Papers by Keyword: Anti-Lock Braking System

Abstract: A PID Anti-lock Braking Control system has been designed according to the principle and method of vehicle dynamic. A vehicle dynamic mode which includes tire model, the controller model and braking model has been set up by the MATLAB/Simulink software. The vehicle straight line braking condition has been simulated by using the model, compared and analysed the influence of slip ratio and braking distance by the system, the results show that the design was effective and feasible which also can achieve the goal of prevent wheels locking.

Abstract: This paper presents a single wheel model which can make the car to maintain linear motion during braking based on elaborating control mechanism of Anti-lock Braking System (ABS). PID control and fuzzy PID control were used to control the single wheel model. According to the properties of PID control and fuzzy PID control to establish brake model of automobile straight-line-braking by using Matlab software and Simulink module. The results show that fuzzy PID controller presents a better effect and has a better adaptability.

Abstract: Many different control methods for Anti-lock Braking System (ABS) have been developed. In this paper, a new control algorithm is proposed for ABS based on sliding mode control algorithm, which represents the nonlinear characteristics of external interferences. The proposed sliding mode controller guarantees a highly robust performance against large variations in the system parameters and disturbances. Simulation results show that the proposed method has advantages compared with conventional linear controllers.

Abstract: In Anti-lock Braking System (ABS), the traditional method controlled the brake force with logical way and PID, it can not control ABS based on information of road condition, the speed of wheel and the speed of vehicle, it braked with a long distance and was dangerous. So, a optimized algorithm for advanced vehicle Anti-lock Braking System is proposed, gathering information on speed of vehicle, speed of wheel and road condition together to count real-time slip ratio, with Fuzzy Neural Network (FNN),the brake force of four wheels was controlled differently according to the different condition of wheel with slip ratio. The experiment showed that compare with normal algorithm, the stop distance became 20% shorter with this optimized algorithm and the algorithm is very stable.

Abstract: The anti-lock braking system is an important part of automotive electrics, and relates the automobile safety performance. To aim at the strict signal control problem of the brake power in the anti-lock braking system, the automotive anti-lock braking system working principle is analyzed, and an experiment of automotive anti-lock braking system signal processing based on electrical mechanism was advanced. Then, the modeling structure, data and test of automotive anti-lock braking system signal processing applied four-wheel speed sensors were particularly presented. Finally, the experimental results proved that it was fast and accurate, and provided the suitable gist of automotive anti-lock braking system control at the view of application.

Abstract: 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.

Abstract: According to the ideal wheel speed change curve during the ABS braking and the vehicle inertia electromechanical mixed analog principle, the bench testing system for vehicle ABS performance was designed. In order to improve the reliability of the wheel velocity detection and optimize the systematic structure, the method of using the free roller to detect wheel speed and the regenerative braking energy compensation of asynchronous motor were proposed. The results show that designed test bench system can achieve ABS performance testing.

Abstract: A control strategy for pneumatic ABS(Anti-lock Braking System) of commercial vehicle has been developed and validated by combining with Trucksim simulation software and by using hardware-in-the-loop test bench for hysteresis characteristics compensation. The test results show that the ABS control strategy satisfies the control requirements for system hysteresis characteristics, and improve the performance of pneumatic ABS system for commercial vehicle effectively, thus vehicle active safety is increased.

Abstract: Anti-lock braking systems (ABS) is a type of mechanical electrical system in which are used to prevent wheel locking of vehicle as a result of excessive actuation of the service braking system, especially on slippery roads. According to electric control unit (ECU) research requirement of ABS system, this paper introduce a hardware-in-the-loop simulation (HILS) test bench, which can through open and close loop test methods accomplish calibration the parameters of the inside ECU, performance evaluation and fault diagnosis and tolerance test, not only can shorten the development cycle, but also save research and development costs of ECU.

Abstract: According to the characteristics of the vehicle active chassis system, multi-model system including Electric Power Steering System (EPS), Anti-lock Braking System (ABS) and Semi-active Suspension system (SAS) is established. Then, using the strategy of intelligent hierarchical control, the coordinated controller of active chassis system is designed. The bottom layer controller includes 3 separate controllers, i.e., suspension, steering and braking system controllers. They are used to carry out different control tasks and achieve performance indexes of subsystems. The upper layer coordinated controller is used to judge the vehicle states. At the same time, combined with the vehicle chassis coordinated control logic and the characteristics of feed-back information coming from the bottom controllers, the upper coordinated controller make whole coordination and control decision-making to vehicle active chassis subsystems. The simulation results show that the intelligent hierarchical control can improve the vehicle operational performances effectively.