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All Journal Jurnal Elkolind : Jurnal Elektronika dan Otomasi Industri Mathema: Jurnal Pendidikan Matematika
Muchlis Fajar Hidayat
Politeknik Negeri Malang
Control & Systems Engineering Electrical & Electronics Engineering Mathematics

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Performance Evaluation of Fuzzy Logic–Enhanced Perturb and Observe MPPT for Photovoltaic Systems M. Hilmi`; Muchlis Fajar Hidayat; Rijalul Haq; Brahma Ratih Rahayu Fakhrunnia
Jurnal Elektronika dan Otomasi Industri Vol. 13 No. 1 (2026): Jurnal Elkolind Vol. 13, No. 1, 2026 (Mei 2026)
Publisher : Program Studi Teknik Elektronika Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elkolind.v13i1.9705

Abstract

Maximum Power Point Tracking (MPPT) is a crucial technique to optimize energy extraction in photovoltaic (PV) systems under varying environmental conditions such as irradiance and temperature. The conventional Perturb and Observe (P&O) algorithm is widely used due to its simplicity; however, it suffers from steady-state oscillations and slow response to environmental changes. This study proposes an improved MPPT method by integrating a fuzzy logic controller (FLC) with the conventional P&O algorithm to generate an adaptive step size for duty cycle adjustment. The system is modeled and simulated using MATLAB/Simulink, including a PV array and a boost converter, under different operating conditions such as constant irradiance, varying irradiance, and temperature variations. The performance of both methods is evaluated based on output power, voltage and current ripple, efficiency, and dynamic response. The simulation results show that the proposed FLC–P&O method reduces voltage ripple from 5.24% to 2.33% and improves settling time from 6.312 ms to 1.872 ms. Therefore, the integration of fuzzy logic with the P&O algorithm provides a simple yet effective solution to improve MPPT performance in photovoltaic systems operating under dynamic environmental conditions.
Development of RCODE Learning Materials to Enhance Students’ Mathematical Creative Thinking Skills Based on Outcome-Based Assessment Adi Candra Kusuma; Doddy Maulana; Almas Adibah; Muchlis Fajar Hidayat
MATHEMA: JURNAL PENDIDIKAN MATEMATIKA Vol. 8 No. 2 (2026): MATHEMA
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jm.v8i2.2765

Abstract

This study aimed to develop RCODE learning materials based on Outcome-Based Assessment (OBA) to improve students’ mathematical creative thinking skills in Fourier series. The study employed a research and development approach based on the Plomp model, comprising the preliminary investigation, design, realization or construction, testing, evaluation, and revision phases. The developed products included a semester learning plan, student assignment plan, teaching module, student worksheets, a mathematical creative thinking skills test, observation sheets, a student response questionnaire, and validation instruments. A limited-scale trial was conducted involving 23 students enrolled in the Applied Bachelor’s Program in Electronics Engineering at the State Polytechnic of Malang. Data were collected through observations, interviews, questionnaires, and tests and were subsequently analyzed in terms of validity, practicality, and effectiveness. The validation results yielded an average score of 3.38 (82.5%), which was categorized as highly valid. The practicality assessment yielded an average score of 3.38 (84.5%), indicating that the learning materials could be implemented effectively and received positive responses from the students. The students’ average score increased from 56.78 on the pretest to 83.58 on the posttest, with an N-Gain score of 0.62, which was classified as moderate. The average achievement score for the indicators of mathematical creative thinking skills was 8.17. Therefore, the OBA-based RCODE learning materials were considered valid, practical, and effective in improving students’ mathematical creative thinking skills
Co-Authors Adi Candra Kusuma Almas Adibah Brahma Ratih Rahayu Fakhrunnia Doddy Maulana M. Hilmi` Rijalul Haq