Brake System Modeling for Simulation and Control

1999 ◽  
Vol 121 (3) ◽  
pp. 496-503 ◽  
Author(s):  
J. Christian Gerdes ◽  
J. Karl Hedrick
Keyword(s):  
System Modeling ◽  
Control Valve ◽  
Brake System ◽  
Reduced Order ◽  
Pedal Force ◽  
Modeling Process ◽  
Brake Pressure ◽  
Simplifying Assumptions ◽  
Rapid Transients ◽  
And Control

This paper presents reduced-order models of brake system dynamics derived from a physical modeling perspective. The vacuum booster model combines a static control valve with dynamic air flows, resulting in the ability to easily reproduce both static hysteresis effects and rapid transients. Following the assumption of incompressible flow, a four-state model of the brake hydraulics is presented and, subsequently, reduced to one or two states for certain applications. Experimental results support the simplifying assumptions made during the modeling process by demonstrating better agreement with the response from pedal force to brake pressure than previously displayed in the literature. These models are intended for use in the design and analysis of vehicle control systems and the evaluation of driver/vehicle interactions through dynamic simulation.

Considerations on a Mass-Based System Representation of a Pneumatic Cylinder

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
M. Brian Thomas ◽  
Gary P. Maul
Keyword(s):  
Total Mass ◽  
Control Valve ◽  
System Model ◽  
Order System ◽  
Pneumatic Cylinder ◽  
State Variables ◽  
Pneumatic Actuators ◽  
Reduced Order ◽  
Highly Nonlinear ◽  
And Control

Pneumatic actuators can be advantageous over electromagnetic and hydraulic actuators in many servo motion applications. The difficulty in their practical use comes from the highly nonlinear dynamics of the actuator and control valve. Previous works have used the cylinder’s position, velocity, and internal pressure as state variables in system models. This paper replaces pressure in the state model with the mass of gas in each chamber of the cylinder, giving a better representation of the system dynamics. Under certain circumstances, the total mass of gas in the cylinder may be assumed to be constant. This allows development of a reduced-order system model.

Study on Fault Simulation for Pneumatic Actuator Model

2013 ◽  
Vol 706-708 ◽  
pp. 1025-1028 ◽  
Author(s):  
Zhi Gang Feng ◽  
Xue Juan Zhang
Keyword(s):  
System Modeling ◽  
Fault Simulation ◽  
Control Valve ◽  
Pneumatic Actuator ◽  
Actuator Failure ◽  
Matlab Simulink ◽  
Pneumatic Actuators ◽  
Actuator System ◽  
Working Principle ◽  
And Control

Actuator, as the execution of the terminal unit of the control system is directly related to the safe and reliable operation of the production process, and once actuators in the system malfunction, will bring huge losses. The research on pneumatic actuator not only devote to the study of its structure, but also need to study the basic theory of the actuator system modeling, and Laid a foundation for the study of the actuator fault diagnosis. Firstly, this paper introduces the components and working principle of the pneumatic actuators which mainly include three parts: pneumatic servomotor, positioner, and control valve. Secondly, the DABlib modules of MATLAB/Simulink as the simulation model of actuator failure are introduced. Finally, we analyzed the common faults of the pneumatic servomotor, positioner, and control valve, and in the MATLAB/Simulink environment, the faults are simulated, and describes the phenomenon of two typical fault.

Electronic Hydraulic Brake System Modeling and Simulation

2013 ◽  
Vol 850-851 ◽  
pp. 701-704
Author(s):  
You Yao ◽  
Xue Xun Guo ◽  
Ming Peng ◽  
Ji Bing Zhang ◽  
Jie Zhang
Keyword(s):  
Modeling And Simulation ◽  
Simulation Study ◽  
System Modeling ◽  
Simulation Software ◽  
Control Mode ◽  
Brake System ◽  
Practical Significance ◽  
Braking System ◽  
Hydraulic Brake ◽  
And Control

This paper introduces the structure, principle and control mode of the electronic hydraulic brake system, and using simulation software AMESim to carry on the modeling and simulation study. Through the simulation of the WBS brake system, and comparison between the theory and the test, the WBS model is introduced and analyzed, which has great theoretical and practical significance to the future braking system.

Simulation and Simulation Software Development of the Braking Process of a Subway Train

2014 ◽  
Vol 556-562 ◽  
pp. 294-301 ◽  
Author(s):  
Long Han ◽  
Chun Tian ◽  
Yan Wang ◽  
Meng Ling Wu ◽  
Zhuo Jun Luo
Keyword(s):  
Computational Effort ◽  
Simulation Software ◽  
System Model ◽  
Brake System ◽  
Railway Vehicle ◽  
Model Parameters ◽  
Modeling Process ◽  
Time Simulation ◽  
Subway Train ◽  
Braking Process

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.

Design and Simulation of Pedal Simulator in Brake by Wire System

2014 ◽  
Vol 556-562 ◽  
pp. 1358-1361 ◽  
Author(s):  
Wen Bo Zhu ◽  
Fen Zhu Ji ◽  
Xiao Xu Zhou
Keyword(s):  
Simulation Models ◽  
Control Algorithms ◽  
Brake Pedal ◽  
Braking System ◽  
Pedal Force ◽  
Performance Requirements ◽  
System A ◽  
Pedal Feel ◽  
And Control ◽  
Wire System

Wire of the brake pedal is not directly connected to the hydraulic environment in the braking By-wire system so the driver has no direct pedal feel. Then pedal simulator is an important part in the brake-by-wire system. A pedal force simulator was designed based on the traditional brake pedal curve of pedal force and pedal travel, AMESim and Matlab / Simulink were used as a platform to build simulation models and control algorithms. The simulation results show that the pedal stroke simulator and the control strategy meet the performance requirements of traditional braking system. It can be used in brake by wire system.

Damping of Self-Excited Pressure Pulsations in Petrodiesel Pipeline

2014 ◽  
Vol 630 ◽  
pp. 375-382 ◽  
Author(s):  
Daniel Himr ◽  
Vladimir Haban
Keyword(s):  
Hydraulic System ◽  
Check Valve ◽  
Control Valve ◽  
Sampling Frequency ◽  
Pressure Pulsations ◽  
One Dimensional ◽  
Fuel Storage ◽  
Excited Oscillation ◽  
Subsequent Measurement ◽  
And Control

A pumping station in a fuel storage suffered from pressure pulsations in a petrodiesel pipeline. Check valves protecting the station against back flow made a big noise when disc hit a seat. Due to employees complaints we were asked to solve the problem, which could lead to serious mechanical problems. Pressure measurement in the pipeline showed great pulsations, which were caused by self-excited oscillation of control valves at the downstream end of pipeline. The operating measurement did not catch it because of too low sampling frequency. One dimensional numerical model of the whole hydraulic system was carried out. The model consisted of check valve, pipeline and control valve, which could oscillate, so it was possible to simulate the unsteady flow. When the model was validated, a vessel with nitrogen was added to attenuate pressure pulsations. According to the results of numerical simulation, the vessel was installed on the location. Subsequent measurement proved noticeably lower pulsations and almost no noise.

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