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All Journal Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) Proceeding of the Electrical Engineering Computer Science and Informatics JTERA (Jurnal Teknologi Rekayasa) International Journal of Applied Sciences and Smart Technologies Abdimas Altruis: Jurnal Pengabdian Kepada Masyarakat Jurnal Nasional Teknik Elektro dan Teknologi Informasi International Journal of Hydrological and Environmental for Sustainability Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Prosiding Seminar Nasional Ilmu Sosial dan Teknologi (SNISTEK) Widya Teknik
Bernadeta Wuri Harini
Universitas Sanata Dharma
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Prototipe Alat Pengekstrak Kunyit Otomatis Menggunakan Aktuator Motor DC Bernadeta Wuri Harini; Rini Dwiastuti; Y. B. Savio Surya Amanda
Widya Teknik Vol. 15 No. 1 (2016)
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v15i1.1469

Abstract

Di dalam kunyit terdapat kurkuminoid dengan kandungan utama berupa kurkumin. Pada penelitian sebelumnya telah dibuat alat ukur kadar kurkuminoid portabel. Sebelum kadar kurkumin diukur, kunyit harus diekstrak dahulu. Oleh karena itu dalam penelitian ini dibuat prototipe alat pengekstrak kunyit otomatis. Alat pengesktrak otomatis terdiri dari motor DC sebagai komponen utama penumbuk kunyit. Setelah kunyit selesai ditumbuk maka mikrokontroler akan mengaktifkan solenoid valve sehingga cairan etanol keluar ke tempat penumbuk kunyit sehingga kunyit larut dalam etanol. Larutan ini kemudian diukur absorbansinya menggunakan alat ukur spektrofotometer. Hasil pengukuran kemudian dibandingkan dengan hasil pengekstrakan kunyit secara manual. Sampel kunyit yang diambil adalah satu ruas kunyit pada bagian pangkal, tengah dan ujung. Dari hasil pengukuran ekstraksi secara manual, ekstrak kunyit pada bagian pangkal mempunyai absorbansi sebesar 1,083, bagian tengah 0,888 dan bagian ujung 0,62. Hasil ekstraksi secara otomatis menunjukkan semakin lama penumbukan maka error absorbansi semakin kecil. Penumbukan selama 15 detik diperoleh error absorbansi sebesar 66,76% dan penumbukan selama 3 menit 26,87%. Dengan hasil ini maka dapat diketahui bahwa proses penumbukan optimal dalam waktu 5 menit. Dengan penambahan proses pelarutan maka total waktu yang dibutuhkan adalah sekitar 8 menit. Waktu proses pengekstrakan secara otomatis ini lebih singkat daripada proses pengekstrakan secara manual (15 menit).
Waste Sorting Machine Automatic of Organic and Inorganic Using Arduino Mega as Microcontroller : Implication for Environmental Sustainability Harini, Bernadeta Wuri; Edy, Benediktus Yudha; Haryanto, Agustinus Surya; Martanto, Martanto; Prabowo, Petrus Setyo; Prabowo, Ignatius Adi
International Journal of Hydrological and Environmental for Sustainability Vol. 3 No. 2 (2024): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v3i2.449

Abstract

Increasing waste production worldwide has become a serious environmental and social problem. Waste thrown into traditional landfills can pollute land and water, cause public health problems, and produce greenhouse gas emissions.  To overcome the issues above, in this research, a waste sorting machine will be designed that can sort organic and inorganic waste. This sorting is done automatically, a person only needs to put the waste into the machine, and then the waste will be separated according to its category.  The organic and inorganic waste sorting system consists of 5 sub-systems.  They are metal waste, glass waste, dry waste, plastic waste, and wet waste sorting.  The results of this study can produce a success rate of 66.7% in detecting the occupancy of the trash bin, 70% in sorting metal waste, and 44.4% in sorting glass waste.  The success rate in sorting wet waste is 40%, while in sorting plastic waste is 70%, and in dry waste is 90%.
Some Permanent Magnet Synchronous Motor (PMSM) Sensorless Control Methods based on Operation Speed Area Harini, Bernadeta Wuri
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol. 7 No. 1 (2021): April
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/jiteki.v7i1.20519

Abstract

This paper compares some sensorless Permanent Magnet Synchronous Motor (PMSM) controls for driving an electric vehicle in terms of operating speed. Sensorless control is a type of control method in which sensors, such as speed and position sensors, are not used to measure controlled variables.  The controlled variable value is estimated from the stator current measurement. Sensorless control performance is not as good as a sensor-based system. This paper aims are to recommend a control method for the PMSM sensorless controls that would be used to drive an electric vehicle. The methods that we will discuss are divided into four categories based on the operation speed area.  They are a startup, low speed, high speed, and low and high-speed areas. The low and high-speed area will be divided into with and without switching.  If PMSM more work at high speed, the most speed area that is used, we prefer to choose the method that works at high speed, that is, the modification or combination of two or more conventional methods.
Pemanfaatan Minyak Jelantah sebagai Bahan Bakar Alternatif Ramah Lingkungan pada Kompor Rumah Tangga Suwarno, Djoko; Wiwien Widyastuti; Bernadeta Wuri Harini; Haris Sriwindono; Lukas Purwoto
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Pengabdian Kepada Masyarakat)
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Used cooking oil, which is often thrown away after use, can have a negative impact on the environment if not managed properly. Through a community service program implemented in Sidomoyo Village, Godean, Sleman, efforts were made to convert used cooking oil into biodiesel as an environmentally friendly alternative fuel for household stoves. This program aims to empower the community by providing knowledge and skills in processing used cooking oil, so that this waste can be reused productively and reduce environmental pollution. The process of converting used cooking oil into biodiesel involves a simple method that can be implemented by village communities at an affordable cost. The use of biodiesel in household stoves is expected to be an alternative energy solution that is economical and environmentally friendly, as well as supporting efforts to reduce domestic waste. The results of this activity show the enthusiasm of the community in adopting this technology, as well as increasing awareness of the importance of managing used cooking oil waste. It is hoped that this program can become a model of curiosity that is implemented in other villages.
Design of a Speed Sensorless Control System on a DC Motor using a PID Controller Harini, Bernadeta Wuri; Gunadi, Theodore Galeno; Mahardika, Shakuntala Gema; Pangestu, Sirilus Praditya; Putri, Regina Chelinia Erianda; Mardikus, Stefan
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 2, December 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i2.13271

Abstract

The speed sensorless control system on a DC motor is a DC motor speed control system that does not use a speed sensor to measure the motor speed. The motor speed value is estimated by an observer from the stator current and voltage that are measured using a sensor. This study uses an R observer method.  The difference between the estimated speed and the reference speed is then used by the PID controller to adjust the motor speed to match the desired reference speed. PID parameter tuning using heuristic method. With a setpoint of 6800 RPM and using a combination of Kp = 0.5, Ki = 0.05, and Kd = 0.34, a speed value of 6792.76 RPM was obtained. Sensorless motor speed control using a PID controller produces an optimal system with a low Steady State Error (SSE) value of around 0.1%, very small oscillations of 0.39%, a fast rise time of 4 seconds, and a fast settling time of 6 seconds.
Sistem Kendali Kecepatan Motor Arus Searah tanpa Sensor Kecepatan dengan Observer Metode R Harini, Bernadeta Wuri; Muda, Vincentius Hosea Pniel; Afrizal, Stefanus Derryan Vicky; Irwandi, Marcellius
JTERA (Jurnal Teknologi Rekayasa) Vol 10, No 2: Desember 2025
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v10.i2.2025.27-34

Abstract

Most industries control the motor speed to get the speed as desired speed. One method of controlling motor speed is a speed sensorless control system. In this study, a speed sensorless control system is designed to control the speed of a DC motor. In this system, the motor speed is not measured directly using a speed sensor installed on the rotor, but it’s calculated by an observer from the values of stator current and voltage that are measured using current and voltage sensors. In this study, the R method observer was used. The estimated speed will be compared with the reference speed. The On-off controller will process these speed differences to adjust the motor to have the same speed as the desired speed. In this study, a DC motor speed sensorless control system with an R method observer that has a performance lower than the L-R method will be investigated to determine whether it can control a DC motor well. The control system consists of an EG-530AD-2F CW DC motor, INA 219 current and voltage sensors, an L298N type DC motor drive, and an Arduino Uno microcontroller as the overall system processing tool. This study can prove that the R method observer with the addition of an On-off mode controller can control the motor speed with good performance. The system response has steady-state error characteristics of 0.59%, a maximum overshoot of 0.49%, a rise time of 1.3 seconds, and a settling time of 1.9 seconds.
Co-Authors Afrizal, Stefanus Derryan Vicky Arif, Irvan Ayu, Vittalis Bambang Soelistijanto Djoko Suwarno Djoko Untoro Suwarno Edy, Benediktus Yudha Feri Yusivar Gunadi, Theodore Galeno Haris Sriwindono Haryanto, Agustinus Surya Henricus Agung Hernawan Ignasius Eko Yuliyanto Ignatius Adi Prabowo Irvan Arif Irwandi, Marcellius J.B. Budi Darmawan Lukas Purwoto Lusia Krismiyati Budiasih Mahardika, Shakuntala Gema Martanto Martanto . Martanto Martanto Martanto Martanto Muda, Vincentius Hosea Pniel Nanda Avianto Wicaksono Pangestu, Sirilus Praditya Petrus Setyo Prabowo Putri, Regina Chelinia Erianda Rini Dwiastuti Stefan Mardikus Theresia Prima Ari Setiyani Tjendro Tjendro Tjendro Wicaksono, Nanda Avianto Wiwien Widyastuti Y. B. Savio Surya Amanda Yehezkiel Krisma Yusivar, Feri