Model-Based Pneumatic Braking Force Control for the Emergency Braking System of Tractor-Semitrailer

2018 ◽  
Author(s):  
Bing Zhu ◽  
Yao Feng ◽  
Jian Zhao
Keyword(s):  
Force Control ◽  
Emergency Braking ◽  
Braking System ◽  
Model Based ◽  
Braking Force

The Research of Magnetic Track Brake System

2013 ◽  
Vol 427-429 ◽  
pp. 1342-1345
Author(s):  
Yu Chun Pei
Keyword(s):  
Brake System ◽  
Regenerative Braking ◽  
Light Rail ◽  
Emergency Braking ◽  
Braking System ◽  
Rail Vehicle ◽  
Load Change ◽  
Parking Brake ◽  
Braking Force

This paper introduces the braking system scheme of low floor light rail vehicle, applying the regenerative braking and magnetic track brake, realizes service braking, emergency braking, parking brake and holding brake, also adjusts the braking force according to the load change.

Research on Analog Simulation of Automobile ABS Based on Unigraphis Software

2013 ◽  
Vol 380-384 ◽  
pp. 648-651
Author(s):  
Jun Long Zheng
Keyword(s):  
Traffic Accidents ◽  
Analog Simulation ◽  
Emergency Braking ◽  
Emergency Situations ◽  
Braking System ◽  
System Temperature ◽  
Working Principle ◽  
Calculation Module ◽  
Braking Force ◽  
Set Up

Many traffic accidents are caused by automobile brake problems, human consciousness is difficult to accurately control the car's emergency braking in emergency situations, which requires a special automotive braking system ABS that assists the driver to prevent accidents. ABS system goes through the way of pumping to brake, it can prevent automobile from slipping phenomenon due to tire locked die. The automobile ABS system' working principle and its performance are studied, the first part elaborates the working principle and its work flow of ABS system; the second part establishes the EBD control mathematical model of ABS system; in the third part, the use of Unigraphis software carries out simulation for vehicle ABS, automobile brake and vehicle ABS integrated model are set up by Unigraphis software powerful modeling functions, using the calculation module calculates the change of temperature as well as braking force in process of braking, finally to obtain the system temperature of ABS system that is small in the process of braking, however the braking force is a change of curve, so as to prevent slipping phenomenon caused by the tire locked die, providing the theoretical basis for the design and research of ABS.

scholarly journals Assessment of the functional functionality of passenger car brake systems by changing the braking distance during operation

2021 ◽  
Vol 13 (1) ◽  
pp. 78-86
Author(s):  
Alexander Nazarov ◽  
◽  
Vitalii Kashkanov ◽  
Ivan Nazarov ◽  
Yevhen Ivanchenko ◽  
...  
Keyword(s):  
Operating Conditions ◽  
Passenger Cars ◽  
Passenger Car ◽  
Emergency Braking ◽  
Braking System ◽  
Braking Distance ◽  
Braking Force ◽  
Braking Process ◽  
Relative Change

The article discusses a methodology for assessing the functional suitability of brake systems to change the braking path of passenger cars, taking into account various operating conditions. The goal is achieved by using the method of mathematical modeling of the emergency braking process, taking into account the possible operating conditions of cars performing emergency braking at certain initial speeds, in particular, exceeding 100 km / h. Based on the analysis of scientific sources, it has been established that the determination of the braking efficiency of a vehicle classically occurs on the verge of blocking all wheels with known methods of distributing braking forces between the axles of the vehicle. In this case, the standards set the maximum value of the minimum deceleration and braking distance. In addition, the jump in the maximum possible value of the braking force between the wheels of each axle makes it possible to compare it with the requirements of DSTU 3649: 2010, and the assessment of the magnitude of this jump for each braking of the car is to establish its functional suitability. As a result, according to the magnitude of the jump in the maximum possible value of the braking distance, the change in the maximum allowable braking force of the car sets, and according to the magnitude of its jump, it is possible to assess the functional suitability of its braking system. As a result, the use of expert information on the value of jumps in the maximum possible value of the braking force of a car, affecting the braking torques and braking coefficient, can reduce the amount of experimental research and significantly reduce the time to reach an objective decision on the functional suitability of the brake systems of operated cars. The paper presents the results of theoretical studies of passenger cars Chevrolet Aveo, Lada Priora and Forza with different loads, performing emergency braking at an initial speed of 40-150 km / h on a road with dry asphalt concrete. The boundaries of the coefficient of the relative change in the braking distance of the tested passenger car, at which it is possible to make a conclusion about the functional suitability of its braking system, have been established.

A Novel Control Algorithm of Electronic Braking System for Trucks

2013 ◽  
Vol 694-697 ◽  
pp. 2106-2109
Author(s):  
Li Mai ◽  
Li Ya Wang ◽  
Pei Wen Mi ◽  
Sheng Nan Yang
Keyword(s):  
Control Algorithm ◽  
Rear Axle ◽  
Force Distribution ◽  
Vehicle Dynamic ◽  
Braking Performance ◽  
Emergency Braking ◽  
Braking System ◽  
Braking Force ◽  
Brake Wear ◽  
Vehicle Dynamic Model

Electronic Braking System (EBS) can improve the braking performance of trucks significantly. A novel control algorithm for EBS has been proposed in this paper, which consists of Driving Identification Module and Braking Force Distribution Module. Driving Identification Module can recognize the non-emergency braking situation according to the signal of the electronic braking pedal. Braking Force Distribution Module regulates the braking force on front and rear axle by comparing the slip-ratios on every axle. As a result, the optimum braking pressure on different axles can enhance the safety and balance the brake wear. The performance of the control algorithm has been simulated utilizing 15-DOF vehicle dynamic model. The results show that the control algorithm can provide a good braking feeling and the braking performance of the vehicle is perfect.

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.

Intelligent optimization of EV comfort based on a cooperative braking system

2021 ◽  
pp. 095440702110044
Author(s):  
Lingying Zhao ◽  
Min Ye ◽  
Xinxin Xu
Keyword(s):  
System Model ◽  
Regenerative Braking ◽  
Coupling Mechanism ◽  
Intelligent Algorithm ◽  
Distribution Strategy ◽  
Braking System ◽  
Logic Diagram ◽  
Braking Torque ◽  
Braking Force ◽  
The Time Domain

To address the comfort of an electric vehicle, a coupling mechanism between mechanical friction braking and electric regenerative braking was studied. A cooperative braking system model was established, and comprehensive simulations and system optimizations were carried out. The performance of the cooperative braking system was analyzed. The distribution of the braking force was optimized by an intelligent method, and the distribution of a braking force logic diagram based on comfort was proposed. Using an intelligent algorithm, the braking force was distributed between the two braking systems and between the driving and driven axles. The experiment based on comfort was carried out. The results show that comfort after optimization is improved by 76.29% compared with that before optimization by comparing RMS value in the time domain. The reason is that the braking force distribution strategy based on the optimization takes into account the driver’s braking demand, the maximum braking torque of the motor, and the requirements of vehicle comfort, and makes full use of the braking torque of the motor. The error between simulation results and experimental results is 5.13%, which indicates that the braking force’s distribution strategy is feasible.

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