Danardono A. Sumarsono - Academia.edu (original) (raw)

Papers by Danardono A. Sumarsono

Poros: Jurnal Teknik Mesin dan Teknologi Manufaktur, Aug 1, 2017

A residential dump transport to a temporary garbage disposal medium using a human-powered dump ca... more A residential dump transport to a temporary garbage disposal medium using a human-powered dump cart is not humane. An electrical-powered propulsion system can be one of the eco-friendly system which can be implemented to the cart, thus substitutes the human's role to do so. This propulsion is analyzed by using vehicle dynamic analysis. Vehicle dynamic analysis which is conducted, discuss tractive effort which overcomes resistances during vehicle's movement and accelerates the vehicle, and specification of drive train, used to drive it. Based on analytical result, it is obtained an electric dump cart model which can move at a 25 km/h maximum velocity, 20° maximum inclination while it is empty loaded, and 10° maximum inclination while it is fully loaded.

POROS, 2017

Segway is a personal vehicle with a battery power source which is driven by an electric motor. In... more Segway is a personal vehicle with a battery power source which is driven by an electric motor. In designing the Segway, powertrain system design includes power, resources, transmission, steering, braking system and final drives. In the design and results of field tests performed, it was shown that the powertrain system segway is very good.

Nucleation and Atmospheric Aerosols, 2023

International Journal of Automotive and Mechanical Engineering, 2022

Crashworthiness is the ability to protect its occupant by absorbing the energy of impact during a... more Crashworthiness is the ability to protect its occupant by absorbing the energy of impact during a collision. A crush initiator is one way to increase crashworthiness criteria at collision. The most widely applied crush initiator applications are holes, wall thickness reduction, grooves, notch, bead and corrugated. This study discussed making a functional model from the crashworthiness criteria which is known by CFE and SEA. Variable used variations of the crush initiator in the form of circular holes with different rotation angles and diameters. The rotation angle referred to in this study was 2 holes which are rotated based on the midpoint of the hole distance to the radial axis of the hole. The crush initiator was placed in a square column at each side with steel material. Besides, the wall thickness variable was added which can increase the energy absorption during a collision. The method used numerical simulation and experimental dynamic loading. The numerical simulation used th...

Recent in Engineering Science and Technology

The study comprises dynotest design and analysis to measure torque and horsepower. Basically, a d... more The study comprises dynotest design and analysis to measure torque and horsepower. Basically, a dynotest carried out by apply certain load to the axle of a combustion motor through the braking mechanism of its crankshaft. Due to the high price of a Dynotest unit in the market, it is relatively difficult for a developing institution to own it on their site. The study target to design a simple and good accurate Dynotest within a reasonable price. The study used a common standard method for design analysis which rely on function and structural approach. Functionally, Dynotest is designed to be used to an ouput of an electical motor. Loading on motor shaft was done by disc brake braking mechanism. Structurally, Dynotest was designed to use rollers. As a main component, its mounting construction is connected to a motor to generate electrical power. Power transmitted from the motor to Dynotest through a center joint shaft, torque measured by load cell while the rotation of shaft itself co...

Mechanical Engineering Research, Feb 1, 2021

Along with the development of electric vehicle in Indonesia, one of the effort from Universitas I... more Along with the development of electric vehicle in Indonesia, one of the effort from Universitas Indonesia is developing on electric car that converted from usual car. But, after it was converted from conventional car which named Makara Electric Vehicle 02 still need crosschecking on several aspects, especially on braking. The author will focus on the effect of center of gravity and total mass to the braking characteristics which is braking forces and stopping distance by doing weigh testing and after that data processing to the characteristics that needed. The author also explained data result and compared it to the same M1 vehicle type before it was converted. The result of the test showing that center of gravity MEV 02 start from 0,57-0,62 meter along increase in passengers, for braking force start from 4900-6200N along increase in passengers, and for stopping distance start from 2-18m for velocity on 20 km/h, 40 km/h, and 60km/hours. Transportation is one of the biggest sectors that contributes to pollution in cities area. This happens because of the exhaust gas produced by the vehicles contains dangerous gases that causes air pollution. Electric vehicle is the alternative mode of transportation that does not produce any exhaust gas at all, yet it will take a long time for the masses to adapt to this new source of energy for the vehicle, and that was when the idea came up to convert a conventional vehicle. Makara Electric Vehicle 02 is an electric vehicle conversion project, using Daihatsu Ayla as the base platform, the internal combustion engine is replaced with AC Induction Motor 7.5 kW, while all the rest of the driveline components remains the same to use the standard components. This research will test the vehicle performance using dynamometer, calculating the resistance force working on the vehicle, and the maximum road incline handled by the vehicle by calculating tractive effort produced by the vehicle. The result is that the vehicle produced maximum power of 12.08 HP, with maximum torque of 86.25 Nm at 750 RPM. With used of the dyno test it is measured that the maximum vehicle speed is 46 km/hour. The transmission mapped the powertrain RPM to work and the range of 1237-3759 RPM on first gear, 776-3527 RPM on second gear, 720-2624 RPM on third gear, 692-1989 on fourth gear, and 566-1626 RPM on fifth gear. The maximum road incline is 22 degree of slope. When the battery condition is not in a full state of charge, the performance of the motor dropped 29% form the maximum capabilities of the motor.

International Journal of Technology, 2021

Mekara Electric Vehicle 02 is a type of city car that converts conventional vehicles into electri... more Mekara Electric Vehicle 02 is a type of city car that converts conventional vehicles into electric vehicles at the Universitas Indonesia. The brake booster component system still uses a type of vacuum brake booster. The brake booster is a component in the brake system that reduces the force on the driver's pedal in the vehicle braking process. The vacuum brake booster requires a vacuum generated by the engine intake manifold. In an electric car, there is no vacuum in the intake manifold because the engine is changed by an electric motor. The use of a vacuum brake booster in electric cars requires an additional component of a vacuum pump. The use of a vacuum pump on a vehicle battery requires electricity consumption of 3.9 Watt hours. In this study, we aim to design a new electric brake booster mechanism as a replacement for the vacuum brake booster mechanism. We used our proposed method to design an electric brake booster component and make a prototype. The prototype was tested using a rig test simulation. The electric brake amplifier applies the magnetic force generated by the solenoid and pulls the lever bar connected to the brake master. The brake pedal that is stepped on by the driver activates the flow of electricity on the solenoid and activates a magnetic pull force so that the driver's force in pressing the brake pedal will be assisted by an electric brake booster mechanism. Electric brake boosters can reduce electricity consumption by 28.2%.

IOP Conference Series: Materials Science and Engineering, 2019

View the article online for updates and enhancements. You may also like The analysis of diagnosti... more View the article online for updates and enhancements. You may also like The analysis of diagnostics possibilities of the Dual-Drive electric power steering system using diagnostics scanner and computer method W Szczypiski-Sala and K Dobaj-The manufacturing method of the composite worm gear housing using the cold injection A Baier, K Herbus and P Ociepka-Simulation and application of the electric power steering system simulation platform based on Simulink Senqi Gao, Rui Sun, Ying Fu et al.

IOP Conference Series: Materials Science and Engineering, 2019

Universitas Indonesia has developed several electric vehicles, one of which is an electric bus. I... more Universitas Indonesia has developed several electric vehicles, one of which is an electric bus. In order to fulfill the local content of this vehicle, reverse engineering of the R260 ladder frame type chassis is carried out. In this paper, to fulfill the local content, we used material of the ladder frame is type SS400 from PT. Krakatau Steel. After the model was created successfully with finite element software, a dynamic analysis was carried out by taking the 5 lowest frequencies from the simulation results. Loading is carried out evenly over the two main beam ladder frames totaling 14, 200 kg. The support placed in the mounting position of the front and rear wheel leaf springs. The distance of the front overhang is 2380 mm, the wheelbase is 6000 mm, and the rear overhang is 3290 mm. The resulting approach is carried out assuming a three-beam and two-overhang beam model. The five lowest frequencies are 11, 798 Hz, 21, 009 Hz, 23, 876 Hz, 30.84 Hz, and 36, 473 Hz, respectively.

IOP Conference Series: Materials Science and Engineering, 2019

The purpose of the present study was to estimate the static strength of the frame structure devel... more The purpose of the present study was to estimate the static strength of the frame structure developed from the initial tilting three-wheeled electric bike design using the Finite Element Analysis (FEA) assisted by the Static SOLIDWORKS Simulation software with a configuration of two wheels located at the front and one wheel at the back position. The main consideration of structural strength was seen from the point of view of the distribution of static loads using three types of materials (6061-T6 aluminium, AISI 1020 Steel and CFRP). The minimum factor of safety resulting from the initial design simulation was estimated to be 1.84.

International Journal of Technology: IJ Tech, Oct 4, 2022

Electric vehicles' power requirement and cost analysis require consideration in terms of their us... more Electric vehicles' power requirement and cost analysis require consideration in terms of their usage load and mileage. It is due to the unique character of the charging energy compared to internal combustion vehicles. The motor capacity and mileage will affect the vehicle's weight, especially the battery. If the battery is excessively big, it will affect passenger space. In comparison, buses with diesel engines are generally designed for long distances and rough roads. If used in the city, with relatively gentle road types, the engine will tend to be over-specification. This research aims to design the bus power requirements according to road conditions. The method is theoretical and simulated with specific GPS data. In this case, the bus power is designed for the city's needs, with a case study of battery electric buses (BEBs) for the route of the city of Jakarta and its surroundings, namely Bogor, Depok, Tangerang, and Bekasi. In addition, an economic study will also be a part of this research. Bus companies need this study to decide on the procurement and use of an electric bus fleet. The simulation results show that the power and battery capacity of inner-city buses need not be as large as inter-city buses. A bus with a motor power rating of 100 kW and batteries with a total of 200 kWh is very appropriate to carry 85 passengers over a distance of 200 km on one charge. Moreover, with proper incentives from the government, the price of electric inner-city buses is very competitive. It has the advantage of having a service life of more than ten years.

THE 5TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (THE 5TH iTREC), 2021

THE 5TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (THE 5TH iTREC), 2021

Development of the MEV 02 UI brake model into a Solenoid Brake Booster system to support the conv... more Development of the MEV 02 UI brake model into a Solenoid Brake Booster system to support the converting program of conventional vehicles to electric vehicles

THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL AND TECHNOLOGY (ICAMT) 2021

This research was conducted related to the difference between the results of software simulations... more This research was conducted related to the difference between the results of software simulations and the results of testing on structures built using SM 570 and SM 490 materials. in the software simulation results, the resulting stress is below the allowable stress of the material, but in the test results, there is a stress value that is above the allowable stress value of the material. The test aims to determine the mechanical properties of the SM 490 and SM 570 materials which are expressed in terms of ultimate stress, yield stress, modulus of elasticity, and poison ratio. The equipment used is a strain gauge, data logger, and a 1000 KN tensile testing machine. The research method used is to make a tensile test specimen of 3 pcs each, then attach 2 strain gauges to the center of the specimen horizontally and vertically. The specimen that has been installed with a strain gauge then does a tensile test until it breaks. The value of strain and stress obtained from the tensile test is made a stress-strain graph and then the value range is taken in the elastic area until it is below 75% of the yielding material. From this value, is taken the difference between the maximum and minimum stress values is then divided by the difference between the maximum and minimum strain values. From the tests carried out, the modulus of elasticity for the SM 570 material is 171.6 Gpa and the modulus of elasticity for the SM 490 material is 182 GPa. This value is below the standard elastic modulus of SM 490 and SM 570 materials of 207 Gpa. The poison ratio value of 0.28 is also below the poison ratio value of the SM 490 and SM 570 material standards of 0.3. Many factors affect this value, including the standard specimen manufacturing process which is carried out using the laser cutting method.

IOP Conference Series: Materials Science and Engineering, 2020

Electric Tilting Tricycle is a three-wheeled vehicle that has tadpole configuration driven by two... more Electric Tilting Tricycle is a three-wheeled vehicle that has tadpole configuration driven by two sources of motion, that motion by a manual pedal and power from an electric motor. The three-wheeled vehicle has better stability and the tilting system improves ergonomics at curves. This research aims to design and analyze the strengths frame with three different materials using the Autodesk inventor software. By using the Stress Analysis feature that comes with the method of finite element analysis (FEA), we can know the result of von misses stress, displacement, strain, and safety factor. The main consideration of structural strength was seen from the distribution of static loads using three types of materials (Aluminium 6061, Steel Mild and CFRP). The minimum factor of safety resulting from the design simulation was estimated to be 1.83 using steel mild material.

F. Zainuri, D.A. Sumarsono, M. Adhitya, R. Siregar, S. Prasetya, G.Heryana, Nazaruddin, R.Subarka... more F. Zainuri, D.A. Sumarsono, M. Adhitya, R. Siregar, S. Prasetya, G.Heryana, Nazaruddin, R.Subarkah, Widiyatmoko Research Center for Advanced Vehicle (RCAVe), Universitas Indonesia, 16424, Indonesia Department of Mechanical Engineering State Polytechnic of Jakarta 16425, Indonesia Department of Mechanical Engineering STT Wastukancana , Indonesia Department of Mechanical Engineering Universitas Dharma Persada , Indonesia Department of Mechanical Engineering Universitas Riau, Indonesia;

International Journal of Emerging Trends in Engineering Research, 2020

A braking system is an essential value in a vehicle particularly for a safety precaution. The hig... more A braking system is an essential value in a vehicle particularly for a safety precaution. The higher number rate of traffic accidents mostly in Indonesia shows that the dominant cause of accidents is due to the human factor. The physical condition such as tired or sleepy during driving is the primary problem according to the survey. In order to assist a person when driving a vehicle, an artificial intelligence method is necessary to be integrated to ensure the safety of surrounding people inside and outside the vehicle. This study focuses on implementing the method of identifying object and distance to provide an indicator for braking action. Images from a stereo camera is processed by a neural network technique via a mini computer to classify as well as the distance of objects. Furthermore, selection of priorities are done to obtain the intensity of braking action. The result shows that process of classification and measurement requires period around 200 ms. Furthermore, braking action done by fuzzy controller subsystem shows that the intensity has smoother signal with the object distance variation compare to the direct method. Objects are firstly identified by the presence of a stereo camera, later on the decision of braking intensity is generated by two processing unit namely conventional and fuzzy unit. This is achieved by processing the data saved from the object detection using two system via MATLAB software. The object identification result, distance measurement and the period of object detection is presented. Moreover, the response of braking intensity using data is processed with both conventional and fuzzy unit systems are also presented. he implementation of this study is for the heavy vehicle such buses or trucks that requires higher safety during the journey.

RECENT PROGRESS ON: MECHANICAL, INFRASTRUCTURE AND INDUSTRIAL ENGINEERING: Proceedings of International Symposium on Advances in Mechanical Engineering (ISAME): Quality in Research 2019, 2020

Stair lift is transportation technology with electrical mechanical equipment to assist vertical m... more Stair lift is transportation technology with electrical mechanical equipment to assist vertical movements in buildings, and it is used specifically and individually by the elderly and people with disabilities [1]. This paper has two objectives. The first is to optimize the ability of the existing stair lift structure by developing lighter stair lift designs and materials without reducing the capability of the stair lift. The second is to design a braking system on the stair lift. The optimization of a stair lift structural design is needed to ensure that the strength of the stair lift structure complies with the requirements of ASME standard 18.1. The methodologies of this study are redesigning and conducting numerical simulations with the finite element to get the optimum result. Numerical simulations on the guide rails were carried out on A36 steel and 6063 T5 aluminum materials by comparing 30 o and 45 o stair lift inclinations. The maximum load is 270.4 kg. The distance of support is 1000 mm. From the simulation results, the 6063 T5 aluminum profile can be used as a material substitution for guide rails. The chains for driving links need to be strengthened by adding the dimensions of the chain or increasing the number of chains. The maximum temperature distribution on the disc brakes is 130.56 o C.

Transportation Research Interdisciplinary Perspectives

Poros: Jurnal Teknik Mesin dan Teknologi Manufaktur, Aug 1, 2017

A residential dump transport to a temporary garbage disposal medium using a human-powered dump ca... more A residential dump transport to a temporary garbage disposal medium using a human-powered dump cart is not humane. An electrical-powered propulsion system can be one of the eco-friendly system which can be implemented to the cart, thus substitutes the human's role to do so. This propulsion is analyzed by using vehicle dynamic analysis. Vehicle dynamic analysis which is conducted, discuss tractive effort which overcomes resistances during vehicle's movement and accelerates the vehicle, and specification of drive train, used to drive it. Based on analytical result, it is obtained an electric dump cart model which can move at a 25 km/h maximum velocity, 20° maximum inclination while it is empty loaded, and 10° maximum inclination while it is fully loaded.

POROS, 2017

Segway is a personal vehicle with a battery power source which is driven by an electric motor. In... more Segway is a personal vehicle with a battery power source which is driven by an electric motor. In designing the Segway, powertrain system design includes power, resources, transmission, steering, braking system and final drives. In the design and results of field tests performed, it was shown that the powertrain system segway is very good.

Nucleation and Atmospheric Aerosols, 2023

International Journal of Automotive and Mechanical Engineering, 2022

Crashworthiness is the ability to protect its occupant by absorbing the energy of impact during a... more Crashworthiness is the ability to protect its occupant by absorbing the energy of impact during a collision. A crush initiator is one way to increase crashworthiness criteria at collision. The most widely applied crush initiator applications are holes, wall thickness reduction, grooves, notch, bead and corrugated. This study discussed making a functional model from the crashworthiness criteria which is known by CFE and SEA. Variable used variations of the crush initiator in the form of circular holes with different rotation angles and diameters. The rotation angle referred to in this study was 2 holes which are rotated based on the midpoint of the hole distance to the radial axis of the hole. The crush initiator was placed in a square column at each side with steel material. Besides, the wall thickness variable was added which can increase the energy absorption during a collision. The method used numerical simulation and experimental dynamic loading. The numerical simulation used th...

Recent in Engineering Science and Technology

The study comprises dynotest design and analysis to measure torque and horsepower. Basically, a d... more The study comprises dynotest design and analysis to measure torque and horsepower. Basically, a dynotest carried out by apply certain load to the axle of a combustion motor through the braking mechanism of its crankshaft. Due to the high price of a Dynotest unit in the market, it is relatively difficult for a developing institution to own it on their site. The study target to design a simple and good accurate Dynotest within a reasonable price. The study used a common standard method for design analysis which rely on function and structural approach. Functionally, Dynotest is designed to be used to an ouput of an electical motor. Loading on motor shaft was done by disc brake braking mechanism. Structurally, Dynotest was designed to use rollers. As a main component, its mounting construction is connected to a motor to generate electrical power. Power transmitted from the motor to Dynotest through a center joint shaft, torque measured by load cell while the rotation of shaft itself co...

Mechanical Engineering Research, Feb 1, 2021

Along with the development of electric vehicle in Indonesia, one of the effort from Universitas I... more Along with the development of electric vehicle in Indonesia, one of the effort from Universitas Indonesia is developing on electric car that converted from usual car. But, after it was converted from conventional car which named Makara Electric Vehicle 02 still need crosschecking on several aspects, especially on braking. The author will focus on the effect of center of gravity and total mass to the braking characteristics which is braking forces and stopping distance by doing weigh testing and after that data processing to the characteristics that needed. The author also explained data result and compared it to the same M1 vehicle type before it was converted. The result of the test showing that center of gravity MEV 02 start from 0,57-0,62 meter along increase in passengers, for braking force start from 4900-6200N along increase in passengers, and for stopping distance start from 2-18m for velocity on 20 km/h, 40 km/h, and 60km/hours. Transportation is one of the biggest sectors that contributes to pollution in cities area. This happens because of the exhaust gas produced by the vehicles contains dangerous gases that causes air pollution. Electric vehicle is the alternative mode of transportation that does not produce any exhaust gas at all, yet it will take a long time for the masses to adapt to this new source of energy for the vehicle, and that was when the idea came up to convert a conventional vehicle. Makara Electric Vehicle 02 is an electric vehicle conversion project, using Daihatsu Ayla as the base platform, the internal combustion engine is replaced with AC Induction Motor 7.5 kW, while all the rest of the driveline components remains the same to use the standard components. This research will test the vehicle performance using dynamometer, calculating the resistance force working on the vehicle, and the maximum road incline handled by the vehicle by calculating tractive effort produced by the vehicle. The result is that the vehicle produced maximum power of 12.08 HP, with maximum torque of 86.25 Nm at 750 RPM. With used of the dyno test it is measured that the maximum vehicle speed is 46 km/hour. The transmission mapped the powertrain RPM to work and the range of 1237-3759 RPM on first gear, 776-3527 RPM on second gear, 720-2624 RPM on third gear, 692-1989 on fourth gear, and 566-1626 RPM on fifth gear. The maximum road incline is 22 degree of slope. When the battery condition is not in a full state of charge, the performance of the motor dropped 29% form the maximum capabilities of the motor.

International Journal of Technology, 2021

Mekara Electric Vehicle 02 is a type of city car that converts conventional vehicles into electri... more Mekara Electric Vehicle 02 is a type of city car that converts conventional vehicles into electric vehicles at the Universitas Indonesia. The brake booster component system still uses a type of vacuum brake booster. The brake booster is a component in the brake system that reduces the force on the driver's pedal in the vehicle braking process. The vacuum brake booster requires a vacuum generated by the engine intake manifold. In an electric car, there is no vacuum in the intake manifold because the engine is changed by an electric motor. The use of a vacuum brake booster in electric cars requires an additional component of a vacuum pump. The use of a vacuum pump on a vehicle battery requires electricity consumption of 3.9 Watt hours. In this study, we aim to design a new electric brake booster mechanism as a replacement for the vacuum brake booster mechanism. We used our proposed method to design an electric brake booster component and make a prototype. The prototype was tested using a rig test simulation. The electric brake amplifier applies the magnetic force generated by the solenoid and pulls the lever bar connected to the brake master. The brake pedal that is stepped on by the driver activates the flow of electricity on the solenoid and activates a magnetic pull force so that the driver's force in pressing the brake pedal will be assisted by an electric brake booster mechanism. Electric brake boosters can reduce electricity consumption by 28.2%.

IOP Conference Series: Materials Science and Engineering, 2019

View the article online for updates and enhancements. You may also like The analysis of diagnosti... more View the article online for updates and enhancements. You may also like The analysis of diagnostics possibilities of the Dual-Drive electric power steering system using diagnostics scanner and computer method W Szczypiski-Sala and K Dobaj-The manufacturing method of the composite worm gear housing using the cold injection A Baier, K Herbus and P Ociepka-Simulation and application of the electric power steering system simulation platform based on Simulink Senqi Gao, Rui Sun, Ying Fu et al.

IOP Conference Series: Materials Science and Engineering, 2019

Universitas Indonesia has developed several electric vehicles, one of which is an electric bus. I... more Universitas Indonesia has developed several electric vehicles, one of which is an electric bus. In order to fulfill the local content of this vehicle, reverse engineering of the R260 ladder frame type chassis is carried out. In this paper, to fulfill the local content, we used material of the ladder frame is type SS400 from PT. Krakatau Steel. After the model was created successfully with finite element software, a dynamic analysis was carried out by taking the 5 lowest frequencies from the simulation results. Loading is carried out evenly over the two main beam ladder frames totaling 14, 200 kg. The support placed in the mounting position of the front and rear wheel leaf springs. The distance of the front overhang is 2380 mm, the wheelbase is 6000 mm, and the rear overhang is 3290 mm. The resulting approach is carried out assuming a three-beam and two-overhang beam model. The five lowest frequencies are 11, 798 Hz, 21, 009 Hz, 23, 876 Hz, 30.84 Hz, and 36, 473 Hz, respectively.

IOP Conference Series: Materials Science and Engineering, 2019

The purpose of the present study was to estimate the static strength of the frame structure devel... more The purpose of the present study was to estimate the static strength of the frame structure developed from the initial tilting three-wheeled electric bike design using the Finite Element Analysis (FEA) assisted by the Static SOLIDWORKS Simulation software with a configuration of two wheels located at the front and one wheel at the back position. The main consideration of structural strength was seen from the point of view of the distribution of static loads using three types of materials (6061-T6 aluminium, AISI 1020 Steel and CFRP). The minimum factor of safety resulting from the initial design simulation was estimated to be 1.84.

International Journal of Technology: IJ Tech, Oct 4, 2022

Electric vehicles' power requirement and cost analysis require consideration in terms of their us... more Electric vehicles' power requirement and cost analysis require consideration in terms of their usage load and mileage. It is due to the unique character of the charging energy compared to internal combustion vehicles. The motor capacity and mileage will affect the vehicle's weight, especially the battery. If the battery is excessively big, it will affect passenger space. In comparison, buses with diesel engines are generally designed for long distances and rough roads. If used in the city, with relatively gentle road types, the engine will tend to be over-specification. This research aims to design the bus power requirements according to road conditions. The method is theoretical and simulated with specific GPS data. In this case, the bus power is designed for the city's needs, with a case study of battery electric buses (BEBs) for the route of the city of Jakarta and its surroundings, namely Bogor, Depok, Tangerang, and Bekasi. In addition, an economic study will also be a part of this research. Bus companies need this study to decide on the procurement and use of an electric bus fleet. The simulation results show that the power and battery capacity of inner-city buses need not be as large as inter-city buses. A bus with a motor power rating of 100 kW and batteries with a total of 200 kWh is very appropriate to carry 85 passengers over a distance of 200 km on one charge. Moreover, with proper incentives from the government, the price of electric inner-city buses is very competitive. It has the advantage of having a service life of more than ten years.

THE 5TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (THE 5TH iTREC), 2021

THE 5TH INTERNATIONAL TROPICAL RENEWABLE ENERGY CONFERENCE (THE 5TH iTREC), 2021

Development of the MEV 02 UI brake model into a Solenoid Brake Booster system to support the conv... more Development of the MEV 02 UI brake model into a Solenoid Brake Booster system to support the converting program of conventional vehicles to electric vehicles

THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL AND TECHNOLOGY (ICAMT) 2021

This research was conducted related to the difference between the results of software simulations... more This research was conducted related to the difference between the results of software simulations and the results of testing on structures built using SM 570 and SM 490 materials. in the software simulation results, the resulting stress is below the allowable stress of the material, but in the test results, there is a stress value that is above the allowable stress value of the material. The test aims to determine the mechanical properties of the SM 490 and SM 570 materials which are expressed in terms of ultimate stress, yield stress, modulus of elasticity, and poison ratio. The equipment used is a strain gauge, data logger, and a 1000 KN tensile testing machine. The research method used is to make a tensile test specimen of 3 pcs each, then attach 2 strain gauges to the center of the specimen horizontally and vertically. The specimen that has been installed with a strain gauge then does a tensile test until it breaks. The value of strain and stress obtained from the tensile test is made a stress-strain graph and then the value range is taken in the elastic area until it is below 75% of the yielding material. From this value, is taken the difference between the maximum and minimum stress values is then divided by the difference between the maximum and minimum strain values. From the tests carried out, the modulus of elasticity for the SM 570 material is 171.6 Gpa and the modulus of elasticity for the SM 490 material is 182 GPa. This value is below the standard elastic modulus of SM 490 and SM 570 materials of 207 Gpa. The poison ratio value of 0.28 is also below the poison ratio value of the SM 490 and SM 570 material standards of 0.3. Many factors affect this value, including the standard specimen manufacturing process which is carried out using the laser cutting method.

IOP Conference Series: Materials Science and Engineering, 2020

Electric Tilting Tricycle is a three-wheeled vehicle that has tadpole configuration driven by two... more Electric Tilting Tricycle is a three-wheeled vehicle that has tadpole configuration driven by two sources of motion, that motion by a manual pedal and power from an electric motor. The three-wheeled vehicle has better stability and the tilting system improves ergonomics at curves. This research aims to design and analyze the strengths frame with three different materials using the Autodesk inventor software. By using the Stress Analysis feature that comes with the method of finite element analysis (FEA), we can know the result of von misses stress, displacement, strain, and safety factor. The main consideration of structural strength was seen from the distribution of static loads using three types of materials (Aluminium 6061, Steel Mild and CFRP). The minimum factor of safety resulting from the design simulation was estimated to be 1.83 using steel mild material.

F. Zainuri, D.A. Sumarsono, M. Adhitya, R. Siregar, S. Prasetya, G.Heryana, Nazaruddin, R.Subarka... more F. Zainuri, D.A. Sumarsono, M. Adhitya, R. Siregar, S. Prasetya, G.Heryana, Nazaruddin, R.Subarkah, Widiyatmoko Research Center for Advanced Vehicle (RCAVe), Universitas Indonesia, 16424, Indonesia Department of Mechanical Engineering State Polytechnic of Jakarta 16425, Indonesia Department of Mechanical Engineering STT Wastukancana , Indonesia Department of Mechanical Engineering Universitas Dharma Persada , Indonesia Department of Mechanical Engineering Universitas Riau, Indonesia;

International Journal of Emerging Trends in Engineering Research, 2020

A braking system is an essential value in a vehicle particularly for a safety precaution. The hig... more A braking system is an essential value in a vehicle particularly for a safety precaution. The higher number rate of traffic accidents mostly in Indonesia shows that the dominant cause of accidents is due to the human factor. The physical condition such as tired or sleepy during driving is the primary problem according to the survey. In order to assist a person when driving a vehicle, an artificial intelligence method is necessary to be integrated to ensure the safety of surrounding people inside and outside the vehicle. This study focuses on implementing the method of identifying object and distance to provide an indicator for braking action. Images from a stereo camera is processed by a neural network technique via a mini computer to classify as well as the distance of objects. Furthermore, selection of priorities are done to obtain the intensity of braking action. The result shows that process of classification and measurement requires period around 200 ms. Furthermore, braking action done by fuzzy controller subsystem shows that the intensity has smoother signal with the object distance variation compare to the direct method. Objects are firstly identified by the presence of a stereo camera, later on the decision of braking intensity is generated by two processing unit namely conventional and fuzzy unit. This is achieved by processing the data saved from the object detection using two system via MATLAB software. The object identification result, distance measurement and the period of object detection is presented. Moreover, the response of braking intensity using data is processed with both conventional and fuzzy unit systems are also presented. he implementation of this study is for the heavy vehicle such buses or trucks that requires higher safety during the journey.

RECENT PROGRESS ON: MECHANICAL, INFRASTRUCTURE AND INDUSTRIAL ENGINEERING: Proceedings of International Symposium on Advances in Mechanical Engineering (ISAME): Quality in Research 2019, 2020

Stair lift is transportation technology with electrical mechanical equipment to assist vertical m... more Stair lift is transportation technology with electrical mechanical equipment to assist vertical movements in buildings, and it is used specifically and individually by the elderly and people with disabilities [1]. This paper has two objectives. The first is to optimize the ability of the existing stair lift structure by developing lighter stair lift designs and materials without reducing the capability of the stair lift. The second is to design a braking system on the stair lift. The optimization of a stair lift structural design is needed to ensure that the strength of the stair lift structure complies with the requirements of ASME standard 18.1. The methodologies of this study are redesigning and conducting numerical simulations with the finite element to get the optimum result. Numerical simulations on the guide rails were carried out on A36 steel and 6063 T5 aluminum materials by comparing 30 o and 45 o stair lift inclinations. The maximum load is 270.4 kg. The distance of support is 1000 mm. From the simulation results, the 6063 T5 aluminum profile can be used as a material substitution for guide rails. The chains for driving links need to be strengthened by adding the dimensions of the chain or increasing the number of chains. The maximum temperature distribution on the disc brakes is 130.56 o C.

Transportation Research Interdisciplinary Perspectives