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All Journal International Journal of Electrical and Computer Engineering Mechatronics, Electrical Power, and Vehicular Technology Jurnal Keteknikan Pertanian Indonesian Journal of Science and Technology Mesin Jurnal Ilmu Sosial Politik dan Humaniora (Jisora) EPI International Journal of Engineering Indonesian Journal of Computing, Engineering, and Design Automotive Experiences
Bentang Arief Budiman
Institut Teknologi Bandung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Electric Delta Trike Stability Characteristic and Maneuverability Analysis: Experiment and Multi-Body Dynamic Simulation Ignatius Pulung Nurprasetio; Robby Dwianto Widyantara; Bentang Arief Budiman; Rakshidatu Lestaluhu; Djati Wibowo Djamari; Farid Triawan; Muhammad Aziz
Automotive Experiences Vol 5 No 3 (2022)
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.7070

Abstract

This paper reveals the stability characteristics of an electric-powered delta trike (e-trike), which is developed for goods delivery services. The changeable center of gravity position and weight due to electric component placement and the carried good weight can cause instability of the e-trike. Three main parameters are firstly evaluated on the e-trike: 1) geometry, 2) center of gravity, and 3) stiffness and damping coefficient of the suspensions. Single Lane-Change (SLC) and Double Lane-Change (DLC) tests were then conducted following ISO 14791:2000 and ISO 3888-1:2018 standards, respectively. An e-trike model was created and simulated using SIMPACK, a multi-body dynamic software. The simulation results showed that the developed e-trike model can replicate SLC and DLC tests, indicating the model was valid. A parametric study with the validated model was then conducted with various e-trike weights, center of gravity position, and suspension stiffness and damping ratio values. The results showed additional weight and higher center of gravity position can decrease threshold velocity to avoid rollover. The low suspension stiffness also contributed to lower the threshold velocity. However, the damping coefficient value did not change the threshold velocity significantly. These results can be a guideline in designing a delta trike with better performance in stability and maneuverability.
High Precision Fertilizer Applicator For Industrial Plantation: Discrete Element Method Simulation And Prototyping Ignatius Pulung Nurprasetio; Adit Febriansyah; Robby Dwianto Widyantara; Bentang Arief Budiman
Jurnal Keteknikan Pertanian Vol. 10 No. 2 (2022): Agustus 2022
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.010.2.98-107

Abstract

We designed a high-precision fertilizer applicator to distribute fertilizer with the required dose at every specified point. The dose necessary aims to meet the nutritional needs of plants, so that plant growth is more effective while reduce waste. The fertilizer applicator was designed to have an auger and drive system that can discharge the fertilizer precisely. A 3D CAD model of the applicator was created to conduct a discrete element simulation to predict the discharge fertilizer process. Experiment was carried out to validate the simulation model. The experiment utilized a small-scale applicator prototype manufactured by 3D printing. A small electric actuator controlled by Arduino microcontroller was installed to rotate the auger. The auger can push and release the fertilizer precisely depending on the rotation's number. Both simulation and experiment results were compared and showed a small error of 6.42%. The results show our designed fertilizer applicator have good accuracy and precision, which indicates the applicator was suitable to distribute fertilizer uniformly.
Failure Investigation of Plastic Shredding Machine’s Flange Coupling Based on Mechanical Analysis Ignatius Pulung Nurprasetio; Bentang Arief Budiman; Farid Triawan
Indonesian Journal of Science and Technology Vol 2, No 2 (2017): IJoST: VOLUME 2, ISSUE 2, September 2017
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v2i2.7988

Abstract

This paper presented the investigation of failure mechanism of plastic shredding machine’s flange coupling which is made of cast steel. The machine unexpectedly stalled a few minutes after High-Density Polyethylene (HDPE) plastic bottles were fed into the machine. It was discovered afterward that the flange broke with the large crack surface. Finite element analysis (FEA) was performed to find the position and value of the critical stresses in the flange during operating condition. Subsequently, hardness test was conducted on the flange body to determine the Brinell hardness which was then converted into the approximate ultimate tensile strength (σu). As a result, a maximum Von Mises stress of 287 MPa was confirmed from the FEA to be concentrated in the flange’s keyway. Although this was found to be lower than the approximate σu obtained from hardness testing i.e. 449 MPa, the critical stress indicated an unstable condition which may induce a crack initiation any time when vibration or dynamic load occurs. Based on these analyses, it was concluded that the failure had been initiated by dynamic rather than static loading generated during machine stall condition. The dynamic load caused crack initiation at a stress concentration point of the keyway. The crack then propagated rapidly, breaking the flange body.
Numerical and Experimental Analyses of Track Shoe Patterns for Vehicle on Sandy Terrain Ignatius Pulung Nurprasetio; Wirya Wicaksana; Siti Zulaikah; Bentang Arief Budiman
EPI International Journal of Engineering Vol 5 No 1 (2022): Volume 5 Number 1, February 2022
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022022.02

Abstract

A track is a vehicle propulsion system that consists of a continuous band of chains connected with track shoes or may be entirely made of rubber. The track system is still commonly used on various vehicles, including bulldozers, excavators, tanks, and tractors, and has recently been used in lunar expedition vehicles. A tracked vehicle is mainly designed to provide better mobility in rough, uneven, or slippery terrain. The main component of the track system is track shoes or so-called grousers. This track shoe geometry will determine the tractive performance of the vehicle. If an incorrect shape is used, the excavator will most likely slip. The previous study approached this traction problem by using the semi-empirical method. However, until now, the track geometry and traction relation are still unclear. This research focuses on the effects of track shoe geometry on tractive performance and vehicle climbing ability. The analysis was mainly conducted with a DEM (Discrete Element Method) simulation. The result from the experimental test is also confirmed using a small-scale RC prototype on simulated terrain with different slope variations. It is proven that the grouser height directly affects the climbing performance of tracked vehicles. A higher grouser height proves to be better at a higher inclination slope. However, for a low inclination angle, the flattened track was better. The traction result from the EDEM simulation also yields a similar result. However, higher usable traction means more friction is generated; therefore, the track with higher traction also takes more energy to cover the same distance.
Investigation of Compressive Behavior of Pre-folded Thin-walled Column Fabricated by 3D Printing Farid Triawan; Elin Rachmawati; Bentang Arief Budiman; Djati Wibowo Djamari; Andy Saputro; Ilman Arpi
Indonesian Journal of Science and Technology Vol 6, No 3 (2021): IJOST: VOLUME 6, ISSUE 3, December 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v6i3.39138

Abstract

This paper reveals the mechanical behavior of thin-walled columns with pre-folded patterns subjected to compressive loading. The column specimens (Polylactic Acid) are fabricated using Fused Deposition Modeling 3D printer and subjected to quasi-static compressive loading to investigate their mechanical behavior (by modifying the specimens' cross-section patterns and folding angles). The column specimens are simulated by finite element analysis to understand how the stress distribution and local deformation affecting the stiffness, strength, and overall deformation. The experiments showed that introducing the pre-folded pattern in a thin-walled column with different cross-sections can dramatically lower its structural stiffness (85%) and compressive strength (69%), but increase its deformability (115%), which is good agreement with numerical simulation. The variation of cross-section patterns and pre-folding angle could effectively modify the compressive mechanical behavior. Moreover, the results demonstrate how the FDM 3D Printing method can be used in fabricating a thin-walled column with irregular shapes and then to modify its deformability. This finding can be useful for designing any complex structures requiring specific stiffness and deformation such as suspension devices, prosthetic devices in biomechanics, and robotic structures.
Bacterial Cell Inactivation Using a Single-Frequency Batch-Type Ultrasound Device Poetro Sambegoro; Maya Fitriyanti; Bentang Arief Budiman; Kamarisima Kamarisima; Sekar Wangi Arraudah Baliwangi; Calvin Alverian; Saeed Bagherzadeh; Ganesan Narsimhan; Pingkan Aditiawati; Ignatius Pulung Nurprasetio
Indonesian Journal of Science and Technology Vol 6, No 1 (2021): IJOST: VOLUME 6, ISSUE 1, April 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v6i1.31516

Abstract

Ultrasound technology employs cavitation to generate high-pressure soundwaves to disrupt bacterial cells. This study reveals the effectiveness of a single frequency ultrasound device for bacterial cell inactivation. A low-cost ultrasound device having a single frequency, i.e. 22 kHz for lab-scale application, was developed first, and the prototype was mechanically designed and analyzed using the finite-element method to assure the targeted natural frequency could be achieved. The prototype was then tested inactivating bacterial cells, Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis), in a simple medium and a food system, and the results were then compared to a commercial system. A treatment time of up to 15 minutes was able to reduce E. coli and B. subtilis cells by 3.3 log and 2.8 log, respectively, and these results were similar to those of the commercial system. The effectiveness of bacterial cell inactivation using the developed single-frequency ultrasound device is then discussed. The findings are useful for designing low-cost ultrasound devices for application in the food industry.
Development Of Appropriate Technology Adoption For Coffee Farmers In Sukawangi Village, Sumedang Bentang Arief Budiman; Hari Purnama; Husna Nugrahapraja; Muhammad Abdur Rasyid; Natas Setiabudhi Daryono Putra; Sri Aswin Suryani; Annisa Ratna Nurillah; Ima Mulyama Zainuddin; Rindia Maharani Putri; Wervyan Shalannanda; Raden Aswin Rahadi
Jurnal Ilmu Sosial Politik dan Humaniora (JISORA) Vol 2 No 2 (2019): Jurnal Ilmu Sosial Politik dan Humaniora
Publisher : Fakultas Ilmu Sosial dan Ilmu Politik - Universitas Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (853.354 KB) | DOI: 10.36624/jisora.v2i2.22

Abstract

In this paper, the authors propose solutions to increase the added value of coffee in the form of the process of making the process of making coffee using appropriate technology adoption. This paper uses qualitative methods of locational survey and literature study. Survey activities are conducted in the form of interviews and observations. The team conducted interviews with coffee farming communities in the area and observed the conditions of coffee farming. The literature study was conducted by synthesizing literature reviews and continued by formulating the theory and principles of appropriate technology in the context of local agriculture in Sukawangi Village, Sumedang Regency, West Java. In this paper, the authors describe the solution proposals related to the problems of coffee farmers in Sukawangi, Sumedang. Two suggestions for increasing the value added of coffee beans are by using appropriate technology adoption. With both of these solutions, it is expected that the quality of coffee plantation in Sumedang can be increased and can be marketed in both domestic and international markets. As a result, the welfare of farmers in Sumedang will increase.
Failure assessment in lithium-ion battery packs in electric vehicles using the failure modes and effects analysis (FMEA) approach Rizky Cahya Kirana; Nicco Avinta Purwanto; Nadana Ayzah Azis; Endra Joelianto; Sigit Puji Santosa; Bentang Arief Budiman; Le Hoa Nguyen; Arjon Turnip
Journal of Mechatronics, Electrical Power, and Vehicular Technology Vol 14, No 1 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.mev.2023.v14.94-104

Abstract

The use of batteries in electric cars comes with inherent risks. As the crucial component of these vehicles, batteries must possess a highly dependable safety system to ensure the safety of users. To establish such a reliable safety system, a comprehensive analysis of potential battery failures is carried out. This research examines various failure modes and their effects, investigates the causes behind them, and quantifies the associated risks. The failure modes and effect analysis (FMEA) method is employed to classify these failures based on priority numbers. By studying 28 accident reports involving electric vehicles, data is collected to identify potential failure modes and evaluate their risks. The results obtained from the FMEA assessment are used to propose safety measures, considering the importance of the potential failure modes as indicated by their risk priority number (RPN). The design incorporates safeguards against mechanical stress, external short circuits, and thermal runaway incidents. The findings of this study enhance our understanding of electric vehicle (EV) battery safety and offer valuable insights to EV manufacturers, regulators, and policymakers, aiding them in the development of safer and more reliable electric vehicles.
Co-Authors Abdulkareem Sh. Mahdi Al-Obaidi Adit Febriansyah Andy Saputro Annisa Ratna Nurillah Arjon Turnip Asep Bayu Dani Nandiyanto Calvin Alverian Djati Wibowo Djamari Djati Wibowo Djamari Elin Rachmawati Endra Joelianto Firman Bagja Juangsa Firmansyah, Ridha Fitri Endrasari Fitriyanti, Maya Gabriela Chelvina Santiuly Girsang Ganesan Narsimhan Hari Purnama Husna Nugrahapraja Ignatius Pulung Nurprasetio Ignatius Pulung Nurprasetio Ignatius Pulung Nurprasetio Ignatius Pulung Nurprasetio Ignatius Pulung Nurprasetio Ignatius Pulung Nurprasetio Ilhamsyah, Rizky Ilman Arpi Ilyasa Dwi Putra Ima Mulyama Zainuddin Kamarisima Kamarisima Kelvin Noersalim Le Hoa Nguyen Muhamad Rausyan Fikri Muhammad Abdur Rasyid Muhammad Aziz Muhammad Aziz Nadana Ayzah Azis Natas Setiabudhi Daryono Putra Natas Setiabudhi Daryono Putra Naufal, Rifqi Syuja Nicco Avinta Purwanto Noersalim, Kelvin Nurprasetio, Ignatius Pulung Nurprasetio, Ignatius Pulung Pandji Prawisudha Pingkan Aditiawati Poetro Sambegoro Prawisudha, Pandji Raden Aswin Rahadi Rahardian, Samuel Rahardian, Samuel Rakshidatu Lestaluhu Rifqi Syuja Naufal Rindia Maharani Putri Rizky Cahya Kirana Robby Dwianto Widyantara Robby Dwianto Widyantara Saeed Bagherzadeh Sambegoro, Poetro Lebdo Samuel Rahardian Samuel Rahardian Santosa, Sigit Puji Sekar Wangi Arraudah Baliwangi Silmi Ridwan Putri Siti Nur Hofifah Siti Zulaikah Sri Aswin Suryani Triawan, Farid Wervyan Shalannanda Wirya Wicaksana