Post on 10-Mar-2015
Year 2001
New Evidence Concerning Fatal Crashes Of
Passenger Vehicles Before And After Adding
Antilock Braking Systems
LEONARD EVANS and PETER H. GERRISH
Statistics of both the cars with anti-lock braking system and without anti-lock braking
system shown vas t differences in the sense of passenger’s security. Be it a van or a
car, the fatal crash rates for the passengers in the cars year before anti-lock brake
system as compared with the ones having anti-lock brake system shown that these
crashes are more fatal to the occupants of their own vehicle than the occupants of
other vehicle.
But with improved study in 1996-98 shown different results and came off the view
that the vehicles equipped with anti-lock braking system are less involved in the fatal
crashes of other vehicles.
These stats show a vast difference in pre-ABS and post-ABS vehicles. Such as pre
were more likely to be involved in fatal crashes than the post ones.
Year 2002
The effectiveness of antilock braking systems
in reducing accidents in Great Britain
Jeremy Broughton, Chris Baughan
Main purpose of ABS system is to provide the driver with more and more control
over the vehicles under drastic situations such as steering while applying brakes.
Two different groups, one from the pre-ABS era and the others who experienced it
were called for the collection of statistics and the purpose was to create and
unbiased study on the effectiveness of ABS system.
People having the experience of ABS systems were asked to give their experience
about any situation of accidents they got involved in. No doubt, ABS system shown
clear advantages in the prevention of accidents more as compared to Non-ABS
vehicles.
Study also shown that the system needs to be acknowledged first as the persons
above normal age shown no difference whether they are on ABS system or the
previous one. Same was the case with women. It were the young only who shown
the effectiveness of the system as well as prevention of accidents using this ABS.
The antilock braking system anomaly:
a drinking driver problem?
David W. Harless, George E. Hoffer
Anti-lock brake system mainly focuses on the security of the driver as maneuvering
the vehicle under drastic conditions becomes easier. This paper focuses on the
drinking-drivers using ABS system and the study has shown interesting results.
Drinker-drivers have shown that they are less benefitted with this ABS system than
the sober ones. Study shown that the risk-ratio of the drivers in the post-ABS
increased to 64% as compared to previous versions. Also this system had effect on
decreasing the risk-ratio for sober drivers to 11%.
Moreover study on different models of cars shown that with the latest versions, the
risk-ratio for drivers also went down but later on it was thought that instead of the
calendar year it is the service period that effects.
Cars having service period of three to four years shown lesser risk-ration and the fact
was either the drivers learned the system or may be the ratio of non-serious drivers
went down because of accidents.
Also this paper suggests in introducing the ABS system keeping in view the drinker
drivers, and one important factor is response factor.
Year 2003
Influences Of Braking System Faults
On Vehicle Dynamics
H. Straky, M. Kochem, J. Schmitt, R. Isermann
Braking system can be termed as one of the most important part of the vehicle,
considering the passenger safety. As what matters most is the application of brakes
in required time.
Studies have shown that most of the accidents occur when drivers lose control over
brakes or they just don’t know how to use the brake system equipped in their car.
This largely effects the vehicle dynamics and is explained in this paper.
The model of the vehicle dynamics together with the real hydraulic brake system
have shown that small faults like brake-fluid loss (leakage) or air-blisters in the
hydraulic subsystem of the brake system have a negligible effect on the vehicle
dynamics, comparable to the effects of changes in road surfaces or a small shifting of
the center-of-gravity of the vehicle.
Sometimes these small parts failure cause brake system to fail which results in car
crash and is somehow hard to avoid.
Simulated and Experimental Study Of
Hydraulic Anti-Lock Braking System
Using Sliding-Mode PWM Control
Ming-chin Wu, Ming-chang Shih This paper deals about the testing involving both stimulated and experimental study.
Controllers used involve pulse width modulation and switching control. Emergency
braking controlled by a standard commercial electric control unit is also performed
on the dynamic test stand and compared with the results of the designed systems.
Though ABS system is non-linear and varies with respect to time but when compared
with the mathematical model, it shows the same result as the experimental one.
Study has the following conclusions:
Elective regulation of wheel slip during emergency braking can be achieved by
implementation of sliding-mode control.
Elimination of chattering can be achieved by application of pulse width
modulation
Year 2004
No Data Found
Year 2005
Implementation-Aware Embedded Control
Systems
Karl-Erik A, Anton Cervin, and Dan Henriksson
The braking dynamics of a two wheel vehicle model on an incline are considered
using techniques from nonlinear dynamics. The model is planar and incorporates the
coupled dynamics of two independently braked wheels and the vehicle body, and
takes into account the slip dynamics of each wheel. From the wheel slip values and
the vehicle speed as dynamics state, it is shown that the behavior of the system can
be completely captured by studying a relatively simple phase plane problem
described.
Evaluation of Control Performance of Multi-stage Fuzzy
Reasoning in Anti-lock Braking System for Railways Using
Fuzzy Reasoning
Tetsuya Asanome ,Toshiaki Nonaka, Yasunori Endo, Shin-
ichi Nakazawa, and Hiroshi Yoshikawa
ABS system for railways is one of the way minimizing the risk for railways. ABS for
railways has already been put in practical use. This research work, a new type of ABS
that uses one stage fuzzy reasoning and compare the control performances of the
proposed ABS with the present ABS.
The paper discussed how to find the action of valves in the second stage of multi-
stage fuzzy reasoning of the present ABS. The proposed ABS shortens the braking
distance and reduces the wheel damage.
A siliding mode scheme for optimal
Braking and Estimation of Road/Tyre
Friction
N.Patel, C. Edwards and S.K. Spurgeon
There is always a research going on to incease the safety measures for driving. A
large number of control systems have been developed to improve safety and
handling of the vehicle. The credibility of these controllers depend upon the precise
level of the information about the real-time behavior of the vehicle. Recently a
method has been proposed by Drakunov about sliding mode controller.
The idea proposed is this paper is model based and seeks to mantain the longitudnal
slip value associated with the tyre road contact patch at an optimum value.
Year 2006
Driver-training and emergency brake performance in
cars with antilock braking systems
Andrew Petersen, Rod Barrett , Steven Morrison
A research was conducted in 2006 to evaluate the brake performance of drivers after
and before two day training programs. These vehicles were equipped with antilock
braking systems. The drivers were trained for braking techniques that was applicable
to cars with and without antilock braking systems. The speed parameters were 80 to
100 kmh-1. All drivers took part in emergency brake tests in an ABS equipped car
before and after the training. The drivers who took the training had a improved
braking performance. They had smoother braking profile, better body position and
stability, and they were less dependent on ABS activation.
The techniques taught during the test improved the driver efficiency. New cars are
equipped with ABS. But for the cars without ABS, drivers after training showed a
acceptable performance.
Year 2007
No Data Found
Year 2008
Designing a sliding mode controller for slip control
of antilock brake systems
A. Harifi, A. Aghagolzadeh, G. Alizadeh, M. Sadeghi
Antilock braking system has been designed to attain maximum negative acceleration
by preventing wheels from locking. It has been proved that friction between tire and
road is a nonlinear function of wheel slip. Therefore, to achieve maximum negative
acceleration, a control system can be designed for wheel slip regulation at its
optimum value. Due to the nonlinearity of parameters and uncertainty in mass and
center of gravity of the vehicle and road condition, a robust control is required. In
this paper, a sliding mode controller for wheel slip has been designed based on a two
axle vehicle model. The parameters for vehicle dynamics include two separated
brake torques for front and rear wheels and longitudinal weight transfer due to the
acceleration and deceleration. In this research the design of the primary controller
has been improved.
The proposed method presents a sliding mode control method to regulate slips in the
front and rear wheel
under specified bounds of uncertainty which utilizes integral switching surface in
chattering reduction that
proves thriving. In addition, the efficiency of the method surpasses the advantages of
the fuzzy controller.
Year 2009
Adaptive feedback linearization control of
antilock braking systems using neural networks
Amir Poursamad
ABS systems maximize the braking force and steeriblity is mantained by controlling
the wheel slip. Two major problems encountered during control of ABS system are
nonlinear braking dynamics and uncertain nature of the parameters. This research is
about an adaptive neural network based hybrid controller for antilock braking
systems. The hybrid controller is based upon feedback linearization, combined with
two feedforward neural networks that are proposed so as to learn to nonlinearities
of the antilock braking system associated with feedback linearization controller.
The neural networks are tuned online to estimate the associated nonlinearities.The
simulation reveal that the proposed controller can achieve desirable performance
under transition between various road conditions.
Comparison between braking and steering yaw moment
controllers considering ABS control aspects
Jeonghoon Song , Woo Seong Che
This research discusses the improvement of the two yaw motion control systems, a
braking yaw motion controller (BYMC) and steering yaw motion controller (SYMC). A
BYMC controls the braking pressure of the rear inner wheel, while a SYMC steers the
rear wheels to allow the yaw rate to track the reference yaw rate. A 15 degree-of-
freedom vehicle model, simplified steering system model, are driver model are usd
to evaluate the proposed BYMC and SYMC. An antilock braking system controller is
also designed and developed. BYMC and SYMC reduce the slip angle when braking
and steering input are applied simultaneously, thereby increasing the controllability
and stability of the vehicle on the slippery roads.
Year 2010
Genetic fuzzy self-tuning PID controllers for
antilock braking systems
Abdel Badie Sharkawy
Since the introduction of PID controllers, more sophisticated versions of these
systems are being developed to achieve better performance. ABS system is greatly
affected by variations in weight, friction between the road, road inclination and
other nonlinear dynamics may highly affect the performance of antilock braking
system. A controller that is self tuned is required for that. This research develops a
self-tuning PIC control scheme with an application to ABS via combination of fuzzy
and genetic algorithms. The goal is to minimize the stop distances and keeping the
slip ratio of the tires within desired ranger.
This paper uses three decoupled modules, one for each PID parameters. Each
module is two-input noe-output fuzzy system. The performance has been verified
using the ABS.The robustness against road friction has been considered.
Genetic fuzzy self-tuning PID controllers for antilock braking
systems In situations where providing a control action to even a minimal degree of
satisfaction is a problem. Variations in nonlinear dynamics may highly affect the performance of antilock braking systems (ABS). The objective is to minimize the stopping distance, while keeping the slip ratio of the tires within desired range.
A fuzzy self-tuning scheme utilizes three decoupled modules. Road friction characteristics has been considered. The goal is to keep the slip ratio to an assigned value (0.2) despite road friction characteristics. The proposed control scheme can be followed for linear and nonlinear systems. It has the ability to switch on/off any of the control actions. It is used for drift..
A novel method for non-linear control of wheel slip in anti-lock braking
systems Anti-lock braking system (ABS) provides active safety for vehicles during braking by regulation of the wheel slip at its optimum value. In this paper increased robustness designed for ABS. Braking torque control law is developed for ABS. To increase the robustness of the controller, the integral feedback technique is applied. The performance of the proposed controller is compared with that of a sliding mode controller simulations of braking on dry and slippery roads.
In this research, a new controller is developed for ABS by the response prediction of a continuous non-linear vehicle dynamics model. To increase the robustness of the controller, the integral feedback technique is appended to the design method. It concludes that proposed controller proves to be better than a sliding controller anti-lock braking systems
Research on the Coordination Control of Vehicle EPS
and ABS
It is based on the dynamic model of Electric Power Steering System(EPS) and Anti-lock Braking System (ABS) and the coordination controller are respectively designed according to the motion coupling relation between the steering system and the braking system. The simulation under Matlab and on LabVIEW have tested and verified the vehicle maneuverability and braking performance. The results show that the coordination control improved the performance of vehicle.
The results show that, coordination control effectively improves the comprehensive performance of vehicle. This test solves various problems in the control systems of vehicle. These tests are used in the research and development of electrical control system of vehicle.
Year 2011
Engineering practice and the making of anti-lock brakes
Brake. Skid. Stutter. Stop. Driving on a wet or icy road, stopping a car in the early 21st century often follows this pattern. In Johnson’s work thoughtout exploration of the processes of engineering research and design. The cars and trucks will lose control when attempting to stop on slick surfaces was one of the features of the early automobile age. First it was based on driver skills that how he applies the break accordingly. This antilock breaking system was not only applied by automotive research, but bye efforts to make the airplane landing safe. But Johnson’s remarks on this serve to remind us that all engineering systems, no matter how clever and complex, are ultimately human systems as well.