Diponegoro, 2005 Sugiyono, “Metode Penelitian Kuantitatif, Kualitatif dan R&D”, Bandung: Alfabeta, 2006 Airnav Indonesia, “Prosedur Operasi Standar Pelayanan Lalu Lintas Penerbangan”, Yogyakarta: Perum LPPNPI Cabang Yogyakarta, 2019 International Civil Aviation Organization, ”Doc.9426 Air Traffic Services Planning Manual”, Canada: ICAO,2005 http://dx.doi.org/10.28989/angkasa.v12i2.663 Refbacks There are currently no refbacks.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12; doi:10.28989/angkasa.v12i2.772
This research is a hydrogeological survey activity with the aim to determine the geological characteristics of groundwater in the Hargorejo area, Kokap Sub-district, West Progo. The study wants to know about the pattern of groundwater flow and water quality in the area. The northern part of the research area is included in the non-groundwater basin region of the West Progo Dome, while the southern part is included in Wates Groundwater Basin. Method of research is a field hydrogeological survey, to obtain geological and groundwater data. Groundwater flow pattern and quality analyses are based on groundwater data and pH, TDS and EC values. Groundwater can be obtained from springs or dug wells, with relatively shallow groundwater tables. The pattern of groundwater flow is generally to the south, with the H4 / H5 basin boundary type. Groundwater quality is quite good, with a pH value of 6.2 -7; TDS 191 - 558 ppm, and EC ranges from 279-783 µS / cm.
Angkasa: Jurnal Ilmiah Bidang Teknologi, Volume 12; doi:10.28989/angkasa.v12i2.773
Vibration testing of the head expander has been carried out. This test aims to determine the dynamic characteristics of the head expander that used in the Laboratory of Temperature and Vibration Testing, The Aeronautics Technology-LAPAN. The Head expander is used as a testing tool for the needs of large specimens. Validation of the head expander through this experimental method aims to determine the level of homogeneity of the head expanders. Retrieval of data using 4 accelerometers that are placed at each end of the head expanders. Sine sweep vibrations are given from 5 Hz to 2000 Hz with a constant amplitude of 1g and a sweep rate of 1 octave/minute. The test results show that the ends of the head expander have homogeneous properties with natural frequency values that do not differ much. Resonance occurs at a frequency of 900 Hz, 1300 Hz, 1600 Hz and 1900 Hz. The largest amplitude value at 11,76 g occurs at a frequency of 1900 Hz, so this head expander cannot be used for tests above 1900 Hz. Keywords Head expander; Test fixture; Natural frequency; Vibration; Accelerometer References E. De Barros and C. D. A. Souto, “Evaluation of a vibration text fixture,” Int. J. Acoust. Vib., 2017. H. S. Jeong and J. R. Cho, “Optimal design of head expander for a lightweight and high frequency vibration shaker,” Int. J. Precis. Eng. Manuf., 2016. S. Fábry and M. Češkovič, “Aircraft gas turbine engine vibration diagnostics,” MAD - Mag. Aviat. Dev., vol. 5, pp. 24–28, 2017. S. Kumar, N. Kumar, and R. Kumar, “Vibration Mapping of Head Expander for 9000 Kgf Shaker,” J. Emerg. Technol. Innov. Res., vol. 6, no. 6, pp. 280–284, 2019. A. Y. Zverev, “Noise control mechanisms of inside aircraft,” Acoust. Phys., vol. 62, no. No.4, pp. 478–482, 2016. H. Luo, C. Yu, T. Wu, and H. Wang, “Structure design and dynamic characteristic analysis of vibration fixture,” in Proceedings of 2018 IEEE International Conference on Mechatronics and Automation, ICMA 2018, 2018. W. X. Shen, W. S. Ma, and L. W. Zhang, “Research on the design of fixture for motor vibration test,” in IOP Conference Series: Materials Science and Engineering, 2018. Bruel&Kjaer, “Vibration Testing,” Denmark. E. Solution, Operating and Maintenance Manual (Medium Force Series). China, 2019. A. Parkinson, R. Armsond, D. Cooknell, J. Dixon, M. Keith, and R. Morgan, “Engineering Mechanics : Solids,” in Technology a second level course, 1.1., Yorkshire,: H. Charlesworth of Huddersfield, 1990, pp. 24–30. J. Dewanto, “Kajian Teoritik Sistem Peredam Getaran Satu Derajat Kebebasan,” J. Tek. Mesin, vol. 1, no. 2, pp. 156–162, 1999. http://dx.doi.org/10.28989/angkasa.v12i2.773 Refbacks There are currently no refbacks.
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.