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All Journal Mechatronics, Electrical Power, and Vehicular Technology Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Mahasiswa FEB Ketenagalistrikan dan Energi Terbarukan
Sukma Aditya
Universitas Sumatera Utara
Education Electrical & Electronics Engineering Energy Engineering

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EVALUASI KARAKTERISTIK PADA DISC BRAKE UNTUK PLT BAYU 100 kW MENGGUNAKAN PENDEKATAN METODE ELEMEN HINGGA; CHARACTERISTIC OF DISC BRAKE FOR WIND TURBINE 100 kW USING FINITE ELEMENT METHOD APPROACH Nugraha, Aditya Sukma; Zulkarnain, Zulkarnain
Ketenagalistrikan dan Energi Terbarukan Vol 16, No 2 (2017): KETENAGALISTRIKAN DAN ENERGI TERBARUKAN
Publisher : P3TKEBTKE

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Abstract

Disc brake pada sistem pembangkit listrik tenaga angin merupakan salah satu sub sistem pengaman dari sistem turbin angin untuk keperluan maintenance. Studi kasus turbin angin 100 kW yang terletak di Kabupaten Sukabumi dipilih untuk dilakukan kajian teknis untuk mengetahui fenomena disc brake selama operasi.Tiga variasi kecepatan yaitu 1350 , 2310, dan 3540 rpm telah dilakukan untuk mengetahui fungsi karakteristik kerja dari disc brake yang dipasang pada PLTB. Simulasi metode elemen hingga menggunakan software ANSYS dipilih untuk melakukan simulasi rotor dinamik dan fenomena termal pada disc brake. Berdasar diagram Campbell, diketahui bahwa putaran turbin tidak mengalami putaran kritis yang bisa menyebabkan simpangan besar. Gesekan antara pad dan disc brake selama proses operasi turbin memunculkan fenomena termal yang menunjukkan bahwa kenaikan temperatur dari disc brake masih menghasilkan tegangan yang aman dari batas tegangan yield material disc brake, yaitu menghasilkan 0,0018 MPa.  Disc brake on wind turbine system is one of many safety sub-systems at wind turbine for maintenance process. Case study of 100 kW wind turbine at Sukabumi regency was selected for technical study to find disc brake phenomenon during operations. Three variations of turbine speed, 1350, 2310, and 3540 rpm is used to get model characteristic from disc brake. Finite element analysis using ANSYS software is selected to get rotor dynamic and thermal phenomenon at disc brake. According to Campbell curve, the turbine speed during operation hasn't critical speed which allows large amplitude. Friction from the pad and disc brake during wind turbine operation shown the raised temperature at disc brake still acceptable, because disc stress still below yield stress, which is 0.0018 MPa.
Rancang Bangun Timbangan Digital Dengan Keluaran Berat Berbasis Arduino Uno Pada Automatic Machine Measurement Mass And Dimension Muflihana, Afdila; Arief, Dodi Sofyan; Nugraha, Aditya Sukma
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The logistics packages sent consist of various types of sizes and weights, so shipping costs are determined by the weight and size or dimensions of the goods. Almost all logistics companies in Indonesia still use conventional and separate methods in determining the volume and weight of logistics packages that play a role in determining prices, namely by measuring the dimensions of logistics packages using meters to obtain volume and then measuring the weight using the scales. To overcome the above, the idea was to create an Automatic Bulk Measurement and Dimension Machine that can process volume and weight measurements automatically at the same time making it more efficient. In relation to mass measurement, researchers will design devices related to mass or commonly called digital scales that use load cells with a capacity of 50 kg. Other supporting components are the Arduino Uno and HX711 modules as input signal amplifiers, where the analog data obtained will be received by the ADC which will be converted into digital data. Digital data will be processed again by the Arduino programming language to display the results on the LCD in units of gram (gr). Based on testing, with the same variation in load placement, the best position of the load is obtained when measuring mass, which is in the middle of the base with a percentage level (%). And the measurement results by varying the nominal load at the same interval where the load is placed in the middle of the base, then the percentage level (%) is obtained with an error of 0.032% and the percentage success rate of tool measurement is 99.968%. This shows the mass measurement process using a well-designed tool. Keyword: Digital Scale, Load cell, HX711, Arduino, LCD
Analisis Getaran pada Generator Magnet Permanen 1kW Hasil Rancang Bangun Pusat Penelitian Tenaga Listrik dan Mekatronik Irasari, Pudji; Nugraha, Aditya Sukma; Kasim, Muhammad
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 1, No 1 (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 (283.048 KB) | DOI: 10.14203/j.mev.2010.v1.19-26

Abstract

Vibration in a generator is an important factor in detail of design. To know the behavior of the vibration, a test is performed using vibratiometer. The aim in writing this paper is to obtain reference classification of vibration that can be viewed on a standard IEC 34-14 and DIN EN 60034-14. In this paper the results of testing, the value of velocity and acceleration, will be measured analytically so asto create value that can be used to compare the value of the test results with the value from 34-14 IEC and DIN EN 60034-14 standards. 
DC Brushless Motor Control Design and Preliminary Testing for Independent 4-Wheel Drive Rev-11 Robotic Platform Saputra, Roni Permana; Ardiansyah, Rizqi Andry; Mirdanies, Midriem; Santoso, Arif; Nugraha, Aditya Sukma; Muqorobin, Anwar; Saputra, Hendri Maja; Susanti, Vita; Rijanto, Estiko
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 2, No 2 (2011)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (714.52 KB) | DOI: 10.14203/j.mev.2011.v2.85-94

Abstract

This paper discusses the design of control system for brushless DC motor using microcontroller ATMega 16 that will be applied to an independent 4-wheel drive Mobile Robot LIPI version 2 (REV-11). The control system consists of two parts which are brushless DC motor control module and supervisory control module that coordinates the desired command to the motor control module. To control the REV-11 platform, supervisory control transmit the reference data of speed and direction of motor to control the speed and direction of each actuator on the platform REV-11. From the test results it is concluded that the designed control system work properly to coordinate and control the speed and direction of motion of the actuator motor REV-11 platform. 
Design of Vibration Absorber using Spring and Rubber for Armored Vehicle 5.56 mm Caliber Rifle Nugraha, Aditya Sukma; Budiwantoro, Bagus; Rijanto, Estiko
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 5, No 2 (2014)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1898.412 KB) | DOI: 10.14203/j.mev.2014.v5.75-82

Abstract

This paper presents a design of vibration absorber using spring and rubber for 5.56 mm caliber rifle armored vehicle. Such a rifle is used in a Remote-Controlled Weapon System (RCWS) or a turret where it is fixed using a two degree of freedom pan-tilt mechanism. A half car lumped mass dynamic model of armored vehicles was derived. Numerical simulation was conducted using fourth order Runge Kutta method. Various types of vibration absorbers using spring and rubber with different configurations are installed in the elevation element. Vibration effects on horizontal direction, vertical direction and angular deviation of the elevation element was investigated. Three modes of fire were applied i.e. single fire, semi-automatic fire and automatic fire. From simulation results, it was concluded that the parallel configuration of damping rubber type 3, which has stiffness of 980,356.04 (N/m2) and damping coefficient of 107.37 (N.s/m), and Carbon steel spring whose stiffness coefficient is 5.547 x 106 (N/m2) provides the best vibration absorption. 
Rancang Bangun Sistem Kontrol Mekanisme Pelacakan Matahari Beserta Fasilitas Telekontrol Hemat Energi Mirdanies, Midriem; Ardiansyah, Rizqi Andry; Saputra, Hendri Maja; Nugraha, Aditya Sukma; Rijanto, Estiko; Santoso, Adi
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 2, No 1 (2011)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (678.862 KB) | DOI: 10.14203/j.mev.2011.v2.31-40

Abstract

Solar energy produced by concentrated solar heat collector panels requires tracking mechanisms for a more optimal direction. This paper presents the design and construction of a low energy solar tracking control system with telecontrol facilities. To accelerate the movement of the panel in always adjusting itself to the direction of the sun, a combination of the timer and light sensor was used. In this control system, the reference signal is taken from two pieces of light sensors while the feedback is taken from the position and temperature sensors. The program has been developed using C language and was implemented on the microcontroller ATMega8535 as the brain of the system. Telecontrol facilities for monitoring the data to a computer uses transceiver modules via RS-232 connection. A DC motor having power capacity of 0.74 watts was used and was clutched with 1:7,300 gearbox ratio. Experiments on light sensor characteristics and simulated movement of the panel were carried out. From the light sensor experiment it can be concluded that the sensor produces 0-4 volt output signal when bright 3.3-3.9 volts, when cloudy and 1.5-3.3 volts when sunny. From the simulation of panel movement, it is known that the solar tracking control system moves the panel and tracks the direction of the sun movement. 
Ocean Current Energy Conversion System in Wallacea Region Using Variable Speed Control Approach Nugraha, Aditya Sukma; Rijanto, Estiko
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 1, No 1 (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 (808.708 KB) | DOI: 10.14203/j.mev.2010.v1.27-34

Abstract

Ocean Current Energy Conversion System (OCECS) is a promising green energy resource in this globe. The Thermohaline circulation data indicates that the Wallacea region has the potential of ocean current energy resources. This paper is aimed to propose research and development of OCECSs to be implemented in the Wallacea region. Firstly, four types of green energy conversion systems extracted from ocean are reviewed. Their advantages and disadvantages are discussed. Secondly, the potential of OCECS in the Wallacea region is described. Third, many types of turbines used for OCECS are reviewed and the turbine type for OCECS is selected to be implemented in the Wallacea region. Fourth, control strategy is proposed.From the work reported in this paper it is concluded that it is appropriate to implement OCECSs using axial flow water turbines in the Wallacea region, and that to maximize energy conversion variable speed control approach is selected together with control of mechanism to move the turbine vertically as well as to rotate the turbine in yaw direction. 
"STUDI EMPIRIS PENGARUH KECERDASAN EMOSIONAL, PERILAKU BELAJAR, DAN STRES KULIAH TERHADAP KETERLAMBATAN PENYELESAIAN STUDI (Studi pada Mahasiswa S1 Akuntansi Universitas Brawijaya Malang)" Aditya Sukma; Helmy Adam
Jurnal Ilmiah Mahasiswa FEB Vol 1, No 2: Semester Genap 2012/2013
Publisher : Fakultas Ekonomi dan Bisnis Universitas Brawijaya

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh kecerdasan emosional, perilaku belajar, dan stress kuliah terhadap keterlambatan penyelesaian studi (Studi pada Mahasiswa Jurusan Akuntansi Universitas Brawijaya Malang). Penelitian ini merupakan Penelitian ini mengembangkan penelitian sebelumnya yang dilakukan oleh Suryaningsum, dkk.(2008), Suryaningsum, dkk.(2005) dan Suryaningsum dan Trisniwati (2003). Penelitian ini berbeda dari ketiga penelitian sebelumnya dengan memasukkan variabel lama  masa studi mahasiswa sebagai variabel dependen.  Penelitian ini dimaksudkan untuk mencari jawaban atas fenomena lama penyelesaian masa studi dan keterkaitannya dengan variabel kecerdasan emosional, perilaku belajar, dan tingkat stres mahasiswa akuntansi di perguruan tinggi. Penelitian ini dilaksanakan di Jurusan Akuntansi Universitas Brawijaya Malang. Populasi penelitian ini adalah mahasiswa Jurusan Akuntansi Universitas Brawijaya Malang, angkatan 2006, 2007, dan 2008 atau dengan kata lain  yang telah menempuh masa studi lebih dari 4 tahun (8 semester). Teknik pengambilan sampel menggunakan  purposive sampling. Data penelitian diperoleh melalui kuesioner. Penelitian ini dilakukan dengan menggunakan analisis regresi linear berganda sebagai satu model analisis.Hasil penelitian menunjukkan bahwa variabel perilaku belajar dan stress kuliah berpengaruh signifikan terhadap keterlambatan penyelesaian studi, sedangkan variabel kecerdasan emosional tidak berpengaruh secara signifikan.   Kata kunci : perilaku belajar, kecerdasan emosional, stres kuliah, keterlambatan penyelesaian studi.
Co-Authors A.A. Ketut Agung Cahyawan W Anwar Muqorobin Arif Santoso Bagus Budiwantoro Dodi Sofyan Arief, Dodi Sofyan Estiko Rijanto Helmy Adam Hendri Maja Saputra Midriem Mirdanies Muflihana, Afdila Muhammad Kasim Pudji Irasari Rizqi Andry Ardiansyah Roni Permana Saputra Vita Susanti ZULKARNAIN ZULKARNAIN