scholarly journals PENGARUH BAHAN TAMBAH RD260, E7016, ER705-6 PADA PENGELASAN OXY- ACETYLENE TERHADAP KEKUATAN TARIK PADA PLAT BORDES TIPE ST-37

KOMPUTEK ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 22
Author(s):  
Didik Setiawan ◽  
Wawan Trisnadi Putra ◽  
Nanang Suffiandi Ahmad
Keyword(s):  
Steering System ◽  
Transmission System ◽  
Test Results ◽  
Turning Angle ◽  
Research Technology ◽  
Braking System ◽  
Test Engine ◽  
A Chain ◽  
Electric Braking ◽  
Concept Type

This study aims to test the performance of the steering system, transmission, and electric braking system of the Urban Concept Warek V.1.1 type. The basic assumption of electricity is designed with the Urban Concept type (four vehicles like the current car) which is adjusted to the regulations for the Energy Saving Petite Contest (KMHE), which is held by the Indonesian government through the Ministry of Research, Technology and Higher Education. In the steering system design using the Ackerman type steering system, the transmission system uses a chain deive differential while the braking system uses hideelik discs. In the test results, the steering system has a maximum turning angle of 45 ° with a radius of less than 6 meters, for the transmission system in the test engine rotation speed (n,) is 589,867 rpm and electric meter rotation is 642.6 rpm with average speed - Average. 53 km / hour. The amount of deceleration of the braking system is 4.901 and 1.47 s for the braking time.

Robust Integrated Design for Vehicle Chassis Based on Uncertainties

2014 ◽  
Vol 644-650 ◽  
pp. 29-32
Author(s):  
Lei Zhang ◽  
Jie Xuan Lou ◽  
En Guo Dong
Keyword(s):  
Integrated Design ◽  
Steering System ◽  
Front Wheel ◽  
Vehicle Performance ◽  
Turning Angle ◽  
Braking System ◽  
Steering Mechanism ◽  
Steering Torque ◽  
Vehicle Chassis ◽  
Noise Factors

In order to improve overall vehicle performance and decrease movement deviation caused by uncertainties from automobile chassis, a robust vehicle chassis model is built with steering system, suspension system and braking system. In the model, the length of the steering trapezoid arm, the bottom angle of trapezoid mechanism, inclination angle, caster, camber and toe-in are defined as controllable variables, and load, driving force, steering torque are defined as noise factors. The optimum objectives include the maximum turning angle error of steering mechanism, the maximum braking sideslip and the maximum swing angle of front wheel on bumpy road. Taguchi method is applied to solve the robust result for automobile chassis model. Compared that the variances of objective values are decreased with the same noise factors and the robustness of sub-systems of chassis is improved.

scholarly journals Car braking effectiveness after adaptation for drivers with motor dysfunctions

2021 ◽  
Vol 11 (1) ◽  
pp. 617-623
Author(s):  
Adam Sowiński ◽  
Tomasz Szczepański ◽  
Grzegorz Koralewski
Keyword(s):  
Efficiency Index ◽  
Mathematical Function ◽  
Test Results ◽  
Braking Performance ◽  
Braking System ◽  
System Adaptation ◽  
Parametric Description ◽  
Limited Power ◽  
Braking Force ◽  
Selection Of

Abstract This article presents the results of measurements of the braking efficiency of vehicles adapted to be operated by drivers with motor dysfunctions. In such cars, the braking system is extended with an adaptive device that allows braking with the upper limb. This device applies pressure to the original brake in the car. The braking force and thus its efficiency depend on the mechanical ratio in the adapting device. In addition, braking performance depends on the sensitivity of the car’s original braking system and the maximum force that a disabled person can exert on the handbrake lever. Such a person may have limited power in the upper limbs. The force exerted by the driver can also be influenced by the position of the driver’s seat in relation to the handbrake lever. This article describes the research aimed at understanding the influence of the above-mentioned factors on the car braking performance. As a part of the analysis of the test results, a mathematical function was proposed that allows a parametric description of the braking efficiency index on the basis of data on the braking system, adaptation device, driver’s motor limitations, and the position of the driver’s seat. The information presented in this article can be used for the preliminary selection of adaptive devices to the needs of a given driver with a disability and to the vehicle construction.

scholarly journals Development and Testing of a Collision Avoidance Braking System for an Autonomous Vehicle

2019 ◽  
Vol 8 (12) ◽  
pp. 703-709
Keyword(s):  
Autonomous Vehicle ◽  
Test Results ◽  
Correct Operation ◽  
Braking Performance ◽  
System Parameters ◽  
Emergency Braking ◽  
Braking System ◽  
Good Consistency ◽  
Main Development ◽  
Outdoor Experiments

The article describes the main development and testing aspects of an emergency braking function for an autonomous vehicle. The purpose of this function is to prevent the vehicle from collisions with obstacles, either stationary or moving. An algorithm is proposed to calculate deceleration for the automated braking, which takes into account the distance to the obstacle and velocities of both the vehicle and the obstacle. In addition, the algorithm adapts to deviations from the required deceleration, which are inevitable in the real-world practice due to external and internal disturbances and unaccounted dynamics of the vehicle and its systems. The algorithm was implemented as a part of the vehicle’s mathematical model. Simulations were conducted, which allowed to verify algorithm’s operability and tentatively select the system parameters providing satisfactory braking performance of the vehicle. The braking function elaborated by means of modeling then was connected to the solenoid braking controller of the experimental autonomous vehicle using a real-time prototyping technology. In order to estimate operability and calibrate parameters of the function, outdoor experiments were conducted at a test track. A good consistency was observed between the test results and simulation results. The test results have proven correct operation of the emergency braking function, acceptable braking performance of the vehicle provided by this function, and its capability of preventing collisions.

Research on Accurate Modeling and Control for Pneumatic Electric Braking System of Commercial Vehicle Based on Multi-Dynamic Parameters Measurement

2020 ◽  
Author(s):  
Yongtao Zhao ◽  
Yiyong Yang ◽  
Xiuheng Wu ◽  
Xingjun Tao
Keyword(s):  
Dynamic Response ◽  
Real Time ◽  
Predictive Control ◽  
Control Algorithm ◽  
Control Algorithms ◽  
Dynamic Parameters ◽  
Braking System ◽  
Control Scheme ◽  
Braking Force ◽  
Electric Braking

Abstract Accurate pressure control and fast dynamic response are vital to the pneumatic electric braking system (PEBS) for that commercial vehicles require higher regulation precision of braking force on four wheels when braking force distribution is carried out under some conditions. Due to the lagging information acquisition, most feedback-based control algorithms are difficult to further improve the dynamic response of PEBS. Meanwhile, feedforward-based control algorithms like predictive control perform well in improving dynamic performance. but because of the large amount of computation and complexity of this kind of control algorithm, it cannot be applied in real-time on single-chip microcomputer, and it is still in the stage of theoretical research at present. To address this issue and for the sake of engineering reliability, this article presents a logic threshold control scheme combining analogous model predictive control (AMPC) and proportional control. In addition, an experimental device for real-time measuring PEBS multi-dynamic parameters is built. After correcting the key parameters, the precise model is determined and the influence of switching solenoid valve on its dynamic response characteristics is studied. For the control scheme, numerical and physical validation are executed to demonstrate the feasibility of the strategy and for the performance of the controller design. The experimental results show that the dynamic model of PEBS can accurately reflect its pressure characteristics. Furthermore, under different air source pressures, the designed controller can stably control the pressure output of PEBS and ensure that the error is within 8KPa. Compared with the traditional control algorithm, the rapidity is improved by 32.5%.

The Application of Optimising Control to an Hydraulic Drive

1973 ◽  
Vol 6 (2) ◽  
pp. 75-86
Author(s):  
G K Steel
Keyword(s):  
Control System ◽  
Hydraulic Drive ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Periodic Perturbation ◽  
Control Action ◽  
Test Results ◽  
Extremum Point ◽  
Fundamental Limitations ◽  
Action Analysis

An extremum control system has been designed to maximise the transmission efficiency of an hydraulic drive. The system is of the type which use a periodic perturbation of the control signal to generate the control action. Analysis of the system shows that an optimum choice of parameters may be made to maximise the rate of tracking of a moving extremum point. A system designed on these principles has been applied to a typical transmission system and test results are given. Some fundamental limitations of the performance of this type of control system are revealed.

scholarly journals A new electric braking system with energy regeneration for a BLDC motor driven electric vehicle

2018 ◽  
Vol 21 (4) ◽  
pp. 704-713 ◽  
Author(s):  
A. Joseph Godfrey ◽  
V. Sankaranarayanan
Keyword(s):  
Electric Vehicle ◽  
Bldc Motor ◽  
Energy Regeneration ◽  
Braking System ◽  
Electric Braking

Design, testing and analysis of a novel automotive magnetorheological braking system

2016 ◽  
Vol 231 (10) ◽  
pp. 1402-1413 ◽  
Author(s):  
Liangyao Yu ◽  
Liangxu Ma ◽  
Jian Song
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Reaction Times ◽  
Test Results ◽  
Element Analysis ◽  
Braking Performance ◽  
Braking System ◽  
Magnetic Circuits ◽  
Torque Capacity ◽  
Intensity Magnetic Field

This paper presents a new approach to the design, testing and analysis of a magnetorheological brake which uses a multi-path magnetic circuit to satisfy the braking demand of vehicles. In contrast with a general braking system, an automotive brake exhibits an outstanding performance for high torques and long reaction times. We use a proposed power-law model and finite element analysis to obtain the magnetorheological braking performance for a high shear rate and a high-intensity magnetic field. Finite element analysis with different structures is adopted to determine the parameters of the magnetorheological braking and the layout of the magnetic circuits. An integrated prototype is also fabricated and tested. The test results show that the brake torque is relatively high, and the torque can be accurately controlled by the input current. The reaction time is less than 100 ms. We also analyse the experimental results and use these as the basis for fabricating a full-sized prototype. The full-sized prototype generally exhibits a high torque capacity and a fast dynamic response, thereby validating the feasible application of magnetorheological fluids in automotive braking.

Field Test Results of the ATSC VSB Transmission System

SMPTE Journal ◽  
1997 ◽  
Vol 106 (9) ◽  
pp. 601-610 ◽  
Author(s):  
Gary Sgrignoli
Keyword(s):  
Field Test ◽  
Transmission System ◽  
Test Results
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