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All Journal Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) SISFOTENIKA
Reihan Diaz Pramudya
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management 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
JURAL 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.
Evaluasi Protokol Komunikasi Berbasis Web dan Non-Web pada Sistem IoT: Suatu Systematic Literature Review: Web-based and Non-Web-based IoT Communication Protocols: A Systematic Literature Review Muhammad Naufal Nashir; Elya Syafa’atun Ni’mah; Maulana Fathurahman; Reihan Diaz Pramudya; Arief Arfriandi
SISFOTENIKA Vol. 16 No. 1 (2026): SISFOTENIKA
Publisher : STMIK PONTIANAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30700/sisfotenika.v16i1.595

Abstract

Perkembangan Internet of Things (IoT) menuntut penggunaan protokol komunikasi yang efisien, aman, dan mampu beradaptasi dengan keterbatasan perangkat serta kebutuhan integrasi layanan modern. Penelitian ini melakukan Systematic Literature Review (SLR) terhadap tiga puluh artikel primer untuk mengevaluasi karakteristik dan efektivitas protokol komunikasi berbasis web dan non-web pada ekosistem IoT. Proses SLR disusun menggunakan kerangka Population, Intervention, Comparison, Outcomes, dan Context (PICOC) untuk merumuskan pertanyaan penelitian, menentukan cakupan kajian, serta mengidentifikasi literatur relevan. Seleksi studi dilakukan melalui penyaringan sistematis, penilaian kualitas, dan ekstraksi data. Analisis memetakan protokol berdasarkan pola komunikasi, transport layer, serta karakteristik operasional, kemudian membandingkan efektivitasnya pada empat aspek kunci: performa, efisiensi energi, skalabilitas, dan keamanan. Hasil kajian menunjukkan bahwa protokol non-web seperti Message Queuing Telemetry Transport (MQTT) dan Constrained Application Protocol (CoAP) memberikan latensi rendah, konsumsi energi minimal, serta efisiensi komunikasi tinggi pada perangkat resource-constrained. Sebaliknya, protokol berbasis web seperti Hypertext Transfer Protocol/Representational State Transfer (HTTP/REST), WebSocket, Web of Things (WoT), dan Matter unggul dalam interoperabilitas, integrasi layanan cloud, serta dukungan keamanan berbasis Transport Layer Security (TLS) dan autentikasi berbasis token. Studi ini menyimpulkan bahwa arsitektur IoT modern cenderung mengadopsi pendekatan hybrid yang menggabungkan protokol non-web pada lapisan perangkat dengan protokol web pada lapisan aplikasi untuk mencapai kinerja dan keandalan sistem yang optimal.
Co-Authors Arief Arfriandi Arief Muhammad Luthfi Yanuar Elya Syafa’atun Ni’mah Fuqaha Asnan Said Jilan Ma’rifat Al Faiz Maulana Fathurahman Muhammad Naufal Nashir Tatyantoro Andrasto