scholarly journals Study on Pressure Change Rate of the Automatic Pressure Regulating Valve in the Electronic-Controlled Pneumatic Braking System of Commercial Vehicle

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 938
Author(s):  
Hanwei Bao ◽  
Zaiyu Wang ◽  
Zihao Liu ◽  
Gangyan Li
Keyword(s):  
Control Method ◽  
Pressure Change ◽  
Autonomous Driving ◽  
Commercial Vehicles ◽  
Change Rate ◽  
Braking System ◽  
Theoretical Support ◽  
Automatic Pressure ◽  
Braking Process ◽  
Vehicle Dynamic Model

In contrast to the traditional pneumatic braking system, the electronic-controlled pneumatic braking system of commercial vehicles is a new system and can remedy the defects of the conventional braking system, such as long response time and low control accuracy. Additionally, it can adapt to the needs and development of autonomous driving. As the key pressure regulating component in electronic-controlled pneumatic braking system of commercial vehicles, automatic pressure regulating valves can quickly and accurately control the braking pressure in real time through an electronic control method. By aiming at improving driving comfort on the premise of ensuring braking security, this paper took the automatic pressure regulating valve as the research object and studied the pressure change rate during the braking process. First, the characteristics of the automatic pressure regulating valve and the concept of the pressure change rate were elaborated. Then, with the volume change of automatic pressure regulating valve in consideration, the mathematical model based on gas dynamics and the association model between pressure change rate and vehicle dynamic model was established in MATLAB/Simulink and analyzed. Next, through the experimental test of a sample product, the mathematical models have been verified. Finally, the key structure parameters affecting the pressure change rate of the automatic pressure regulating valve and the influence law have been identified; therefore, appropriate design advice and theoretical support have been provided to improve driving comfort.

Control of a Composite Braking System for Range-Extended Heavy Commercial Vehicles

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Xuebo Li ◽  
Jian Ma ◽  
Xuan Zhao ◽  
Lu Wang ◽  
Haichao Lan
Keyword(s):  
Commercial Vehicles ◽  
Braking System

Independent wheel control system design for highly automated driving

2021 ◽  
pp. 095440702110065
Author(s):  
Shihuan Li ◽  
Lei Wang
Keyword(s):  
Control System ◽  
Control Method ◽  
Autonomous Driving ◽  
Control System Design ◽  
Steering Control ◽  
Automated Driving ◽  
Accuracy And Precision ◽  
Actual Observation ◽  
Control Scheme ◽  
Interference Measurement

For L4 and above autonomous driving levels, the automatic control system has been redundantly designed, and a new steering control method based on brake has been proposed; a new dual-track model has been established through multiple driving tests. The axle part of the model was improved, the accuracy of the transfer function of the model was verified again through acceleration-slide tests; a controller based on interference measurement was designed on the basis of the model, and the relationships between the controller parameters was discussed. Through the linearization of the controller, the robustness of uncertain automobile parameters is discussed; the control scheme is tested and verified through group driving test, and the results prove that the accuracy and precision of the controller meet the requirements, the robustness stability is good. Moreover, the predicted value of the model fits well with the actual observation value, the proposal of this method provides a new idea for avoiding car out of control.

scholarly journals Plugging Braking of Two-PMSM Drive in Subway Applications with Fault -Tolerant Operation

2016 ◽  
Vol 12 (1) ◽  
pp. 1-11
Author(s):  
Adel Obed ◽  
Ali Abdulabbas ◽  
Ahmed Chasib
Keyword(s):  
Pulse Width Modulation ◽  
Control Method ◽  
Fault Tolerant ◽  
Permanent Magnet Synchronous Motor ◽  
Voltage Source ◽  
Braking System ◽  
Simulink Model ◽  
Braking Torque ◽  
Subway Train ◽  
Electric Traction

The Permanent Magnet Synchronous Motor (PMSM) is commonly used as traction motors in the electric traction applications such as in subway train. The subway train is better transport vehicle due to its advantages of security, economic, health and friendly with nature. Braking is defined as removal of the kinetic energy stored in moving parts of machine. The plugging braking is the best braking offered and has the shortest time to stop. The subway train is a heavy machine and has a very high moment of inertia requiring a high braking torque to stop. The plugging braking is an effective method to provide a fast stop to the train. In this paper plugging braking system of the PMSM used in the subway train in normal and fault-tolerant operation is made. The model of the PMSM, three-phase Voltage Source Inverter (VSI) controlled using Space Vector Pulse Width Modulation technique (SVPWM), Field Oriented Control method (FOC) for independent control of two identical PMSMs and fault-tolerant operation is presented. Simulink model of the plugging braking system of PMSM in normal and fault tolerant operation is proposed using Matlab/Simulink software. Simulation results for different cases are given.

scholarly journals An adaptive system for autonomous driving

2020 ◽  
Vol 28 (3) ◽  
pp. 1189-1212
Author(s):  
Martin Zimmermann ◽  
Franz Wotawa
Keyword(s):  
Adaptive Control ◽  
Automotive Industry ◽  
Environmental Conditions ◽  
Environmental Changes ◽  
Adaptive System ◽  
Control Method ◽  
Autonomous Driving ◽  
Optimal Selection ◽  
Safe State ◽  
Over Time

Abstract Having systems that can adapt themselves in case of faults or changing environmental conditions is of growing interest for industry and especially for the automotive industry considering autonomous driving. In autonomous driving, it is vital to have a system that is able to cope with faults in order to enable the system to reach a safe state. In this paper, we present an adaptive control method that can be used for this purpose. The method selects alternative actions so that given goal states can be reached, providing the availability of a certain degree of redundancy. The action selection is based on weight models that are adapted over time, capturing the success rate of certain actions. Besides the method, we present a Java implementation and its validation based on two case studies motivated by the requirements of the autonomous driving domain. We show that the presented approach is applicable both in case of environmental changes but also in case of faults occurring during operation. In the latter case, the methods provide an adaptive behavior very much close to the optimal selection.

Braking intention recognition algorithm based on electronic braking system in commercial vehicles

2019 ◽  
Vol 26 (3/4) ◽  
pp. 268 ◽  
Author(s):  
Hongyu Zheng ◽  
Shenao Ma ◽  
Lingxiao Fang ◽  
Weiqiang Zhao ◽  
Tianjun Zhu
Keyword(s):  
Recognition Algorithm ◽  
Commercial Vehicles ◽  
Braking System ◽  
Intention Recognition

The Combined Control of the Steering and Braking System of the Vehicle Rollover Avoidance Control

2013 ◽  
Vol 473 ◽  
pp. 239-242
Author(s):  
Guo Li ◽  
Ya Yun Liu ◽  
Yan Sun
Keyword(s):  
Control Method ◽  
Degree Of Freedom ◽  
Control Effect ◽  
Braking System ◽  
Combined Control ◽  
Vehicle Rollover ◽  
Avoidance Control ◽  
Three Degree Of Freedom ◽  
Physical Quantities ◽  
Switch Module

This paper analyzed vehicle rollover dynamic model when vehicle steering and rollover is occurring, which based on basic vehicle rollover problems. Three-degree-of-freedom vehicle roll model which considering roll angle was established, and physical quantities of model were analyzed. Input and output quantities were analyzed based on vehicle roll model, feedback quantities were determined, too. Controller state reset was added into traditional controller switch module so as to avoid undesired instantaneous pulse which appeared during switching. Three-degree-of-freedom vehicle roll model was put up in Simulink, Controller parameters set was tuned and I/O data were prepared to optimize control effect. The control method in this paper was verified finally.

Scaled Experimental Stand for Testing Control Algorithms on Brake Systems with Anti-Lock Capability

2010 ◽  
Vol 166-167 ◽  
pp. 121-126 ◽  
Author(s):  
Valentin Ciupe ◽  
Steliana Vatau ◽  
Inocentiu Maniu
Keyword(s):  
Test Stand ◽  
Control Algorithms ◽  
Functional Parameters ◽  
Braking System ◽  
Experimental Stand ◽  
Angular Velocities ◽  
Custom Hardware ◽  
Braking Process ◽  
Rolling Wheel

The paper presents a scaled experimental stand for applying different algorithms onto a braking system with anti-lock capability, in order to determine the best way to control the braking process. The stand consists of a test wheel with an electro-mechanic brake caliper rolling against a powered tambour track. The angular velocities of both rolling wheel and track are monitored by a PC using custom hardware and software. The functional parameters of the test stand can be modified, thus employing different approaches for the anti-lock function of the braking process.

Analysis of Effect on Change Rate of Wheel Cylinder Pressure for Electro-Hydraulic Brake System of Electric Vehicle

2012 ◽  
Vol 209-211 ◽  
pp. 2094-2099
Author(s):  
Xiu Yuan Xing ◽  
Ze Chang Sun ◽  
Meng Wang
Keyword(s):  
Electric Vehicle ◽  
Pressure Change ◽  
Brake System ◽  
Impact Factors ◽  
Cylinder Pressure ◽  
Change Rate ◽  
Hydraulic Brake ◽  
Brake Pressure ◽  
New Type ◽  
The Impact

Based on a new type of electro-hydraulic brake system of electric vehicle, the operating principle was studied. A model of hydraulic brake system and corresponding control strategy were built with the co-simulation platform of AMESim and MATLAB. The impact factors of brake pressure change rate were analyzed theoretically. The influences of the main hydraulic parameters were analyzed through simulation, such as volume of brake fluid, type of pipe, ABS valve and brake clearance. The results provide a theoretical basis for the accurate control of wheel cylinder pressure.

Sign in / Sign up

Export Citation Format

Share Document