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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) IAES International Journal of Artificial Intelligence (IJ-AI) Jurnal Teknik ITS IPTEK Journal of Proceedings Series Jurnal EECCIS Proceeding of the Electrical Engineering Computer Science and Informatics BAREKENG: Jurnal Ilmu Matematika dan Terapan Indonesian Physical Review JEECAE (Journal of Electrical, Electronics, Control, and Automotive Engineering) Journal of Robotics and Control (JRC) Indonesian Journal of Electrical Engineering and Computer Science International Journal of Artificial Intelligence and Robotics (IJAIR) Jurnal Nasional Aplikasi Mekatronika, Otomasi dan Robot Industri (AMORI) Sewagati
Katherin Indriawati
Departemen Teknik Fisika Institut Teknologi Sepuluh Nopember
Aerospace Engineering Arts Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Comparative analysis of Cohen-Coon and Ziegler-Nichols tuning methods for three-phase induction motor with speed sensorless control Halim, Christian Vieri; Indriawati, Katherin
Indonesian Journal of Electrical Engineering and Computer Science Vol 39, No 2: August 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v39.i2.pp885-895

Abstract

The use of speed sensors in the speed controller of three-phase induction motors affects the reliability of the induction motors. In addition, the drive engine that is often used in industry is a three-phase induction motor. So, speed sensorless control is needed for induction motors to achieve the best performance. This study uses a discrete disturbance observer (D0) as feedback on the speed sensorless control. The controller used in this method is a discrete PI with the Cohen-Coon (CC) and Ziegler-Nichols (ZN) tuning method. The purpose of this study is to obtain a comparative analysis of the CC and ziegler nichols tuning method using a discrete PI on the speed sensorless control scheme with torque load variation. This study was carried out experimentally using an Alliance AY3A-90L4 induction motor. The results show that the CC tuning method is better under parameter efficiency and robustness against disturbance and ZN is better under parameter reliability.
THE APPLICATION OF PLASTIC FIBER OPTIC SENSOR AS BLOOD PRESSURE MONITORING Ama, Fadli; Hatta, Agus Muhamad; Indriawati, Katherin; Agustiyanto, Frans R; Usamah, Shofi Afghania; Putra, Alfian Pramudita; Perkasa, Sigit Dani
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.395

Abstract

Continuous blood pressure monitoring is essential for early hypertension prevention and cardiovascular disease diagnosis. Traditional methods are unsuitable for long-term use due to discomfort and limited portability. This study presents a tapered plastic fiber optical sensor (PFOS) as a sustainable, non-invasive solution for continuous monitoring. The PFOS system employs a light modulator based on mechanical waves to detect arterial pressure changes, utilizing an infrared light source (940 nm). The cuffless design includes four configurations: Bend, Bend with 1 Scratch, Bend with 3 Scratches, and Straight with 3 Scratches. The Bend with 1 Scratch configuration demonstrated superior performance, achieving 99.84% accuracy, a mean absolute error (MAE) of 0.1564, a linearity of 0.9999, and a sensitivity of 2.9997 Hz/dBm. Experimental validation involved testing radial and brachial arteries. Blood pressure estimates from Pulse Transit Time (PTT) were compared to a standard sphygmomanometer. On the radial artery, the Bend with 1 Scratch configuration achieved the best results, with the lowest MAE (1.72 for SBP, 2.39 for DBP) and highest accuracy (98.30% for SBP, 96.56% for DBP). The Straight with 3 Scratches configuration performed best on the brachial artery, with an MAE of 2.81 for SBP and 5.11 for DBP, and accuracies of 97.21% for SBP and 92.67% for DBP. The PFOS system offers a promising option for continuous monitoring in clinical and home settings.  
RETRACTION NOTICE TO “PID PATH FOLLOWING CONTROL SYSTEM DESIGN ON UNMANNED AUTONOMOUS FORKLIFT PROTOTYPE” [BAREKENG: J. Math. & App., vol. 18(4), pp. 2093-2112, Dec. 2024] Herlambang, Teguh; Nurhadi, Hendro; Indriawati, Katherin; Akbar, Reza Maliki
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 20 No 2 (2026): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol20iss2pp1791

Abstract

This article has been retracted: please see Elsevier’s Article Correction, Retraction and Removal Policy (https://www.elsevier.com/about/policies-and-standards/article-withdrawal). This article has been retracted at the request of the Editor-in-Chief and the authors. After publication, the Editorial Office received documented communications indicating concerns about the provenance, authorship/attribution, and permission to publish the content. The journal’s assessment concluded that the published paper exhibits substantial overlap with an earlier academic work (a prior thesis deposited in an institutional repository) and that the reuse/publication of that material was not properly authorized and/or was insufficiently disclosed and attributed during the submission process. These matters fall within circumstances where retraction is appropriate to safeguard the integrity of the scholarly record, including situations involving copyright-related concerns and serious breaches of publication ethics. The retraction is issued to maintain the clarity, transparency, and integrity of the scholarly record. The journal apologizes to readers for any inconvenience caused. All authors have been informed of this retraction and agree to it. Supporting documentation, including signed statements of consent to retract from all authors, is available via a Google Drive folder link that has been provided to the Editorial Office (see documents in this link).
A comparative study of pi and eems on emu for hybrid fuelcell power systems Ekatiara, Cindy Reviko; Indriawati, Katherin
Jurnal Nasional Aplikasi Mekatronika, Otomasi dan Robot Industri (AMORI) Vol. 4 No. 1 (2025): July
Publisher : Faculty of Vocational Studies - Research Center, DRPM ITS

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

Abstract

This study investigates the Energy Management Unit (EMU) for a hybrid power system integrating PEMFC, batteries, supercapacitors, and Photovoltaic (PV) as renewable energy sources. The EMU is designed to support power supply, reduce the load on the PEMFC, and enhance operational efficiency and reliability. It intelligently manages power distribution by adjusting the use of energy sources based on system conditions, such as battery state of charge (SOC), load changes, or PV energy availability. Two types of management algorithms used in the EMU were tested: Proportional Integral (PI) and External Energy Management Strategy (EEMS). The comparison results show that EEMS outperforms PI in terms of stability and efficiency, with an average efficiency of 88.85% for EEMS compared to 88.77% for PI. Furthermore, the EEMS method demonstrates superior performance by maintaining minimal fluctuations ranging from 0.02 to 0.03, even under dynamic load conditions, while the PI method shows greater fluctuations, varying between 0.05 and 0.08.
Co-Authors Achmad Jazidie Agustiyanto, Frans R Akbar, Reza Maliki Akhmad Ibnu Hija Alfian Pramudita Putra Ama, Fadli Andri Haris Setyawan Ariefianto, Rizki Mendung Aufa, Ardyas Nur Aulia Siti Aisjah Bambang L. Widjiantoro Bambang Lelono Widjiantoro Bambang Lelono Widjiantoro Dea Faiza Febrianty Detak Yan Pratama Ekatiara, Cindy Reviko Febry Pandu Wijaya Fikri Nurhidayat Gregorius Kevin Halim, Christian Vieri Hanifa Hanifa Hanifa Hartati, Ayu Dian Hatta, Agus Muhamad Hendro Nurhadi Hilton Tnunay, Hilton Ikma Lailatul Badriyah Ikma Lailatul Badriyah Kurnia Ma'rifatin Pebriningtyas Luthfansyah Mohammad Mega Permatasari, Shervind Maharani Mohammad Harwin Prayoga Mohammad Kamalul Wafi Mohammad Kamalul Wafi Mohmmad Kamalul Wafi Mufit, Choirul Muhammad Khamim Asyari Musyafa’, Ali Nawangsih, Nawangsih Ontoseno Penangsang Pandu Wijaya, Febry Perkasa, Sigit Dani Purwadi Agus Darwito Rahmawan, Hanif Adi Ruri Agung Wahyuono Salma Qotrunnada Sitepu, Simion Suyanto, Suyanto Syahrul Munir Syamsul Arifin Teguh Herlambang Trihastuti Agustinah Tulus Indra Hermawan Usamah, Shofi Afghania Wafi, Moh Kamalul Wahyuadnyana, Kadek Dwi Widjianto, Bambang Lelono Widjiantoro, Bambang L. Yaumar Yaumar Ya’umar