E-Journal Politeknik Negeri Cilacap
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Design and Implementation of a 3-Phase Induction Motor Controller Simulator Using Programmable Logic Controller (PLC) and Human Machine Interface (HMI) Integration
No full textThis study was conducted as a response to the limited availability of practical learning tools in industrial automation education and training. In this research, a three-phase induction motor control simulator was designed and developed by integrating a Programmable Logic Controller (PLC) and Human Machine Interface (HMI) system. The main objective is to enhance learners\u27 understanding and practical skills in designing and operating industrial control and automation systems through an interactive learning approach. The development process involved designing the system architecture using an Omron CP2E PLC and NB-series HMI, electrical integration, ladder diagram programming, and user interface development. The simulator was then tested to ensure its proper functionality and effectiveness in supporting the learning process. The results demonstrate successful system integration, reliable control logic, and an intuitive user interface via the HMI. This research contributes a structured and cost-effective educational tool that is well-suited for automation engineering and technical training programs
Rancang Bangun Pembangkit Listrik Tenaga Surya Off-Grid dan On-Grid Sebagai Media Pembelajaran Mahasiswa
Full text linkThis study examines the performance of solar photovoltaic (PV) systems with off-grid and on-grid configurations as practical learning media at Politeknik Kotabaru. The testing was conducted on AC loads with parameters including solar radiation intensity, voltage, current, and the power stored in the battery. Monocrystalline and polycrystalline solar panels were used to compare energy conversion efficiency. The results show that monocrystalline panels perform better than polycrystalline panels, with average differences in power and efficiency of 1,30 W and 0,50% in the off-grid system, and 1,11 W and 0,44% in the on-grid system. Solar radiation intensity significantly affects output power and conversion efficiency, with the highest power of 49,28 W obtained at the maximum radiation intensity of 1015 W/m². This study confirms that the PV system trainer can serve as an effective learning medium to enhance students’ competence in understanding the differences between off-grid and on-grid systems
Simulasi variasi sudut lidah volute casing terhadap kecepatan aliran udara pada blower tipe forward blade
No full textOptimization of volute design is essential for the performance of centrifugal pumps and blowers. This study investigates the effect of volute tongue angle variation on air velocity and flow rate in volute casing design using flow simulations. The volute design was tested with tongue angles of 15°, 30°, 45°, 60°, and 75°, based on theoretical equations of flow rate and volute radius. Simulation results indicated that increasing the volute tongue angle enlarges the volute cross-sectional area. Generally, this enlargement decreases air velocity but increases the flow rate. A 75° tongue angle produced the highest flow rate of 4.860 m³/s, while the highest velocity, 21.35 m/s, was observed at 15°. This behavior aligns with the principle of mass conservation, where a larger cross-sectional area leads to reduced fluid velocity. These findings suggest that volute designs with larger tongue angles can optimize the flow capacity.Blower tipe centrifugal banyak dibutuhkan oleh industri sebagai sirkulator udara pada sebuah sistem, seperti sistem pengering biji-bijian untuk membuat benih tanam. Sistem pengering bekerja menyemburkan udara kering ke biji-bijian agar kadar air dapat berkurang. Tujuan penelitian adalah merancang, dan menganalisis hasil simulasi kinerja volute casing blower centrifugal dengan variasi sudut lidah volute terhadap kecepatan aliran udara yang dihasilkan. Metode penelitian yang digunakan adalah deskriptif kuantitatif, dimana data simulasi ditampilkan dalam bentuk grafik untuk mengamati hubungan antara variasi nilai sudut terhadap kecepatan aliran fluida. Hasil simulasi menunjukkan semakin besar sudut lidah volute mengakibatkan luas area penampang semakin besar sehingga menyebabkan semakin rendah nilai kecepatan aliran udara. Kecepatan rerata tertinggi tercatat sebesar 20,89 m/s pada sudut lidah volute 15o. dengan luas area penampang 172515mm2. Kecepatan rerata terendah sebesar 15,13 m/s pada sudut lidah volute 60o dengan luas area penampang 262260 mm
Pengaruh Penambahan Konfirgurasi Foam Nine Cell Square Crash box terhadap Pola Deformasi dan Penyerapan Energi
Full text linkCrash box is a crucial component in a vehicle\u27s structure, designed to absorb impact energy. Crash box design has been developed to improve energy absorption capability. In this study, the square nine-cell crash box is varied with foam configuration. The addition of foam was chosen due to its lightweight as a filler for crash box. The research method used a computer simulation using ANSYS software. The nine-cell square crash box model consists of three squares, each with a length of 30 mm, 50 mm, and 65 mm, with a connecting rib thickness of 2 mm. Crash box performance is evaluated based on energy absorption and deformation patterns. Frontal load modeling on crash box was modeled with a speed of 12 m/s. Based on the simulation results, it can be found that the configuration of foam on the crash box affects the absorption energy and deformation patterns. The CF-CB 3 model provides energy absorption of 34% compared with no foam crash box due to a more uniform deformation pattern
Analisa Tegangan dan Deformasi Pada Desain Kursi Menggunakan Finite Element Method Dengan Variasi Pembebanan
Full text linkThe manufacturing process is an activity of processing raw materials into products to increase added value. One of these products is chair furniture; to reduce errors and failures in its manufacture, it is necessary to do prototype model experiments first. This research conducts a simulation study and analysis of the chair design on stress, deformation and safety factor using the Finite Element Method approach with the help of ANSYS ADPL 18.0 static structural software where the chair design is made of 304 stainless steel, aluminum-T6, HCP 30 polymer foam in one chair structure by simulating several static load loading scenarios, boundary conditions, and even distribution on the surface of the chair. The simulation results show that the highest maximum stress distribution (von misses stress) is 3.5 Mpa at a pressure of 175 kg.f, for the lowest value of 1.5 Mpa at a pressure of 5 Kg.f and a deformation (displacement) of 0.145x10ˉ4 mm occurs at a pressure of 175 Kg.f, while the lowest deformation value of 0.621x10ˉ5 occurs at a pressure of 75 Kg.f, This is due to the loading increasing along with the applied pressure force, but still in the minimum safety factor standard position for static loads, so as not to damage the geometric structure
Desain dan Pengujian Predictive Maintenance Agitator Berbasis Internet of Things untuk Sistem Pengolahan Air
Full text linkAgitators play an important role in the mixing, coagulation, and flocculation processes in the water treatment industry. An Internet of Things (IoT)-based predictive maintenance system was designed for early detection of agitator anomalies, including shaft imbalance/misalignment, bearing degradation, slip/RPM drop due to overload, and motor overheating. The system uses ESP32 as an edge device with an SW-420 (vibration pulse) sensor, a DS18B20 (motor temperature) sensor, and a Hall effect sensor (RPM). Data is sent via MQTT to the cloud server for real-time visualization on the dashboard. Validation against the reference instrument showed a MAPE of 0.518% and a correlation of 0.999. Anomaly warnings are triggered when the temperature is 69.5–70°C (critical 72°C) and vibration exceeds the 3σ threshold (warning 410 pulses; critical 550 pulses)
Sistem Internet of Things untuk Pemantauan Suhu Reaktor Biogas secara Real-time
Full text linkThis study developed an Internet of Things (IoT)-based system for real-time temperature monitoring of a household biogas reactor. Temperature fluctuations during anaerobic fermentation affect methanogenic microorganism activity and reduce biogas yield. The proposed system utilizes an ESP32 microcontroller, DS18B20 waterproof temperature sensor, LCD display, and Blynk application as a cloud-based monitoring platform. The study involved field observation, system design, implementation, and seven-day testing with a one-minute data logging interval. Results showed that the system operated stably without significant connection loss and provided consistent readings within the 31–33 °C mesophilic range, optimal for anaerobic digestion. The DS18B20 sensor achieved an accuracy of ±0.5 °C compared to a reference thermometer. The system enables operators to monitor fermentation conditions in real time via smartphone or local display, allowing faster response to temperature variations. This research demonstrates that IoT implementation is effective for enhancing temperature monitoring efficiency and offers potential for future automated temperature control development to support energy-independent rural communities. This study contributes to the design of a reliable, low-cost IoT monitoring system for household-scale biogas reactors
Pengaruh Ketebalan Orifis Terhadap Karakteristik Hidrodinamik Oksigen Terlarut pada Microbubble Generator Tipe Porous-Orifis
Full text linkThis study aims to analyze the effect of orifice thickness on the performance of a porous-orifice microbubble generator (MBG) in aeration processes, particularly concerning the enhancement of dissolved oxygen (DO) concentration and the volumetric oxygen mass transfer coefficient (KLa). The primary issue identified is the limited number of studies that explicitly address the role of orifice thickness as a critical geometric parameter influencing microbubble formation and oxygen transfer efficiency. The research was conducted experimentally under controlled laboratory conditions using two orifice thickness variations, 1.5 mm and 9 mm, with different water and air flow rates, QL and QG. The findings reveal that increasing air flow rate (QG) correlates positively with higher KLa values for both orifice types; however, the thinner orifice consistently demonstrates superior KLa performance. This behavior is attributed to a steeper pressure gradient and stronger shear forces that promote finer bubble fragmentation and greater gas–liquid interfacial area. Overall, the thin-orifice MBG proved more efficient in enhancing aeration performance compared to the thick-orifice configuration
Trends in Interpretable and Lightweight Intrusion Detection Systems: A Bibliometric Analysis of Network Traffic Anomaly Detection
Full text linkThis study examines recent developments in interpretable and lightweight Intrusion Detection Systems (IDS) through a bibliometric analysis of 399 publications on network traffic anomaly detection from 2019 to 2025. Using a structured workflow comprising data collection, filtering, topic categorization, and visualization, the analysis reveals a significant increase in IDS-related publications, rising from fewer than 20 papers per year before 2019 to over 200 in 2025, reflecting growing interest in efficient and transparent security solutions. Topic categorization identifies IDS as the dominant research area, followed by Lightweight approaches, Anomaly Detection, IoT, and Explainability, with minimal contributions from other topics. Citation patterns confirm IDS and lightweight methods as the most influential themes. Journal analysis highlights Applied Sciences, Electronics, and IEEE Access as the leading publication venues. Overall, the findings indicate a clear shift toward IDS research emphasizing low computational cost, practical deployment, and model transparency, while also underscoring the ongoing need for unified benchmarks, realistic datasets, and evaluation frameworks to support broader adoption of interpretable and lightweight IDS technologies
Studi Eksperimen Pengaruh Bentuk Saluran Pada Corrugated Collector Terhadap Performa Pengering Tomat Tenaga Surya
Full text linkSolar Air Heaters (SAHs) are a strategic solution to mitigate post-harvest losses of horticultural commodities caused by inefficient conventional drying. This study aims to analyze the effect of serpentine absorber channel geometries integrated with Fresnel lenses on collector thermal performance and drying effectiveness. The experimental method involved testing three absorber channel cross-sections—triangular, rectangular, and trapezoidal—under outdoor conditions. The results indicate that the trapezoidal design offers superior thermal performance compared to other variations. The trapezoidal collector produced a maximum outlet air temperature of 88.5°C, a useful heat gain of 1,744.49 Watts, and a thermal efficiency of 50%. Application to tomato drying demonstrated that the system reduced drying time by half compared to open sun drying and significantly lowered product moisture content. This study concludes that integrating a trapezoidal absorber with a Fresnel lens effectively enhances the performance of active solar drying systems