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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Teknik Mesin Jurnal Teknoin Jurnal Teknik ITS IPTEK The Journal of Engineering IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal Edukasi dan Penelitian Informatika (JEPIN) JMES The International Journal of Mechanical Engineering and Sciences Mechanical Engineering for Society and Industry Automotive Experiences Sewagati
Agus Sigit Pramono
Departemen Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Sepuluh Nopember (ITS)
Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Steering System Kinematic and Steady-State Cornering Analyses of the ITS Electric Car Unggul Wasiwitono; Indra Sidarta; Agus Sigit Pramono; Sutikno Sutikno; Alief Wikarta
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.233

Abstract

Steering linkages play an important role in maneuvering of cars. In order to provide pure rolling of the road wheels and to reduce wear of the tires, the steering linkage must be able to turn the wheels such that their axis intersection point lies on the rear wheel axis. This condition is known as the Ackermann condition. However, in reality, Ackermann condition is difficult to satisfy for every cornering radius. The only effort we can do is to synthesize the linkage so that the Ackermann condition is satisfied for any turning radius as closely as possible. Hence, an appropriate kinematic model of the steering linkage is essential. The purpose of this research is to analyze the rack and pinion steering linkage for the ITS electric car prototype. From this analysis, the information on the steering linkage dimension and the placement of the steering linkage that give minimum steering error can be obtained. The steering error is defined as the difference between the actual angle made by the outer front wheel during steering maneuvers and the correct angle for the same wheel based on the Ackerman principle. In addition, the steady-state cornering behavior analysis is also conducted. From this analysis, the information of the center of gravity location that give better cornering characteristics can be obtained. Therefore, these analyses help and can be used as starting point to design the chassis and cabin for the ITS electric car prototype.
The Effect of Variation in the Number of Pole and Air Gap on Torque Density on Radial Magnetic Spur Gear with Magnetic Block Agus Sigit Pramono; Alfiana N Hidayati
JMES The International Journal of Mechanical Engineering and Sciences Vol 4, No 1 (2020)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v4i1.7828

Abstract

Magnetic gear is an alternative to mechanical gear, where the magnetic gear has the advantages of no noise, minimum vibration, no maintenance required, increased reliability, overload protection capability, no physical contact between gears, and the resulting torque density is still below the mechanical gear torque density. In this research, the variation of the number of poles and air gap in the amount of torque density produced was carried out. The permanent magnet material used is Neodymium type with a gear ratio of 1:2. In the variation of the number of poles used by pairs of 4 and 8 poles, 8 and 16 poles, 10 and 20 poles, and 12 and 24 poles, in the variation of the air gap used, namely 1 mm, 1.2 mm, 1.3 mm, 1.4 mm and 1.5 mm. Magnetic gear performance can be seen through analysis simulation with the 3D finite element method using Finite Elements Software. The type of simulation used is the magnetostatic analysis method at the processing stage and the transient analysis method at the post-processing stage. From the simulation results, it is concluded that the greater the number of poles, the greater the torque density produced, and the closer the air gap distance will result in a greater torque density. The effect of the number of poles on the torque density is more significant than the effect of the air gap.
Analisis Efektivitas Pelatihan Singkat 3D Modelling, 3D Scanning, dan 3D Printing pada Siswa SMA Achmad Syaifudin; Muhammad Khoirul Effendi; Agus Sigit Pramono; Yusuf Kaelani; Julendra Bambang Ariatedja; Dinny Harnany; Yohanes
Sewagati Vol 6 No 5 (2022)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (774.522 KB) | DOI: 10.12962/j26139960.v6i5.283

Abstract

Pada era revolusi industri 4.0, teknologi cetak tiga dimensi (3D printing) sedang berkembang pesat. Di Taiwan dan Korea Selatan, siswa sekolah menengah telah memiliki kemampuan menjalankan 3D printing. Sebaliknya di Indonesia, lulusan sekolah menengah belum memiliki kompetensi sejenis. Oleh sebab itu, tim Pengabdian Masyarakat dari departemen Teknik Mesin ITS memberikan pengenalan dasar teknologi cetak 3D untuk meningkatkan kompetensi siswa sekolah menengah. Pelatihan ini diberikan secara singkat kepada 29 siswa SMAN 1 Boyolangu, Tulungagung dengan persentase 25% berupa pemberian teori dasar dan 75% berupa praktik mengerjakan proses 3D modelling-scanning-printing. Berdasarkan analisis kuantitatif, pemahaman peserta meningkat sebesar 35.05% untuk materi 3D modelling dan 22.55% untuk materi 3D scanning dan printing. Adapun berdasarkan analisis kualitatif, hasil pencetakan produk 3D dengan metode 3D printing yang dikerjakan oleh peserta sudah cukup bagus. Hal ini menunjukkan bahwa kegiatan pelatihan singkat selama dua hari mampu meningkatkan kompetensi siswa SMA dalam memahami dasar teknologi manufaktur 3D printing.
Optimizing regenerative braking on electric vehicles using a model-based algorithm in the antilock braking system Budijono, Agung Prijo; Sutantra, I Nyoman; Pramono, Agus Sigit
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 14, No 1: March 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v14.i1.pp131-139

Abstract

The regenerative braking effectiveness of electric vehicles (EVs), with 8-25% range, requires designers to produce better braking systems. The antilock braking system (ABS) was chosen because it offers various advantages, such as enhanced safety considerations, vehicle maneuverability, and so on. The measurement findings revealed that ABS took longer to stop the wheels with the same wheel rotation speed. Because of the lesser differentiation of magnetic flux to time, it created lower induced emf in the generator. ABS 50 Hz performance was 19.5% at 4500 pm, whereas hydraulic brake performance was 21% at the same speed. ABS used model-based algorithms (MBAs) to boost the friction frequency with the wheels from 10 to 50 Hz. As the frequency increased, the ABS graph approached the hydraulic graph, and the ABS performance improved. Although ABS loses to hydraulics in stopping wheel rotation, it gains in saved energy and battery temperature. Longer wheel stop-times allow the rotational kinetic energy of the wheel more time to be converted into electricity.
Multi-Objective Prediction of Drilling EMS-45 with Finite Element, Backpropagation Neural Network, and Metaheuristic Model Effendi, Mohammad Khoirul; Pramono, Agus Sigit; Suhardjono, Suhardjono; Sampurno, Sampurno; Harnany, Dinny; Pratiwi, Fungky Dyan
JMES The International Journal of Mechanical Engineering and Sciences Vol 8, No 1 (2024)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v8i1.19269

Abstract

Making holes with the minimum thrust force and torque using a drilling machine is challenging for researchers because of the difficulties in setting input parameter such as the type of drill tool, point of angle, and feeding speed. Therefore, the trial-and-error method to predict optimum input parameters through experiment can be replaced with the Back Propagation Neural Network (BPNN) and metaheuristic method (i.e., genetic algorithm (GA) and Simulated Annealing (SA)) method to reduce costs and time. BPNN can be used to represent the input-output correlation precisely. However, obtaining a model with minimum Mean Squared Error (MSE) requires much data for training, testing, and validation. Since the obtained data from experiments requires expensive costs, combining data from experimental and simulation using ANSYS should considered to reduce the experimental costs. This study was then conducted to answer the research problem using an EMS 45 tool steel as the workpiece, with the three input parameters: type of drill tools (HSS M2 and HSS M35), the points of angle (118 and 134 degrees) and feeding speed rates (0.07 and 0.1 mm/s). The 32 data from experimental and modeling were used to model the correlation between the input and output parameters of the drilling process using BPNN. The BPNN’s network-model with minimum MSE is then used as the objective function to determine the input parameters to obtain the smallest value of thrust force and torque using the hybrid method using GA and SA.   
Development of an Automatic Coupler for Railway Vehicles: A Topology Optimization Approach with Numerical and Experimental Validation Valentino, Jean Mario; Pramono, Agus Sigit; Syaifudin, Achmad; Shalahuddin, Lukman; Perkasa, Mustasyar; Sasaki, Katsuhiko
Automotive Experiences Vol 7 No 3 (2024)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.11494

Abstract

Topology optimization has demonstrated its effectiveness in generating lightweight and structurally efficient designs. This study focuses on refining the geometry of an automatic coupler body for trains using solid isotropic material with penalization and a level set method. These optimization methods are applied to the numerical model of the automatic coupler, and their results are compared to select the optimal design. The tensile strength of the automatic coupler is examined through numerical simulations and validated by experimental tensile tests conducted on a 1:1 scale prototype. The optimization outcomes reveal a remarkable 46.41% reduction in the mass of the automatic coupler body compared to the initial model. An evaluation of the tensile strength of the prototype demonstrates the ability of the automatic coupler to withstand the primary load without undergoing plastic deformation. Furthermore, a strong correlation is observed between the numerical and experimental results. This research contributes to advancing the design of next-generation automatic couplers, emphasizing the crucial aspects of lightweight design and structural performance.
Investigation of discrepancies in isotropic material and structural properties in lattice frameworks Arifin, Ahmad Anas; Batan, I Made Londen; Bici, Michele; Wahjudi, Arif; Pramono, Agus Sigit
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.13018

Abstract

Lattice structures have developed as a vital component in advanced engineering applications due to their superior strength-to-weight ratios and adjustable mechanical properties. This paper focuses on examining the correlation between the isotropic features of lattices at the material level and their structural performance. The research used near-isotropic Crossing-cylinder (CC)- Body Centered Cubic (BCC) cells in various orientations and sizes. Both experimental analysis and finite element analysis were used to examine the compressive strength of the structure in each orientation. The results reveal that cell orientation is important for determining failure modes and mechanical performance at the structural level. At 0°, the lattice has higher compressive strength and energy absorption due to effective load transfer via CC-aligned struts. In contrast, higher orientations (e.g., 15°, 30°, and 45°) are dominated by collapse-type failures, indicating anisotropic behavior in an otherwise isotropic design. Smaller cell sizes have more strength at lower orientations due to their higher relative density, but larger cells perform better at higher orientations.
Rancang Bangun Mesin Pengaduk Multifungsi guna Meningkatkan Potensi dan Membantu UMKM dengan Kebutuhan Pencampuran Bahan yang Terdapat di Kota Blitar, Jawa Timur Alhadi, Kafi Hannan; Hendrowati, Wiwiek; Guntur, Harus Laksana; Solichin, Moch.; Yuniarto, Muhammad Nur; Sutantra, I Nyoman; Wikarta, Alief; Pramono, Agus Sigit; Sutikno, Sutikno; Syaifudin, Achmad; Harto, Budi
Sewagati Vol 9 No 4 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i4.2495

Abstract

Salah satu kendala utama yang dihadapi oleh UMKM adalah keterbatasan teknologi dan peralatan yang memadai. Banyak pengusaha kecil masih menggunakan cara manual dalam proses produksi, yang tentunya akan memakan waktu lama dan tenaga lebih besar. Selain itu, kualitas produk yang dihasilkan sering kali tidak konsisten, karena bergantung pada keterampilan pekerja dan alat-alat sederhana. Hal ini mengakibatkan terhambatnya kemampuan UMKM untuk meningkatkan skala produksi dan bersaing dengan perusahaan yang lebih besar. UMKM yang menjadi sasaran dalam rancangan kegiatan abmas ini adalah UMKM yang melibatkan proses pencampuran bahan dalam menjalankan usahanya. Contoh UMKM yang menjadi sasaran utama dalam abmas ini adalah UMKM yang bergerak pada bidang konstruksi level menengah ke bawah yang memerlukan bantuan alat pengaduk cat, UMKM yang memproduksi sabun cair, UMKM yang memproduksi lem perekat, hingga UMKM yang memproduksi makanan seperti kerupuk puli bawang, roti, donat yang notabene memerlukan proses pencampuran bahan. Pada Abmas dan KKN ini tim telah berhasil merancang 3 alat mixer untuk pencampuran bahan dan mendistribusikan kepada UMKM yang membutuhkan melalui kerja sama dengan Dinas Koperasi, UKM, dan Tenaga Kerja Kota Blitar.
Co-Authors Achmad Syaifudin Achmad Syaifudin Agung Prijo Budijono Alfiana N Hidayati Alhadi, Kafi Hannan Alief Wikarta Ari Surya Yulianto Arif Wahjudi Arifin, Ahmad Anas Bambang Pramujati Bici, Michele Budi Harto Deta Rachmat Andika Dinny Harnany Effendi, M Khoirul Erryawan Kusuma Gilas Kurnia Taufik Hanif Pribadi Harnany, Dinny Harus Laksana Guntur I Made Londen Batan I Nyoman Sutantra Indra Sidarta Jean Mario Valentino, Jean Mario Julendra Bambang Ariatedja Mohammad Khoirul Effendi Mohammad Khoirul Effendi Muhammad Khoirul Effendi Oegik Soegihardjo Pandu Pratama Perkasa, Mustasyar Prasetyo Putra Wibowo Pratiwi, Fungky Dyan Rifki Wardana Sampurno Sampurno Sasaki, Katsuhiko Shalahuddin, Lukman Solichin, Moch. Suhardjono Suhardjono Suhardjono Suhardjono Sultoni, Arif Indro Susila Candra Sutantra, I.N. Sutikno Sutikno Sutikno Sutikno Unggul Wasiwitono Wiwiek Hendrowati Yohanes Yuniarto, Muhammad Nur Yusuf Kaelani