scholarly journals Optimization of Vehicle Braking Distance Using a Fuzzy Controller

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 3022
Author(s):  
Peter Girovský ◽  
Jaroslava Žilková ◽  
Ján Kaňuch
Keyword(s):  
Fuzzy Controller ◽  
Medium Size ◽  
Vehicle Model ◽  
Matlab Simulink ◽  
Braking Performance ◽  
Braking System ◽  
Braking Distance ◽  
Critical Situations

The paper presents the study of an anti-lock braking system (ABS) that has been complemented by a fuzzy controller. The fuzzy controller was used to improve the braking performance of the vehicle, particularly in critical situations, for example, when braking a vehicle on wet road. The controller for the ABS was designed in the MATLAB/Simulink program. The designed controller was simulated on a medium-size vehicle model. During testing, three braking systems were simulated on the vehicle model. We compared the performance of a braking system without an ABS, a system with a threshold-based conventional ABS, and a braking system with the proposed ABS with a fuzzy controller. These three braking systems were simulation tested during braking the vehicle on a dry straight road and on a road with combined road adhesion. A maneuverability test was conducted, where the vehicle had to avoid an obstacle while braking. The results of each test are provided at the end of the paper.

Fuzzy Control of Automobile ECBS on Varying Pavement

2011 ◽  
Vol 383-390 ◽  
pp. 7338-7344
Author(s):  
Ren Yun Sun ◽  
Bo Wang ◽  
Yong Fu Zhan
Keyword(s):  
Fuzzy Control ◽  
Control Method ◽  
Fuzzy Controller ◽  
Threshold Value ◽  
Electronic Control ◽  
Braking Performance ◽  
Braking System ◽  
Braking Distance ◽  
Automobile Electronic ◽  
Better Than

The Fuzzy control method in an automobile Electronic Control Braking System (ECBS) on varying pavement is studied. According to the characteristics of an automobile ECBS which adapts to the varying pavement, the ECBS fuzzy control system is established. The ECBS fuzzy controller based on slip is designed. When the automobile is braking on uniform pavement and varying pavement, the computer simulation is fulfilled for the deceleration threshold value control and the slip fuzzy control of the automobile ECBS by using MATLAB/Simulink. The results show that the automobile ECBS using fuzzy control can obtain better fundamental braking performance on varying pavement, wheel locking doesn’t appear, both braking distance and braking time are short, the fluctuation of the wheel periphery velocity is little and smooth, its braking performance is obviously better than the deceleration threshold value control.

Non-Traditional Controllers: Composite ABS/TCS for Wheeled Vehicle

2013 ◽  
Vol 711 ◽  
pp. 491-494
Author(s):  
Ching Kuo Wang ◽  
Chang Hsin Chang
Keyword(s):  
Tracking Control ◽  
Fuzzy Controller ◽  
Viscous Friction ◽  
Lumped Mass ◽  
Braking System ◽  
Wheeled Vehicle ◽  
Nonlinear Features ◽  
Braking Distance ◽  
Rigid Body Motions ◽  
Wheeled Vehicles

Modern vehicle dynamics in its broadest sense encompasses all forms of vehicles. It aims to improve the riding comfort and the maneuverability for high-quality automobiles. This paper develops a sensor-based fuzzy controller (SFC) with a composite anti-lock braking system and tracking control system (ABS/TCS) to navigate escaping motions of wheeled vehicles under the assumption of Coulombs viscous friction and lumped-mass/rigid-body motions. The so-called escaping dynamics of wheeled vehicles occurs when the vehicle escapes from the constrained space during braking or cornering. Traditionally, such slippage phenomenon is usually ignored because of its high frequency and strong nonlinear features. The proposed SFC is designed to shorten braking distance under emergent circumstances and minimize cornering radius to improve maneuverability for wheeled vehicles. Finally, detailed simulations of wheeled vehicles with a composite ABS/TCS under the assumption of Coulombs viscous friction are used to justify the SFC algorithm.

Dynamic Modeling and Analysis of Tank Vehicle under Braking Situation

2013 ◽  
Vol 694-697 ◽  
pp. 176-180
Author(s):  
Ying Wan ◽  
Li Mai ◽  
Zhi Gen Nie
Keyword(s):  
Steady State ◽  
Dynamic Modeling ◽  
Transient State ◽  
Equivalent Model ◽  
Vehicle Model ◽  
Matlab Simulink ◽  
Modeling And Analysis ◽  
Braking Performance ◽  
Pitch Motion ◽  
Vehicle System

Considering the instability of the direction dynamics of tank vehicle system under braking maneuver, the longitudinal equivalent model of liquid was formulated with consideration of both the steady-state and the transient state dynamics of the liquid. The Matlab/simulink program of the liquid was built and was combined with the vehicle model in Trucksim software to simulate and analyze the motion of the liquid cargo centroid and its dynamical effects on the vehicle under braking maneuver. It is observed that the liquid cargo slosh motion in tank vehicles has significant influences on braking performance, pitch motion and perpendicular motion of the vehicle. The results of this paper have significant help for studies on dynamics of vehicle tankers under braking maneuver and ensurement of braking stability and security.

Research on BP Based Fuzzy-PID Controller for Anti-Lock Braking System

2013 ◽  
Vol 365-366 ◽  
pp. 401-406
Author(s):  
Yue Liu ◽  
Li Qiang Jin ◽  
Xin Lu Liang ◽  
Zhu An Zheng
Keyword(s):  
Pid Controller ◽  
Control Methods ◽  
Fuzzy Pid ◽  
Matlab Simulink ◽  
Fuzzy Pid Controller ◽  
Braking System ◽  
Braking Distance ◽  
Better Than

Control methods of the anti-lock braking system have been researched. A BP based Fuzzy-PID controller is proposed to reduce the time and the distance during braking. Through the compare of PID controller and fuzzy-PID controller and the BP based Fuzzy-PID controller which were simulated on Matlab/Simulink, it shows that BP based Fuzzy-PID controller has shorter braking distance and less braking time. So ABS with BP based Fuzzy-PID controller will work better than traditional PID controller.

scholarly journals DETERMINATION OF FREIGHT WAGON PARAMETERS ACCORDING TO THE SPECIFIED CRITERIA OF THE TRAIN BRAKING EFFICIENCY (four-axle gondola cars, covered cars, platforms, dump cars)

2021 ◽  
pp. 101-110
Author(s):  
Oleksandr Safronov ◽  
◽  
Yurii Vodiannikov ◽  
Olena Makeieva
Keyword(s):  
Axial Load ◽  
Gear Ratio ◽  
Normative Values ◽  
Power Relationship ◽  
Freight Train ◽  
Braking Performance ◽  
Brake Pads ◽  
Braking System ◽  
Braking Distance

The lack of normative values of the actual coefficients in the new rules of HOST 34434-2018 do not allow to implement and determine the optimal characte-ristics of the brake according to pre-accepted conditions of braking efficiency (braking distance), which causes uncertainty in solving this problem. The uncertainty is that the choice of characteristics of the braking system of the freight wagon has to be done by searching a large number of options. In this regard, the paper provides tools for determining the actual pressing force of the brake pads on the wheels, which complies with the specified braking performance of the freight train. As a tool, universal formulas are used in the form of a power relationship between the actual force of the brake pads and the braking distance of the freight train. The coefficients of universal formulas are obtained on the basis of computer modeling. Numerous examples show that the error in the use of universal formulas in calculation studies does not exceed 1% compared with the calculation method according to HOST 34434-2018. The values of the actual coefficients depending on the axial load of the wagon and the speed at which the braking distances of the freight train satisfy the normative minimum allowable values are given. It is shown that calculation studies performed according to the universal formulas in the EXCEL environment allows to fully automating the computational process. A method for determining the gear ratio of the brake lever of a freight wagon, according to which the specified braking efficiency is performed, is proposed. The proposed procedure allows you to perform a variety of studies to select the optimal parameters of the braking system of freight wagons that meet the specified requirements of braking efficiency, and greatly facilitates the calculation studies. Key words: аctual coefficient, braking distance, speed, axial load, power dependence, coefficients, gear ratio.

scholarly journals Braking Method of Electric Vehicle Based on Direct Drive Electro- Hydraulic Brake Unit

2015 ◽  
Vol 9 (1) ◽  
pp. 351-360 ◽  
Author(s):  
Xiaoxiang Gong ◽  
Siqing Chang ◽  
Lichen Jiang ◽  
Xiaopan Li
Keyword(s):  
Electric Vehicle ◽  
Electric Propulsion ◽  
Fuzzy Controller ◽  
Slip Rate ◽  
Direct Drive ◽  
Wheel Slip ◽  
Braking Performance ◽  
Braking Distance ◽  
Set Up ◽  
Wire System

For the characteristics of full electric propulsion, a novel kind of brake-by-wire unit is designed for electric vehicle to improve braking performance. A comprehensive brake-by-wire system including this unit is set up after its structure and principle are introduced. Then, a multi-layer fuzzy controller is proposed to regulate decelerate and wheel slip rate, and an optimal regenerative strategy is proposed to recover braking energy. At last, the experiment of brake unit is completed to verify that this novel unit is technologically feasible, and an electric vehicle co-simulation model based on MATLAB/Simulink and AMESim is established to prove that this novel unit is able to significantly improve braking performance of electric vehicle. The simulation result shows braking distance and time are shorten by 12.19% and 15.54% respectively compared with conventional ABS system in the same braking condition, and the recovery efficiencies in light and heavy braking are 53% and 28% respectively.

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.

The Analysis of the Key Problems about Traffic Accident Speed Identification Based on Braking Traces

2013 ◽  
Vol 756-759 ◽  
pp. 4752-4757
Author(s):  
Zhi Wei Guan ◽  
Shao Hua Wang ◽  
Wei Qiang Liang ◽  
Ming Feng Zheng ◽  
Lin Wu ◽  
...  
Keyword(s):  
Traffic Accident ◽  
Performance Test ◽  
National Standard ◽  
Test Report ◽  
Actual Case ◽  
Braking Performance ◽  
Braking Distance ◽  
Braking Process ◽  
Judicial Expertise ◽  
Speed Identification

In order to improve the impartiality and objectivity of judicial expertise, the key problems about traffic accident speed identification are analyzed and the speed of vehicle is calculated by using the braking performance test report with reference to the national standard and automobile theory. The automobile dynamics of driver braking process is analyzed, all kinds of key problems such as the braking distance, braking coordination time, braking speed, longitudinal sliding coefficient of adhesion are combined with the braking performance test report, and the method of determining the longitudinal sliding coefficient of adhesion is proposed, the instantaneous velocity before the collision is calculated. Finally, the method is used to calculate the speed of an actual case, and simulated in the software of PC-Crash, the results are consistent, verifying that the speed identification method is correct.

Hydraulic Pressure Control and Parameter Optimization of Brake-by-Wire System Based on Driver-Automation Cooperative Driving

2018 ◽  
Author(s):  
Xiaohui Liu ◽  
Liangyao Yu ◽  
Sheng Zheng ◽  
Jinghu Chang ◽  
Fei Li
Keyword(s):  
Parameter Optimization ◽  
Pressure Control ◽  
Intelligent Vehicle ◽  
Hydraulic Pressure ◽  
Braking Performance ◽  
Driving Mode ◽  
Automatic Driving ◽  
Cooperative Driving ◽  
Braking System ◽  
Wire System

The automatic driving technology of vehicle is being carried out in real road environment, however, the application of unmanned vehicle still needs proof and practice. Autonomous vehicles will be in the stage of co-drive for a long time, that is, driver-control and autonomous system assisting or autonomous system control and driver assisting. The braking system of the intelligent vehicle needs to work in driver driving mode or automatic driving mode during a long stage. Brake-by-Wire system is the development trend of vehicle braking system. The brake modes of the Brake-by-Wire system can be switched easily and it can satisfy the demand for braking system of the intelligent vehicle. However, when the driving mode changes, the characteristic of the braking intention and braking demand will change. In order to improve the braking performance of the intelligent vehicle, hydraulic pressure control and parameter optimization of the Brake-by-Wire system during different driving modes should be different. Researches are made on hydraulic pressure control and parameter optimization of the Brake-by-Wire system with consideration on differences of braking intensity input and braking requirement between driver driving mode and automatic driving mode through theory analysis, Matlab/Simulink-AMESim simulation and bench test. The study is helpful for improving the braking performance of Brake-by-Wire system in hydraulic pressure control of driver-automation cooperative driving.

Antilock Braking System Slip Control Modeling Revisited

2013 ◽  
Vol 393 ◽  
pp. 637-643 ◽  
Author(s):  
M.H.M. Ariff ◽  
Hairi Zamzuri ◽  
N.R.N. Idris ◽  
Saiful Amri Mazlan
Keyword(s):  
Braking Performance ◽  
Slip Control ◽  
Quarter Car Model ◽  
Braking System ◽  
Car Model ◽  
Starting Point ◽  
Antilock Braking System ◽  
The Subject ◽  
Control Modeling ◽  
Systems Studies

The introduction of anti-lock braking system (ABS) has been regarded as one of the solutions for braking performance issues due to its notable advantages. The subject had been extensively being studied by researchers until today, to improve the performance of the todays vehicles particularly on the brake system. In this paper, a basic modeling of an ABS braking system via slip control has been introduced on a quarter car model with a conventional hydraulic braking mode. Results of three fundamental controller designs used to evaluate the braking performance of the modeled ABS systems are also been presented. This revisited modeling guide, could be a starting point for new researchers to comprehend the basic braking system behavior before going into more complex braking systems studies.

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