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Anita Susilawati
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Teknik Mesin, Fakultas Teknik, Universitas Riau Kampus Bina Widya, Jl. HR. Soebrantas Km. 12,5 Panam, Pekanbaru 28293, Riau, INDONESIA
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Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Published by Universitas Riau
ISSN : 23547065     EISSN : 25276085     DOI : http://dx.doi.org/10.36842/jomase
Core Subject : Science, Engineering,
Aerospace Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering
The mission of the JOMAse is to foster free and extremely rapid scientific communication across the world wide community. The JOMAse is an original and peer review article that advance the understanding of both science and engineering and its application to the solution of challenges and complex problems in naval architecture, offshore and subsea, machines and control system, aeronautics, satellite and aerospace. The JOMAse is particularly concerned with the demonstration of applied science and innovative engineering solutions to solve specific industrial problems. Articles preferably should focus on the following aspects: new methods or theory or philosophy innovative practices, critical survey or analysis of a subject or topic, new or latest research findings and critical review or evaluation of new discoveries. Scope The JOMAse welcomes manuscript submissions from academicians, scholars, and practitioners for possible publication from all over the world that meets the general criteria of significance and educational excellence. The scope of the journal is as follows: Naval Architecture and Offshore Engineering Computational fluid dynamic and Experimental Mechanics Hydrodynamic and Aerodynamics Noise and Vibration Aeronautics and Satellite Engineering Materials and Corrosion Fluids Mechanics Engineering Stress and Structural Modeling Manufacturing and Industrial Engineering Robotics and Control Heat Transfer and Thermal Power Plant Engineering Risk and Reliability Case studies and Critical reviews
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 329 Documents
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Design and Development of Quadcopter’s Frame Anuar, Kaspul; Susilawati, Anita; Syafri, Syafri; Fatra, Warman; Huda, Feblil; Nazaruddin, Nazaruddin; Cupu, Dedi Rosa Putra
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 1 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i1.360

Abstract

The purpose of this research is to obtain a design and prototype of quadcopter’s frame, which be developed further as a quadcopter that capable of carrying payload of 1.5 kg with flight time of more than 20 minutes. The design begins with estimating the values of Maximum Take-Off Weight (MTOW), required thrust, propeller dimensions, and wheelbase dimensions of the quadcopter. The results show the MTOW of the quadcopter was 5 kg, with each motor requiring of 2.5 kg of thrust per arm. The wheelbase dimension was 790 mm, and the propeller diameter of 17 inches. A wheelbase dimension was utilized to develop three conceptual frame designs for the quadcopter. The three conceptual designs were selected using a decision matrix table. The selected design was calculated for its structural strength by applying a load of 2.5 kg on each motor mounting. The results show the maximum stress value of 21.17 MPa, the maximum deflection of 3.5 mm, and safety factor of 22.44. Then, the prototype of quadcopter’s frame was manufactured. Therefore, the producing of prototype was measured the mass and deflection. Based on the measurements conducted, the quadcopter frame has an actual mass of 595 grams and a maximum deflection of 3.7 mm. The actual deflection value and the actual mass are close to the deflection and mass obtained from the calculation.
A Systematic Review of Optimal Power Flow Studies with Renewable Energy Sources Penetration Maulana, Ricky; Syafii, Syafii
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 1 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i1.357

Abstract

The increasing penetration Renewable Energy Source (RES) in electrical power grid, the power system must minimize costs and comply with operational and safety requirements. Optimal power flow (OPF) contributes to this objective by determining the optimal control settings, satisfying system and safety constraints, and enhancing operational efficiency. A systematic review was conducted to assess how OPF studies have been evaluated in the literature. The review analyzed 64 journal articles to identify specific OPF studies from three perspectives: type of RES penetration, objective function, and method of OPF. The results indicate that (a) wind turbines are the most commonly used RES model in OPF studies, (b) cost function is the primary objective that the majority of research has considered, and (c) novel meta-heuristics have often been used in OPF methods under uncertain RES penetration. This systematic review identifies research gaps and topics for further research to study OPF with RES penetration. The findings are expected to benefit researchers in deciding the best OPF method under uncertain RES.
Design of Air Blast Freezing System Using Cascade Refrigeration R290/R32 System with Capacity 5kg Martin, Awaludin; Nasution, Fikri Fahlevi; Mainil, Rahmat Iman
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 1 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i1.359

Abstract

Indonesia is a maritime country that has an abundance of marine catches. In 2022, the production of marine catches reached 24.85 millions tons, while the export amount was 1.221 millions tons. This is due to the limited technology that can extend the freshness of marine catches. Based on this problem, a cooling system was designed in the form of an ABF that can freeze marine catch products. The Air Blast Freezing (ABF) system is designed at an air temperature of -40oC using a cascade refrigeration system. The working fluid used is R290/R32 hydrocarbon, which has very low GWP and ODP so it is safe for the environment and the earth's ozone layer. The results obtained show that the cooling load is 444.037 Watts, the LTC compressor power and HTC compressor power are 116.19 Watts and 205.98 watts. The designed air blast freezing system has a surface area of LTC evaporator of 2.670 m2 and HTC condenser of 4.780 m2. The calculated capillary pipe length is 1.94 m for HTC and 1.51 m for LTC, the COP of the ABF system is 2.774.
Percentage Area Reduction of Uncut Fibre of Drilling Pineapple Leaf Fibres Reinforced Composites with Peck Drilling Canned Cycle Method Mulyadi, Ismet Hari; Rusdi, M.F.R.; Kurniawati, Loli; Ma'sum, Arif
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 1 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i1.361

Abstract

The effectiveness of utilizing the peck drilling canned cycle to minimize hole delamination has been demonstrated. However, its potential to reduce uncut fiber resulting from fiber fracture and pull-out has not been fully recognized, particularly in drilling natural fiber-reinforced polymer composites. Therefore, this study investigated the performance of this established method and compared it with the conventional drilling approach using a stepped geometry drill bit, which is purported to minimize hole delamination and, consequently, reduce uncut fiber. A series of hole-making processes were carried out according to a Completely Randomized Design (CRD) experimental plan. Different feed movements were employed to elicit responses, specifically the extent of uncut fiber area. The findings indicate that employing the established method could reduce uncut fibers by approximately 18.6%, representing a 2% enhancement compared to the alternative approach. Hence, the peck drilling canned cycle strategy offers a promising and cost-effective alternative to using specialized drill bits or high-performance cutting tools.
Investigation of the Effect of CFRP and GFRP Sheet Length on the Final Capacity of Reinforced Concrete Beams of Buildings in Coastal Areas Mashhadi, Ali Rasoulian; Varastehpour, Hamid; Ghassemizadeh, Seyed Mahmood
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 1 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i1.352

Abstract

In the last two decades, the use of FRP (Fiber Reinforced Polymer) composites for flexural, shear, torsion, and enclosing reinforcement of various structural components has grown exponentially. In this paper, the effect of using FRP composite with carbon fibers and glass with different lengths on the behavior of reinforced concrete beams is investigated. Eight reinforced concrete beams with a length of 150 cm, a width of 15 cm, and a height of 20 centimeters were modeled by composite fibers with lengths of 80 cm, 100 cm, 120 cm and 140 centimeters. Then, the sample reinforced concrete beam was modeled in ABAQUS® , which the results were compared with the laboratory samples. It were observed that with increasing the length of FRP sheets, the strength of reinforced concrete beams compared to the sample concrete beam, increased by about 61%, 82%, 86%, and 87%, respectively. It was due to the high cost of FRP sheets and compressive strength required in these sheets that used optimally. Therefore, the length of FRP strengthening sheets can be optimized to reduce the cost of FRP sheets and use them efficiently.
Automatic Control of Bottle Contents and Separation of Empty Bottles in Packaging Process Using Programmable Logic Controller Siemens S7-1200 Imnadir, Imnadir; Junaidi, Abdul Khair; Arief, Dodi Sofyan; Dalil, M
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 2 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i2.368

Abstract

Filling liquid into bottles with the same volume is an important part of product packaging. All packaged bottles must be filled per a product's provisions. A device is needed to control the contents of the bottles from a certain distance or from outside the bottles by moving on the conveyor track. So that the bottles can be automatically filling the same volume continues to the packaging process. To be able to control the contents of the bottle automatically and properly may need a tool and a control program. This research was carried out to be able to control the contents of transparent bottles, using a Siemens S7-1200 PLC, so that a system for controlling bottle contents quickly and precisely, which helps the production process run smoothly. The main components used in this research were the Siemens S7-1200 Programmable Logic Controller, Omron E3S-DB sensor, and pneumatic cylinder. The result showed the Control Module Program 1 successfully detected empty bottles and rejected them properly. Control module program 2 successfully moves the pneumatic cylinder to move the cylinder continuously until the stop button was pressed. The module 3 programs succeeded in moving the cylinder, which was limited to only 10 repeated movements until it stopped.
Development of Rice Threshing Machine Based Quality Function Deployment Approach – A Case Study Susilawati, Anita; Roni, Guido; Yohanes, Yohanes; Anuar, Kaspul; Fatiya, Fatiya
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 2 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i2.373

Abstract

Threshing rice is an important stage in agriculture, especially in rice production. The aim of this paper is to develop designs for multi-functional rice threshing machines using the Quality Function Deployment (QFD) approach. The case study was conducted on farmers in a village in Indonesia. Based on observations and survey results conducted with farmers, there was a problem with the rice threshing machine being used less than optimally, so that the time and cost of harvesting became greater. The research was carried out by collecting data by distributing questionnaires directly to 15 respondents. In this research, validity and reliability testing was carried out. The result was in the form of design development, the weight of the rice threshing machine was obtained at 35 kg, which was lighter than previously machine used by farmers. More, the development for new one was resistant to rust and has a fan that functions to separate the rice grains from the grain. Priority of technical characteristics based on weight and dual function of the tool. The dual function of the tool was to thresh and separate the rice with sides and empty ones. Furthermore, the development of rice threshing machine can tailored to the consumers needs.
Integrated IoT-Based Fire Prevention and Evacuation System for High-Rise Buildings Maharmi, Benriwati; Samsudin, Samsudin; Ramdha, Triana; Hanifulkhair, Hanifulkhair
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 3 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i3.383

Abstract

Conventional fire protection systems, characterized by low installation costs, often lack the sophistication to provide optimal protection, especially in high-rise buildings. This study aims to refine the operational productivity concerning fire prevention and evacuation by embracing a detailed fire safety framework that leverages Internet of Things (IoT) capabilities. This prototype integrates SMS and phone call alerts to facilitate timely response in case of fire detection. The system utilizes three key sensors: a KY-026 flame sensor module, an MQ-2 gas and gas sensor, and an LM35 temperature sensor. Testing results indicate significant sensor value variations between normal and fire conditions. The KY-026 flame sensor module, for instance, exhibited an average reading of 137.3 under normal conditions and 895.2 during fire detection. Similarly, the MQ-2 sensor recorded 1234.7 ppm and 4237.8 ppm, respectively. The LM35 temperature sensor measured 28.34°C and 48.46°C under normal and high-temperature conditions. Despite the sensors showcasing commendable efficacy, they displayed a minor error margin fluctuating between 0.04% and 1.08%.
Study of the Secondary Flow Formed on Two-Channel Junction Using Computational Fluid Dynamics Pratiwi, Tasya Mahardika; Putra, Yoga Satria; Sampurno, Joko; Muhardi, Muhardi; Sutanto, Yuris
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 3 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i3.372

Abstract

Information about the secondary flow formed at the junction is crucial for identifying areas vulnerable to erosion. This study aims to build a water flow simulation at a two-channel junction with varying angles using Computational Fluid Dynamics (CFD). The goal of the simulation is to analyze the velocity changes on each variation of angles (90°, 70°, 50°, 30°, and 10°) on the two-channel junction. The validation of these flow patterns is significantly connected to the reference data. The secondary flow is formed as the impact of the velocity changes, and the main channel flow meets the branch channel flow. The flow patterns at the 90° junction exhibit similar formation, as evidenced by secondary zones formed around the junction, such as the contraction and separation zones. The contraction zone forms in areas near junctions with high-velocity values, while the separation zone develops in areas where velocity decreases due to the impact of two flows. This study found that CFD effectively analyses velocity changes on two-channel junctions.
Sound Signal Potential for Visualization of Corrosion in Pipelines Syuhada, Ryan; Huda, Feblil; Nazaruddin, Nazaruddin
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 3 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i3.376

Abstract

This study explores the potential of using sound signals to visualize corrosion within pipes. Early detection of pipe damage is crucial in preventing leaks and larger losses, especially in industries that rely on pipes for fluid distribution. Sound-based methods have advantages in detecting damage in hard-to-reach areas without direct contact with the pipe's surface. This study demonstrates that microphones mounted on the pipe surface can capture variations in sound signal characteristics related to corrosion conditions. To simulate corrosion in pipes, a layer of plasticine was applied to a specific area of the pipe's inner surface, creating a model of corrosion damage. The test results show that microphone positions aligned with the corroded area produce higher signal coefficients compared to non-corroded areas. With further processing, these signal data have the potential to be visualized as 3D images, providing a more detailed representation of the internal conditions of the pipe.

Page 15 of 33 | Total Record : 329

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