Papers by Keyword: Brake System

Abstract: Tadpole vehicles are becoming more and more common in transportation applications, so it is crucial to have a thorough understanding of their braking dynamics to ensure the highest level of performance and safety. Their unusual three-wheel design, tadpole vehicles offer a unique set of opportunities and challenges when it comes to braking systems. By implementing a modified mathematical model designed especially to capture all aspects of braking dynamics in tadpole vehicles, this paper fills a gap in the frame of existing literature. As a practical testbed, a tadpole vehicle was utilized to collect empirical data for braking parameters. This specific tadpole vehicle has Alto brakes installed. The implemented mathematical model achieved a higher level of accuracy and precision by integrating the actual data. Traditional braking equations were modified and improved upon in order to take into account the unique characteristics of a tadpole vehicle. A complex 3-degree-of-freedom Simulink model was developed to provide a thorough understanding of straight-line braking dynamics in tadpole vehicles. This model made it possible to investigate in-depth how different factors interact to affect the braking performance. The simulation produced precise and thorough results providing insights into the unique advantages and difficulties presented by tadpole vehicle configurations during straight-line braking.

Abstract: A hardware-in-the-loop (HIL) simulation test bench for subway train brake systems is built in this paper to avoid the high costs of brake system field tests and maintain the reliability of test results. The HIL simulation test bench consists of a simulation part a hardware part. The simulation part includes a train model and a GUI. The hardware part mainly consists of six pneumatic brakes and a driver controller, which is used to generate brake commands. Signal transmissions between the simulation and hardware parts are realized using DAQ and signal transformation boards, as well as an MVB network. Test results suggest that the HIL test bench proposed is able to reproduce the braking behaviours of a train rather well, thus it can be used to carry out train braking tests in place of the costly field tests in some occasions.

Abstract: Vehicle braking system in vehicle security plays an important role.In recent years, with the progress of vehicle technology and improvement of the car speed, the rapid development of electronic technology provides a more broad space of development to the braking system. Based on the use of electronic technology in automobile braking system present situation as the research object, the application of electronic technology in automobile braking system has carried on the detailed exploration and research, to promote the further study of electronic technology in automobile braking system and the application.

Abstract: Papers present a new solution for achieving downforce to a brake disc, using a drive gear and ball screw-nut, which the construction adopted, allows moving ball-screw and making the necessary downforce for breaking. The stand includes downforce creating system required by deceleration, and is equipped with a plurality of sensors to determine the following parameters. Measurement of downforce-ring load cell, displacement in the running drive-pressure transducer, mechanism decoupling travel-differential inductive transducer, electrical motor and gear drive mechanism speed-speed transducer, and electric drive motor torque-lamellar load cell. These transducers allow the control of screw ball to realize the forces that are acting on the brake linings in order to control the speed of the vehicle. Using this construction, brake actuation can get higher quality reactions in brake systems.

Abstract: This paper deals with the problem of braking process modeling. A subway train braking process simulation software is built, which composes of a GUI and a underlying model. The underlying model consists of a train model and a brake system model. The train model is simplified and built by assembling subcomponent element models of a railway vehicle. The brake system model is simplified and built based on experimental data in order to reduce computational effort. The GUI of the software can be use to input model parameters, display simulation results, and store simulation data. As a result of the simplifications of the modeling process, the developed software can perform real time simulation.

Abstract: A conjoint simulation of suspension system and brake system is proposed based on vehicle braking performance and ride stability. A half car simulation model is built applying the software of MATLAB in which the dynamic load is used to control the active force for suspension system and adjust parameter value of ABS (Anti-lock brake system). The suspension system and ABS construction of the half car simulation model is illustrated in detail. Using the simulation model, the braking distance, the stroke for suspension and the pitch angle of body are measured in three status which include the individually control for active suspension, the individually control for ABS and the integration control respectively. The simulation data show that the integral control method synchronously ensures braking stability and riding stability.

Abstract: The paper analyzed the influence of the friction factor theoretically on the brake system to produce noise, through complex modal analysis method, established the finite element model of air disc brake to analyze and forecast the brake noise and get brake noises frequency on a certain test conditions. Through the analysis of multiple sets of brake noise under different friction coefficient, it is concluded that the increase of friction coefficient has a promoting effect on brake noise.

Abstract: Air pressure brake and hydraulic brake is widely used in automotive as two kinds of brake system, and the air brake system is widely used in medium and large vehicles. But because of air pressure brake system with air as medium, this will appear in use easily leak etc and make the attenuation, unreliable phenomenon such as lost, which can cause the occurrence of traffic accidents. Study the kind of situations, an electromagnetic control pneumatic brake valve can be designed. Current is as a medium of braking signals through the strength of the current air output proportional control to control the brake, this technology can solve the problems which the wheel brake is out of sync, brake uncoordinated and small braking force.

Abstract: This paper analyzes the principle and structure of the relay valve, and AMEsim software is used to build up a relay valve model which can be used to simulating fault. And the model has been verified by comparing to the routine test data. Considering failure mechanism of various components of the relay valve, a modified relay valve model which can simulate some kinds of typical fault is built up. The braking system performance is researched under different kinds of fault. By analyzing and classifying the characteristics of brake cylinder pressure curve, piston displacement curve under kinds of fault condition, the fault reasons and actual fault location can be detected, which provides help for the relay valve maintenance and fault detection.

Abstract: At present, the ABS braking system has been widely used in vehicle brake system, has become the important mechanism of automobile brake performance. This paper use the advantage of AMESim software for hydraulic system modeling, and build up the the model of ABS for the automobile brake system according to ABS system working principle, Simulation of automobile ABS hydraulic brake system work process, through the relevant parameter settings, compare and analysis the impacts made by some elements of the whole ABS system, finally make the foundations for the brake system for further optimization and improvement.