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Contact Name
Yudhi Ardiyanto
Contact Email
yudhi.ardiyanto@umy.ac.id
Phone
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Journal Mail Official
ramadoni@umy.ac.id
Editorial Address
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Location
Kab. bantul,
Daerah istimewa yogyakarta
INDONESIA
Journal of Electrical Technology UMY
ISSN : 25501186     EISSN : 25806823     DOI : -
The Journal of Electrical Technology UMY (JET-UMY) is a peer-reviewed journal that publishes original theoretical and applied papers on all aspects of Electrical, Electronics, and Computer Engineering.
Arjuna Subject : -
Articles 22 Documents
Distribution Network Optimization Based on Genetic Algorithm Syahputra, Ramadoni
Journal of Electrical Technology UMY Vol 1, No 1 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

This paper presents a new robust optimization technique for distribution network configuration, which can be regarded as a modification of the recently developed genetic algorithm. The multi-objective genetic algorithm has been applied to this problem to optimize the total cost while simultaneously minimize the power loss and maximize the voltage profile. The IEEE 69-bus distribution network is used in the tests, and test results have shown that the algorithm can determine the set of optimal non- dominated solutions. It allows the utility to obtain the optimal configuration of the network to achieve the best system with the lowest cost. 
Human-Robot Interaction Based GUI Siregar, Rahmat Fauzi; Syahputra, Ramadoni; Mustar, Muhamad Yusvin
Journal of Electrical Technology UMY Vol 1, No 1 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

Nowadays, technological developments interactions in general, couldnt be separated from the rapid development of computer technology and human interaction. So that, supporting the user to be able to develop various models of interactions, especially the interactions between humans and robots. This study proposes a model of design and manufacture of human and robot interaction, in the form of a visual display on a computer controlling the robot motion. Object interaction in this study is using 4WD Smart Car Robot. Some of the tools used to build a robot control system at the time of interaction, including Netbeans IDE, based on JAVA and Arduino. The control algorithm is applied to build an optimal control system to model an interaction between humans and robots. Model of human interaction and robot is fully carried by the user in control of robot motion. The proposed interaction model can be implemented in real terms, in designing and making a model of human interaction and robot. 
The Application of Integrated Management Information Systems of Community Service Program in Universitas Muhammadiyah Yogyakarta Sudarsono, Yulia Ariska; Hayati, Nur; Adiprasetya, Rahmat; Dini, Agem Jaya
Journal of Electrical Technology UMY Vol 1, No 2 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

Community service program is a compulsory subject for all students in Universitas Muhammadiyah Yogyakarta (UMY). The existing information system of community service program in UMY is still run conventionally starting from registration system, group division and work area announcement. Meanwhile, students should come and ask directly to Office of Research, Publication, and Community Service to get all the information related to the program. This current system is complicated not only for students but also for officer who manage all data about community service program in UMY. Manually administered management cause frequent errors in invading data and takes a long time to complete the activity. Researchers initiated solution to overcome this problem by implement an application of management information system. This research has developed a web-based application that can be used to manage registration, personal data filling, and periodic scheduling for students whom take the community service program. Various parameters implementation as success determinant of system creation has been applied, so obtained a decent system used. The application is based on windows operating system that easily could be accessed through web interface. System testing has been done both from users (students) side and admin. the form of the webbased application developed has followed the standard manual form so that the system can work effectively and efficiently.
High Altitude Balloon Payload Design for Atmospheric Observations Wiyagi, Rama Okta; Danardono, .; Agus, Try Ahmad
Journal of Electrical Technology UMY Vol 1, No 1 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

In 2016, Microcontroller Research Group at Dept. of Electrical Engineering Universitas Muhammadiyah Yogykarta has designed and developed a payload for High Altitude Balloon. This payload has function measuring atmospheric parameter vertically and sending the data to ground station on earth using telemetry. The parameters measured are air pressure, temperature and relative humidity. Besides sending these parameters, payload also have mission monitoring real positions of payload using GPS, real time video transmission,regulary capturing and sending image from payload . This payload is tested on the annual Atmosphere Balloon Payload Competition (KOMBAT) 2016. This paper will describe the design payload, payload software algorithms and the results that have been obtained. 
Performance Comparison of HS-TCP and TCP in Hierarchical Mobile IPv6 Network Hayati, Nur; Putra, Mahesa Adhitya
Journal of Electrical Technology UMY Vol 1, No 1 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

Technology information has been growing rapidly in the last few years. HMIPv6 is one of environment used in mobility internet connection. One of transmission used in this method is Transmission Control Protocol (TCP). TCP has a normal connection that connect mobile node to the internet and has a normal speed of transmission. This paper tries to compare TCP with another protocol. High Speed Transmission Control Protocol (HS-TCP) is a transport protocol that introduces new method by improving general algorithm of TCP in reducing time of loss recovery. HS- TCP is compared with TC¬P to see the performance of each protocol. The simulation of these protocols is using Network Simulator 2.31 (NS-2.31). The topology of HMIPv6 concludes 1 Home Agent (HA), 2 Foreign Agent (FA), 1 Mobile Node (MN), 1 Correspondent Node (CN). The performance measurement is processed when MN moved from FA2 to FA1 while communicating with CN. Throughput of HMIPv6 will become the parameters for QoS. The result of the simulation shows that HS-TCP has a better performance than TCP by looking at the throughput which ran on the HMIPv6 topology. This simulation have proved that HS-TCP are suitable to be implemented in neighborhood supporting high speed. With bandwidth at 100 Mbps, we can see that HS- TCP is 32% better than HS-TCP, in 500 Mbps HS-TCP is better at 96% than TCP. In 1Gbps, HS-TCP is better at 85% than TCP and in 10Gbps, HS-TCP is better at 86% than TCP. 
Calculation of 20 kV Distribution Network Energy Losses and Minimizing Effort Using Network Reconfiguration in Region of PT PLN (Persero) UPJ Bantul Suripto, Slamet
Journal of Electrical Technology UMY Vol 1, No 2 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

Power distribution system is a component of an electric power system to deliver electrical energy from substation to customer location. In power distribution system, there are some power loss was changed as heat. Power distribution losses is a natural occurrence, so one gets to be done only minimize to support global energy efficiency. The way to reduce power loss in the power distribution system is by reconfiguration the existing line. Reconfiguration means a process of operating the switch (NO and NC) and change the topology line. Then, power loss in the power distribution system is computed with “ETAP” simulation software. From computing result of distribution network losses on existing line at PT. PLN UPJ. Bantul BNL 6, BNL 7 and BNL 11 feeders are gotten energy losses as 2,669,328 kWh per year or 1.72 %. Network reconfiguration that involves BNL 6, BNL 7 and BNL 11 feeder gets energy losses decrease by 1.00 % per year.
Interference Coordination Using Precoding Schemes for Indoor Hotspots Nugraha, Toha Ardi
Journal of Electrical Technology UMY Vol 1, No 1 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

This paper investigates an interference coordination method for indoor hotspot deployment which includes cooperative communication between access points. Coordination between indoor hotspots access point with a method of coordination strategy is used by using of multiple-input multiple-output (MIMO) antennas technique. In order to achieve the capacity, some preceding technique is implemented in MIMO such as Minimum Mean Square Error (MMSE) and Block Diagonalization (BD). MMSE and BD precoding is used to coordinate the transmissions across multiple antenna in transmitter and receiver in case of multiple antenna transmissions. Water-Filling (WF) power allocation is also implemented in this scheme. This schemes is proposed to mitigate inter user interference. Based on the simulation, the results show that coordination scheme in indoor hotspots deployment using BD pre-coding demonstrates a higher data rate than MMSE. The achievable sum rate of hotspot with coordination three access points using BD better around 5 Bps/Hz compared to MMSE method in the same cases. 
Development of User Interface Based on LabVIEW for Unmanned Aircraft Application Mujaahid, Faaris; Hizbullah, Amir Malik; Syahfitra, Febrian Dhimas; Dahlan, Muhammad Abduh; Juliansyah, Nugroho Dwi
Journal of Electrical Technology UMY Vol 1, No 2 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

This paper describes the user interface construction of rocket/aircraft condition monitoring systems on LabVIEW, a graphical-based programming language. The interface, placed in the ground station, has some important information transmitted from the rocket. The information contains real-time data from the sensor devices. The aim of the construction of this interface is that the operator in the ground station can monitor the behavior and the condition of the flying rocket, in regard to the self-control mechanism programmed within the rocket. The LabVIEW front panel includes the visualization of 3D rocket motion, accelerometer-graph, gyroscope-graph, rocket navigation, GPS positioning, altitude, and pressure-meter. The result proved that the data transmission was recorded properly to the front panel system and logbook. In addition to the result, the reliability test has 50% probability to the system performance with the given test period of 300 seconds and 600 seconds. The low reliability result might be caused by the size of buffer overflow between the hardware and LabVIEW.
Reliability Analysis of Power Distribution System Ali, Khaidir; Wiyagi, Rama Okta; Syahputra, Ramadoni
Journal of Electrical Technology UMY Vol 1, No 2 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

Electrical distribution system is a component of electrical power system that is very important because it is closest to the customer. In its operation, the distribution system often suffers that causes the flow of electricity to the customer is interrupted. This situation is not expected by customers or by electric power companies. The more frequent and longer the occurrence of electrical power flow interruption, the lower the system reliability, and vice versa. Reliability of a distribution system can be analyzed based on SAIDI and SAIFI parameters. In this research, reliability analysis of distribution system on Gejayan substation. The analysis result using SAIDI and SAIFI parameters shows that Gejayan substation is reliable enough to national standard, while based on international standard still not reliable.
Analysis of Finite Source Traffic Model of Wireless LAN: A Case Study Surahmat, Indar; Manggala, Satrya Try
Journal of Electrical Technology UMY Vol 1, No 1 (2017)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

Investigating characteristics of users and their pattern to access networks are parts of important points in traffic engineering. In this paper, those problems, specifically in wireless LAN, were observed and some related theories were explored. The observation was done in UMY, a campus located in Yogyakarta, Indonesia. In this term, we examined the traffic in an Wireless Action Point. Resuming the content of this paper, we found that the traffic had unique characteristics. For instance, during the day of measurement, the peaks of traffic were in the morning and in the afternoon. Average connected clients in all action points in UMY was between 2500 and 3000 users. When we selected an AP, the characteristic of the AP was examined, the number data size are 62.99 MB and 129.22 MB for mean and standard deviation respectively. We found that hourly trend of the usage of APs resembled self-similar model. 

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