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All Journal JE-Unisla Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Jurnal Penelitian Rumpun Ilmu Teknik
Tatyantoro Andrasto
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Aplikasi Metode Root-Locus dengan Aproksimasi Padé untuk Analisis Pengaruh Time Delay pada Kestabilan Sistem Kendali Arief Muhammad Luthfi Yanuar; Fuqaha Asnan Said; Reihan Diaz Pramudya; Jilan Ma’rifat Al Faiz; Tatyantoro Andrasto
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 4 No. 2 (2025): Agustus : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v4i2.5467

Abstract

Control systems with time delays introduce system stability problems because time delays cause exponential effects to the system response. Conventional root-locus methods cannot be used directly on systems with delays due to irrational mathematical forms. This study analyzes the shifting effect of time delay on the stability of linear control systems by using the first-order Padé approach to enable the application of the root-locus method. The system model used is a second-order linear system with a transfer function of , and is analyzed under conditions without delay and with delays of 0.5, 1, and 1.5 seconds. Simulations were performed using MATLAB software. The results show that the addition of delay causes a right pole shift of the imaginary axis, reduces the stability margin of the system, and results in a more oscillative response as well as a longer time for the system to stabilize. The first-order Padé approach is shown to be effective in facilitating the visual analysis of stability in time-delayed systems. The findings make a practical contribution in adapting classical analysis techniques to the needs of modern control systems and can be widely applied in the development of network-based control systems, industrial automation, and real-time control.
Analisis dan Perencanaan Pencahayaan Buatan pada Toko Kelontong Menggunakan DIAlux Evo 12.0 Ahmad Yusif; Riana Defi Mahadji Putri; Muhammad Harlanu; Tatyantoro Andrasto
Jurnal Penelitian Rumpun Ilmu Teknik Vol. 4 No. 2 (2025): Jurnal Penelitian Rumpun Ilmu Teknik
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juprit.v4i2.4931

Abstract

A grocery store must consider the comfort of people engaging in activities within it, one of which is lighting. Good lighting is an essential part of visual comfort. According to SNI 6197:2020, the standard illumination level for grocery stores is 300 lux. However, initial measurements revealed that during nighttime, the illumination level in the grocery store did not meet the standard, with an average measured illumination level of only 35 lux. Based on this issue, this study aims to determine the appropriate lighting design for grocery stores through analysis using the DIAlux EVO 12.0 software. This research employs the ADDIE research and development model, which comprises five stages: analysis, design, development, implementation, and evaluation. The results of the study, following development using the DIAlux EVO 12.0 software, indicate that five lighting points are required in the grocery store using Philips LED Bulb 19-watt Cool Daylight lamps. After implementation, re-measurements showed that the average nighttime illumination level reached 308 lux. Therefore, the research and development on lighting levels in the grocery store can be considered successful, as it significantly improved lighting in areas or conditions with illumination levels below the Indonesian National Standard.
Analisis Stabilitas Sistem Kendali Linier Menggunakan Routh-Hurwitz dan Nyquist dengan Implementasi MATLAB: Studi Kasus pada Sistem Otomasi Mualfi Fahrul Fanani Sachroni; Dwi Alvin Hidayat; Muammar Rendra Citra Alfredo; Tatyantoro Andrasto
Jurnal JE-UNISLA : Electronic Control, Telecomunication, Computer Information and Power System Vol 10 No 2 (2025): SEPTEMBER
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/je-unisla.v10i2.1442

Abstract

Stabilitas merupakan aspek fundamental dalam sistem kendali linier, yang menentukan apakah sistem akan merespons input secara terkendali atau tidak. Penelitian ini bertujuan untuk membandingkan efektivitas dua metode klasik analisis kestabilan, yaitu Routh-Hurwitz dan Nyquist, dalam mengevaluasi sistem kendali linier berbasis fungsi alih. Satu model sistem uji digunakan untuk menguji keandalan kedua metode dalam simulasi MATLAB. Hasil menunjukkan bahwa metode Routh-Hurwitz secara cepat mengklasifikasikan kestabilan melalui tabel evaluasi, ditandai dengan tidak adanya perubahan tanda pada kolom pertama, yang mengindikasikan sistem stabil. Sementara itu, metode Nyquist menunjukkan kurva yang tidak mengelilingi titik kritis –1, menandakan bahwa sistem dalam kondisi stabil. Kedua metode memberikan hasil yang konsisten, Routh-Hurwitz lebih unggul dalam efisiensi numerik pada sistem orde rendah, sedangkan Nyquist menyajikan visualisasi margin kestabilan yang lebih komprehensif. Dengan demikian, kombinasi keduanya dalam lingkungan MATLAB memberikan pendekatan yang komplementer dalam analisis kestabilan sistem kendali linier.
Co-Authors Ahmad Yusif Arief Muhammad Luthfi Yanuar Dwi Alvin Hidayat Fuqaha Asnan Said Jilan Ma’rifat Al Faiz Mualfi Fahrul Fanani Sachroni Muammar Rendra Citra Alfredo Muhammad Harlanu Reihan Diaz Pramudya Riana Defi Mahadji Putri