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All Journal Mechatronics, Electrical Power, and Vehicular Technology Jurnal INKOM Jurnal Riset Industri Teknologi Indonesia Ketenagalistrikan dan Energi Terbarukan
Estiko Rijanto
Research Centre for Electrical Power & Mechatronics, Indonesian Institute of Sciences, Komp LIPI Jl Cisitu 21/54D, Gd 20, Bandung 40135
Computer Science & IT Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering

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SISTEM KONTROL PADA OTOMIC FORCE MICROSCOPY DAN NANO POSITIONING Rijanto, Estiko
Jurnal Riset Industri Vol 3, No 3 (2009): Peningkatan Nilai Tambah melalui Inovasi Kemasan
Publisher : Badan Penelitian dan Pengembangan Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1617.731 KB)

Abstract

Perkembangan ilmu pengetahuan dan teknologi instru8mentasi Iscaning Probe Microsocopy (SPM) telah memungkinkanya berfungsi sebagai mata dan jari untuk melihat dan mengkontrol materi pada ukuran nano meter. Hal ini memberi dampak yang dramatis pada teknologi nano (nanotechnology) di berbagai bidang, biokimia, farmasi, elektro-kimia, tribologi, material, dan fisika. Penerapan tekni kontrel sangat penting pada instrumentasi teknologi nano karena tampa kontroler yang memadai instrumen ini tidak dapat berfungsi dengan baik. Tujuan makalah ini adalah untuk menjelaskan perancangan konsep sistem kontrol pada intrumentasi teknologi nanokhususnya Atomic force Microscopy (AFM) dan nano positioning. Kontroler untuk thermal driven Noncontact AFM pada prinsipnya meregulasi frekuensi resonan dengan mengontrol jarak memakai kontroler umpan balik, sedangkan untuk Transient force AFM pada prinsipnya mengunakan kalman filter untuk meningkatkan kecepatan dan menjaga mutu citra. Hasil eksperimen sistem nanopositioning untuk AFM menunjukan bahwa pengunaan metoda kontrol kokoh H_infinty memberikan hasil scanning  yang lebih baik dibandingkan dengan kontrol klasik. Hasil eksperimen untuk ultra-high desinty electronic data dtorage menunjukan kontroler mengunakan umpan balik dan umpan maju mampu merealisasikan da storage dengan kapasitas 1 tera bit per inci persegi dengan kecepatan baca/tulis 12.5 KB per detik.
ANALISIS KINEMATIK DAN DINAMIK MEKANISME PENGGERAK 2-DOF UNTUK ANTENA BERGERAK PADA KOMUNIKASI SATELIT Saputra, Hendri Maja; Rijanto, Estiko
Teknologi Indonesia Vol 32, No 1 (2009)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v32i1.52

Abstract

Kinematic and dynamic analysis of a mechanism for mobile antennas used in positioning control system of mobile satellite communication (SATCOM) antennas has been conducted. This antenna driving mechanism has two degrees of freedom (2-DOF), they are azimuth and elevation directions. The antenna driving mechanism is put on a vehicle (either land or water), so that the analysis includes vehicle body disturbance in three directions (3-DOF), namely roll, pitch, and yaw. The dynamical model has been made using D-H notation which is common in robotics. Computer simulation has been conducted to analyze the relationship between the antenna movement velocity (azimuth and elevation direction) and the required actuator torque to control the mechanism so that the antenna always keeps pointing to a satellite 630 km above the earth surface. The simulation results show that antenna movement needs smaller actuator torque in smaller elevation and larger actuator torque in larger elevation. For the antenna dimension and the antenna driving mechanism used in this research, it is obtained that nominal value of actuator torque for pan (azimuth) direction is 30 Nm and for tilt (elevation) direction is 200 Nm.
ANALYSIS OF BRAKING DYNAMICS USING LINEARIZED QUARTER VEHICLE MODEL rozaqi, latif; Rijanto, Estiko
Teknologi Indonesia Vol 38, No 3 (2015)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v38i3.237

Abstract

A deep understanding in dynamical characteristics of braking systems is very important in designing an appropriate control system to be applied in a vehicle. This paper examines the braking system dynamics of a car using Quarter Vehicle Model (QVM). In order to facilitate the analysis, a linear model has been derived from a nonlinear QVM. The dynamical characteristics of braking are analyzed using state space equation and then explored through numerical simulation. The result is then compared with nonlinear Euler and 4th order Runge-Kutta methods. In the numerical simulation, the dynamic model is given some different braking inputs and different road conditions to notice the dynamical response of the model. This study learns that applying a sudden braking torque will cause the slip response to move to locked condition too fast. By reducing the input gradient by 48.6673%, 14.3875% improvement on longitudinal speed deceleration will be gained. Therefore, applying braking torque gradually will increase braking effectivity. Moreover, dry asphalt gives the best response compared to both dry concrete and wet asphalt because it gives 9.1940% more effective longitudinal speed deceleration.
START-UP CONTROL USING DC POWER SUPPLY FOR ISOLATED MODE OPERATION OF 100 kW WIND POWER PLANT Rijanto, Estiko
Ketenagalistrikan dan Energi Terbarukan Vol 9, No 1 (2010): KETENAGALISTRIKAN DAN ENERGI TERBARUKAN
Publisher : P3TKEBTKE

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Abstract

This paper reports design of a start-up controller for a 100 kW wind electrical power plant. The plant is designed to be able to work either in isolated or grid-connected circumstances. This paper aims at designing a controller for start-up and operation of the plant in isolated mode. Thecontroller has been designed to provide excitation voltage during the start-up and to maximize energy conversion during operation as well as to maintain the DC link voltage be at a desired value. Controller design uses vector control and hysteresis PWM approaches. From computer simulationresults it is concluded that the plant can start-up at cut in wind speed of 2.5 m/sec by maintaining DC link voltage at 96 V, and it changes over from motoring mode to generating mode in 15.5 seconds giving start-up electrical power of 761 Watt. Moreover, the controller can make the generator produce electrical power of 23.48 kW and 111.58 kW for average wind speed of 7 m/s and rated wind speed of 12 m/s, respectively.
RANCANG BANGUN REGULATOR TEGANGAN MANUAL DENGAN FITUR INTERLOCK UNTUK PLTA KAPASITAS 9MVA Rijanto, Estiko
Ketenagalistrikan dan Energi Terbarukan Vol 11, No 1 (2012): KETENAGALISTRIKAN DAN ENERGI TERBARUKAN
Publisher : P3TKEBTKE

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Abstract

Beberapa Pembangkit Listrik Tenaga Air (PLTA) di Indonesia yang telah dioperasikan lebih dari satu dekade masih memakai kontroler tegangan analog yang diimpor dari luar negeri. Berhentinya produksi kontroler tersebut mengancam kesinambungan operasi PLTA yang bersangkutan. Tujuan penelitian ini adalah untuk merancang bangun sebuah unit regulator tegangan manual (manual voltage regulator: MVR) yang memiliki fitur interlock menggunakan rangkaian elektronik analog untuk sistem eksitasi statik pada pembangkit listrik tenaga air (PLTA) berkapasitas 9MVA. Fungsi interlock ini adalah untuk memuluskan perubahan mode operasi dari mode otomatik memakai automatic voltage regulator (AVR) ke mode manual memakai MVR atau sebaliknya. Kontroler ini tersusun oleh beberapa modul utama yaitu: (a) pengeset arus medan, (b) sensor arus medan, (c) regulator arus medan, (d) penguat penyesuai, (e) unit gerbang penyalaan jembatan thyristor, (f) pemonitor pulsa dan (g) rangkaian interlock. Unit MVR analog hasil rancang bangun telah diujicoba pada eksperimen simulasi dan dapat bekerja dengan baik memenuhi spesifikasi. Some hydro electrical power plants (HEPP) which have been operated in Indonesia for more than one decade still use analog voltage controllers imported from abroad. Production discontinuity of such controllers threatens those hydro electrical power generation plants’ operation. The aim of this paper is to develop a manual voltage regulator (MVR) using analog electronic circuit for static excitation system used in power generation plants with capacity of 9MVA. The developed analog manual voltage regulator consists of some main electronic modules such as: (a) reference current setter, (b) field current sensor, (c) field current regulator, (d) matching amplifier, (e) gate unit, (f) pulse monitoring and (g) interlock circuit. The developed manual voltage regulator has been tested using experimental simulator and it is proved working well satisfying the specification.
RANCANG BANGUN UNIT GERBANG ANALOG PENGGERAK JEMBATAN THYRISTOR UNTUK SISTEM KONTROL TEGANGAN PEMBANGKIT LISTRIK TENAGA MINI HIDRO (PLTMH) Rijanto, Estiko
Ketenagalistrikan dan Energi Terbarukan Vol 8, No 2 (2009): KETENAGALISTRIKAN DAN ENERGI TERBARUKAN
Publisher : P3TKEBTKE

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Abstract

Beberapa PLTMH di Indonesia ada yang dibangun tahun 1990an. PLTMH ini menggunakan teknologi analog untuk sistem kontrol tegangannya yang diimpor dari luar negeri. Berhentinya produksi unit gerbang analog penggerak jembatan thyristor di luar negeri mengancam kesinambungan operasi PLTA yang bersangkutan. Tujuan penelitian ini adalah untuk merancang bangun sebuah unit gerbang analog pembangkit pulsa penggerak rangkaian thyristor setengah gelombang untuk sistem kontrol tegangan pembangkit listrik generator sinkron 3 fasa. Rancang bangun unit gerbang analog terdiri dari: (a) rangkaian penggeser fasa, (b) rangkaian penguat dan peredam, dan (c) transformator pulsa yang dipasang di rangkaian penguat dan peredam. Unit gerbang analog hasil rancang bangun pada penelitian ini telah diujicoba pada PLTMH 7.750 KVA dan bekerja dengan baik.;
RANCANG BANGUN MODUL PENGKONDISI SINYAL & ANTAR MUKA UNTUK KONTROLER TEGANGAN DIJITAL PADA PEMBANGKIT LISTRIK TENAGA AIR (PLTA) Rijanto, Estiko; Muqorobin, Anwar
Ketenagalistrikan dan Energi Terbarukan Vol 10, No 1 (2011): KETENAGALISTRIKAN DAN ENERGI TERBARUKAN
Publisher : P3TKEBTKE

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Abstract

Saat ini masih banyak PLTA yang beroperasi menggunakan kontroler tegangan analog. Beberapa komponen pentingnya semakin sulit ditemukan sehingga mengancam keberlangsungan operasi PLTA yang bersangkutan. Tujuan penelitian ini adalah untuk merancang bangun sebuah kontroler tegangan dijital yang dapat dipakai pada PLTA berkapasitas 9 MVA dengan metoda reverse engineering dan updating. Tujuan makalah ini adalah melaporkan hasil rancang bangun tersebut khususnya terkait modul pengkondisi sinyal dan antar muka. Karena algoritma kontrol direalisasikan memakai DSP, maka diperlukan pembuatan modul pengkondisi sinyal ADC dan DAC. Modul antara muka pengeset tegangan operator dan pemonitor driver dibuat memakaimikrokontroler 8 bit. Hasil eksperimen menunjukkan bahwa: modul pengkondisi sinyal ADC dan DAC yang dibuat berfungsi dengan baik, modul pengeset tegangan mampu memproses perintah secara tepat, dan modul pemonitor driver mampu mendeteksi pulsa penyalaan dan memberikan indikator status berupa: normal, terlalu panjang, dan terlalu pendek.
Object Recognition System in Remote Controlled Weapon Station using SIFT and SURF Methods Mirdanies, Midriem; Prihatmanto, Ary Setijadi; Rijanto, Estiko
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 2 (2013)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2092.691 KB) | DOI: 10.14203/j.mev.2013.v4.99-108

Abstract

Object recognition system using computer vision that is implemented on Remote Controlled Weapon Station (RCWS) is discussed. This system will make it easier to identify and shoot targeted object automatically. Algorithm was created to recognize real time multiple objects using two methods i.e. Scale Invariant Feature Transform (SIFT) and Speeded Up Robust Features (SURF) combined with K-Nearest Neighbors (KNN) and Random Sample Consensus (RANSAC) for verification. The algorithm is designed to improve object detection to be more robust and to minimize the processing time required. Objects are registered on the system consisting of the armored personnel carrier, tanks, bus, sedan, big foot, and police jeep. In addition, object selection can use mouse to shoot another object that has not been registered on the system. Kinectâ„¢ is used to capture RGB images and to find the coordinates x, y, and z of the object. The programming language used is C with visual studio IDE 2010 and opencv libraries. Object recognition program is divided into three parts: 1) reading image from kinectâ„¢ and simulation results, 2) object recognition process, and 3) transfer of the object data to the ballistic computer. Communication between programs is performed using shared memory. The detected object data is sent to the ballistic computer via Local Area Network (LAN) using winsock for ballistic calculation, and then the motor control system moves the direction of the weapon model to the desired object. The experimental results show that the SIFT method is more suitable because more accurate and faster than SURF with the average processing time to detect one object is 430.2 ms, two object is 618.4 ms, three objects is 682.4 ms, and four objects is 756.2 ms. Object recognition program is able to recognize multi-objects and the data of the identified object can be processed by the ballistic computer in realtime.
Pengurangan Subsidi BBM dan Polusi Udara Melalui Kebijakan Program Konversi dari BBM ke BBG Untuk Kendaraan di Propinsi Jawa Barat Susanti, Vita; Hartanto, Agus; Subekti, Ridwan Arief; Saputra, Hendri Maja; Rijanto, Estiko; Hapid, Abdul
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 1, No 2 (2010)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (408.963 KB) | DOI: 10.14203/j.mev.2010.v1.43-52

Abstract

The  number  of  vehicle  that  use  oil  (BBM)  is  increasing  every  year  in  Indonesia  while  national  oil  reserve become smaller, so that the oil should be imported. The impact of using oil are increasing subsidy and air pollution.  Thus, it is now becoming important to replace oil with another environmentally friendly energy, one of them is gas (BBG). Based on the number of vehicle and infrastructure in gas pipeline, part of northern West Java potentially can  be  chosen  for  the  implementation  of  conversion  program  to  gas  (BBG).  The number  of  vehicle  in  potential regions  such  as  Depok,  Cibinong,  Bogor,  Bekasi,  Cikarang,  Karawang,  Purwakarta,  Cirebon,  and  Bandung  are around 875,505 units. From these data, we simulated the potential profit to be gained each year by converting 10% for the first year and increasing it to 5% for every year. By investing 3.16 trillion for conversion, 14.9 trillion can be achieved in  the  form  of  fuel  subsidy  savings.  In  addition,  emission  reduction  converted  to  a  CDM  (clean development  mechanism)  can  become  local  revenues.  Total CDM generated during 5 years predicted is of U.S $ 772,385. From this study, it can be concluded that converting oil (BBM) to gas (BBG) is highly beneficial. 
Designing optimal speed control with observer using integrated battery-electric vehicle (IBEV) model for energy efficiency Ristiana, Rina; Rohman, Arief Syaichu; Rijanto, Estiko; Purwadi, Agus; Hidayat, Egi; Machbub, Carmadi
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 9, No 2 (2018)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3981.796 KB) | DOI: 10.14203/j.mev.2018.v9.89-100

Abstract

This paper develops an optimal speed control using a linear quadratic integral (LQI) control standard with/without an observer in the system based on an integrated battery-electric vehicle (IBEV) model. The IBEV model includes the dynamics of the electric motor, longitudinal vehicle, inverter, and battery. The IBEV model has one state variable of indirectly measured and unobservable, but the system is detectable. The objectives of this study were: (a) to create a speed control that gets the exact solution for a system with one indirect measurement and unobservable state variable; and (b) to create a speed control that has the potential to make a more efficient energy system. A full state feedback LQI controller without an observer is used as a benchmark. Two output feedback LQI controllers are designed; including one controller uses an order-4 observer and the other uses an order-5 observer. The order-4 observer does not include the battery state of charge as an observer state whereas the order-5 observer is designed by making all the state variable as the observer state and using the battery state of charge as an additional system output. An electric passenger minibus for public transport with 1500 kg weight was used as the vehicle model. Simulations were performed when the vehicle moves in a flat surface with the increased speed from stationary to 60 km/h and moves according to standard NEDC driving profile. The simulation results showed that both the output feedback LQI controllers provided similar speed performance as compared to the full state feedback LQI controller. However, the output feedback LQI controller with the order-5 observer consumed less energy than with the order-4 observer, which is about 10% for NEDC driving profile and 12% for a flat surface. It can be concluded that the LQI controller with order-5 observer gives better energy efficiency than the LQI controller with order-4 observer
Co-Authors A.A. Ketut Agung Cahyawan W Agus Hartanto agus Purwadi Anwar Muqorobin Apriza Muttaqien, Muhamad Arief Syaichu Rohman, Arief Syaichu Arif Santoso Ary Setijadi Prihatmanto Bagus Budiwantoro Budi Prawara Carmadi Machbub Edy Riyanto Hendri Maja Saputra Hidayat, Egi Jamhari Jamhari Kanarachos, Stratis Midriem Mirdanies Mira Kania Sabariah Muhamad Haddin Pamungkas, Tri Dedi Rasli bin Abd Ghani, Rasli bin Ridwan Arief Subekti Ristiana, Rina Rizqi Andry Ardiansyah Roni Permana Saputra Rozaqi, Latif Rozaqi, Latif Slamet Kasbi, Slamet Sukma Aditya Vita Susanti Wibowo, Addy Zainal Abidin