Teknika STTKD: Jurnal Teknik, Elektronik, Engine

PEMANFAATAN LARGE LANGUAGE MODELS CHATGPT-4 UNTUK KONTROL DRONE: STUDI KASUS DJI TELLO

2024-03-15T08:58:51+07:00

This study explores the potential of using ChatGPT-4, a Large Language Model (LLM) from OpenAI, for creating flight trajectories for drones. The primary focus is on the DJI Tello drone, which is controlled through Python code to execute various flying commands. Unlike traditional approaches that involve direct programming in Python, this research utilizes ChatGPT-4 to automatically generate Python computer programs capable of instructing the drone. Results indicate ChatGPT-4's intriguing capability to produce the necessary code for flying the drone according to given commands. This suggests that LLMs like ChatGPT-4 can be employed to determine drone flight trajectories using human language, facilitating ease of use compared to traditional computer programming languages.

PENGARUH VARIASI SUHU SINTERING ALUMUNIUM MATRIK YANG DIPERKUAT KARBON NANOTUBE TERHADAP NILAI KEKERASAN

2024-03-14T14:17:22+07:00

This study examines the effect of sintering temperature variations on density values and Vickers hardness values on Aluminum Carbon Nanotubes. Tests were conducted using five temperature variations, namely sintering 400°C, 500°C, 600°C, 700°C, and unsintered. The results showed that the 400°C sintering temperature variation produced higher hardness values than the 500°C, 600°C, 700°C, and unsintered sintering temperature variations. AlCNT specimens at a sintering temperature of 400°C have an average hardness value of 46.92 VHN, while at a sintering temperature of 500°C have an average hardness value of 30.48 VHN, while at a sintering temperature of 600°C have an average hardness value of 29.04 VHN, while at a sintering temperature of 700°C have an average hardness value of 26.17 VHN, while at a sintering temperature of 0°C have an average hardness value of 39.79 VHN. Therefore, it is found that the best sintering temperature variation for AlCNT specimens is 400°C for the application of sintering to aluminum carbon nanotubes. In addition, this research can be a reference for further researchers in developing manufacturing methods and characterization of aluminum reinforced with carbon nanotubes to obtain optimal results.

PENGUJIAN KEAUSAN ALUMUNIUM MATRIX KOMPOSIT DIPERKUAT DENGAN KARBON NANOTUBE

2024-03-15T09:01:18+07:00

Wear testing of engineering materials is an important aspect in evaluating their performance and durability. This study aims to investigate the wear-resistant ability of aluminum composites reinforced with carbon nanotubes (CNTs). The composite manufacturing process was carried out by infiltrating CNTs into the aluminum matrix through powder metallurgy method. Tests were conducted using two methods, namely pressing and sintering with temperature variations of 0^oC (non sintering), 400^oC, 500^oC, 600^oC and 700^oC. The results showed that the specific wear value on the specimen obtained the best value at a sintering temperature of 400^oC with a value of 0.003632850 mm³/kg.m and the highest value at a sintering temperature of 700^oC with a value of 0.042771207 mm³/kg.m. And the wear rate on the specimen obtained the best value at a sintering temperature of 400^oC with a value of 0.447887285 mm³/s and the highest value at a sintering temperature of 700^oC with a value of 1.155387594 mm³/s. This shows that the addition of temperatures greater than 400^oC has a major influence on the specific wear value and wear rate of sintering products. In addition, this method is also a reference for further researchers in developing aluminum carbon nanotube technology to obtain optimal results.

ANALISA PERFORMA HEAT EXCHANGER DENGAN PENAMBAHAN VORTEX GENERATOR TIPE WIRECOIL GUNA MENCEGAH ICING PADA KARBURATOR

2024-03-28T11:46:26+07:00

This study aims to evaluate the influence of vortex wirecoil generators with different pitch variations on heat transfer coefficients, pressure drop, and heat exchanger effectiveness. The method involves experiments with a prototype heat exchanger simulation utilizing exhaust gas from a genset engine to address carburetor freezing issues in aircraft with piston engines, with a parallel flow configuration. The solution proposed involves using vortex generators and shell-and-tube heat exchangers. Shell and tube heat exchangers aim to improve heat exchange efficiency because the fluid flow in the pipes bends, creating significant secondary flow and enhancing heat transfer. This study involves various tools and components, including steel wire as the vortex wirecoil generator with size variations of 1.5, 2.5, and 3.5 cm. Other components consist of galvanized iron cells and copper tubes, as per the research plan. The research results indicate that pitch variations of wirecoil inserts in concentric pipes create turbulent flow that maximizes heat transfer to the air inside the cell. The 3.5 cm wirecoil yields the highest heat transfer coefficient U0 with an average value of 10.4. Additionally, adding variations of vortex wirecoil generators in concentric pipes increases the heat release from the hot fluid in the exhaust gas, enhancing heat exchanger effectiveness. The best effectiveness performance is achieved with a 2.5 cm wirecoil with an average value of 70.09.However, adding pitch variations of wirecoil inserts also disrupts the flow, changing it from laminar to turbulent, with the highest pressure drop occurring with the 3.5 cm wirecoil, with an average value of 17.89 Pa. These findings provide insights into improving efficiency and altering flow in heat exchangers through vortex wirecoil generator variations.

MANUFAKTUR UAV FIXED WING MENGGUNAKAN MATERIAL STYROFOAM DENGAN METODE LAY-UP (PELAPISAN) FIBERGLASS DAN RESIN

2024-03-17T14:17:34+07:00

This research discusses the development of a manufacturing process for a fixed wing-based UAV (Unmanned Aerial Vehicle) using Styrofoam material as the structural core. The manufacturing method applied is lay-up of fiberglass and resin to improve the strength and aerodynamic performance of the UAV. This research aims to evaluate the potential of styrofoam material enhanced by such lay-up technique. The research method involves the steps of applying fiberglass and resin lay-up on Styrofoam structure. The results of the Fixed Wing UAV Manufacturing research using Styrofoam material with fiberglass resin lay-up method, the aircraft structure becomes lighter and stronger with the overall resulting load reaching 2750 Gram or 2.75 kg. The results showed that the application of the lay-up method significantly improved the structural strength of the UAV, while the use of fiberglass and resin materials made a positive contribution to its aerodynamic performance. The invention has the potential to improve the efficiency and durability of UAVs in monitoring and surveillance applications. By presenting alternative materials and manufacturing methods, this research can contribute to the development of more reliable and effective UAV.

PENGEMBANGAN KOMPOSIT SERAT SABUT KELAPA SEBAGAI BAHAN PEMBUATAN RANGKA SURVEILLANCE DRONE

2024-03-28T14:22:53+07:00

Coconut fiber is an alternative material to replace metal. Coconut fiber was chosen because it is easy and widely found in Indonesia and is easily decomposed naturally. Even though its strength is much lower than metal, coconut fiber can be used to make objects that do not require a lot of strength, one of which is drones. In this research, coconut fiber composites were made and tensile tested to determine their strength for use as a frame for small surveillance drones. The composite is made by mixing coconut fiber mat (as fiber) and Unsaturated Polyester (as resin) using the hand lay-up method. Coconut fiber composites are tested according to ASTM D-638 standards. Based on the tensile test results in this research, it was found that the coconut fiber composite had a tensile strength of 18 MPa. Then this number is used as a benchmark in determining the size of the surveillance drone frame to be designed. Based on the results of the calculations carried out, it was found that the thickness required for a drone frame made from coconut fiber is 4 mm

ANALISA AIRFOIL DENGAN METODE CFD MENGGUNAKAN ANSYS STUDENT 2024

2024-04-18T14:38:28+07:00

Penelitian ini fokus pada analisis airfoil dengan metode Computational Fluid Dynamics (CFD) menggunakan Ansys Student 2024. Model penelitian ini meniru model aliran dalam terowongan angin untuk menentukan parameter-parameter dari sebuah airfoil pada beberapa macam sudut serang, dan menggunakan situs Airfoiltools.com untuk memperoleh data geometri airfoil yang diperlukan. CFD mampu menangani efek seperti kompresibilitas, viskositas, turbulensi, dan pertukaran panas tapi dalam penelitian ini dibatasi pada aliran yang non kompresibel tapi mengandung viskositas.

Proses pembuatan batas interior/airfoil melibatkan pemindahan data dari airfoiltools.com kedalam Spaceclaim, sebuah modul dari Ansys Student 2024. Distribusi mata jaring (mesh) ditentukan menggunakan strategi ukuran berjenjang, yaitu ukuran dasar semua domain, diperkecil lagi dengan menggunakan sphere of influence rangkap dua, dan diperhalus lagi dengan Inflasi mesh pada permukaan airfoil.

Penelitian ini membahas hasil analisa CFD menggunakan Ansys Student 2024 dan perbandingannya dengan data lain serta interpretasinya terhadap aliran dalam dunia nyata.

INVESTIGASI EFEKTIVITAS HEAT EXCHANGER STRAIGHT TUBE DOUBLE V-CUT TWIST TAPE INSERT MEMANFAATKAN GAS BUANG MENGATASI ICING KARBURATOR PISTON ENGINE

2024-04-27T14:43:33+07:00

A piston engine is a type of engine that uses a piston mechanism as its main component. How this engine works involves burning fuel such as hydrocarbon or hydrogen compounds to push the piston. One of the important components in a piston engine is the carburetor, which is responsible for regulating the air and fuel ratio, controlling engine performance, as well as mixing fuel and air to form a mixture that can burn into mechanical energy. Aircraft equipped with piston engines can reach a flight altitude of up to 12,000 feet or around 3657.6 meters. The research conducted employs a simple experimental method process with the construction of a prototype and a heat exchanger simulation that utilizes exhaust gas from a genset engine to prevent carburetor freezing in the piston engine. One of the analyzed components is the vortex generator with a special configuration, namely the Double V-Cut Twist Tape Insert. The results of the research show that changing or increasing the shape of the vortex generator, inside a straight pipe, can produce turbulent air flow and increase heat transfer to a cooler medium, in this case the air inside the shell, while maximizing the heat transfer from the temperature fluid. high in exhaust gases. In contrast to these conditions, maximum heat absorption occurs in the low temperature fluid inside the shell. From this research it is concluded that modifications to the vortex generator, especially with the use of Double V-Cut Twist Tape Insert, can influence the overall heat transfer coefficient (Uo) by 0% at Twist 3, 4% at Twist 4, and 23% at Twist 5. There is a pressure drop (∆P) of 0% on Twist 3, -22.0% on Twist 4, and 21% on Twist 5, and the effectiveness (ε) of the heat exchanger on Twist 3 is 0.0%, Twist 4 is - 0.9%, and Twist 5 at -5.9%.