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Agus Purwadi
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National Center for Sustainable Transportation Technology Gd. CRCS lt. 2, Institut Teknologi Bandung, Jl. Ganesha No.10, Lb. Siliwangi, Kecamatan Coblong, Kota Bandung, Jawa Barat 40132
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Kota bandung,
Jawa barat
INDONESIA
International Journal of Sustainable Transportation Technology
Published by Institut Teknologi Bandung
ISSN : 26557975     EISSN : 26204754     DOI : 10.31427/IJSTT
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Transportation
Aim IJSTT is an innovative open access journal for high-quality research in transportation and infrastructure system by focusing particularly on interdisciplinary and multidisciplinary research. IJSTT welcomes submissions from all disciplines, including physics, chemistry, engineering and related fields. The journal represents a community-oriented approach to communicating science driven by the needs of scientists and aims to facilitate the flow of knowledge between and beyond these communities. Scope This journal seeks articles related to the transportation and infrastructure technology. Its scope will include the following topics (but not limited to): 1. Transportation and infrastructure system 2. Electrical and combustion vehicle system 3. Transportation and infrastructure safety 4. Socio-economic and environmental impact of transportation policy 5. Manufacturing and supply chain process in automotive industries 6. Computational materials science and modelling 7. Design and construction for transportation system and such other topics as the Editors may deem appropriate. Articles need to make a significant contribution to the theoretical and or methodological literature on the subject and contain a strong knowledge component. IJSTT welcomes submissions of the following article types: Short communication paper (Letters), Technical Paper, Original Research Paper and Topical Reviews.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 45 Documents
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Module Stabilizing of Biocarbon Based Electrochemical Capacitor Syarif, Nirwan; Rohendi, Dedi; Sudarsono, Wulandari; Wong, Wai
http://dx.doi.org/10.31427/IJSTT.2019.2.1.5
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Abstract

One of the disadvantages of the electrochemical capacitor (EC) or supercapacitor compared with batteries is its low specific energy. It limits of EC to meet the energy needs of the electrical-electronic devices, such as electric cars. To overcome those limitations, it needs a serial circuit to increase the voltage range, and parallel circuits to increase the storage capacity. Practically, the module that built from 2-6 pieces of 2.5V EC cells will not feasible to make the module with the voltage of 5-15 V. It was found that the voltage of the EC cell could decreases to about 2.0 V, so that the capacitance of the module significantly reduced. This paper reports the basic methods that can be applied to overcome these problems by using a stabilizing or balancing component. The balancing components used in this study were a resistor, a Zener diode, and a Schottky diode. Each component was attached to every EC cell. The influence of the Zener and Schottky diode was observed as a component of a blocking diode. The results showed that the use of a 100-ohm resistor and Zener diode reduces voltage peaks while the use of blocking diode modules leads to increased discharge time. In general, there was no significant change in the charging time, both with and without the balancing and blocking component.
Evaluation of Motorcycle Energy Consumption in Urban Traffic Pance, Stepan; Piskac, Daniel; Bures, Adam; Voldrich, Antonin; Kovac, Maros; Budiman, Bentang
http://dx.doi.org/10.31427/IJSTT.2019.2.1.4
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Abstract

This paper aims to evaluate the energy consumption of motorcycle operating in urban traffic. Position, speed, and elevation in each time segment are collected by GPS - tracking data from the journey of motorcycle Honda Verza 150 in Bandung city. The distance, acceleration, and required tractive force for the motorcycle motion are then calculated. Furthermore, the energy consumption is investigated by modeling the motorcycle and calculating tractive force from the force equilibrium. For each time segment, engaged gear is then proposed for the best energy efficiency. The relationship among speed, required tractive force, and shifted gear according to time and distance are comprehensively discussed.
Calibration of Traffic Incident Simulation Models Using Field Data Rompis, Semuel; Habtemichael, Filmon
http://dx.doi.org/10.31427/IJSTT.2019.2.1.3
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Abstract

This study presents a methodology to calibrate a traffic incident simulation model, particularly in a freeway. The queue length was used as the objective of the simulation model calibration in this study. The simulation model was set up using Traffic Simulation Model PTV. VISSIM. Multiple incident durations were simulated, and the generated queue lengths were compared to the observed queue lengths. The observed queue lengths were estimated using the LWR model and shockwave speeds calculated using the field data. The results confirm that calibrated VISSIM incident model can signify the shockwave propagation speeds and queue length in the event of freeway incident. Such a model can be implemented as an instrument for setting up traffic management strategies to alleviate the incident’s impact.
Network Analysis of Intercity Bus Terminal and Inner-City Toll Road Development – The Case of Bandung City Ayuningtyas, Kardina; Frazila, Russ; Wibowo, Sony; Weningtyas, Widyarini; Farda, Muhammad
http://dx.doi.org/10.31427/IJSTT.2019.2.1.2
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Abstract

This paper explores the impact of Gedebage Terminal development to traffic performance in Bandung City, as well as the development of the inner-city toll road that connects eastern and western part of Bandung City. In addition, the study also analyzes the potential of minibus / public transport route that connects three terminals, namely Gedebage, Cicaheum and Leuwipanjang Terminal, in Bandung City. The study is carried out by using the 4-step modeling principle, by utilizing EMME/4 software. According to the analysis, the development of inner-city toll road will impact the city’s road performance significantly. On the other hand, the development of Gedebage Terminal as a terminal that serves intercity travel replacing Cicaheum Terminal will influence road network performance around the terminal in terms of traffic flow, vehicle speed and volume capacity ratio. The analysis results also suggest that the addition of public transport fleet with high capacity, such as bus, that connects the bus terminals is necessary to support public transport performance in Bandung City.
Optimal Power Flow with Considering Voltage Stability using Chaotic Firefly Algorithm Priyanto, Yun; Mudeng, Vicky; Robith, Muhammad
http://dx.doi.org/10.31427/IJSTT.2019.2.1.1
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Abstract

In transportation technology, the development of electric vehicle is growing rapidly. In the future, the availability of electrical power is crucial because every electric tool needs electrical power. Power plant must provide electrical power for all consumer include an electric vehicle. Sustainability of electrical power transmission and distribution must be considered as critical due to its high power consumption in the community. One of the problem to supply electrical power is how to keep the system’s voltage stability. Several variations on the load pattern and topological can lead to a substantial poor impact on the system. However, generation cost must be considered by utilities’ operator. This paper demonstrates a recently developed metaheuristic method called Chaotic Firefly Algorithm (CFA). Our simulation shows that this method may perform better than several well-known metaheuristic methods. Therefore, CFA may become a promising method to solve optimal power flow considering voltage stability cases.
A Review on Production of Hydrogen from Renewable Sources and Applications for Fuel Cell Vehicles Rohendi, Dedi; Rahmah, Dea; Yulianti, Dwi; Amelia, Icha; Sya'baniah, Nyimas; Syarif, Nirwan; Rachmat, Addy
http://dx.doi.org/10.31427/IJSTT.2018.1.2.5
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Abstract

Hydrogen gas is an energy carrier that has many advantages, including energy density for high mass and environmentally friendly. Hydrogen can be produced from various sources by numerous methods. Hydrogen production from renewable sources is interesting, due to the sustainable and inexpensive supply of the raw materials. Among the sources of renewable raw materials for hydrogen production are water and biomass with various production methods. It consists of the electrolysis of water with acidic and basic conditions, as well as thermochemical and biochemical biomass conversion.
Review of Switched Reluctance Motor Control for Acoustic Noise and Vibration Reduction Furqani, Jihad; Purwadi, Agus
http://dx.doi.org/10.31427/IJSTT.2018.1.2.4
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Abstract

Switched Reluctance Motor (SRM) is one of the candidates for substituting permanent magnet motor in Hybrid Electric Vehicle (HEV) application. Compared to permanent magnet motor, SRM is relatively low cost, robust, high reliability, and possible for high-temperature operation because of the absence of permanent magnet. One significant problem in SRM is the high acoustic noise and vibration. The vibration in SRM is caused by the radial forces acting at the stator teeth. Because of the saliency pole configuration in SRM, vibration is prominent. Many studies tried to reduce acoustic noise and vibration in SRM. In this paper, several controls for acoustic noise and vibration reduction are shown. The acoustic noise and vibration reduction from the experiment are also compared in each method.
Effect of Curing Current on Stiffness and Damping Properties of Magnetorheological Elastomers Hapipi, Norhiwani; Mazlan, Saiful; Aziz, Siti; Ubaidillah, Ubaidillah; Mohamad, Norzilawati; Yazid, Izyan; Choi, Seung-Bok
http://dx.doi.org/10.31427/IJSTT.2018.1.2.3
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Abstract

In this study, the viscoelastic effects of the magnetic field strength imposed for curing process on the stiffness and damping properties of magnetorheological elastomers (MREs) are experimentally investigated. In order to observe the effect, three different samples of MRE are fabricated by imposing curing current of 0.1 A, 0.3 A and 0.5 A which is equivalent to the magnetic field of 70 mT, 309 mT, and 345 mT, respectively. All samples consist of 30% silicone rubber and 70% carbonyl iron particles (CIPs) by weight percentages. After observing the morphological images via SEM, the dynamic performances of these samples, such as storage modulus and loss factor are evaluated and compared as a function of the magnetic field intensity or oscillation frequency. It is shown that the sample cured at 0.5A exhibits the highest storage modulus in the frequency domain. In addition, MR effects of three samples are identified, and it is found that the sample cured at 0.5A shows the highest absolute and relative MR effect.
Transportation System Development and Challenge in Jakarta Metropolitan Area, Indonesia Farda, Muhammad; Lubis, Harun
http://dx.doi.org/10.31427/IJSTT.2018.1.2.2
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Abstract

Jakarta Metropolitan Area has been facing problem in terms of congestion and its chain effect, namely time value loss, high fuel consumption, and high greenhouse gas emission. The problem is caused by many factors, namely high population, high use of the private vehicle, inadequate current public transport supply, urban sprawling, etc. The government, both City and National Government has been formulating and implementing a plan to develop sustainable transportation that serves the citizen of Jakarta Metropolitan Area. This included the operation of Jakarta Bus Rapid Transit, KRL Commuter Line and Jakarta Mass Rapid Transit. In the near future, both inner city and metropolitan light rapid transit will also operate in this area. This paper reviews the development and challenge of the transportation system in Jakarta Metropolitan Area and proposes a recommendation to optimize the current transport system. In general, there are three components that should be considered to achieve sustainable transportation. Those components are i) strong transport authority, ii) integrated master plan, iii) Sustainable Resources, Funding, and Financing.
Train Localization using Unscented Kalman Filter–Based Sensor Fusion Faruqi, Ismail; Waluya, Muhammad; Nazaruddin, Yul; Tamba, Tua
http://dx.doi.org/10.31427/IJSTT.2018.1.2.1
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Abstract

This paper presents an application of sensor fusion methods based on Unscented Kalman filter (UKF) technique for solving train localization problem in rail systems. The paper first reports the development of a laboratory-scale rail system simulator which is equipped with various onboard and wayside sensors that are used to detect and locate the train vehicle movements in the rail track. Due to the low precision measurement data obtained by each individual sensor, a sensor fusion method based on the UKF technique is implemented to fuse the measurement data from several sensors. Experimental results which demonstrate the effectiveness of the proposed UKF-based sensor fusion method for solving the train localization problem is also reported.

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