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INDONESIA
Angkasa: Jurnal Ilmiah Bidang Teknologi
Published by Institut Teknologi Dirgantara Adisutjipto
ISSN : 20859503     EISSN : 25811355     DOI : 10.28989/angkasa
Core Subject : Science,
Computer Science & IT
Arjuna Subject : -
Articles 28 Documents
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Search results for , issue "Vol 8, No 2 (2016): November" : 28 Documents clear
VARIASI SUDUT PANCAR BURNER CUP UNTUK MENINGKATKAN PERFORMA PEMBAKARAN PADA KOMPOR BERBAHAN BAKAR BIOGAS MENUJU DESA MANDIRI ENERGI DI YOGYAKARTA Hariyanto, Kris; Mardwianta, Benedictus
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Biogas is an alternative energy sources as a substitute for fossil fuels in household activities daily, but there are obstacles in the use of biogas, namely the difficulty of arranging a flame that is stable and fuel consumption relatively less efficient biogas. So it takes a design development system that will produce a burning stove produces biogas-fueled stove fits the purpose of research, on the other hand biogas stove should be simple, cheap production price, maximum efficiency and safe to use. Stages in the study include: desk assessment, creation of objective requirements design, manufacture conceptual and basic design, manufacture real stove. As for knowing the performance of the stove carried stove performance tests are: test flame stability and efficiency. The results showed that the efficiency of the biogas stove design results in only 31 percent higher than the efficiency of biogas stoves old design, while the fuel consumption of biogas stoves new design is 16 percent lower when compared with fuel consumption of biogas stoves old design. In terms of manufacture and ease of repair and maintenance of gas cookers new design is more easily repaired and easy to make and simple in form compared with the old design biogas stoves.
ANALISIS KONEKTIVITAS JARINGAN TRANSPORTASI UDARA NASIONAL Gunawan, Gunawan; Medianto, Rully
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

The airport as flight network node is the starting point and the end of the movement of people/goods. The airport can also be a transit point before continuing the journey to the destination. The closure of the airport due to force majeure such as a disaster or terrorism may disrupt the national air transportation network. The effects of the closure of an airport to the national air transportation network depends on the level of connectivity of the airport. This study aimed to quantify the connectivity between two airports in the national air transportation network. Based on the connectivity data, it can be determined that appropriate mitigation strategies during an airport closure due to force majeure.
PERANCANGAN SISTEM STANDARISASI DESA WISATA KABUPATEN BANTUL DENGAN MODEL SISTEM PENGUKURAN KINERJA BALANCED SCORECARD GUNA PENGUATAN INDUSTRI PARIWISATA DAERAH Zabidi, Yasrin; Suhardiwamo, Suhardiwamo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Bantul regency until now has approximately 36 villages wisata. Standarisasi tourist village needs to be done, which is the standard tourist village which is categorized as an embryo, develops, and advanced. These standards can be used by Disbudpar to determine work programs such as mentoring programs, counseling, training for rural tourism in the category or the developing embryo. One standardized assessment instrument is the assessment of performance against a tourist village. Therefore, in this study, researchers are trying to design a system of standardization of the tourist village of Bantul model performance measurement system balanced scorecard that includes the identification of performance criteria, strategic objectives, determining indicators of performance, the determination method / means of performance measurement precise, systematic and easy to use, as well as the design of performance reporting. The design activity in this study is divided into four phases, namely: the initial phase of the study and formulation of the problem, the design phase, the phase of analysis and conclusion phase. Early research phase and the formulation of the problem include the formulation of the problem and determine the research objectives. Design phase includes the design process performance measurement system with Balanced Scorecard method which includes the establishment of strategic objectives, the establishment of performance indicators (key performance indicators / KPIs), target setting and action plans, draft worksheet performance measurement methods Omax and draft reporting of performance-based website. Phase analysis includes analysis of balanced scorecard performance measurement system that includes analysis perspective, the analysis of strategic objectives, KPI analysis and analysis of the strategy map. Phase conclusions include conclusions from the findings and suggestions. From the research performance based on four perspectives of the balanced scorecard, namely financial, customer, internal business processes, learning and growth. Strategic objectives that form there are 10 and there are 24 KPI KPI formed. Besides of this study the formation worksheet Omax performance measurement method, so that can know the value of each performance indicator of performance and total performance in a particular period.
MEMBANDINGKAN KINERJA MESIN BENSIN DUA LANGKAH SATU SILINDER PADA SEPEDA MOTOR MENGGUNAKAN VARIASI CAMPURAN BAHAN BAKAR MINYAK HASIL PROSES PIROLISIS SAMPAH PLASTIK DAN PREMIUM DENGAN PREMIUM MURNI Wardoyo, Wardoyo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

This research was aimed to know the performance of engine using variation of plastic waste pyrolysis and premium process result-gasoline fuel mix and pure premium and comparing with pure premium. The fuel mix variation used consisted of 20% plastic waste pyrolysis process result oil, 80% premium and 49%plastic waste pyrolysis process result oil, 60%premium. The research procedures included firstly the tested engine given pure premium fuel and the engine was run for 2-3 minutes by installing a transmission gear in 4th position, then rotation, torsion, power and specific fuel consumption was measured. Furthermore, the engine was stopped and the fuel was substituted with varied plastic waste pyrolysis process result oil mix, the engine was re-run. The measurement rotations, torsion, power and specific fuel construction was conducted by the same way with pure premium fuel testing. Out of test results for the same rotation of 5000-8000 engine RPM using fuel mix of 20% plastic waste pyrolysis process result oil the average power was 10.04 HP, average torsion of 11.10 Nm, specific fuel consumption of 0.100 kg/hour HP and engine using fuel mix of 40% plastic waste pyrolysis process result oil the average power was 9.7 HP, average torsion of 10.82 NM, specific fuel consumption o f 0.068 kg/hour HP. While using pure premium the average power was 9.8 HP, average torsion of 10.94 Nm, specific fuel consumption was 0.103 kg/hour HP. If compared, so that engine performance using fuel mix of 40% plastic waste pyrolysis process result oil and 60% premium almost approached engine performance using pure premium fuel and actually 20% fuel mix of plastic waste pyrolysis process result oil and 80% premium was better.
ANALISIS MIMO UNTUK PENINGKATAN KAPASITAS SISTEM SELULER 4G LTE PADA SISTEM KOMUNIKASI HIGH ALTITUDE PLATFORM STATION Waluyo, Catur Budi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

The development of technology has opened up a new wireless infrastructure to complement the satellite and terrestrial networks. High Altitude Platforms (HAPs) is a communications infrastructure that uses air balloon as a solution between terrestrial and satellite communications systems with medium coverage and low cost o f launching and maintenance. HAPs can be joined with a Long Term Evolution (LTE) technology standardized by the Third Generation Partnership Project (3GPP). LTE uses orthogonal frequency division multiplexing (OFDM) technology for downlink. OFDM technology is a technology that uses multicarrier and bring the data in parallel and the bandwidth is divided into several subcarrier. To improve the performance of LTE in an increase in capacity, coverage, and speed of data, then it can use MIMO techniques. MIMO is a technique using multiple antenna transmitter and receiver antennas that are used to overcome the problem of multipath fading and increase the capacity of the system to be serviced. MIMO support the achievement of high transmission speed. In the simulation, signals generated by the modified jakes model into a ricean channel using the K factor 1.41, 1.99, 2.33, 2.66, 4.61, 6.35, 9.21, 12.15, 16.77 dB with elevation angle of 1 0 ° to 90°. The larger the K factor, the smaller the shift doppler at each speed. Elevation angle have a relationship to the coverage area of HAPs, the smaller the elevation angle of the wider the coverage area, and the higher the position, the wider HAPs coverage area too. In ergodic capacity, the smaller the K factor, the smaller the elevation angle so that the capacity is also greater. System without estimation for the K factor o f 1.41dB and K 9.21dB is necessary for channel estimation and the Bit Error Rate (BER) o f the same system that made channel estimation has a better performance compared with the existing channel without estimation with the SNR improvement o f about 18 dB.
ANALISIS KECELAKAAN PENERBANGAN DI INDONESIA UNTUK PENINGKATAN KESELAMATAN PENERBANGAN Poerwanto, Eko; Mauidzoh, Uyuunul
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Achievement level of aviation safety can be achieved with the proper function of all components of the system in the aviation industry which consists of airport operators, airline operators, air traffic operators and aircraft maintenance operator, as well as the regulations set by the regulator. Every incident should be investigated aviation accidents to fin d the cause. This is to provide appropriate recommendations so that the same airline accident does not happen again. The increasing number of flights that are needed with safety guarantees. So it is importance to analyzed routine flight accident to improve the safety performance of airlines. This research is descriptive analysis with qualitative methods. Flight accidents data that have investigated from NTSC and DGCA grouped causes are then recommendations have been made by the NTSC also grouped for each operator stakeholders. Improved system of aviation safety in Indonesia can be done with a thorough analysis based on the results of investigation of NTSC whose recommendations have been given to all stakeholders in the aviation industry. The results showed that the causes of flight accidents in Indonesia is dominated by the human factor the percentage reached 60%. The highest number of the recommendations given by the NTSC to DGCA as many as 208 recommendations during the period 2007-2014 but the trend o f declining. On other side of the trend of the recommendations given to aviation operators showed an increase. This shows an increase in the duty on DGCA to always supervise, and set the standard flight operations carried out by several airline operators in Indonesia.
UJI BEDA PELANGGARAN TRAFFIC LIGHT BERDASARKAN LOKASI PELANGGARANNYA Ridayati, Ridayati
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

The increasing of the vehicles flow on Yogya-Solo street causing congestion at some points in the Klaten district. The main cause of the congestion is the number of traffic violations which lead to the accidents. Bendogantungan, south Klaten, is one of the most congested point in this district. This study is aimed to determine the causes and the effects of traffic light violations and to examine the difference o f traffic light violations based on the point of violations in the intersection of bendogantungan, Yogya-Solo street. The results show that the practical mind-set of Klaten community in driving has created an instant community. Many people of that community have not realized yet on the importance of traffic regulation, this causes the number of accident. The result of analysis using SPSS 15 shows that there is a significant difference between the one way traffic violation at Empu Sedah street and eastward of Yogya-Solo street. The difference also appears between the one way traffic violations at Empu Sedah street and the westward of Yogya-Solo street. It also happens between the right turn of Ki Ageng Pandanaran street and the westward of Yogya-Solo street.
FILTER ADAPTIF GPS PADA SISTEM DOWNLINK DATA Basukesti, Agus; Adiputra, Bangga Dirgantara
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

GPS (Global Positioning System) is a system used for navigation and positioning with the help of 32 satellites that orbit the earth. GPS satellites emit radio waves to activate the GPS receiver on the Earth to determine the exact location, speed and time for all weather conditions. Currently, GPS has a vital role in navigation drone. However GPS have a lot of noise, it is necessary to overcome the noise filter on the GPS. In this research conducted a simulation of adaptive algorithm in extracting data from the GPS sensor. The method in this research is the Kalman Filter. From the identification and simulation can be concluded that the adaptive algorithm is designed to work well and need to be implemented on the downlink system. The simulation results showed that the error of algorithm has convergent properties are increasingly shrinking.
PERANCANGAN DAN PEMBUATAN PROTOTYPE SHANK PROSTHESES KAKI BAGIAN BAWAH LUTUT Prakoso, Agung
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

The existence o f fe e t as the part of the human body is very important to support the daily activities which is to support the body and to walk. The lost of the under knee part (amputation) is the dominant case of the total cases of amputation in Indonesia. So that we need a tool to restore the balance of the human body to be able to do our daily activity. The tool is called prostheses. The design and manufacture of prototypeshank prostheses under knee is intended for persons who have 162 cm height and 57 Kg of average weight. Prostheses are aimed to the persons who only lost one limb below the knee. In this design, the length of the shank can be set according to the length of leg amputated and is intended to persons who are still experiencing high growth (teenager). The material is stainless steel 316L. The shank has a length 200-300 mm, width 67 mm and 2 mm thick.
ANALISIS KEKUATAN STRUKTUR REPAIR SKIN DOUBLER PESAWAT B737-300 Santoso, Djarot Wahju
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Fuselage is a structure of airplane as the location where the passengers and goods as well as to place the wing and other structures. Fuselage gets loading when the aircraft take off, flight maneuvers, landing and when at the ground. One is the pressure loading on the fuselage aircraft cabin. In continuous operation airplane due to cabin pressure damage such as cracks often occur in the fuselage. The use of skin doubler to handle cases mainly crack analysis is needed to see the effect doubler thickness and variations in fastener against the structure strength. In this study doubler skin structure modeling and analysis using software CATIA V5R21. Modeling structures made 4 types of structure to use variations of the number of fastener and three other structures to changes in the thickness of the doubler. The whole model is given tensile load and differential pressure. Use of doubler thicker in the repair structure will lower the stress that occurs at the doubler. The more number of rows of fastener used will decrease the stress on the fastener this happens to tensile load, but not effective enough for the load pressure differential. Modeling the structure is safe against tensile loading and internal pressure.

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