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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Indonesian Journal Of Environmental Science and Technology INSIST (International Series on Interdisciplinary Research) Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Adhy Prayitno, Adhy
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Aerospace Engineering Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Other

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Journal : Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)

 1 
Comparison of Commercial and Palm Slag Motorcycle Brake Pads Performance Badri, Muftil; Arief, Dodi Sofyan; Prayitno, Adhy
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 38 No 1 (2016): 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.v38i1.393

Abstract

This paper presents a number of experimental data and techniques used in performance of commercial and palm slag motorcycle brake pads. The experiments include wear and hardness tests. The wear behavior of motorcycle brake pad that was observed in the study on sliding contact member brake discs results in the conversion of kinetic energy into heat at the pad and disc interface leads to this investigation. The effects of speed of disc brake rotor are presented. Experimental results of the respective tests are presented on two motorcycle brake pads, namely commercial brake pad (CBP) and palm slag brake pad (PBP). It was found that the wear behavior of palm slag brake pad is influenced by design of geometry shape of motorcycle brake pad. The wear behavior of CBP and PBP composite depend on wet and dry condition. It is clearly seen that wear behavior of PBP composite increase significantly with dry condition. Wear behavior increase significantly with the increase of rotor speed. With increasing speed of rotor disc, the hardness of PBP composite changes from low hardness to a more stable hardness behavior.
Warning System and Automatic Engine Cut off Control Deveploment for Heavy Machine; A Case Study on KOMATSU PC130F-7 Prayitno, Adhy; Masykuri, Imron
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 63 No 2 (2019): 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 | Full PDF (510.395 KB) | DOI: 10.36842/jomase.v63i2.157

Abstract

An alert and automatic engine cut-off system is an integrated device to prevent the machine from experiencing sudden damage while operating. This system works using feedback principles controller as one component of the regulatory system that functions to process the feedback signal and the reference input signal or error signal becomes a control signal. The purpose of this study is to design a preventive system as a form of controller development for the heavy machine. As a case study, the system is employed on Komatsu PC130F-7 Excavator for engine cut-off functions if there are errors or abnormal engine oil levels and pressures. Komatsu PC130F-7 Excavator is heavy equipment with the highest population in the area of plantations and industrial plantations, especially in Riau and surrounding areas. The controller created is the development of an existing controller on the Machine by adding the engine cut-off feature if there are abnormal oil levels and pressures, and also as an alternative solution to the current problems, that is for safety and preventing more serious damage to the engine. The oil level sensor will be active if the oil level is below the low on the H-L (high-low) measuring stick, and the oil pressure sensor will read if the oil pressure is below 0.49 kPa (0.5 kg / cm²). This design has two inputs, that is a voltage of ± 15 volts on the path of the engine oil level sensor and oil pressure sensor. This voltage is used as an input that activates the relay work to respond to lower engine speed from 1880 rpm to 950 rpm and continued by the timer work as a time lag regulator to cut off the electricity on the starting engine line so that the engine will automatically stop turning and shut down.
Imaging and Programming Based Computation of Logistic Package Volumes Application on Automatic Mail Machines Prayitno, Adhy; Shiddiq, Minarni; Arief, Dodi Sofyan; Mirdanies, Midriem; Ayunita, Dyna
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 62 No 1 (2018): 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 | Full PDF (511.287 KB) | DOI: 10.36842/jomase.v62i1.150

Abstract

At present the determination of weight and volume has been widely used to assist in the process of determining costs for freight forwarding services. Shipping costs are determined by the weight of the goods, but the weight of the goods consists of two types, namely actual weight and volume weight. The weight of the weighing will be used directly if the item or box is small, but if the item is large but the weight is real then the weight of the volume will be used. Algorithms that combine triangulation and 2D measurement techniques can be used to build 3D surfaces so they can measure the volume of a product. Determination of volume in the optical scoring system can be done using the laser triangulation method and the area of 2D image measurement, then using a computer algorithm to get the results of 3D images to determine the volume of the object. The calculation process used in this study uses MATLAB software. MATLAB is the most efficient software for matrix-based numerical calculations and is widely used in mathematical calculations, development and algorithms, programming modeling, prototyping and simulation, data analysis, exploration and visualization, numerical and statistical analysis, and technical application development. The results of the study using MATLAB include students becoming more interested in learning and more independent in learning mathematics, can visualize data graphically to help analyze the data analyzed, and help in modeling the characteristics of variations in fuel mixtures which include density, viscosity, dynamic and kinematic viscosity.
Co-Authors Ayunita, Dyna Dodi Sofyan Arief, Dodi Sofyan G, Yogie Rinaldy Mafiqi, Arif Masykuri, Imron Midriem Mirdanies Minarni Shiddiq, Minarni Muftil Badri Muhammad Irvan Nurharsanto, Sigit Saputra, Rachman Shodikin, Shodikin Yantoa, Wahyu Fajar