Articles
12 Documents
Search results for
, issue
"Vol 12, No 2 (2020): November"
:
12 Documents
clear
<![CDATA[DC Motor Control Using Laboratory Virtual Instrumentation Engineering Workbench ]]>
<![CDATA[Bustanul Arifin]]>;
<![CDATA[Eka Nuryanto Budisusila]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (297.984 KB)
|
DOI: 10.28989/angkasa.v12i2.571
<![CDATA[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.]]>
<![CDATA[Design of The Performance Evaluation of Suppliers at UKM Weedang Uwuh Based on Multi Attribute Decision Making (MADM) ]]>
<![CDATA[Marni Astuti]]>;
<![CDATA[Riani Nurdin]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (421.864 KB)
|
DOI: 10.28989/angkasa.v12i2.570
<![CDATA[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.]]>
<![CDATA[The Progressive Development Of Multifunctional Composite Materials In Different Applications ]]>
<![CDATA[Muhammad Akhsin Muflikhun]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (769.898 KB)
|
DOI: 10.28989/angkasa.v12i2.673
<![CDATA[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.]]>
<![CDATA[Analysis of Engine and Propeller Selection for Unmanned Aircraft LSU-05 NG ]]>
<![CDATA[Novita Atmasari]]>;
<![CDATA[Muksin Muksin]]>;
<![CDATA[Hartono Hartono]]>;
<![CDATA[Ryan Hidayat]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (854.731 KB)
|
DOI: 10.28989/angkasa.v12i2.762
<![CDATA[This research focuses on analyzing the selection of engine and propeller for the propulsion system of LSU-05 NG by calculating the aircraft power needs. The aircraft power is evaluated in two loading conditions, namely heavy loading with regard to minimum take-off speed and light loading with regard to maximum cruise speed. Furthermore, from the five engine recommendations available, propeller rotation efficiency, thrust generated, and engine weight that meets the aircraft DRO (Design Requirment and Objective) are analyzed. The results of this research provide recommendations for using an engine with a minimum power of 16.5 hp with the main candidate is DLE 170 and a 32x10 size propeller as the LSU-05 NG propulsion system.]]>
<![CDATA[Mixing Characteristics Of Gas-Liquid Flow In A Static Mixer: A Numerical Study ]]>
<![CDATA[Ryan Anugrah Putra]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (1619.729 KB)
|
DOI: 10.28989/angkasa.v12i2.654
<![CDATA[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.]]>
<![CDATA[Dynamical Characteristics Of A Head Expander For Vibration Testing In Pustekbang Laboratory ]]>
<![CDATA[Nur Mufidatul Ula]]>;
<![CDATA[Yusuf Giri Wijaya]]>;
<![CDATA[Muksin Muksin]]>;
<![CDATA[Mikhael Gilang Pribadi Putra Pratama]]>;
<![CDATA[Agus Harno Nurdin Syah]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (1497.426 KB)
|
DOI: 10.28989/angkasa.v12i2.773
<![CDATA[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.]]>
<![CDATA[Airspace Capacity Analysis of Adisutjipto Airport ]]>
<![CDATA[Aprinia Kusumaningsih]]>;
<![CDATA[Dewanti Dewanti]]>;
<![CDATA[Imam Muthohar]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (956.828 KB)
|
DOI: 10.28989/angkasa.v12i2.663
<![CDATA[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.]]>
<![CDATA[Hydrogeology Potential of Hargorejo Area Kokap Subdistrict West Progo Regency ]]>
<![CDATA[T. Listyani R.A.]]>;
<![CDATA[Dianto Isnawan]]>;
<![CDATA[Ign. Adi Prabowo]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (1218.302 KB)
|
DOI: 10.28989/angkasa.v12i2.772
<![CDATA[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.]]>
<![CDATA[Influence of Biomass Based Carbon Black as Filler Composite on Tensile and Impact Strength ]]>
<![CDATA[Nurfi Ahmadi]]>;
<![CDATA[Fajar Nugroho]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (669.448 KB)
|
DOI: 10.28989/angkasa.v12i2.539
<![CDATA[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.]]>
<![CDATA[Strength Analysis on Airplane Fuselage Structure Stringer ]]>
<![CDATA[Dwi Hartini]]>
<![CDATA[ Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November ]]>
Publisher : <![CDATA[Institut Teknologi Dirgantara Adisutjipto ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (1120.449 KB)
|
DOI: 10.28989/angkasa.v12i2.545
<![CDATA[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. Â 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.]]>
