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ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika
Published by Institut Teknologi Nasional Bandung
ISSN : 23388323     EISSN : 24599638     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering Engineering
Jurnal ELKOMIKA diterbitkan 3 (tiga) kali dalam satu tahun pada bulan Januari, Mei dan September. Jurnal ini berisi tulisan yang diangkat dari hasil penelitian dan kajian analisis di bidang ilmu pengetahuan dan teknologi, khususnya pada Teknik Energi Elektrik, Teknik Telekomunikasi, dan Teknik Elektronika.
Arjuna Subject : -
Articles 16 Documents
 1   2 
Search results for , issue "Vol 7, No 2: Published May 2019" : 16 Documents clear
Penyisipan Citra pada Audio dengan Kode PN Terdistribusi Gaussian BUDIMAN, GELAR; AULIA, SUCI; RAMATRYANA, I NYOMAN APRAZ
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2: Published May 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.209

Abstract

ABSTRAKPada makalah ini, perancangan audio watermarking memanfaatkan kode PN yang terdistribusi Gaussian atau Normal dengan menggunakan citra sebagai watermark yang disisipkan pada audio. Watermark yang berupa citra biner diubah ke dalam vektor 1 dimensi, kemudian dijumlahkan dengan kode PN terdistribusi normal yang disaring dengan filter psikoakustik. Setelah itu, sinyal dikalikan dengan faktor gain α sebelum dijumlahkan dengan host audio untuk mendapatkan watermarked audio. Hasil dari simulasi menunjukkan bahwa sistem memiliki kapasitas watermark yang tinggi pada 689.06 bps, imperseptibilitas yang baik pada SNR>26 dB, dan tahan terhadap serangan LPF mulai frekuensi cut off 6 kHz keatas, serangan Additive Noise mulai 40 dB keatas, resampling pada rate 16 kHz, LSC 1% - 10%, dan kompresi MP3 untuk rate 192 kbps.Kata kunci: Audio Watermarking, Kode PN, distribusi normal, filter sikoakustik ABSTRACTIn this paper, the design of audio watermarking utilizes PN code that is Gaussian or Normal distributed by using the image as a watermark inserted in the audio. The watermark in the form of binary images is converted into a 1-dimensional vector, then summed up with a normally distributed PN code filtered by a psychoacoustic filter. After that, the signal is multiplied by α gain factor before adding it to the audio host to get the watermarked audio. The result of the simulation shows that the system has a high watermark capacity at 689.06 bps, good imperceptibility at SNR> 26 dB, and withstand LPF attacks starting from 6 kHz cut-off frequency and above, Additive Noise attacks from 40 dB up, resampling at 16 kHz , LSC 1% - 10%, and MP3 compression for 192 kbps rate.Keywords: Audio Watermarking, PN code, normal distribution, psychoacoustic filter
Optimalisasi Sistem Mikrogrid Hibrida Berbasis Jarak Pagar menggunakan HOMER IBRAHIM, IBRAHIM; RUSIRAWAN, DANI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2: Published May 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.268

Abstract

ABSTRAKPenggunaan genset diesel minyak solar untuk kelistrikan di pulau Medang terkendala dengan mahal dan tingginya biaya pengadaan minyak solar. Biomassa jarak pagar yang ada di pulau Medang potensial untuk dimanfaatkan sebagai sumber daya alam (SDA) lokal, untuk menggantikan minyak solar sebagai bahan bakar genset. Bahan bakar yang dapat dihasilkan dari buah jarak pagar terdiri dari straight vegetable oil (SVO), biogas dan synthetic gas (syngas). Berdasarkan data sekunder, 1 ha kebun jarak pagar dapat menghasilkan listrik 19.425 kWh/tahun menggunakan genset diesel berbahan bakar SVO ditambah 6.475 kWh/tahun menggunakan genset biogas. Dalam penelitian ini, optimalisasi sistem mikrogrid hibrida berbasis jarak pagar sudah dilakukan. Kondisi optimal untuk beban rata-rata 4.000 kWh/hari terdiri dari 1X360 kW genset SVO + 1X360 kW genset Biogas + Baterai 300 kWh + inverter-rectifier 300 kW. Hasil evaluasi memperlihatkan untuk operasi 25 tahun, sistem mikrogrid hibrida berbasis biomassa jarak pagar membutuhkan net present cost (NPC) sebesar $7.750.000 dan memberikan cost of energy (COE) $0,368/kWh.Kata kunci: genset, bioenergi, SVO, biogas, listrik ABSTRACTUtilization of diesel oil for diesel generators in the Medang island is constrained by high costs of diesel oil. The jatropha (type of biomass) in the Medang island can be used as a local natural resource (SDA), in substituting of diesel oil as a generator fuel. The type of fuel whics is produced by jatropha consist of straight vegatable oil (SVO), biogas and synthetic gas (syngas). Based on secondary data, it is found that 1 ha of Jatropha equal by produces electricity 19.425 kWh/year using an SVO diesel generator set and 6.475 kWh/year using biogas generator set. In this study, optimization of the hybrid microgrid system was carried out. The optimal conditions for an average 4,000 kWh/day of load is consisting of 1X360 kW SVO generator + 1X360 kW Biogas generator + 300 kWh + 300 kW rectifier inverter. Evaluation results showed that for 25-year operation, the hybrid microgrid jatophra bases system requires of NPC of $ 7,750,000 and yield the COE of $ 0.368/kWh.Keywords: genset, bioenergy, SVO, biogas, electricity
Indeks Subjeks dan Indeks Pengarang -, - INDEKS
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2: Published May 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.%p

Abstract

Indeks Subjeks dan Indeks Pengarang
Robot Inverted Pendulum Beroda Dua (IPBD) dengan Kendali Linear Quadratic Regulator (LQR) FAHMIZAL, FAHMIZAL; ARROFIQ, MUHAMMAD; ADRIAN, RONALD; MAYUB, AFRIZAL
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2: Published May 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.224

Abstract

ABSTRAKMakalah ini memaparkan proses pemodelan robot inverted pendulum beroda dua (IPBD) menggunakan dinamika Lagrange. Setelah sistem model robot IPBD diperoleh, teknik kendali optimal dalam hal ini menggunakan linear quadratic regulator (LQR) digunakan untuk melihat step respon sistem dan tanggapan respon sistem terhadap gangguan. Sebelum kendali LQR diimplementasikan, simulasi menggunakan Simulink Matlab dilakukan untuk mendapat parameter gain K pada kendali LQR. Selanjutnya, dengan mengubah-ubah matriks pembobot Q akan diperoleh variasi gain K. Pada penelitian ini dilakukan variasi matriks pembobotan Q sebanyak lima jenis. Sedangkan matriks elemen R dituning dengan nilai satu. Dari hasil pengujian diperoleh bahwa dengan membesarkan pembobotan matriks Q, dihasilkan respon menuju keadaan steady lebih cepat dan overshoot berkurang. Parameter gain K dari hasil simulasi selanjutnya akan diimplementasikan secara embedded programming ke dalam Arduino Uno pada sistem robot IPBD.Kata kunci: Inverted pendulum beroda, Pemodelan, LQR ABSTRACTThis paper describes the process of modeling two-wheeled pendulum inverted robots (IPBD) using the Lagrange dynamics. After the IPBD robot model system was obtained, the optimal control technique in this case using a linear quadratic regulator (LQR) was used to see the system response step and the response of the system response to interference. Before the LQR control is implemented, simulation using Matlab Simulink is conducted to get the gain K parameter on the LQR control. Furthermore, by varying the weighting matrix Q, the gain variation K will be obtained. There are five types of Q weighting matrix in this research and the R element matric is tuned with a value of 1. From the test, obtained results show that by raising the weighting matrix Q is produced a faster response to the steady state and overshoot is reduced. At the final stage, the gain K parameter from the simulation results will be implemented by embedded programming into Arduino Uno on the IPBD robot system.Keywords: Wheeled inverted pendulum, Modelling, LQR
Sistem Komunikasi Suara Bawah Air dengan Metoda Simplex menggunakan Visible Light Communication (VLC) JAMBOLA, LUCIA; DARLIS, ARSYAD RAMADHAN; LIDYAWATI, LITA; HUSAENI, DZIKRI FACHRI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2: Published May 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.253

Abstract

ABSTRAKSistem komunikasi suara bawah air telah dikenal sejak lama, diantaranya sonar dan akustik. Seiring perkembangan zaman dan kemajuan teknologi, kini hadir komunikasi dengan media transmisi cahaya tampak yaitu Visible Light Communication (VLC) yang dapat diterapkan pada komunikasi bawah air. Pada penelitian ini telah dilakukan komunikasi suara bawah air (simplex) menggunakan VLC, dengan media akuarium berisi air dan beberapa pengujian diantaranya menggunakan color filter, didapat hasil pengujian terbaik yaitu tegangan 4,4 Vpp dan frekuensi 3,003 kHz untuk color filter yellow, pengujian menggunakan lensa didapat hasil pengujian terbaik yaitu tegangan 4,4 Vp-p dan frekuensi 3,051 kHz untuk lensa (+50), dan pengujian terakhir menggunakan lampu UV didapat hasil pengujian terbaik dengan tegangan 4,4 Vp-p dan frekuensi 3,010 kHz. Implementasi sistem VLC ini menunjukkan hasil yang baik dan layak untuk diterapkan pada komunikasi suara bawah air (simplex).Kata kunci: VLC, Komunikasi Suara Bawah Air, Simplex. ABSTRACTUnderwater voice communication systems have been known for a long time, including sonar and acoustics. Along with the development and advancement of technology, now there is communication with visible light transmission media, namely Visible Light Communication (VLC) which can be applied to underwater communication. Under this study underwater voice communication (simplex) has been carried out using VLC, with aquarium media containing water and several tests including using a color filter, the best test results obtained are voltage 4.4 Vp-p and frequency 3.003 kHz for yellow color filter, testing using the lens obtained the best test results namely voltage 4.4 Vp-p and frequency 3.051 kHz for lenses (+50), and the last test using UV lights obtained the best test results with a voltage of 4.4 Vp-p and a frequency of 3.010 kHz. The implementation of the VLC system shows good and feasible results to be applied to underwater voice communication (simplex).Keywords: VLC, Underwater Voice Communication, Simplex.
Monitoring Keseimbangan Distribusi Beban Transformator untuk Meminimalisasi Terjadinya Rugi Energi SETIAWAN, EDY; ANINDITA, GALIH; SYAHID, ACHMAD; RACHMAN, ISA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2: Published May 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.297

Abstract

ABSTRAKPola distribusi beban antara ketiga fasa pada saluran distribusi sekunder transformator kurang diperhatikan, berakibat ketidakseimbangan antara ke tiga fasa pada sistem distribusi sekunder transformator dan menyebabkan rugi energi yang terjadi pada jaringan distribusi sekunder akan semakin meningkat. Peneliti merancang sistem monitoring keseimbangan beban pada saluran distribusi sekunder transformator dengan metode eksperimen dan pembuatan prototipe. Penyimpangan rata-rata pembacaan sensor arus 6.7% dan pembacaan sensor tegangan 5.84% dan rugi energi terbesar didapatkan pada saat persen pembebanan di fasa R=88,13%, fasa S=42,80% dan di fasa T=20,14%, yaitu 24,1 Wh pada penghantar netral dan 109,64 Wh pada penghantar pembumian.Kata kunci: voltage sensing, current sensing, beban tidak seimbang, arus netral, rugi energi ABSTRACTThe pattern of load distribution between the three phases in the transformer secondary distribution channel is not noticed. This situation results in an imbalance between the three phases of the transformer secondary distribution and causes energy losses that occur in the secondary distribution network will increase. The researcher designed a load balance monitoring system in the transformer secondary distribution channel with the experimental method and prototype manufacturing. The average error of the current sensing at 6.7%, for the voltage sensing interface is 5.84% and the biggest energy loss is obtained at % loading on phase R= 88,13%, phase S = 42,80% and phase T = 20.14%, system reading 24,1 Wh on neutral conductor and 109,64 Wh on earthing conductor.Keywords: voltage sensing, current sensing, unbalanced load, neutral current, energy loss

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