Article Per Year (5 Year)
p-Index From 2021 - 2026
2.165
P-Index
This Author published in this journals
All Journal Jurnal Teknik Elektro Jurnal Momentum Jurnal Teknik Mesin Jurnal Teknik Mesin
Asmara Yanto
Institut Teknologi Padang
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 49 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 49 Documents
Search

 1   2   3   4   5 
Study of Experimental Vibration Due to Misalignment of Pulley-Belt in Rotary Machine Asmara Yanto; Anrinal; Rozi Saferi; Zultri Memori
Jurnal Teknik Mesin Vol 10 No 2 (2020): Jurnal Teknik Mesin Vol.10 No.2 October 2020
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2020.v10.i2.118-122

Abstract

This study aims to investigate the vibration of rotary machine due to misalignment of its pulley-belt, experimentally. Here, the rotary machine is driven by an AC motor with pulley-belt transmission that positioned on the outer portion of shaft-rotor. To generate vibration of rotary machine, pulley-belt is conditioned to have a combination of offset and angular misalignments. Offset misalignment variations are 0, 2, 4, and 6 mm and angular misalignment variations are 0ᵒ, 2ᵒ, 4ᵒ, and 6ᵒ. Vibration of rotary machine is measured on the bearing housing by use MEMS-based accelerometers. The measured signal of vibration acceleration is acquired with a data acquisition device to obtain vibration spectrum. From the investigation to vibration spectrum has been done, it can be concluded that vibration of rotary machine has characteristic with dominant frequencies at 1xRPM of shaft and at 1xRPM of motor. The vibration amplitude at 1xRPM of shaft is higher than the vibration amplitude at 1xRPM of motor. From this investigation, it is not possible to find differences in the characteristics of vibrations significantly that occur between vibrations due to offset misalignment, angular misalignment or their combination.
Design, Fabrication and Analysis of Material Requirements of Spices Mixing Machine Rozi Saferi; Asmara Yanto; Jendri Surianda
Jurnal Teknik Mesin Vol 10 No 2 (2020): Jurnal Teknik Mesin Vol.10 No.2 October 2020
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2020.v10.i2.123-130

Abstract

The process of mixing the spices often done manually, which it takes time and reduces the effectiveness of the process. This study aims to analyze the design, material requirements and production process of a spices mixer machine. In this work is also done to analyze the speed optimization in mixing process of spices with the main food. Analysis of the machine design using the finite element method by aided Autodesk Inventor software. The analysis results show that the mass density of the frame is 8.8041 g/cm3, and the maximum compressive strength is 345 MPa. Furthermore, the young’s modulus is 200 GPa, the position ratio is 0.3 and the shear modulus is 76.9231 GPa. The test of spices mixer machine showed that the optimal spice stirring value occurred at 35 rpm with a mixing percentage of 83%.
Development of Dynamic Signal Analyzer Virtual Instrument (DSA VI): A Research Proposal Asmara Yanto; Anrinal
Jurnal Teknik Mesin Vol 6 No 1 (2016): Jurnal Teknik Mesin Vol.6 No.1 April 2016
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2016.v6.i1.50-54

Abstract

At present, one of the maintenance types that is being developed is the predictive maintenance based on the mechanical signals obtained by performing the mechanical quantities measurements. In general, a mechanical signal is a dynamic signal where to acquire this signal, it is required a dynamic signal analyzer (DSA) instrument. However, the availability of DSA instruments in the market is limited in functionality and specification and also high cost. Therefore, in this work, a DSA instrument in the form of computer-based virtual instrument (DSA VI) would be developed. The DSA VI would designed by using the LabVIEW software and an Arduino UNO hardware. It is hopefully that the developed DSA VI capables to acquiring, processing, displaying, storing and reading the measured mechanical signals.
A Simple Dynamic Signal Analyzer Virtual Instrument to Monitoring and Control Airflow Temperature Asmara Yanto; Anrinal; Ryan Adi Pratama
Jurnal Teknik Mesin Vol 6 No 2 (2016): Jurnal Teknik Mesin Vol.6 No.2 October 2016
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2016.v6.i2.80-86

Abstract

This work aims to present a Dynamic Signal Analyzer Virtual Instrument (DSA-VI) for monitoring and control the airflow temperature in a prototype of air duct. Here, the DSA-VI has developed by using LabVIEW software and Arduino UNO. To investigate the performance of DSA-VI, an experiment has performed to monitoring and control airflow at settling temperature, 40oC, 50oC, and 60oC, respectively by using the DSA-VI. By assuming that an airflow temperature control system as the first order system, the time constant () should be inspected as one of the system characteristics. The testing at the settling and surrounding temperatures (Tsp and T0) are 40oC and 28.81oC respectively, obtained value of  is 7.49 s; at Tsp and T0 are 50oC and 29.88oC respectively, obtained value of  is 11.35 s; and at Tsp and T0 are 60oC and 28.81oC respectively, obtained value of  is 19.54 s. By using DSA-VI, the value of  at the transient response can be evaluated. At the steady state response, the airflow temperature has controlled well with the steady state error less than ± 2.5 %.
Modal Analysis of Free-Inverted Wilson Tennis Racket with 1st Type and 2nd Type of Damper Rozi Saferi; Asmara Yanto; Ismet Eka Putra
Jurnal Teknik Mesin Vol 6 No 2 (2016): Jurnal Teknik Mesin Vol.6 No.2 October 2016
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2016.v6.i2.99-103

Abstract

One way that can be used to analyze vibration in structures is the modal method of analysis. With this method vibration can be measured when the structure is working, so get the form of vibration mode and vibration values with different frequency levels. If the frequency of the structure in operation is known, then the structure can be controlled so that it does not work on its private frequency, so that the vibrations that occur in the structure are at a safe level. The objective of this research is to know the mechanism of reconstruction of disturbance force on tennis racket structure that vibrates and determines the personal frequency through the test. Then determine the time-frames style graph. In testing, the Wilson brand test racket was given a type 1 and type 2 damper with a weight of 320 grams and a 697mm long vertical hanging with a free-to-pedestal condition. After the software was run, an excitation style with impact hammer was applied to the top of the racket. Measurement of response is done by recording FRF (frequency domain) and coherence graph. The sampling results are stored in * .txt extensioned files and processed with microsoft excel to get real FRF and imaginary FRF graphics. The test is done several times by varying the accelerometer position of 8 points and 2 types of silencer. From the capital test the analysis of the specimen is hung freely with the silencer, then obtained the personal frequency of the test racket with a lower silencer than the personal frequency of the system without damper with a difference of 2 Hz. The three lowest vibration modes of the free-hanging system of the experimental results are the first mode of a half-wave graph forming a peak, the second mode being a one-wave graph forming a single valley peak, and the third mode being a one-and-a-half wave graph of the two valleys. The damping of the test structure is different at each test point and at any given frequency range.
Microstructures Changes in Aluminum 6061 Due To Oxidation before MMAW Welding Anrinal; Asmara Yanto; Rahmad Hidayat
Jurnal Teknik Mesin Vol 10 No 1 (2020): Jurnal Teknik Mesin Vol.10 No.1 April 2020
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2020.v10.i1.6-15

Abstract

This work aims to provide an overview of the changes in the microstructure of Aluminum 6061 because it was oxidized prior to MMAW welding. The research was conducted by first allowing aluminum 6061 to oxidize in the air (atmosphere) with a time variation of 0, 120, and 240 hours. The MMAW welding process uses a 1G welded seam without a 1G position, Grilumin 14 electrode, AWS A5.3-99 specifications, E4043 3.2 mm in diameter, with a DC current of 90 Amperes. The welding results show that the weld surface appears sooty and rough spots where the longer the oxidation occurs produces more soot and spots, while the results of the microstructure examination on the weld area and the HAZ area show that the micro structure of the weld area and the HAZ area experiences increased grain size.
Android-Based Control System of Lawn Mower Using Bluetooth Connection Asmara Yanto; Anrinal; Prasetyo Subekti
Jurnal Teknik Mesin Vol 10 No 1 (2020): Jurnal Teknik Mesin Vol.10 No.1 April 2020
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2020.v10.i1.33-40

Abstract

The purpose of this research is to build and test the android-based control system of lawn mower using bluetooth connection. The lawn mower has 4 DC motor actuators, where a DC motor for moving the rear wheels that serves to move the lawn mower back and forth, a DC motor to drive the front wheels that serves to turn the lawn mower, a DC motor to adjust the cutting blade elevation and a DC motor for turning the cutter blade. The four DC motors are controlled by Arduino. The command or input to control the motion of the mower is sent via android with bluetooth connection to arduino. The lawn mower control system testing is carried out to cut the grass. From the tests was conducted, it can be concluded that the lawn mower control system works well.
Experimental Study of Vibration of Shaft-Rotor System Due to Imbalance Asmara Yanto; Rozi Saferi
Jurnal Teknik Mesin Vol 7 No 2 (2017): Jurnal Teknik Mesin Vol.7 No.2 October 2017
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2017.v7.i2.88-94

Abstract

In this study, vibration of shaft-rotor system as a part of rotating machinery prototype due to imbalance has been monitored, processed and analyzed by a dynamic signal analyzer virtual instrument (DSA VI). The rotating machinery prototype consists of an AC induction motor, a pulley-belt system, and a shaft-rotor system supported by two bearings. Two discs were placed between two bearing housings. On both discs are added and placed additional mass as unbalance mass on shaft-rotor system. Unbalance mass placement is varied with different of angle orientations i.e. 0o, 30o, 60o, 90o, 120o, 150o and 180o between on both discs. DSA VI consists of four micro-electro-mechanical system (MEMS)-based accelerometers type ADXL335 that placed on the bearing housings, a data acquisition device and a data analyzer device. The four accelerometers serve to convert the mechanical quantities of measured vibration acceleration into electrical quantities in mV. Vibration signal in mV is acquired by the data acquisition device. Data sampling rate is set at control panel of the data analyzer device. Measurable vibrations in the time domain are displayed by the data analyzer device in a computer. Vibration in time domain is transformed into frequency domain by using fast fouriertransfrom (FFT) method. From this experimental study of vibration of shaft-rotor system due to imbalance obtained the highest vibration amplitude for unbalance mass placement with different of angle orientation is 30o between on both discs. If unbalance mass placement with different of angle orientation is greater than 30° between on both discs, then amplitude of vibration due to imbalance will decreases.
A Study on The Crack Behavior of Baggase-Polyester Composites Rozi Saferi; Asmara Yanto
Jurnal Teknik Mesin Vol 7 No 2 (2017): Jurnal Teknik Mesin Vol.7 No.2 October 2017
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2017.v7.i2.95-100

Abstract

The development of composite technology has begun to change nowadays, from composite fiber-synthesized to composite natural fiber fabrics. Natural baggase fiber has the opportunity to be developed as a strengthening medium in polymer resins. The purpose of this study were to know the effect of fiber orientation to maximum critical load for different initial crack lengths, to know elastic energy of composite material having fiber orientation varied at the time of loading and to know the effect of fiber orientation on fracture toughness for composite material. In this paper, it’s used 1.5mm diameter sugarcane fibers and the polyester matrix. The fraction volume of fiber and resin used is 5%: 95%. Fiber is given 20% NaOH treatment. Then the fiber is arranged with orientation 0/90º and 0/45º. While the bending test specimen is in accordance with ASTM-D5045 standard, the size of the specimen dimension is 125 mm long, 30 mm wide and 10 mm thick; with crack variations are 7mm, 9mm, 11mm, 13mm, and 15mm. It’s could be concluded that the critical load will decrease as the initial crack length increases. Composite material with 0/90º fiber orientation has elastic energy greater than composite with 45º fiber orientation. And crack propagation rate in composite material with fiber orientation 0/90º is faster than composite with 0/45º orientation.
Flexural Free Vibration of a Straight Vertical Cantilever Beam Asmara Yanto
Jurnal Teknik Mesin Vol 8 No 1 (2018): Jurnal Teknik Mesin Vol.8 No.1 April 2018
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2018.v8.i1.11-21

Abstract

In this paper, flexural free vibration of a straight vertical cantilever beam has been modeled and simulated. Here, a modeled-cantilever beam has modulus of elasticity, moment of inertia, cross-section and density are constant. Motion equation of a modeled-cantilever beam are separated become two Partial Differential Equations; one depends on position and another within time. This technique yields the motion equation of a modeled-cantilever beam contains two functions; one defines deflection shapes and another defines amplitude of vibration within time. The deflection shapes of a modeled-cantilever beam are described in first five natural frequencies. Furthermore, the motion equation of a modeled-cantilever beam is solved by using Fourier series. From simulation of a modeled-cantilever beam with 2 GPa modulus of elasticity, 2.67x10-8 m4 moment of inertia, 8x10-4 m2 cross-section, 7862.30 kg/m3 density, 1 m length, and 100 N initial load obtained first five natural frequencies respectively 16.29, 102.11, 285.95, 560.36, and 926.22 rad/s.
Co-Authors Abdul Rahman Adriyan, Adriyan Ahmad Jeni Anrinal Anrinal Anrinal Anton Bintarnel Arfidian Rachman Dedi Kuswanto Fikri Azhar Hafni Hafni Hendriwan Fahmi Idel Fitra Soni Ikhsan Febryan Irfan Mandala Putra Ismet Eka Putra Jendri Surianda Joko Sucipto Karnova Yanel Khairun Nizam M Aldi Putra Muhammad Fadherizal Muhammad Ilhamdi Nesti, Lisa Prasetyo Subekti Pratiwi, Putri Putri Pratiwi Rachmat Hidaya Rachmat Hidayat Rahmad Hidayat Reztu Illahi Rozi Saferi Rozi Saferi Ryan Adi Pratama Syafrul Hadi Yanto Darman Zultri Memori