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All Journal Bulletin of Electrical Engineering and Informatics Jurnal Teknik Mesin Explore: Jurnal Sistem Informasi dan Telematika (Telekomunikasi, Multimedia dan Informatika) Bulletin of Electrical Engineering and Informatics Bulletin of Electrical Engineering and Informatics JURNAL CRANKSHAFT Jurnal Teknik Mesin Indonesia Nusantara: Jurnal Pendidikan Indonesia International Journal of Innovation in Mechanical Engineering and Advanced Materials Media Penelitian dan Pengembangan Kesehatan Journal of Applied Science and Advanced Engineering Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin KOLECER: Scientific Journal of Mechanical Engineering IJOMEST : International Journal of Mechanical Engineering Science and Technology
Muhammad Riza
Universitas Bandar Lampung
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Other

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Experimental Development of a PIC-Based Intelligent Energy Management Controller for Voltage Regulation and Load Prioritization in Standalone Photovoltaic Home Systems Rifki Muhida; Ari Legowo; Muhammad Riza; Erry Y. T. Adesta; Riza Muhida
Journal of Applied Science and Advanced Engineering Vol. 4 No. 2 (2026): JASAE: September 2026
Publisher : Master Program in Mechanical Engineering, Gunadarma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59097/jasae.v4i2.88

Abstract

This paper presents the experimental development and evaluation of a PIC16F877A-based intelligent controller for voltage regulation and load prioritization in standalone photovoltaic (PV) home energy systems. The proposed system integrates a photovoltaic panel, battery storage, inverter, and embedded controller into a unified platform for efficient energy management. The controller continuously monitors battery voltage using an analog-to-digital converter and implements a threshold-based control strategy to disconnect non-critical loads when the voltage drops below 11.7 V. Experimental results show that the PV system maintains stable voltage characteristics within approximately ±3%, while the output current varies significantly with solar irradiance, exhibiting fluctuations of more than 60% under varying environmental conditions. The proposed controller effectively regulates system operation by dynamically managing load distribution, thereby preventing deep battery discharge and improving overall system reliability. In addition, the integration of auxiliary subsystems, such as automatic lighting and motion detection, enhances energy efficiency by reducing unnecessary power consumption. The findings demonstrate that the proposed low-cost PIC-based controller provides a practical and effective solution for intelligent energy management in standalone PV systems, particularly in off-grid residential applications.
Design and Performance Evaluation of a Low-Cost Portable Rotary Cutting Machine for Sugar Palm Inflorescence Stalk Trimming Riza Muhida; Muhammad Riza; Erry Yulian Triblas Adesta; Mochamad Ibnu Safari; Maman Abdurohman; Rifki Muhida; Ari Legowo
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol. 8 No. 2 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v8i2.38641

Abstract

Sugar palm (Arenga pinnata) sap tapping still relies on manual trimming of the inflorescence stalk surface using a machete. Although rotary cutting devices have been studied for several agricultural materials, quantitative evidence for a low-cost handheld machine specifically designed for sugar palm inflorescence stalk trimming is still limited. This study designed, fabricated, and evaluated a portable low-energy rotary cutting machine that integrates a rotary disc blade, DC worm gear motor, worm gearbox, rechargeable lithium battery, and protective blade cover. The novelty of the study is the task-specific evaluation of cutting time, operational capacity, energy consumption, battery-based trimming capacity, and prototype cost for smallholder sap tapping. Manual and machine-assisted trimming were compared using 20 repetitions for each method. The average cutting time decreased from 22.4 ± 1.1 to 6.8 ± 0.6 s/stalk, corresponding to a 69.64% reduction and 3.29 times faster operation than manual trimming. Operational capacity increased from 160.7 to 529.4 stalks/hour. The machine operated at 10.8 V and 0.95 A, requiring 10.26 W and 0.0194 Wh/stalk. A fully charged 10.8 V, 4.8 Ah battery can theoretically support approximately 2675 trimming operations before complete drainage. The prototype material cost was Rp 433,000, equivalent to approximately USD 24.25 using an exchange rate of Rp 17,856/USD. The results indicate that the developed device is a feasible low-cost and low-energy mechanization option for repetitive sugar palm inflorescence stalk trimming.
Effect of Fillet Radius at the Shank-to-Body Transition on the Local and Global Structural Responses of a Lifting Hook Adriansyah Adriansyah; Khaidir Khaidir; Muhammad Riza; Chiena L. Palconite; Risal Abu
International Journal of Mechanical Engineering Science and Technology Vol. 1 No. 2 (2026): IJOMEST: International Journal of Mechanical Engineering Science and Technology
Publisher : Asosiasi Diseminasi Rekayasa Dan Inovasi Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67795/ijomest.v1i2.29

Abstract

Geometric modifications of lifting hooks are generally evaluated based on changes in stress at the modified region; however, a reduction in local stress does not necessarily produce a corresponding change in the global response of the hook. This study evaluates the effect of fillet radius at the transition between the shank and hook body on the local and global structural responses. Four fillet radii, namely 5, 10, 15, and 20 mm, were analyzed using the finite element method in ANSYS Static Structural with AISI 1045 Hot Rolled steel under a static load of 49,050 N. The reliability of the model was evaluated through mesh convergence analysis and comparison with an analytical stress concentration factor approach. The results show that increasing the fillet radius from 5 to 15 mm reduced the local stress at the fillet by 15.59%, from 68.49 MPa to 57.81 MPa, whereas a further increase to 20 mm did not produce an additional reduction. In contrast, the maximum global stress occurring at the inner bowl surface changed by only 0.25%, from 138.15 to 138.49 MPa, resulting in a relatively constant factor of safety in the range of 2.383–2.389. The maximum deformation also changed by only 0.69% across the range of fillet radii. These results indicate that the fillet radius has a more pronounced effect on the local stress response than on the global structural response. Therefore, a reduction in stress at the fillet region alone is insufficient to demonstrate an improvement in the overall strength of the lifting hook, particularly when the modified region is not the location of maximum stress. Evaluation of geometric modifications in lifting hooks should therefore consider the location of critical regions and distinguish between local and global structural responses.
Co-Authors Adriansyah Adriansyah Agung Harsoyo Akbar Saputra, Fauzi Anwar, Muhammad Adam Permana Any Nurhasanah Apriansah, Muhammad Agung Aqshal Roihan Muhammad Irham Ari Legowo Ari Legowo Ari Legowo Ari Legowo Arizon, Muhammad Aryana, Rifqi Dwi Avicenna Avicenna Azmi, Vio Al Bambang Pratowo Chiena L. Palconite Dandi Efendi Dewi Fitria Eko Eryando Erry Y. T. Adesta Erry Yulian T. Adesta Erry Yulian Triblas Adesta Erry Yulian Triblas Adesta Farhan Alfarizi Azmi Febriyansyah, Rio Handoko Riyanto Handoko Riyanto Haris Murwadi Harjono Saputro Haryanto, Gedeon Risky Huminsa Ranto Morison Panjaitan Ilhamsyah, Sofyan Indra Surya Indra Surya, Indra Intan Nurina Seftiniara Islamiyati Islamiyati Julleo Caecar Onasis Pangihutan Khaidir Khaidir Kunarto Kunarto Kunarto Maman Abdurohman Mochamad Ibnu Safari Muhamad, Zein Muhammad Ilham Miranto Mulyana Mulyana Mulyana Mulyana Mulyana Mulyana Mulyana Mulyana Mulyana, Mulyana Pamungkas, Readyn Tri Prasetyo, M Rembagus Prayoga, Gilang Prayoga, Made Ngurah Arya Nanda Priatama, M Restu Rifki Muhida Rifki Muhida Risal Abu Riyanto, Handoko Riza Muhida Sadiman Sadiman Satriadi, Satriadi Suherman, Andrian Teng jaya, Roy Harmapa Tia Tanjung Wahid, Firman Nur Wicaksono, Bagus Wijayandi, Afriunus Yanuar Dwi Prastyo Yoga Tri Wijayanti Zainab Ompu Jainah Zakaria, Rahmat Zein Muhamad Zein Muhamad