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Willy artha wirawan
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INDONESIA
Journal of Railway Transportation and Technology
Published by Politeknik Perkeretaapian Indonesia Madiun
ISSN : 28300491     EISSN : 28306880     DOI : https://doi.org/10.37367/jrtt.v1i1
Core Subject : Economy, Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The journal publishes original papers that cover but are not limited to, the following topics, Rolling Stock, Infrastructure, Energy and Environment, Signaling and communication, Operations, Strategies and Economics.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 51 Documents
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Analysis of Optimum Speed of ROLA Transportation with Flat Cars (GD 400910) on the Minimum Curve of the PPI Madiun Track Using Universal Mechanism Software Dadang Sanjaya Atmaja; Mohamad Imron Mustajib; Dimas Adi Perwira; Ilham Satrio Utomo; Henry Widya Prasetya; Destika Riski Putrihastiaji; Izza Anwer
Journal of Railway Transportation and Technology Vol. 5 No. 1 (2026): March
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i1.70

Abstract

An innovative solution for low-emission and environmentally friendly freight transport is the Rollende Landstraße (ROLA) train. Research at the Indonesian Railway Polytechnic (PPI) in Madiun conducted dynamic simulations to analyze safe operating speeds when crossing minimum curved tracks with a radius of 42 meters to prevent derailment. The simulation results show that the optimal speed limit for ROLA transport is 14 km/h for fully loaded trucks, 17 km/h for half-loaded trucks, and 19 km/h for unloaded trucks. This speed must be maintained constantly when passing through curves to ensure safety and comfort.
Implementation of CC-CV Battery Charging Method with Temperature Control for Level Crossings Yuli Prasetyo; Santi Triwijaya; Andri Pradipta; Akhwan; Aggie Brenda Vernandez; Akhsay Chandra Dewanta
Journal of Railway Transportation and Technology Vol. 5 No. 1 (2026): March
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i1.80

Abstract

Level crossings are critical for ensuring the safety of long-distance railway operations. To maintain the reliability of these at-grade crossings, their power supply systems are equipped with lead-acid batteries. This study focuses on the battery charging system. A known effect of battery charging is temperature rise due to charge current flow. The Constant Current-Constant Voltage (CC-CV) method is proposed in this research to address the issue of prolonged charging time while monitoring temperature to preserve battery health. Battery charging tests were conducted by comparing the CC-CV and Switch Mode Power Supply (SMPS) methods, starting from the minimum battery voltage (11.7 V) until the voltage set point was reached. The results show that the SMPS method required 5 hours with an average charging temperature of 34.0°C. In contrast, the CC-CV method required only 2.1 hours with an average temperature of 35.4°C. Therefore, the CC-CV method can significantly accelerate the charging time while ensuring the temperature remains within the specified maximum limit. This shorter charging duration is expected to enhance the reliability and prevent service disruptions at level crossings.
The Effect of Adding Corn Cob Inhibitor to Primer Paint as a Corrosion Retardant On Train Roofs (Mild Steel SS 400) Akbar Zulkarnain; Edi Nyoto Setyo Marsusiadi; Achmad Sholih Zidni; Dadang Sanjaya Atmaja; Willy Artha Wirawan
Journal of Railway Transportation and Technology Vol. 5 No. 1 (2026): March
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i1.84

Abstract

Corrosion is one of the main problems that can reduce the quality and service life of steel materials in the railway industry, especially on train roofs made of SS400 mild steel. This study aims to examine the effectiveness of adding natural inhibitors from corn cob ash to epoxy primer paint in inhibiting the rate of corrosion and increasing the adhesive strength of the paint. The inhibitor was made through a process of extracting silica from corn cob ash and mixing it into the primer paint at various concentrations. Fourier Transform Infra Red (FTIR) testing was used to identify the silica content in the inhibitor, while testing was carried out on the adhesive strength using an adhesion tester and the corrosion rate using the weight loss test method in HNO₃ solution. The results showed that the addition of corn cob ash inhibitor formed a protective layer on the metal surface, improved paint adhesion, and significantly reduced the corrosion rate. This study demonstrates that the use of agricultural waste such as corn cobs as a natural inhibitor is an innovative, economical, and environmentally friendly solution for controlling corrosion in steel materials in the railway industry.
Feasibility Evaluation of a Microcontroller-Based SCADA Prototype as an Operational Traction Substation Monitoring System Andri Pradipta; Amin Suharjono; Santi Triwijaya; Sunardi; Akhwan; Teguh Arifianto; Fadli Rozaq
Journal of Railway Transportation and Technology Vol. 5 No. 1 (2026): March
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i1.95

Abstract

This study evaluates the feasibility of a microcontroller-based Supervisory Control and Data Acquisition (SCADA) prototype for railway traction substation monitoring. A quantitative evaluative approach is employed using experimental data, focusing on reliability, response time, accuracy, and communication performance. The system integrates Arduino-based controllers, electrical sensors, TCP/IP communication, and a computer-based Human Machine Interface (HMI). Results show that the system achieves an operational success rate above 90% with an average response time below 2 seconds, indicating adequate performance for basic monitoring and control functions. However, compared to industrial SCADA standards, the system exhibits limitations in reliability, security, and scalability. Therefore, the prototype is classified as having limited feasibility, suitable for educational and simulation purposes but not for direct operational deployment. This study provides a structured evaluation framework and highlights key gaps for future development of more robust SCADA systems. This study contributes by introducing a quantitative feasibility evaluation framework for low-cost SCADA systems in railway applications.
A Study on the Operational Planning of the Surabaya Regional Railway Line Phase 1A Anung Kusuma; Nanda Ahda Imron; Arinda Leliana
Journal of Railway Transportation and Technology Vol. 5 No. 2 (2026): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i2.65

Abstract

The city of Surabaya faces increasing traffic congestion due to the growth of motorized vehicles. To address this issue, the government has planned the Surabaya Regional Railway Line (SRRL) Phase 1A. This study aims to design its operational pattern using a descriptive quantitative case study approach based on secondary data from the 2022 SRRL Feasibility Study, PT INKA, and the GAPEKA 2025. The analysis includes travel demand estimation, travel time calculation, and timetable development using jTrainGraph software. The results show that 12 daily trips using one 4-car KFW EMU trainset are sufficient to serve 11,734 passengers per day. The implementation of the double- track system significantly improves operational efficiency and timetable flexibility. Compared with the previous single-track operation, the line capacity is estimated to increase by approximately 100%, allowing simultaneous bidirectional train operations, reducing train crossing constraints, and improving service reliability.
Effect of Tool Pin Diameter on the Tensile Strength of Friction Stir Welded AA6061 Joints: Implications for Railway Carbodies Henry Widya Prasetya; Dadang Sanjaya Atmaja; I Made Agus Putrawan; Dimas Adi Perwira; Ilham Satrio Utomo; Moch Aziz Kurniawan
Journal of Railway Transportation and Technology Vol. 5 No. 2 (2026): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i2.99

Abstract

Friction stir welding (FSW) is a solid-state joining process that is increasingly used to fabricate aluminum railway carbodies. This study examined the effect of tool pin diameter on the tensile properties of FSW joints in 6 mm thick AA6061-T6 aluminum plates. High-speed steel tools with a 13 mm flat shoulder and straight cylindrical pins of 3, 4, and 5 mm diameter were fabricated by turning, and butt joints were welded on a conventional milling machine at a rotational speed of 1130 rpm, a traverse speed of 20 mm/min, and a tilt angle of 3°. Three joints were produced for each pin diameter (n = 3), and one transverse tensile specimen was tested from each joint. Results are reported as mean ± standard deviation and were analyzed using one-way ANOVA, the Kruskal–Wallis test, and Spearman’s rank correlation. The mean tensile strength decreased from 210.06 ± 5.87 MPa with the 3 mm pin to 190.96 ± 26.57 MPa and 146.36 ± 62.26 MPa with the 4 and 5 mm pins, respectively, while the scatter increased with pin diameter. Owing to the small sample size and large scatter, the differences among group means were not statistically significant (p = 0.206); however, pin diameter was negatively correlated with tensile strength (ρ = −0.74, p = 0.023). Visual inspection revealed less weld flash with the 3 mm pin, consistent with the smaller volume of material displaced by the pin. Within the tested range, the 3 mm pin provided the highest and most consistent tensile strength.
Integration of Renewable Energy and Hybrid Power System for Sustainable Transportation: A Vessel-to-Grid Approach Natriya Faisal Rachman; Sonhaji; Frenki Imanto; Jaka Septian Kustanto; Muhammad Taufiq Hidayat; Muhammad Razka
Journal of Railway Transportation and Technology Vol. 5 No. 2 (2026): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i2.102

Abstract

Sustainable maritime transportation requires electrical systems that are reliable, energy-efficient, and capable of integrating cleaner energy sources. This study develops and evaluates a small-scale hybrid power prototype that combines a 50 Wp photovoltaic (PV) source as the renewable-energy component with a mini steam power source as a complementary generator, using an ESP32 microcontroller, INA219 sensors, MPPT control, a buck-boost converter, and relay-based automatic switching. The experimental program included static component verification and dynamic tests under changing solar irradiance, steam pressure, source-transfer conditions, smartphone monitoring, and 180-minute battery-charging cycles. The PV source produced 11.1–19.7 V and 0.8–2.6 A depending on weather conditions, while the mini steam source became stable from approximately 20 psi and produced 23.3–24.5 V and 2.2–2.5 A between 20 and 50 psi. Automatic source switching occurred in approximately 0.2 s in all five trials. Both charging paths raised battery voltage to 12.8 V at 90 min, after which charging was automatically disconnected. These results show that renewable-energy utilization can be strengthened by hybrid-source coordination, real-time monitoring, and energy storage to support continuity of power for maritime transportation. From a Vessel-to-Grid (V2G) perspective, the prototype demonstrates enabling functions at the onboard energy-management level, but bidirectional power export to an external grid was not tested and remains a subject for further development. .
Operational Factors, Accident Characteristics, and Severity of Railway Accidents in Indonesia Safrudin Kurniawan; Nanda Ahda Imron; Andri Pradipta
Journal of Railway Transportation and Technology Vol. 4 No. 2 (2025): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v4i2.104

Abstract

Railway accidents remain a persistent transportation-safety challenge in Indonesia, yet quantitative evidence linking operational factors to accident characteristics and severity is limited. This study analyzes 92 railway-accident investigation reports published by the National Transportation Safety Committee (KNKT) for 2007–2024, constituting a census of all publicly accessible KNKT railway reports meeting the inclusion criteria at the time of data collection. Chi-square tests of independence and Cramér's V examined associations between three operational factors — human, infrastructure, and rolling stock — and accident type, with analytic samples ranging from N=61 to N=72 depending on data completeness for each factor. An Equivalent Property Damage Only (EPDO) severity score (N=68, complete-case) was compared across accident types (Kruskal-Wallis) and operational factors (Mann-Whitney U). Infrastructure factors showed a strong association with accident type (χ²=26.263, df=3, p<0.0001; Monte Carlo p<0.0001; Cramér's V=0.604), and human factors a moderate-to-strong association (χ²=12.273, df=3, p=0.0065; Monte Carlo p=0.0032; V=0.449); the rolling-stock association was not significant under the primary coding (p=0.074) but reached significance in a sensitivity analysis (p=0.033). Severity differed significantly across accident types (H=20.812, df=3, p=0.0001, ε²=0.278), with train collisions showing the highest severity, significantly higher than derailments and operational disruptions in post-hoc comparisons. No statistically significant bivariate association was found between the three operational factors and severity (all p>0.05); given the modest sample sizes involved, this is interpreted as inconclusive rather than confirmatory evidence of no relationship. The findings suggest operational factors relate more strongly to the mechanism by which an accident occurs than to its resulting severity, with cautious implications for infrastructure-focused safety prioritization, interpreted in light of the study's observational design and data limitations
Root Cause and Risk-Based Analysis of Excessive Smoke Emissions from CC206 Diesel Locomotives: An Exploratory Mixed-Methods Study Dadang Sanjaya Atmaja; Henry Widya Prasetya; Putra Tata Insan Nur Razzaq; Abdallah A. A. Lhwaint; Azaz Ramang Pambudi
Journal of Railway Transportation and Technology Vol. 5 No. 2 (2026): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i2.105

Abstract

Excessive smoke from diesel locomotives signals incomplete combustion and degrades engine performance and air quality. This exploratory mixed-methods study examined factors associated with smoke level in CC206 locomotives running B40 biodiesel at a depot in Yogyakarta, Indonesia, using records from January to June 2026, and ranked maintenance risks. Twenty-four fault-history records from 21 locomotives (injector age, fuel pressure, combustion chamber temperature, visually rated smoke level) were analyzed with ordinal logistic regression and separation-robust sensitivity analyses; technician interviews were analyzed with content analysis, root cause analysis (RCA), and failure mode and effect analysis (FMEA). Combustion chamber temperature was associated with smoke level (B = 0.069, p = .022), but every level-9 record exceeded 740 °C and every other record was at or below 640 °C, so the estimate is unstable and implies neither a gradient nor causation. Injector age and fuel pressure showed no detectable association. FMEA ranked injector damage (RPN = 360), non-optimal maintenance scheduling (280), and clogged fuel filters (210) highest. The findings are hypothesis-generating and require verification with larger, instrumented data that include normally operating locomotives.
Structural Reengineering of the TB1014 Bogie Bolster with Air Spring Secondary Suspension Using the Finite Element Method Dimas Said Shodiqul Rahmad; Ilham Satrio Utomo; Dadang Sanjaya Atmaja; Dimas Adi Perwira; Fadli Rozaq; Alfi Tranggono Agus Salim
Journal of Railway Transportation and Technology Vol. 5 No. 2 (2026): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i2.119

Abstract

The bogie bolster is a critical component that transfers vertical and lateral loads between the carbody and the bogie frame. This study evaluated the structural safety of a reengineered TB1014 bogie bolster in which the coil-spring secondary suspension was replaced with an air spring, and compared it with the original coil-spring bolster under identical conditions. A three-dimensional finite element model, built in SolidWorks and analyzed in Ansys Workbench 2024, was subjected to the static overload cases of UIC Code 515-4, with the vertical overload applied at the center pivot and side bearers simultaneously as a conservative envelope. The model was verified through a mesh-convergence study and reaction-force equilibrium; it was not physically validated. Under vertical loading, the air-spring bolster produced a maximum von Mises stress of 161.56 MPa and a deflection of 0.699 mm, versus 167.08 MPa and 1.030 mm for the coil-spring design. Under combined transverse-and-vertical loading, the values were 142.56 MPa and 0.659 mm versus 168.06 MPa and 1.032 mm. Both designs remained below the 245 MPa yield strength of SS400, with factors of safety of 1.52–1.72 and 1.46–1.47, respectively. Within a linear static analysis, the reengineered bolster satisfies the static strength requirement with a higher margin.

Page 5 of 6 | Total Record : 51

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