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Michael Rembet
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SIMULASI RESPON FREKUENSI FILTER BUTTERWORTH DAN CHEBYSHEV TIPE II AKIBAT EKSITASI SINYAL ACAK Michael Rembet; Arwanto Lakat; Hengky Luntungan
Jurnal Tekno Mesin Vol. 5 No. 2 (2019)
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Penelitian ini bertujuan agar beda magnitudo pada pengukuran FRF yang menggunakan AAF jenis Butterworth dan Chebyshev Tipe II serta dieksitasi dengan sinyal acak dapat diketahui. Selain itu, penggunaan AAF dilakukan dalam simulasi dengan bantuan perangkat lunak Matlab©. Pembangunan filter dan pembangunan sinyal eksitasi juga dilakukan dengan bantuan perangkat lunak Matlab©. Beda terkecil magnitudo pada AAF jenis Butterworth adalah delapan persen dan pada AAF jenis Chebyshev Tipe II adalah 8,5%. Eksitasi pada AAF jenis Butterworth dilakukan sebanyak sepuluh kali dan pada AAF jenis Chebyshev Tipe II dilakukan sebanyak 11 kali.Keyword: Filter Butterworth, Filter Chebyshev Tipe II, White Noise
PENGARUH PENGGUNAAN AAF PADA MSA HP3566A TERHADAP SIMULASI PENGUKURAN FRF DENGAN BANTUAN METODE SOLUSI NUMERIK UNTUK PERSAMAAN DIFERENSIAL Michael Rembet
Jurnal Tekno Mesin Vol. 2 No. 2 (2015)
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Perangkat akusisi data digital seperti MSA (Multichannel Spectrum Analyzer) buatan Hewlett Packard tipe HP3566a, sering digunakan dalam pengukuran FRF (Fungsi Respon Frekuensi). Agar pengaruh aliasing terhadap spektrum sinyal yang diakusisi pada pengukuran FRF dapat ditekan, maka rangkaian AAF (Anti Aliasing Filter) digunakan sebagai bagian dari perangkat akusisi data. Namun, akibat penggunaan rangkaian tersebut, spektrum yang ditampilkan dapat berbeda dibandingkan dengan spektrum sistem yang diukur.Pengaruh penggunaan AAF pada MSA HP3566a terhadap hasil pengukuran FRF diungkapkan dalam penelitian ini. Perhitungan persamaan FRF digunakan sebagai metode simulasi pengukuran FRF. Perhitungan dilakukan dengan bantuan Metode Solusi Numerik untuk Persamaan Diferensial. Hasil perhitungan dengan bantuan metode ini berupa fungsi domain z. Berdasarkan fungsi ini, fungsi transfer dapat ditentukan. Berikutnya FRF sistem uji dapat ditunjukkan dalam diagram Bode. Pengaruh penggunaan AAF terhadap hasil pengukuran FRF kemudian ditentukan dengan cara, diagram Bode FRF tanpa AAF dan diagram Bode FRF dengan AAF saling dibandingkan.Pembandingan antara diagram Bode FRF tanpa AAF dan diagram Bode FRF dengan AAF menunjukkan bahwa kedua diagram tersebut berbeda. Pada pembandingan ini, diagram Bode FRF waktu diskrit tanpa AAF menunjukkan penurunan frekuensi pribadi teredam dari sistem sebesar 13,81 %. Selain itu, juga terdapat penurunan magnitudo sebesar 74,83 %. Ini berarti, perhitungan dengan bantuan Metode Solusi Numerik untuk Persamaan Diferensial mempengaruhi hasil simulasi penggunaan AAF pada pengukuran FRF.Kata kunci : Anti Aliasing Filter, Pengukuran FRF, Metode Solusi Numerik untuk Persamaan Diferensial
IDENTIFIKASI ANTI ALIASING FILTER YANG TERDAPAT PADA MSA BUATAN HP TIPE HP3566A DENGAN BANTUAN METODE TRANSFORMASI TRAPESIUM Michael Rembet; Stenly Tangkuman
Jurnal Tekno Mesin Vol. 1 No. 3 (2015)
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Pengukuran sinyal getaran dapat dilakukan dengan bantuan perangkat akusisi data digital. Salah satu contoh perangkat ini adalah MSA (Multichannel Spectrum Analyzer) buatan Hewlett Packard tipe HP3566a. Pada perangkat akusisi data tersebut digunakan rangkaian AAF (Anti Aliasing Filter) yang bertujuan untuk menekan pengaruh aliasing terhadap spektrum sinyal yang diakusisi. Sayangnya penggunaan AAF tidak disertai informasi parameter seperti jenis dan orde filter.Dalam penelitian ini, diungkapkan tentang identifikasi AAF pada MSA HP3566a. Identifikasi tersebut dilakukan dengan cara suaian kurva (curve fitting) Magnitudo FRF dari AAF dengan kurva Magnitudo AAF teoritik. Selain itu, suaian kurva juga dilakukan pada kurva Fasa FRF dari AAF dengan kurva Fasa AAF teoritik. Kurva Magnitudo dan Fasa AAF teoritik diperoleh dengan bantuan metode transformasi Trapesium.Berdasarkan pengukuran FRF dari AAF, disimpulkan bahwa AAF pada MSA HP3566a merupakan filter lalu rendah (low-pass filter). Filter tersebut terdiri dari dua buah filter jenis Butterworth berorde delapan yang terhubung seri.Kata kunci: Anti Aliasing Filter, Metode Trapesium
SIMULASI PENGARUH JUMLAH EKSITASI PADA FILTER CHEBYSHEV TIPE I TERHADAP NILAI RATA-RATA MAGNITUDO SINYAL ACAK Michael Rembet
Jurnal Tekno Mesin Vol. 8 No. 2 (2022)
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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ABSTRAK Dewasa ini pengukuran sinyal getaran dilakukan dengan bantuan perangkat akusisi data digital. Pada perangkat akusisi data tersebut digunakan rangkaian filter. Sayangnya penggunaan filter dapat mengakibatkan perubahan spektrum yang diperoleh. Dalam penelitian ini, pengaruh jumlah eksitasi pada filter analog terhadap nilai rata-rata magnitudo diungkapkan. Pengungkapan tersebut dilakukan dengan bantuan simulasi. Filter yang akan dieksitasi adalah filter Chebyshev tipe I berorde lima. Simulasi itu dilakukan dengan cara filter dieksitasi oleh sinyal acak. Mula-mula, eksitasi ini dilakukan sebanyak sepuluh kali. Sinyal acak tersebut, dibangkitkan dengan bantuan perangkat lunak. Setelah itu, respon filter dalam domain waktu ditransformasi ke domain frekuensi. Pada domain frekuensi, respon filter di tiap frekuensi kemudian dirataratakan. Namun selang frekuensi yang dirataratakan tersebut berada pada selang frekuensi di sekitar frekuensi potong (cut off frequency). Selanjutnya simulasi dilakukan untuk jumlah eksitasi hingg 150 kali dengan selang pertambahan sebesar sepuluh kali. Berdasarkan simulasi yang dilakukan, disimpulkan bahwa nilai terbesar dari persentase tertinggi beda magnitudo adalah 67 % pada jumlah eksitasi sebanyak satu kali. Di lain  pihak nilai terendah dari persentase tertinggi beda magnitudo adalah 3,5 % pada jumlah eksitasi sebanyak 150 kali. Ini berarti semakin banyak jumlah eksitasi, semakin kecil pula persentase tertinggi beda magnitudo. Kata kunci : Filter Chebyshev Tipe I, Simulasi Eksitasi, Sinyal Acak
SIMULASI PENGARUH PENGGUNAAN FILTER CHEBYSHEV TIPE II PADA MASUKAN SINYAL GETARAN ACAK TERHADAP NILAI RATA-RATA MAGNITUDO Henci Smartenlike Lokollo; Jotje Rantung; Michael Rembet
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 2 No. 1 (2013): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Filter in this research is interpreted as screening of undesirable frequency component in order to depressed it as small as possible to produce the changes of magnitude of response signal. The filtered vibration signal is in a form of the Random Signal Excitation which is generated in MATLAB Version 6.5. The signal is filtered by using Filter Chebyshev Type II. Simulation conducted repeatedly from 10 to 100 times excitation. Magnitude of Response Filter is obtained after simulation. Result is compared to its initial and expressed in the form of different percentage of magnitude between the mean of Magnitude of Response Filter because of applying Random Excitation Signal to the Excitation of Signal Impact from 10 to 100 times. Maximum different percentage of highest magnitude occurred in the simulation of 10 times excitation (57%). While the Minimum occurred in the simulation of 50 times (32%). Keyword : Filter Chebyshev of Type II, Random Excitation, Different Percentage Magnitude.
PERANCANGAN KONVEYOR RANTAI KAPASITAS 8 TON PER JAM Angrian Rante; Stenly Tangkuman; Michael Rembet
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 2 No. 2 (2013): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Conveyor is an auxiliary equipment in a production process. The main component of a chain conveyor is chain . This chain is driven through a sprocket which is connected to an electric motor through a reduction gear. Process of designing a chain conveyor required several parameters that are : the characteristics of the transported material, conveyors geometry, conveyors capacity and conveyor speed. Design resulted in chain dimension and the required motor power. Comparing the design to the existing conveyor as a case of study, it was found that the electric motor used is larger than necessary which in turn that the speed of the chain there can still be improved in order to increase production capacity. Keywords : Design , Chain-Belt Conveyors, Conveyor Capacity
OPTIMASI DIAMETER POROS TERHADAP VARIASI DIAMETER SPROKET PADA RODA BELAKANG SEPEDA MOTOR Daswin Basselo; Stenly Tangkuman; Michael Rembet
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 1 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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The rear wheel shaft of a motorcycle is classified as an axle which is supporting the bearing so that the rear tire rotated well. This study is aimed to get the optimum diameter of shaft which is capable of withstanding the load in accordance with the existing load conditions, and analyzing the torque ratio between the front and rear sprocket which have varied diameter. Optimization modeling program is using Matlab 2010. Optimization is done by using objective variable function accompanied with constraints in terms of stress and deflection on the rear axle while supporting the loads. The results of Optimization are Do 14 mm and Di 12,0889 mm, 12,0817 mm, 12,0627 mm, 12,0597mm with factory standard power of motorcycle (8426,41 Nm/s) which is complying to optimization rules.  The optimization result shows the decreasing of  inner diameter of the shaft along with increasing the sprocket’s diameter. Key word : Shaft, optimization, outer diameter (Do), inner diameter (Di).
SIMULASI PENGARUH PENGGUNAAN FILTER BUTTERWORTH PADA MASUKAN SINYAL GETARAN ACAK TERHADAP NILAI RATA-RATA MAGNITUDO Orlando Farcend Ficdy Tumbelaka; Jotje Rantung; Michael Rembet
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 4 No. 2 (2015): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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ABSTRACT Filter in this research is interpreted as screening of undesirable frequency component. In this research, the highest different percentage of magnitude for the 15, 30, 45 until 150 times of excitation can be obtained. The impact excitation signal and the random excitation signal were develop using Matlab version 6.5. The random and impact signal then filtered using Butterworth filter. The excitation of random signal was develop using Matlab version 6.5. The simulation of random signal was proceed repeatedly over 15, 30, 45 until 150 times of excitation. The simulation resulted the average numbers of filter magnitude response. Which is then compared with the impact excitation signal indicated by percentage difference. Based on the results of simulation and calculation the maximum different percentage of highest magnitude occurred in the simulation of 15 times excitation (50%). The chart of the different percentage of highest magnitude tend to be flat at the 60 times until 150 times of excitation. While the average numbers of filter magnitude response due to the random signal excitation can not be considered as same as the numbers of filter magnitude response due to the impact signal, because the difference is above 5%. Keyword: Butterworth filter, random excitation signal, percentage difference of magnitude
PERANCANGAN RANGKA GOKAR LISTRIK Hafidz Ammar Haryono Putro; Stenly Tangkuman; Michael Rembet
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 4 No. 2 (2015): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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ABSTRACT The purpose of this research is to get a design of a frame for an electric gokart. The frame serve as a foundation for putting the vehicle body, engine, steering systems, and other components. This research was conducted using structural statics calculation and mechanics of material strength that can determine the load on the frame and the maximum load that can be sustained by the frame. In this design of electric gokart frame using a ST 37 pipe tube material which has a yield strength at allowable strength at 117,5 MPa. The tube has a outer radius 12,7 mm and inner radius 12,5 mm. The results of this design is an engineering drawing of an electric gokart frame. Keyword: Design, Frame, Yield strength, Allowable Strength.
PERANCANGAN SISTEM KEMUDI GOKAR LISTRIK Judisthira Frelly Mamahit; Stenly Tangkuman; Michael Rembet
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 5 No. 1 (2016): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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The function of steering system is to change the directions of wheel. The purpose  of this design is to be obtained a simple steering system. Beside that, in this work have been determined stresses, they are shear stress due to torsion and normal stress due to axial load and bending. Therefore, the strength of mechanism can be obtained. Based on the calculation, maximum  shear stress induce in steering system is 4,11 Pa and maximum normal stress is 0,206 Pa. moreover this design have been  obtained steering angle for some values of angle. The final  result of this design is some technical drawing that presented detail dimension of components. Keywords : Design, Steering System, Stress
Co-Authors Angrian Rante Arwanto Lakat Daswin Basselo Djill Van Itrantoi Hafidz Ammar Haryono Putro Hafidz Ammar Haryono Putro, Hafidz Ammar Haryono Henci Smartenlike Lokollo Hengky Luntungan Itrantoi, Djill Van Jotje Rantung Judisthira Frelly Mamahit Judisthira Frelly Mamahit, Judisthira Frelly Lakat, Arwanto Orlando Farcend Ficdy Tumbelaka Orlando Farcend Ficdy Tumbelaka, Orlando Farcend Ficdy Renova Sibarani Sibarani, Renova Stenly Tangkuman