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All Journal Rotasi MEDIA KOMUNIKASI TEKNIK SIPIL TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) Jurnal EECCIS Journal of ICT Research and Applications Conference SENATIK STT Adisutjipto Yogyakarta Angkasa: Jurnal Ilmiah Bidang Teknologi KACANEGARA Jurnal Pengabdian pada Masyarakat Aviation Electronics, Information Technology, Telecommunications, Electricals, Controls (AVITEC) Scientific Journal of Mechanical Engineering Kinematika Community Development Journal: Jurnal Pengabdian Masyarakat International Journal of Innovation in Mechanical Engineering and Advanced Materials ENGAGEMENT: Jurnal Pengabdian Masyarakat Jurnal Inovasi Pengabdian Masyarakat Indonesian Journal of Aerospace
Okto Dinaryanto
Institut Teknologi Dirgantara Adisutjipto
Religion Aerospace Engineering Humanities Astronomy Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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The Visualization Study on the Slug Flow Mechanisms of the Air-Water Two-Phase in a 50 mm Horizontal Pipe Dinaryanto, Okto; Hudaya, Akhmad Zidni; Deendarlianto, Deendarlianto; Indarto, Indarto
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.273 KB) | DOI: 10.28989/senatik.v4i0.171

Abstract

The slug flow phenomena are often encountered in various industrial applications such as petroleum, process, and power plant. The presence of slug flow should be avoided as it causes structural damage due to resonance, corrosion and pipes blast. From the view point of multiphase flow, the understanding of the slug initiation mechanism is very important in pipeline design. This research is conducted using horizontal transparent acrylic pipes with diameters of 50 mm with a variation on the superficial velocity of water between 0,1 m/s and 0,77 m/s and superficial velocity of air between 0,31 m/s and 6,2 m/s. In the present experimental study, the slug initiation mechanisms was explained by visual observation by using high speed video cameras. As the results, the slug flow initiation mechanism were clarified. Furthermore, the proposed of flow initiation map was introduced.
Adaptive Traffic Controller Based On Pre-Timed System Freddy Kurniawan; Haruno Sajati; Okto Dinaryanto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 14, No 1: March 2016
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v14i1.2798

Abstract

Adaptive traffic controller systems based on image processing have been developed widely. Nevertheless, in a developing country, the systems often could not be easily applied because all types of vehicle use the same road. Therefore, to overcome the problem, the new concept of the systems is proposed. The systems were developed from a pre-timed traffic controller system that based on AVR microcontroller. By default, the systems use the signal-timing plans to control the vehicle flow. To accommodate the traffic variations, a new method of vehicle detection has been built. The method calculated an intensity histogram standard deviation of the image representing a detection area to determine traffic density of each intersection lane. The systems modified the green-time of each lane based on the traffic density. The method could detect all types of vehicles and work properly in a day and a night time.
Pre-Timed and Coordinated Traffic Controller Systems Based on AVR Microcontroller Freddy Kurniawan; Denny Dermawan; Okto Dinaryanto; Mardiana Irawati
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 12, No 4: December 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v12i4.497

Abstract

The major weaknesses of traffic controllers in Indonesia are unable to accommodate the variety of traffic volume and unable to be coordinated. To solve the problem, a pre-timed and coordinated traffic controller system is build. The system consists of a master and a local controller. Each controller has a database containing signal-timing plans that would be allocated to manage vehicle flows. To synchronize the signal-timing, the master controller sends the synchronization data to the local controller wirelessly and the local controller shifts the end of a cycle by adding or subtracting the green interval of any phases. The transition time for synchronization only takes one to several cycles. The algorithm for controlling the traffic including coordination can be done by an AVR microcontroller. Memory usage of the microcontroller is lower than 10% meanwhile the CPU utilization is no more than 1%, thus the systems could be widely developed.
Penentuan Orientasi dan Translasi Gerakan UAV menggunakan Data Fusion berbasis Kalman Filter Freddy Kurniawan; Muhammad Ridlo Erdata Nasution; Okto Dinaryanto; Lasmadi Lasmadi
Aviation Electronics, Information Technology, Telecommunications, Electricals, Controls (AVITEC) Vol 3, No 2 (2021): August
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v3i2.890

Abstract

Navigation system is essential in estimating the orientation and translation motion of UAV. The system can utilize data from several sensors and devices, e.g. MIMU and GPS. The orientation of UAV can be precisely calculated by means of data from accelerometer and magnetometer when both sensors are in static state. Meanwhile, under dynamic conditions, the orientation can be more precisely predicted through the use of gyroscope sensor data. In order to attain a robust navigation system, a data fusion based on Kalman filter is built to estimate the orientation from the accelerometer, gyroscope, and magnetometer sensors. Moreover, for sake of achieving high accuracy, the filter will further correct the orientation by giving a higher weight to the data from accelerometer and magnetometer sensors when the UAV is in static condition. In the case of its position, the UAV position will be estimated by performing data fusion of MIMU and GPS data. Based on the experiments, it could be showed that data fusion based on Kalman filter provided more accurate results of orientation and position of UAV. The result of orientation based on gyroscope sensor data has an average error of 18.12°, while those obtained by accelerometer and magnetometer sensors data is 1.3°. Furthermore, by using the data fusion based on Kalman filter, the error of orientation predicted by combining data from accelerometer, magnetometer, and gyroscope will decrease to 0.87°.
A Novel Boost-Buck Converter Architecture for Improving Transient Response and Output-Voltage Ripple Freddy Kurniawan; Lasmadi Lasmadi; Okto Dinaryanto; Bambang Sudibya; Mohammad Ridlo Erdata Nasution
Journal of ICT Research and Applications Vol. 14 No. 2 (2020)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2020.14.2.4

Abstract

Buck-boost converters are widely used in the development of DC-DC converters. Several techniques and algorithms have been introduced to improve the transient response of buck-boost converters. However, due to the opposite trends of the output current change and the output voltage change, undershoot or overshoot in the output voltage still seems to be inevitable. In order to overcome this problem, a novel boost-buck converter architecture is proposed to build a fast transient response DC-DC converter. The converter consists of a cascaded configuration of the boost and buck stages. The boost stage converts the input voltage to the shared capacitor voltage and the buck stage supplies energy to the load by converting the shared capacitor voltage to the output voltage. By harnessing the energy stored in the shared capacitor, the transient response of the boost buck converter can be improved to 2 µs in a step-up load current change of 1 A with an output-voltage ripple of 15 mV.
The Alternative Binary Geothermal Power-Plant Design to Utilize the Waste Heat in Lahendong Plant Eli Kumolosari; Bahrul Jalaali; Kutut Suryopratomo; Okto Dinaryanto
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 12, No 2 (2020): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (889.466 KB) | DOI: 10.28989/angkasa.v12i2.726

Abstract

The first geothermal binary system in Indonesia that has successfully implemented is a 500kW binary system in Lahendong. Yet, there is still a plenty room of improvement for binary system development in Lahendong. This study aims to give an alternative design of the binary system by using an organic Rankine cycle. The investigations of thermodynamic analysis based on the law of thermodynamics, silica scaling analysis, and optimization of working fluid selection are presented. Flashing process from separator produces vapor and liquid-brine with mass flow rates 48.6 kg/s and 173.6 kg/s at separator pressure of 10.23 bar. Based on second law thermodynamics analysis, obtained the maximum useful energy from brine flow is 7.2MW. Based on the simulation results, it is achieved that the potential power generated by waste heat from the Lahendong plant is 2.46MW with the net thermal and exergy efficiency by 11% and 34%, respectively. Compared to the current operating binary system, still, much available energy needs to be harnessed in the future from the Lahendong plant.
Implementasi program peningkatan kompetensi siswa SMK melalui pelatihan CAD dan CFD serta evaluasi berbasis Key Performance Indicator Bahrul Jalaali; Eli Kumolosari; Okto Dinaryanto
KACANEGARA Jurnal Pengabdian pada Masyarakat Vol 6, No 1 (2023): Januari
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/kacanegara.v6i1.1280

Abstract

Dalam rangka meningkatkan pengetahuan dan kompetensi siswa SMK mengenai teknologi komputasi perancangan dan dinamika fluida, dilakukanlah kegiatan pengabdian masyarakan berupa workshop dan pelatihan computer-aided-design (CAD) dan computational-fluid-dynamics (CFD). Adapun untuk melakukan evaluasi luaran dari program dilakukan dilakukan kajian berbasis metode key performance indicators (KPI) untuk mendapatkankan hasil dan pembahasan yang akurat pada peforma dan aspek sustainability kegiatan. Kegiatan pengabdian kepada masyarakat ini berhasil terlaksana dengan baik dan lancar. Materi yang disampaikan bagi peserta adalah sebagai salah satu sarana pembelajaran untuk meningkatkan pemahaman siswa dan guru SMK Penerbangan Techno Terapan Makassar. Berdasarkan kajian evaluasi program menggunakan metode KPI, secara umum didapatkan hasil yang baik dan lancar sesuai dengan argumen sebelumnya. Dari hasil analisis dan evaluasi didapatkan bahwa mayoritas peserta (>90%) menyatakan bahwa acara berlangsung sesuai dengan tema, menambah pengetahuan dan sesuai harapan peserta. Kedepan, diharapkan pemahaman akan komputasi dinamika fluida ini dapat berintegrasi dengan konsep Revolusi Industri 4.0. Kegiatan ini diharapkan dapat memberikan gambaran dan pengetahuan kepada siswa mengenai penggunaan dan pemanfaatan komputasi dinamika fluida.
Penyebarluasan Pengetahuan Manajemen Pesawat Udara Bagi Alumni Teknik Mesin Uyuunul Mauidzoh; Dedet Hermawan Setiabudi; Okto Dinaryanto
JUPNA: Jurnal Pengabdian Astina Vol 1 No 2 (2023): JIPM: Jurnal Inovasi Pengabdian Masyarakat
Publisher : CV. Astina Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55903/jipm.v1i2.67

Abstract

Kegiatan pengabdian kepada masyarakat diselenggaran dengan tujuan untuk memberikan pengetahuan tentang pesawat udara kepada alumni Teknik Mesin ITD Adisutjipto, kegiatan pengabdian masyarakat dilaksanakan secara tatap muka langsung. Kegitan pengabdian masyarakat ini dalam rangka pembinaan potensi kedirgantaraan. Kegitan pengabdian masyarakat dilaksanakan dengan metode ceramah presentasi dan ditutup dengan sesi tanya jawab untuk mengetahui sejauh mana pemahaman peserta, pada sesi tanya jawab peserta kegiatan dapat bertanya pada narasumber, narasumber juga dapat bertanya pada peserta kegiatan mengenai materi yang telah disampaikan. Pada kegiatan pengabdian masyarakat ini peserta cukup antusias, hal tersebut terlihat aktifnya peserta pada saat kegiatan tanya jawab. Peserta juga cukup antusias dalam menjawab pertanyaan dari narasumber kegiatan..
Studi Numerik Evaluasi Kinerja Liquid-Liquid Cylindrical Cyclone (LLCC) Sebagai Oil-Water Separator Bahar, Shofwan; Sutono, Sugoro Bhakti; Hudayaa, Akhmad Zidni; Qomaruddin, Qomaruddin; Dinaryanto, Okto; Ghufron, Hanif; Faizi, Achmad Noor
ROTASI Vol 25, No 4 (2023): VOLUME 25, NOMOR 4, OKTOBER 2023
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.25.4.1-6

Abstract

Pembuangan air yang masuk pada lambung kapal nelayan seringkali membawa dampak buruk bagi lingkungan, yaitu terbawanya oli maupun sisa minyak lain dalam penelitian kali ini diasumsikan sebagai kerosin yang bersumber dari mesin kapal tersebut sehingga jika dibiarkan dan semakin banyaknya jumlah kapal dikhawatirkan akan menjadi petaka dimasa mendatang. Penggunaan Hydrocyclone separator untuk pemisahan oil-water yaitu menggunakan jenis Liquid-Liquid Cylindrical Cyclone (LLCC) telah dipelajari secara eksperimental dalam banyak penelitian sebelumnya terbukti sangat efektif dan tentunya sangat murah dibandingakan dengan media filtrasi. Namun target penelitian yang digunakan kebanyakan adalah dunia industri terutama dunia perminyakan, sedangkan disisi lain pada dunia nelayan khususnya nelayan lokal dirasa sangat memerlukan teknologi tersebut untuk turut mengurangi dampak lingkungan akibat pembuangan limbah kapal. Keterbatasan data dan kerahasiaan data eksperimental peneliti lain tidak bisa bebas diexpose dan didapat dengan mudah. Sehingga dalam rangka untuk keperluan desain dan optimasi suatu sistem peralatan yang melibatkan perilaku aliran dua fasa (fasa liquid-liquid) maka perlu mencari metode lain yakni dengan studi numerik menggunakan bantuan perangkat lunak computational fluid dynamic (CFD). Melalui studi numerik, perkembangan seluruh aliran dapat diprediksi melalui studi perilaku aliran didalam sistem. Hal ini dapat menghemat biaya penelitian eksperimen yang sangat mahal. Tujuan dari penelitian ini adalah untuk mensimulasikan desain LLCC untuk mendapatkan visualisasi bagaimana proses oil-water dapat terpisahkan didalam LLCC. Dan dari data-data yang diperoleh dari simulasi diketahui bahwa desain dari LLCC berhasil memisahkan kandungan kerosin sampai 0% dari dalam air.
The Visualization Study on the Slug Flow Mechanisms of the Air-Water Two-Phase in a 50 mm Horizontal Pipe Dinaryanto, Okto; Hudaya, Akhmad Zidni; Deendarlianto, Deendarlianto; Indarto, Indarto
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v4i0.171

Abstract

The slug flow phenomena are often encountered in various industrial applications such as petroleum, process, and power plant. The presence of slug flow should be avoided as it causes structural damage due to resonance, corrosion and pipes blast. From the view point of multiphase flow, the understanding of the slug initiation mechanism is very important in pipeline design. This research is conducted using horizontal transparent acrylic pipes with diameters of 50 mm with a variation on the superficial velocity of water between 0,1 m/s and 0,77 m/s and superficial velocity of air between 0,31 m/s and 6,2 m/s. In the present experimental study, the slug initiation mechanisms was explained by visual observation by using high speed video cameras. As the results, the slug flow initiation mechanism were clarified. Furthermore, the proposed of flow initiation map was introduced.
Co-Authors Abdillah, Helmi Fauzan Abdul Haris Subarjo abdul haris subarjo, abdul haris Agung Prakoso Akhmad Zidni Hudaya Andinusa Rahmandhika Arif Pambekti Bahrul Jalaali Bahrul Jalaali Bambang Sudibya Bangga Dirgantara Adiputra Dedet Hermawan Setiabudi Dedet Hermawan Setiabudi Dedet Hermawan Setiabudi, Dedet Hermawan Deendarlianto Denny Dermawan Denny Dermawan Dharmawan, Muchamad Wizdan Djarot Wahju Santoso Edi Prasetyo Eli Kumolosari Faizi, Achmad Noor Fajar Nugroho FAJAR NUGROHO Freddy Kurniawan Freddy Kurniawan Freddy Kurniawan Freddy Kurniawan Freddy Kurniawan Freddy Kurniawan Ghufron, Hanif Gunawan Gunawan Haris Subarjo, Abdul Haruno Sajati Hermawan S, Dedet Indarto Indarto Jalaali, Bahrul Kusumawardani, Mawar Kutut Suryopratomo Lasmadi Lasmadi Lasmadi Lasmadi Linda Meilani Mardiana Irawati Mawar Kusumawardani Muhammad Hisyam Nasution, Muhammad Ridlo Erdata Pinandhita, Lazuardy Rahendra Pratiwi, Elisabeth Anna Qoaruddin Qomaruddin Rizqi ilmal yaqin, Rizqi ilmal Santoso, Prasidananto Nur Setiawan, Paulus Sudarmaji, Catur Sutono, Sugoro Bhakti Syahrizal Teguh Wibowo Uyuunul Mauidzoh Uyuunul Mauidzoh Wahyu S, Djarot