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Angkasa: Jurnal Ilmiah Bidang Teknologi

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Published by Institut Teknologi Dirgantara Adisutjipto

ISSN : 20859503 EISSN : 25811355 DOI : 10.28989/angkasa

Core Subject : Science,

Computer Science & IT

Arjuna Subject : -

Articles 350 Documents

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DC Motor Control Using Laboratory Virtual Instrumentation Engineering Workbench Bustanul Arifin; Eka Nuryanto Budisusila
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

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.

Design of The Performance Evaluation of Suppliers at UKM Weedang Uwuh Based on Multi Attribute Decision Making (MADM) Marni Astuti; Riani Nurdin
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

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.

The Progressive Development Of Multifunctional Composite Materials In Different Applications Muhammad Akhsin Muflikhun
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

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.

Optimizing the utilization of third runway in Soekarno Hatta International Airport using time space analysis Hans Valiancius Ongkowijoyo; Neno Ruseno
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 13, No 1 (2021): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

The aim of this research is to optimise the utilization of third runway in Soekarno Hatta International Airport by giving recommendation based on calculation and simulation of runway capacity. The flight schedule data in Soekarno-Hatta International Airport was taken from flightradar24.com for duration of 1- 6 January 2020. The calculation of the runway capacity uses time space analysis method and simulation in BlueSky ATM Simulator. The highest runway capacity of 44 flights per hour is reached when the runway operates as take-off only or landing-only configuration. The simulation is conducted for 3 scenarios: 2 runways configuration, 3 runways configuration and 3 runways configuration with modification. The log data of simulation is analysed using Python programming to know the separation for every pair of flights and ensured that the minima distance due to wake turbulence is fulfilled. The recommendations are runway 07L/25R and 06/24 operates as segregated parallel operation by installing ILS on runway 06/24, extending NP2 and NP3 taxiway for increasing the capacity and reducing the runway incident probability. The results from extending the taxiway are the operation of runway 06/24 will not disturb runway 07L/25R operation, the runway capacity will increase by 60%, and the utilization of third runway will increase by 55%.

KOMPARASI PERFORMA JARINGAN ANTARA PENYEDIA LAYANAN SELULER 4G LTE DI AREA KOTA YOGYAKARTA Ari Sugiharto; Ikrima Alfi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 1 (2019): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Teknologi telekomunikasi seluler telah berkembang ke generasi keempat, yaitu jaringan 4G. Meskipun hampir semua operator penyedia layanan telekomunikasi seluler telah menyatakan bahwa mereka siap dengan jaringan 4G, pada kenyataannya, tidak semua area di kota Yogyakarta tercakup oleh layanan jaringan 4G. Kondisi ini dikeluhkan oleh banyak pengguna. Kinerja jaringan 4G di wilayah Yogyakarta perlu ditelusuri lebih lanjut sehingga pemanfaatannya lebih optimal dan tidak mengecewakan pengguna jaringan. Penelitian ini menganalisis kinerja jaringan 4G LTE dari berbagai operator layanan telepon seluler di wilayah Kota Yogyakarta, diwakili oleh dua operator. Parameter kinerja yang diukur adalah Daya Sinyal Referensi yang Diterima (RSRP) dan Kualitas Referensi Sinyal yang Diterima (RSRQ). Dalam studi ini tes drive dilakukan untuk menentukan kualitas sinyal seluler di berbagai daerah yang mewakili daerah perkotaan, suburban dan perkotaan padat di kota Yogyakarta. Dari hasil pengukuran tes drive, kesimpulan dari hasil tes untuk operator A, RSRP nilai maks -57dBm, RSRP min -117 dBm, RSRP rata-rata -85.35dBm, RSRQ max -4 dBm, RSRQ min -23 dBm, dan RSRQ rata-rata -13,02 dBm. Sedangkan untuk operator B diperoleh nilai maks RSRP -51 dBm, RSRP min -105 dBm, RSRP rata-rata 76,92 dBm, RSRQ max -4 dBm, RSRQ min -21 dBm, dan RSRQ rata-rata -8,94 dBm.

Cargo optimization in an airline using agent based modelling Rizky Arden; Neno Ruseno; Yuda Arif Hidayat
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 13, No 1 (2021): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

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.

Analysis of Engine and Propeller Selection for Unmanned Aircraft LSU-05 NG Novita Atmasari; Muksin Muksin; Hartono Hartono; Ryan Hidayat
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

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.

Mixing Characteristics Of Gas-Liquid Flow In A Static Mixer: A Numerical Study Ryan Anugrah Putra
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

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.

Body of Knowledge in Research of Air Traffic Management: Case Study in Indonesia Neno Ruseno; Mahardi Sadono
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 11, No 1 (2019): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Air Traffic Management (ATM) is a discipline that manages the movement of flights in the air and on the ground. Its functions are to maintain the safety level required by the authority and to provide the capacity required by the airlines. The challenges in ATM come from the in-balance between the market growth and the available infrastructure and also the gap between the regulations and the technology. The research in ATM provides the solutions by introducing new methods or technologies to cope with those challenges. The effort in organizing and cataloging the Body of Knowledge (BOK) in research of ATM is presented in this report. This BOK is a complete set of research concepts and activities in term of managing the air traffic to improve the air transportation safety and its capacity. Considering the latest publications in the last 5 years, the BOK consists of five areas of operation which are enroute, arrival, terminal, departure and connectivity. Each area of operations consists of several knowledge units that contain several research topics. In this report, a special attention is given to the development of ATM research in Indonesian. It characterizes with the challenges that commonly faced in Indonesia such as high density air traffic, in-sufficient infrastructure/technology, in-balance demand and supply during peak hours and major disruption by natural disasters (volcanoes and earth quakes).The report summarizes that the trend of ATM research in Indonesia is in the knowledge unit of capacity optimization. Additionally, it recommends to explore research activities by implementing new air traffic concepts such as the trajectory based operation and the integrated of departure and arrival management to improve capacity, efficiency and safety.

Nawani and nukoni applications for supporting small and medium micro enterprises in Gunung Kidul district Asih Pujiastuti; Astika Ayuningtyas; Anggraini Kusumaningrum; Adetya Dyas Saputra
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 13, No 1 (2021): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

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.

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