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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Journal of Telecommunication and Electrical Scientific
Umurani, K
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Aerospace Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Pengaruh Jumlah Sudu Prototype Pembangkit Listrik Tenaga Mikrohidro Tipe Whirlpool Terhadap Kinerja Umurani, K; Siregar, Ahmad Marabdi; Al-Amin, Surya
Rekayasa Material, Manufaktur dan Energi Vol 3, No 2: September 2020
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v3i2.5272

Abstract

The water turbine is a device that converts water flow energy into shaft mechanical energy. Before being converted into mechanical energy in the turbine, the potential energy needs to be converted into kinetic energy first. The vortex will move the turbine blades which cause the runner to rotate so that there is a change in the kinetic energy of the water into mechanical energy in the turbine which is used to drive the generator and then into electrical energy. The purpose of this research is to analyze the torque that occurs on the shaft and turbine power. Water is flowed to the test with a pump through a control valve. The water flow is read by a rotameter attached to the pipe to the upper reservoir, while the torque is measured using a load cell, while the rotation is measured using a photo sensor interrupt to read the movement of the counter wheel. Data from load cell and photo sensor interruptor is read using Arduino Uno then the data is stored on laptop in excel file using plx-daq software. The minimum torque for the 8 blades is 9,12 kg.mm and 7.61 kg.mm for 6 blades at a water flow rate of 90 l / min. The maximum torque occurs at the 8 blades of 10.06 kg.mm while the maximum torque at blade 6 is 9,12 kg.mm at the same water flow rate of 150 l / min. The minimum turbine power for the 8 blades is 0.47 W and 0.27 W for the 6 blades at a water flow rate of 90 l / min. The maximum turbine power at blade 8 is 1.03 W, while the maximum power at blade 6 is 0.91 W at the same water flow rate of 150 l / min. From the data analysis, it can be seen that the power for the turbine with the number of blades 8 tends to be greater than the power for the turbine with 6 blades, but if the percentage increases in power between the 8 blades and 6 blades the trend decreases even though the flow rate is increasing.
Performance Analysis Of An Iot-Based 3-Dof Robotic Arm: A Case Study On Latency And Payload Variations Umurani, K; Nasution, AR; Gultom, MH; Putra, TA; Efrida, R; Fauzan, RD
Journal of Telecommunication and Electrical Scientific Vol. 2 No. 02 (2025): Journal of Telecommunication and Electrical Scientific (JTElS)
Publisher : Universitas Harapan Medan

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Abstract

Digital transformation in the manufacturing sector demands the integration of efficient and responsive robotic systems. This study aims to analyze the performance of an Internet of Things (IoT)-based 3-Degree of Freedom (DOF) robotic arm, focusing on latency testing and payload variations. Conducted at the UMSU Mechanical Engineering Laboratory, the research utilizes an ESP32 microcontroller as the central processing unit and the Blynk platform as the wireless control interface. The robot's physical structure was fabricated using 3D printing technology, while joint actuation is powered by MG996R servo motors with an 11 kg/cm torque capacity. Electrical parameters were measured using a Fluke 17B+ digital multimeter to precisely monitor current consumption. Performance evaluation encompasses a multi-parameter analysis integrating information technology aspects, such as IoT network latency, with mechanical aspects including payload variations (15g, 35g, and 50g) and pick-and-place operational success. The IoT-based 3-DOF robotic arm control system was successfully implemented. The robot responded to commands within 0.5–0.9 seconds on a stable network. Performance is highly dependent on Wi-Fi signal quality, with latency increasing to >1 second at extended distances or when obstructed.
Co-Authors Ahmad Marabdi Siregar Al-Amin, Surya Efrida, R Fauzan, RD Gultom, MH Nasution, AR Putra, TA