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Agus Widyianto
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Jl. Mandung, Serut, Pengasih, Kec. Wates, Kabupaten Kulon Progo, Daerah Istimewa Yogyakarta 55651
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Journal of Automotive and Mechanical Applied Technology
Published by Universitas Negeri Yogyakarta
ISSN : -     EISSN : 30897793     DOI : https://doi.org/10.21831/jamat.v1i1
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Focus and Scopes The Journal of Automotive and Mechanical Applied Technology (JAMAT) is dedicated to disseminating original research, reviews, and case studies that contribute to the advancement of automotive engineering and mechanical technology. The journal provides a platform for academics, researchers, and practitioners to share innovative ideas, methodologies, and applications in the fields of automotive and mechanical engineering. Scope Areas: Automotive Engineering Advanced vehicle design and development. Powertrain and propulsion technologies (internal combustion engines, hybrid, and electric vehicles). Automotive safety systems and crashworthiness. Autonomous and connected vehicle technologies. Vehicle dynamics, control systems, and diagnostics. Mechanical Engineering Applications Design, analysis, and manufacturing of mechanical systems. Thermodynamics, fluid mechanics, and heat transfer applications. Computational methods and simulations in mechanical engineering. Material science and advanced manufacturing techniques. Robotics and mechatronics. Applied Technologies Integration of Industry 4.0 in automotive and mechanical sectors. Sustainable and green technologies for mechanical and automotive systems. Maintenance and reliability engineering. Applications of AI and machine learning in automotive and mechanical fields. Focus: The journal accepts contributions from a wide range of sectors, including but not limited to: Academic research institutions. Automotive and mechanical industries. Governmental and non-governmental organizations involved in technology development. Articles can focus on theoretical studies, experimental research, applied projects, and reviews of emerging technologies. Submissions are encouraged to explore innovations, problem-solving techniques, and practical implementations that impact the industry and society.
Arjuna Subject : Teknik (semua kategori) - Teknik Otomotif
Articles 23 Documents
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Design and finite element analysis of a portable bus service ramp to reduce dependence on service pits Novian Dhamas Ramadhan; Muhammad Alfarizi; Agus Widyianto
Journal of Automotive and Mechanical Applied Technology Vol. 2 No. 2 (2025)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v2i2.2479

Abstract

This study aims to: (1) design and analyze a portable ramp to improve bus repair efficiency at PT. United Tractors Semarang Branch, (2) with a focus on facilitating repairs and reducing dependence on service pits. (3) This portable ramp is expected to overcome access constraints to the underside of buses, speed up repair time, and improve work safety for mechanics. This study uses the DMADV (Define, Measure, Analyze, Design, Verify) method to develop portable ramps. These stages include problem discovery, technical data collection, analysis of materials, 3D model design using SolidWorks, and verification using Finite Element Analysis (FEA) to ensure structural strength and compliance with safety standards. This study successfully designed and analyzed a portable ramp for bus repairs, capable of withstanding an operational load of 88,750 Newtons with a safety factor≥ 3.0, a maximum deformation of ≤ 5 mm, and a safe von Mises stress distribution. The selection of ASTM A36 Carbon Steel resulted in optimal strength and weight, as well as cost efficiency. The ramp design also meets workshop operational needs and improves repair process efficiency. This research successfully designed an optimal portable ramp for the PT. United Tractors Semarang Branch Workshop, considering operational efficiency and safety, ASTM A36 Carbon Steel was selected as the best material based on strength, weight, and cost. It is recommended to implement this portable ramp, along with technician training, maintenance system development, and expansion to other branches, to improve bus repair efficiency.
Performance analysis of rear under run protection device (RUPD) on truck based on vehicle safety standards in Indonesia Ethys Pranoto; Edi Purwanto
Journal of Automotive and Mechanical Applied Technology Vol. 3 No. 1 (2026)
Publisher : Universitas Negeri Yogyakarta

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

Abstract

The rear under-run protection device is an apparatus installed on goods vehicles with a rear section that is more than 700 millimeters above the road surface. The height disparity between two vehicles may lead to the passenger compartment of a smaller vehicle colliding with and sliding under the chassis of a larger vehicle. This device is mounted to reduce the risk of fatalities resulting from rear-end collisions. This study aims to evaluate the design of rear under-run protection devices on goods vehicles to determine whether they meet the prerequisites set forth in the applicable Indonesian regulations. This is achieved by conducting modeling and testing simulations using software based on the finite element method. The evaluation results indicate that the underrun protection design satisfies several required technical criteria; however, non-conformities remain in structural dimensions and joint integrity, including a cross-member height of 80 mm (< 100 mm), a member length of 2200 mm (< 2300 mm), a cross-bar deflection reaching 419.5 mm (exceeding the ≤ 400 mm limit), and the use of welded joints instead of the required bolt–nut connections. Consequently, structural and mounting system modifications are necessary to achieve full compliance with the applicable standards.
ArUco Marker-Based autonomous UAV navigation for reconnaissance operations in urban terrain environments Cahya Pradika; Imanuel Dindin; Erzi Agson Gani; Ardan Nagra Coutsar; Mochamad Riza Pratama
Journal of Automotive and Mechanical Applied Technology Vol. 3 No. 1 (2026)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamat.v3i1.3018

Abstract

This study demonstrated the feasibility of autonomous UAV navigation in GPS-denied indoor environments using ArUco marker-based visual localization integrated with a VL53L1X LiDAR sensor and PX4 Offboard control. The developed system successfully validated markers, performed real-time pose estimation, and navigated sequentially through waypoints without human intervention. The web-based monitoring interface and QGroundControl integration operated reliably throughout all trials, enabling effective dual-platform telemetry monitoring and manual setpoint adjustment from a safe standoff position. The ArUco-marker-based detection, implemented using the OpenCV DICT_5×5_250 dictionary, validated marker identities within a functional altitude range of 40 to 200 cm. Third, across 61 trials discrete movement samples spanning four path configurations—straight-axis, lateral-right, lateral-left, and compound multi-direction—the system achieved an overall navigation success rate of 70%. Navigation failures caused by synchronization lag between UAV translational velocity and the camera’s image processing frame rate, which prevented timely marker validation during high-speed maneuvers. These results confirm that ArUco marker-guided UAV navigation is a viable, low-infrastructure solution for initial indoor reconnaissance in GPS-denied military environments, and establish a quantitative baseline for future enhancements, including precision landing algorithms and dynamic marker placement strategies.

Page 3 of 3 | Total Record : 23

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