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Jurnal Mekanik Terapan
Published by Politeknik Negeri Jakarta
ISSN : -     EISSN : 27471381     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Mekanik Terapan (JMT) adalah jurnal ilmiah yang terbit secara berkala dua kali setahun pada bulan Mei dan Oktober. Jurnal ini dapat digunakan sebagai sumber informasi ilmiah untuk peneliti, akademisi atau lembaga penelitian, insinyur industri, dan lembaga pemerintah. JMT memuat informasi bidang riset Mekanik Terapan berupa hasil riset dan Ulasan Ilmiah pada bidang: -Teknik Mesin dan Manufaktur -Energi (Konversi Energi, Renewable Energy, Applied Chemistry in Energy) -Mekatronika dan Robotika -Otomotif (Alat Berat dan Kendaraan Ringan) -Material dan Metalurgi -Teknik Pembangkit Tenaga Listrik
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 4 Documents
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Search results for , issue "Vol 7 No 1 (2026): April 2026" : 4 Documents clear
Design and Development of a Vertical-Type Hydraulic Ram Pump Simulator Widiawaty, Candra Damis; Millah, Azzam; Rasyid, Muhammad; Putri, Nuke Earlyana; Putri, Maytasha Gusti; Nurdiansyah, Muhammad; Fatin, Shafa Amatullah
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8238

Abstract

The hydraulic ram pump is one form of green energy used to convey water by utilizing the water hammer effect. The main parameter influencing the performance of a hydraulic ram pump is the water energy source. Most researchers modify the hydraulic ram pump design based on the installation site, which limits the variation of design or operating conditions due to the complexity and geographical constraints in the field. The main contribution of this work is the development of a vertical-type hydraulic ram pump simulator that enables controlled laboratory investigation of design modifications and operating parameter optimization, overcoming the limitations of site-specific field installations. The research applies a design and experimental method. The design process begins with defining design constraints and calculating the flow based on the Bernoulli equation, flow rate, head loss, and rule-of-thumb operational conditions for hydraulic ram pumps. The results show that the flow rate significantly affects the pump efficiency. Flow rates of 0.6 L/s, 0.8 L/s, 0.9 L/s, and 1 L/s. The range pressure of P1 are 50-60 mBar, 8-90 mBar, 80-120 mBar, and 100-140 mBar.  The range pressure of P2 are 120-125 mBar, 20-40mBar, 20-40mBar, and 85-120 mBar. Therefore, the yielded average efficiencies are 5.3%, 1.6%, 3.9%, and 3.5%, respectively. The developed hydraulic ram pump simulator achieved the highest efficiency (5.3%) at a flow rate of 0.6 L/s, P1 50-60 mBar, and P2 120-125 mBar. It can be observed that an increase in drive pipe flow rate does not always correspond to an increase in efficiency. However, the efficiency is more strongly determined by the pressure generated by the water hammer.
Design and Development of a Line-Following Automatic Guided Vehicle (AGV) Model as a Food and Beverage Delivery Platform Luqyana, Dhiya; Putri, Nuke Earlyana; Muslimin, Muslimin; Milah Muhamad, Azam
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8282

Abstract

An Automatic Guided Vehicle (AGV) is an automated vehicle used to support the delivery of food and beverages in restaurant service systems, where manual methods still carry risks of delays and spillage. This study designs and builds a line-following AGV using a Quality Function Deployment (QFD) approach with screening and scoring concepts to translate user needs into the technical specifications of the device. The research stages include needs identification, mechanical and electronic design, Arduino programming, and track testing. The AGV is capable of following a path with high accuracy using infrared sensors, automatically stopping at the destination, and detecting obstacles via ultrasonic sensors, with a buzzer serving as a delivery indicator. Test results show stable delivery performance with a relatively low spillage rate of 10%–13.33%. The AGV measures 40 × 30 × 43.6 cm, uses a 12 V battery, two DC motors, has a speed of 0.25 m/s, a maximum load capacity of 2 kg, and is controlled by an Arduino Uno with an integrated sensor system.
Evaluation of 850°C Heat Treatment: Effects of Used-Oil Quenching, Brine Quenching, and Pack Carburizing on the Rockwell Hardness of ST37 Shredder Blades Fajrul, Rahmat; Setyawan, Reinaldi Teguh; Ahmad, Zaid; Gunawan, Gunawan
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8320

Abstract

Waste shredder blades operate under abrasive contact and intermittent impacts from heterogeneous materials, making surface hardness a key property for maintaining cutting performance and reducing premature dulling. This study evaluates the effect of a 850°C heat-treatment route on the hardness of ST37 low-carbon steel used for shredder-blade applications. Plate specimens (100 mm × 100 mm × 10 mm) were prepared and tested under four conditions: untreated (as-received), pack carburizing using coconut-shell charcoal followed by furnace cooling, quenching in used oil, and quenching in saltwater (brine). Hardness was measured using the Rockwell C method (ASTM E18) with a diamond cone indenter (10 kgf minor load and 150 kgf major load). For each condition, ten hardness readings were collected and analyzed using one-way ANOVA (α = 0.05).The untreated specimens yielded an average hardness of 83.85 HRC. The pack-carburized and furnace-cooled condition resulted in a substantial decrease to 69.35 HRC, accompanied by higher variability, indicating a less favorable hardness response under the applied cooling route. In contrast, quenching after heating at 850°C increased hardness to 85.55 HRC for used-oil quenching and 88.35 HRC for brine quenching, with brine showing the highest mean value but also a wider scatter. ANOVA confirmed that the treatment route significantly influenced hardness (p < 0.05). Overall, the results indicate that, under the present parameters, quenching routes are more effective than the pack carburizing + furnace cooling route for improving blade hardness, while process consistency is important to control hardness dispersion, particularly for brine quenching.
Characterization and Modeling of Pedal Torque in a Regenerative Bicycle Trainer Using Current Control Prayoga, Adi; Mauludi, Fajar; Sabilul Huda, Muhammad Ravi; Putri Herwandi, Kasih Aisyah; Darmawan, Adytia; Satriyanto, Edi; Arief, Zainal
Jurnal Mekanik Terapan Vol 7 No 1 (2026): April 2026
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v7i1.8357

Abstract

Regenerative bicycle trainers support more sustainable indoor cycling by converting a rider’s kinetic energy into electrical energy while producing a controllable resistive load. For a realistic riding feel, the relationship between commanded braking current and pedal torque must be accurately defined. This study develops and validates an empirical current-torque model for a trainer based on a brushless direct current (BLDC) motor using a second-order polynomial. Experiments were conducted on two sprocket configurations (32-tooth and 12-tooth), with 11 braking current setpoints ranging from 0 to 10 A under steady-state conditions. The model was evaluated through its inverse form using five torque setpoints for each configuration. Results show strong agreement with experimental data, with coefficients of determination ( ) exceeding 0.998. The 12T configuration achieves higher accuracy, with a Mean Percentage Error of 1.55%, compared to 9.20% for the 32T configuration. This is likely due to improved torque transmission and more stable friction drive behaviour at higher loads. Negative quadratic coefficients indicate mild nonlinearities consistent with magnetic saturation. The model is suitable for feedforward control, enabling realistic torque simulation without requiring expensive external torque sensors.

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