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Transmisi: Jurnal Ilmiah Teknik Elektro
Published by Universitas Diponegoro
ISSN : -     EISSN : 24076422     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol 14, No 2 (2012): TRANSMISI" : 6 Documents clear
Pemodelan dan Simulasi Mobile Robot - 3 Trailers dengan Kendali PID Sinuraya, Enda Wista
Transmisi Vol 14, No 2 (2012): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.357 KB) | DOI: 10.12777/transmisi.14.2.56-60

Abstract

The mobile robot and trailer model presents a classic challenge in the field of control theory. Trailers, on the other hand, have been developed and widely used in the industry. The main focus of industrial design is set on reducing tracking error from a reference trajectory. We develop a design theory of trailer systems with passive steering and the steering wheel’s angle . From simulation result, The mobile robot with proportional controller shows good result in following the required trajectory. Keywords : mobile robot and trailer, trajectory, passive steering, proportional controller
Estimated Energy Consumption Of Electricity At APJ Cilacap In 2011-2016 Using Leap Software Pradana, AP Hendra; Windarto, Joko; Winardi, Bambang
Transmisi Vol 14, No 2 (2012): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.162 KB) | DOI: 10.12777/transmisi.14.2.61-67

Abstract

Electrical system in the Central Java Province is managed by PT PLN (Persero). The Electrical energy distribution is carried by the APJ (Service Area Network). One of APJ operating in the Central Java Province is APJ Cilacap, APJ Cilacap which is responsible to fulfill the electricity needs in the District of Cilacap and Kebumen. It makes APJ Cilacap as manager of the utility company should be able to provide the energy needs of electricity in both area. In addition of electrical energy demand’s problem, the problems belong to SAIDI, SAIFI and line losses also becomes a problem of electrical energy distribution. Therefore, it needs to have the electrical energy planning so that energy needs, SAIDI, SAIFI and line losses can be known for the following years. In Preparation of Planning estimates that the software used are LEAP (Long Range Energy Planning System) version 2008.0.0.96. In Planning Making using two scenarios namely BAU (Base As Usual) is the result of scenario planning is still the same trend with the growth of base year or there is no policy affected and RPTL PLN which is based on RUPTL PLN (General Planning of Electricity Supply) in period 2012-2016. From the results of planning using LEAP, projected electricity supply, BAU scenario growth in electrical energy consumption, has the average value of customers equal to the Household sector in UPJ Cilacap, Majenang, Sidareja, and Kroya that is 0.41% per year, while the commercial sector, Industrial, and General are 5.39%, 2.33%, 4.60% per year, while UPJ Kebumen and Kroya for each sector 0, 51%, 4.27%, 7.40%, 4.48% per year. While the projections for electricity supply, outage rate index (SAIDI SAIFI), and losses, RPTL PLN scenario of electricity energy consumption growth follows a policy document RUPTL PLN year 2009-2019. Policy scenarios in RPTL PLN where the electrical energy consumption projections estimates the population growth of 0.3% per year, PDRB growth of 4.5% -5.83% per year, Electrification Ratio in 2019 is targeted at 97.5%, and 4.99% growth in connected power per year. For Policy in making electric energy losses in 2019 is targeted at 5.65%. While in making target of outage Index (SAIDI SAIFI) predicted value of SAIDI in the year 2019 at 77,44 minute/consument/years and the value of SAIFI in 2019 by 4,4 times /consument/years. Keyword : Electricity, SAIDI SAIFI, Energy losses, Planning, LEAP
Unjuk Kerja Isolator 20 kV Bahan Resin Epoksi Silane Silika Kondisi Basah dan Kering Syakur, Abdul; Yuningtyastuti, Yuningtyastuti; Setiaji, M. Ervan Dwi; Aprianto, Agung
Transmisi Vol 14, No 2 (2012): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (283.072 KB) | DOI: 10.12777/transmisi.14.2.68-72

Abstract

Salah satu peralatan listrik yang penting dalam sistem tenaga listrik adalah isolator yang berfungsi sebagai penyangga kawat saluran udara, sekaligus secara elektris sebagai penyekat (isolasi) antara konduktor bertegangan dengan menara (tower) transmisi. Isolator dengan bahan keramik, porselen dan kaca sudah digunakan secara luas. Saat ini sedang dikembangkan isolator dengan bahan polimer antara lain silicon rubber dan resin epoksi. Faktor lingkungan seperti kelembaban, temperature, hujan, dan kontaminan memiliki pengaruh signifikan terhadap unjuk kerja isolator. Terutama pada saat kondisi basah, permukaan isolator akan mudah mengalirkan sehingga terjadi pemanasan pada bagian permukaan dan akibatnya dapat menyebabkan flashover. Makalah ini melaporkan hasil penelitian mengenai unjuk kerja isolator 20 kV yang terbuat dari bahan resin epoksi silane silica. Pengujian dilakukan di laboratorium dalam kondisi basah dan kondisi kering. Parameter unjuk kerja isolator yang diamati adalah sudut kontak, arus bocor, dan tegangan flashover. Parameter hasil pengukuran digunakan untuk membandingkan dan menganalisa sudut kontak, arus bocor, tegangan flashover yang terjadi pada permukaan isolator kondisi basah dan kondisi kering. Hasil pengujian dan analisa menunjukkan bahwa nilai tegangan flashover kondisi basah lebih kecil daripada saat kondisi kering dan arus bocor pada kondisi basah lebih besar daripada saat kondisi kering. Tegangan flashover isolator kondisi basah adalah 60,688 kV; dan pada tegangan terapan 18,64 kV diperoleh nilai arus bocor 103,207 μA. Sementara tegangan flashover pada kondisi kering diperoleh 111,320 kV dan nilai arus bocor 42,701 μA. Sudut kontak permukaan isolator diperoleh nilai 66,1180 - 74,7170 yang dapat dikategorikan bersifat partially wetted (basah sebagian). Kata kunci: Tegangan flashover, sudut kontak, resin epoksi, isolator 20 kV, arus bocor
Sistem Navigasi untuk Individu Pejalan Kaki Berbasis Prinsip Dead Reckoning Setiawan, Iwan; Setiyono, Budi; Kawuri, Laras Dwi
Transmisi Vol 14, No 2 (2012): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (488.247 KB) | DOI: 10.12777/transmisi.14.2.42-47

Abstract

 This paper discusses a pedestrian navigation system based on the principle of dead reckoning. Early prototype of the system has been developed using only two internal sensors of MEMS accelerometer and electronic compass that is worn over the shoes of the individual. Functionally, accelerometer in this system is used to detect the two state individual legs as walking: stance and swing state, while the electronic compass are functionally used to estimate the direction of individual pedestrian step. Based on initial testing, the navigation system that developed capable of detecting individual steps that are normal walking with 100% success rate, whereas the electronic compass readout accuracy is still room for improvement. Keyword : Navigation, Positioning, Dead Reckoning, Pedestrian, Accelerometer, Electronic Compass
Rancang Bangun Transmitter Gigabit WLAN Wahyul Amien Syafei; Imam Santoso; Hayu Pratista
Transmisi: Jurnal Ilmiah Teknik Elektro Vol 14, No 2 (2012): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.241 KB) | DOI: 10.12777/transmisi.14.2.73-77

Abstract

Wireless LAN is wireless technology that can be used for voice and data communication. The increase of user requirement in Wireless LAN system caused the development of Wireless LAN increasing too. Standard of Wireless LAN is IEEE802.11a/b/g and IEEE802.11n use OFDM and MIMO technique for increase data rate without additional bandwidth. The purpose of this final project is to design physical layer of transmitter wireless LAN system to obtain gigabit throughput. Wireless LAN that we used now can produce rate up to 600 Mbps. So we expect this design of wireless system can increase data rate into gigabit throughput. The design of this system organized from arrangement of block diagram into preamble and data field. The data field, same as the previous standard, 802.11n consists of block scrambler, encoder parser, FEC encoder, interleaving, constellation mapper, spatial mapper, IFFT, cyclic shift, guard interval inserter and windowing. Whereas the preamble consists of legacy preamble is L-STF, L-LTF and L-SIG that have same format with previous standard in order to the output of transmitter 802.11ac can be compatible to 802.11a/n. Then, very high throughput preamble is added to this system as a preamble for 802.11ac. From the experiment result, we get the conclusion that wireless LAN 802.11ac is formed based on the previous standard 802.11a and 802.11n which have same frequency 5 GHz. Then, for 802.11ac we duplicate bandwidth from 40 MHz to 80 MHz and apply phase rotation. For the software verification backward compatibility, we determine the parameters 100 iteration, use MCS (Modulation Coding Scheme) 64-QAM and 4 transmit antenna. As the result the 802.11ac transmitter can be recognized by 802.11a/n receiver and it can be shown as decreasing of SIG Error rate for SNR range 0-20 dB. Key words : Wireless LAN, IEEE802.11a/n, Gigabit throughput, Backward compatibility
Desain Sistem Kendali pada Ulisar (UUV) Unmanned Underwater Vehicle Rachim, Vega Pradana; Triwiyatno, Aris; Setiyono, Budi
Transmisi Vol 14, No 2 (2012): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.765 KB) | DOI: 10.12777/transmisi.14.2.48-55

Abstract

Unmanned Underwater Vehicle (UUV) is one of the systems that have a complex characteristic. UUV usually used to obtain data, mapping and underwater survey. One of a complexity that UUV have is based onuncertainty and non-linearity of hydrodynamics parameter. Besides that, UUV which studied in this paper have 6 degree of freedom, so it has also a lot parameter. And to handle that, a bigger system need to divide into some sub-system, the divided is based on control needed. To handle a movement of UUV, it’s important to build a control system that effective and efficient and a writer choose PID and Sliding-PID (SMC-PID) as a controller Modeling system used to linearize a non-linier system from UUV, linearizing around the equilibrium point. Then make a model into a state space, these state space uses for a controlling. For a control system building and respond system from an UUV movement, MATLAB program is needed Keywords: UUV, PID control, Sliding-PID, MATLAB Simulink, Linier System

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