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Analisis Tegangan pada Belokan Pipa Marine Boil Off Gas (MaBOG) Berbasis Metode Elemen Hingga Rudi Kurniawan; Arhami Arhami; Rahmatsyah Maksum Ramsi
Jurnal Teknik Mesin Unsyiah Vol 6, No 2 (2018)
Publisher : Jurnal Teknik Mesin Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jtm.v6i2.18231

Abstract

This paper discusses the stress analysis of marine boil off gas pipe elbow. The piping system receives several loading conditions such as expansion load, occasional load, operation load, and sustain load, which are referred to as static loading conditions. As a result of the load conditions can be known stress distribution and examine the strength of the weld connection on the pipe elbow. The purpose of this research is to know the distribution of stress at the elbow of the pipe due to static loading conditions. The method used in this study using finite element analysis. The result of stress simulation in pipe elbow is 771 Pa and the result of calculation of stress in pipe elbow is 3,94 Pa. The result of piping system simulation shows the value of the pipe elbow e due to the load operation of 23151,34 kPa, the sustain load is 24918,91 kPa, the occasional load is 59110,83 and the expansion load does not produce the stress value. From the results of the analysis, the stress due to operating, sustain, and expansion loads are categorized as safe because they do not exceed the allowable stress values of each loading condition.
Accumulator-free Hough Transform for Sequence Collinear Points Rudi Kurniawan; Zahrul Fuadi; Ramzi Adriman
Aceh International Journal of Science and Technology Vol 10, No 2 (2021): August 2021
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (494.196 KB) | DOI: 10.13170/aijst.10.2.20894

Abstract

The perception, localization, and navigation of its environment are essential for autonomous mobile robots and vehicles. For that reason, a 2D Laser rangefinder sensor is used popularly in mobile robot applications to measure the origin of the robot to its surrounding objects. The measurement data generated by the sensor is transmitted to the controller, where the data is processed by one or multiple suitable algorithms in several steps to extract the desired information. Universal Hough Transform (UHT) is one of the appropriate and popular algorithms to extract the primitive geometry such as straight line, which later will be used in the further step of data processing. However, the UHT has high computational complexity and requires the so-called accumulator array, which is less suitable for real-time applications where a high speed and low complexity computation is highly demanded. In this study, an Accumulator-free Hough Transform (AfHT) is proposed to reduce the computational complexity and eliminate the need for the accumulator array. The proposed algorithm is validated using the measurement data from a 2D laser scanner and compared to the standard Hough Transform. As a result, the extracted value of AfHT shows a good agreement with that of UHT but with a significant reduction in the complexity of the computation and the need for computer memory.
Perancangan Dan Pengujian Model Mobil Robot Penanam Bibit Kangkung Rizki Aulia Nanda; Arhami Arhami; Rudi Kurniawan
Rona Teknik Pertanian Vol 13, No 2 (2020): Volume 13, No. 2, Oktober 2020
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v13i2.16982

Abstract

Abstrak. Penanaman bibit kangkung sesuai prosedur dilakukan dengan proses menajuk, proses menajuk memakan waktu yang lama, sehingga membuat petani melakukan penaburan bibit untuk mempersingkat waktu peanaman, namun berpotensi terjadi gagal panen akbiat bibit tidak tertanam. Tujuan penelitian ini yaitu membangun mobil robot penanam bibit kangkung. Metode yang diperlukan dalam membangun mobil robot ini meliputi, penghitungan rata-rata bedengan, perancangan mobil robot, perakitan, dan pengujian. Dari metode tersebut maka diperoleh hasil yang meliputi desain dan analisis desain, hasil pembuatan/perakitan, hasil pengujian dan hasil penanaman. Desain mobil robot memiliki ukuran sesuai ukuran rata-rata bedengan yang digunakan petani yaitu 1,6  m, hasil analisis menunjukan beban maksimum robot 28,80 kg dengan perpindahan maksimal 3,266 mm yang membuat chassis masih aman digunakan.Proses perakitan mobil robot meliputi komponen elektronika dan komponen chassis sesuai dengan hasil desain dan perancangan. Robot yang telah dirakit dilakukan pengujian. Pengujian elektronika menampilkan keluaran arus sebesar 3A, tegangan 12 volt dan tahanan 5,4 ohm, pada penggunaan baterai dengan kapasitas 7,4 Ah yang dapat bekerja selama 4,5 jam dengan menggunakan stepdown supaya arus stabil membuat kecepatan stabil dan tidak membuat komponen mobil robot hangus akibat loncatan tegangan. Karena mobil robot bekerja secara autonomous maka pengujian vision juga diperlukan sebagai indra penglihatan gerak pada mobil robot. Selama 4,5 jam mobil robot dapat menanam bibit dengan luas lahan 4,7 hektar (4788 m2).Design and Testing Mobile Robot Spinach Water Seed PlantingAbstract. Planting water spinach seeds according to the procedure were carried out by the process of crowning, the process took a long time, so it made farmers sow seeds to shorten the planting time, but there was a potential for crop failure due to not planting the seeds. The purpose of this research was to build a mobile robot water spinach seed planting. The methods needed to build this robot car included calculating the average bed, designing a robot car, assembling, and testing. From this method, the results obtained included design and design analysis, manufacturing/assembly results, testing results, and planting results. The mobile robot design had a size according to the average size of the beds used by farmers, namely 1.6 × 1.4 × 0.5 m, the analysis results showed that the robot's maximum load was 28.80 kg with a maximum displacement of 3.266 mm which made the chassis still safe to use. The robot car assembly process included electronic components and chassis components in accordance with the design and design results. The assembled robot was tested. Electronic testing displayed a current output of 3A, a voltage of 12 volts, and a resistance of 5.4 ohms, on the use of a 7.4 Ah battery that can work for 4.5 hours using a step down so that the current was stable to make the speed stable and did not make robot car components scorched due to voltage jumps. Because robot cars worked autonomously, vision testing was also needed as a sense of motion in robot cars. During 4.5 hours the robot car can plant seeds with a land area of 4.7 hectares (4788 m2).