Sprung Mass Motion Emulation in a Braking Test Rig

2015 ◽  
Author(s):  
Chunjian Wang ◽  
Qian Wang ◽  
Jeffery Anderson ◽  
Beshah Ayalew
Keyword(s):  
Load Transfer ◽  
Mass Motion ◽  
Test Rig ◽  
Braking Performance ◽  
Braking System ◽  
Control Scheme ◽  
Electromagnetic Linear Actuator ◽  
Braking Process ◽  
The Stability ◽  
Actuator Control

This paper describes a quarter-car braking test rig that includes a hardware-in-the-loop (HIL) means for emulating broader vehicle dynamic effects. The test rig utilizes actual vehicle components such as the suspension-tire assembly and braking system to accurately represent a vehicle during a braking event and a chassis dynamometer’s drum is used to simulate the longitudinal vehicle dynamics. The key problem addressed in this paper is the emulation of sprung mass motion with a commercial electromagnetic linear actuator. By accurately representing the motion, detailed effects such as load transfer that happens in a real braking process can be studied for its effect on the braking performance. The stability of the system with sprung mass emulation under different actuator control modes is analyzed. The successful and stable control scheme found is a cascaded control with a velocity tracking strategy. The workings of the test are illustrated via representative test results that include a locked-wheel braking event and a stop with an anti-lock braking system (ABS).

scholarly journals Simulation analysis of efficiency and stability for vehicle’s ABS control on combined steering and braking maneuvers

2019 ◽  
Vol 272 ◽  
pp. 01024 ◽  
Author(s):  
Feng YU ◽  
Jun XIE
Keyword(s):  
High Speed ◽  
Control Algorithm ◽  
Degrees Of Freedom ◽  
Simulation Analysis ◽  
Stability Control ◽  
Vehicle Stability ◽  
Slip Ratio ◽  
Braking Performance ◽  
Braking System ◽  
The Stability

Eight degrees of freedom vehicle model was established. Using the method of fuzzy control, the ABS control algorithm was designed based on slip ratio. Simulation analysis was done at speed of 15m/s, 20m/s, 25m/s under turning braking. The results show that the vehicle braking performance and vehicle stability at middle or low speed was improved by using the ABS controller, but qualitative analysis shows that phenomenon of vehicle instability was appeared at high-speed conditions. The turning braking stability under ABS controller was judged quantificationally by the stability judging formula. The results show that the requirements of stability control could not meet with only Anti-lock Braking System.

Design and Manufacturing of a Clutch and Brake System for Indoor Tire Testing

2017 ◽  
Author(s):  
Aamir K. Khan ◽  
Corina Sandu
Keyword(s):  
Rolling Resistance ◽  
Brake System ◽  
Main Task ◽  
Test Rig ◽  
Braking Performance ◽  
Current Configuration ◽  
Braking System ◽  
Actuation System ◽  
Clutch System ◽  
Transmission Shaft

The primary goal of this work is to implement a clutch and brake system on the single tire Terramechanics rig of Advanced Vehicle Dynamics Laboratory (AVDL) at Virginia Tech. This test rig was designed and built to study the performance of tires in off-road conditions on surfaces such as soil, sand, and ice. Understanding the braking performance of tires is crucial, especially for terrains like ice, which has a low coefficient of friction. Also, rolling resistance is one of the important aspects affecting the tractive performance of a vehicle and its fuel consumption. Investigating these experimentally will help improve tire models performance. The current configuration of the test rig does not have braking and free rolling capabilities. This study involves modifications on the rig to enable free rolling testing when the clutch is disengaged and to allow braking when the clutch is engaged and the brake applied. The first part of this work involves the design and fabrication of a clutch system that would not require major changes in the setup of the test rig; this includes selecting the appropriate clutch that would meet the torque requirement, the size that would fit in the space available, and the capability to be remotely operated. The test rig’s carriage has to be modified in order to fit a pneumatic clutch, its adapter, a new transmission shaft, and the mounting frame for the clutch system. The components of the actuation system consisting of pneumatic lines, the pressure regulator, valves, etc., have to be installed. Easy operation of the clutch from a remote location is enabled through the installation of a solenoid valve. The second part of this work is to design, fabricate, and install a braking system. The main task is to design a customized braking system that satisfies the various physical and functions constraints of the current configuration of the Terramechanics rig. Some other tasks are: design and fabrication of a customized rotor, selection of a suitable caliper, and design and fabrication of a customized mounting bracket for the caliper. A hydraulic actuation system is selected, since it is suitable for this configuration and enables remote operation of the brake. Finally, the rig is calibrated for the new testing configurations.

Enhanced Electromechanical Brake-by-Wire System Using Sliding Mode Controller

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
Mostafa R. A. Atia ◽  
Salem A. Haggag ◽  
Ahmed M. M. Kamal
Keyword(s):  
Experimental Work ◽  
Sliding Mode ◽  
System Model ◽  
Test Rig ◽  
Acceptable Error ◽  
Braking Performance ◽  
Braking System ◽  
Control Modules ◽  
Wire System ◽  
Electromechanical Brake

The importance of the brake-by-wire (BBW) system emerged from the fact that it replaces all the conventional hydraulic braking system components with electronic signals between sensors, control modules, and electrically driven braking actuators. This conversion has enormously contributed to the braking system performance in terms of responsiveness, integration with other vehicle subsystems, and an adaptive behavior in different driving circumstances. The aim of this research is investigating the sliding mode control (SMC) strategy to a proposed BBW system. To achieve this aim, BBW system is modeled and validated experimentally. The SMC strategy is applied to the model and validated experimentally. Moreover, this research focuses on compensating for the effect of worn pads on braking performance. The experimental work shows that the developed system model gives matched results with the experimental work. Applying SMC to the model shows a good performance in breaking operation with acceptable error. Applying of the SMC to the test rig shows a good performance with acceptable deviations. In addition, the experiments show that the control strategy is able to compensate the wear in braking pads and keep tracking the braking command.

An Automated Method for Evaluating Truck Design

1972 ◽  
Vol 94 (2) ◽  
pp. 425-432 ◽  
Author(s):  
A. I. Krauter ◽  
D. L. Bartel
Keyword(s):  
Design Procedure ◽  
Optimization Techniques ◽  
Lateral Stability ◽  
Systematic Method ◽  
Braking Performance ◽  
Simulation And Optimization ◽  
Braking System ◽  
Automated Method ◽  
The Stability ◽  
Lateral Behavior

A systematic method for the design and evaluation of tractor-semitrailer truck systems and components is presented. The method is general and involves the combination of simulation and optimization techniques to obtain an automated design procedure. An application of the method is given which uses the procedure to evaluate an ideal proportional braking system based on the stability and braking performance of the truck. A quantity which measures the lateral stability of the truck is used to show that ideal proportional braking can produce nearly optimal lateral behavior. The results obtained from the investigation also show that the combined design procedure is an effective method for studying and evaluating complex systems.

Research on Robust Control of Anti-Locked Braking System of Vehicles

2014 ◽  
Vol 543-547 ◽  
pp. 1504-1509 ◽  
Author(s):  
Yun Bing Yan ◽  
Hao Wu ◽  
Wei Qiang Wang
Keyword(s):  
Robust Control ◽  
Dynamic Features ◽  
Robust Controller ◽  
Slip Ratio ◽  
Braking Performance ◽  
Braking System ◽  
Parameter Perturbations ◽  
Robust Control System ◽  
The Stability ◽  
Sensitivity Method

It is necessary to study the stability and robustness of the anti-locked braking system (ABS) of vehicles because there are parameter perturbations and un-modeled dynamic features in the system. On the basis of the ABS model and the mixed sensitivity method, a robust control strategy for ABS is put forward and the H robust controller is designed in this paper. The simulation of the process of ABS shows that the robust control system can keep stable and is effective on decreasing the undesirable influence of the fluctuation of parameter such as load, brake performance coefficient and road condition. Furthermore, the tire slip ratio can be effectively controlled around the desired value, and the braking performance can be obviously improved.

An Investigation on Vehicle Active Suspension and Anti-Lock Braking System Coordination Control

2013 ◽  
Author(s):  
Shi-jie Liang ◽  
Xiao-kai Chen
Keyword(s):  
Ride Comfort ◽  
Fuzzy Model ◽  
Active Suspension ◽  
Software Environment ◽  
Braking Performance ◽  
The Road ◽  
Braking System ◽  
Control Scheme ◽  
Model Control ◽  
On The Road

This paper made an investigation on the coordinated control scheme of vehicle anti-lock braking system (ABS) and vehicle active suspension. The objective of this investigation is to obtain the maximum braking force on the road and to minimize the stopping distance and meanwhile maintain vehicle directional stability and maintain ride comfort. The controller was designed by using the fuzzy model control theory and was implemented under the Matlab/Simulink software environment. A 7-DOF-vehicle model was used to consider the influences of the non-linearity of tire and suspension. The simulation tests were carried out in various conditions. The action of the ABS combined with active suspension and the effects of applied suspension force on braking performances were examined. The simulation results show that for a particular vehicle there exists an optimal application of the suspension force. Compared with an ABS system without combing active suspension, the proposed control scheme can improve braking performance significantly.

Stability analysis of the anti-lock braking system with time delay

2021 ◽  
pp. 095965182110561
Author(s):  
Qing Ye ◽  
Gao Chaojun ◽  
Ruochen Wang ◽  
Chi Zhang ◽  
Yinfeng Cai
Keyword(s):  
Stability Analysis ◽  
Time Delay ◽  
Dynamic Models ◽  
Critical Time ◽  
Dynamic Structure ◽  
Braking Performance ◽  
Braking System ◽  
The Stability ◽  
Stability And Accuracy ◽  
And Control

A time delay exists between driver input and vehicle braking state response during the working process of the anti-lock braking system (ABS), and the braking performance of vehicles will be further reduced due to the delay of controllers. This paper investigates a systematic method of stability analysis for time delay ABS, and the analysis focuses on the stability and critical delay algorithm of ABS with delay time. Firstly, the dynamic structure and modelling process of ABS are briefly introduced, and PD control algorithm is adopted to improve the control performance. Then, dynamic models of ABS with time delay are derived, and the full delay stability interval and critical time delay algorithm of ABS are deduced by using the generalized Sturm criterion method. Finally, the validity of the critical delay algorithm by the proposed method and the stability and accuracy of ABS with time delay, different road conditions, vehicle speeds and control parameters are illustrated by numerical simulations, and the results show that the critical time delay algorithm of ABS can be verified under different conditions.

Simulation Analysis of Portal Crane Braking Effect with Dual-Stage Brakes under Fluctuating Wind Load

2014 ◽  
Vol 607 ◽  
pp. 268-272
Author(s):  
Guang Wei Qing ◽  
Hui Jin ◽  
Jing Bo Hu
Keyword(s):  
Simulation Analysis ◽  
Brake System ◽  
Safety Device ◽  
Braking Performance ◽  
Braking System ◽  
Dual Stage ◽  
Braking Force ◽  
Braking Process ◽  
Fluctuating Wind ◽  
Portal Crane

In order to grasp the braking effect of the portal crane after the installation of auxiliary wind safety device, the braking process of real harbor crane with dual-stage windproof braking system exposed to fluctuating wind is simulated. The effect on the crane braking performance of braking device response lag and artificially lowering working braking force is also analyzed. It is demonstrated that the dual-stage brake system is superior to the single and could improve the windproof ability when working braking force decline.

scholarly journals Modelling of a Partially Loaded Road Tanker during a Braking-in-a-Turn Maneuver

Actuators ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 45 ◽  
Author(s):  
Frank Otremba ◽  
José Romero Navarrete ◽  
Alejandro Lozano Guzmán
Keyword(s):  
Road Safety ◽  
Load Transfer ◽  
Dynamic Interaction ◽  
Performance Measure ◽  
Lateral Stability ◽  
Safety Level ◽  
Factors Associated ◽  
Braking System ◽  
Factors Influencing ◽  
Fill Level

Road safety depends on several factors associated with the vehicle, to the infrastructure, as well as to the environment and experience of vehicle drivers. Concerning the vehicle factors influencing the safety level of an infrastructure, it has been shown that the dynamic interaction between the carried liquid cargo and the vehicle influences the operational safety limits of the vehicle. A combination of vehicle and infrastructure factors converge when a vehicle carrying liquid cargo at a partial fill level performs a braking maneuver along a curved road segment. Such a maneuver involves both longitudinal and lateral load transfers that potentially affect both the braking efficiency and the lateral stability of the vehicle. In this paper, a series of models are set together to simulate the effects of a sloshing cargo on the braking efficiency and load transfer rate of a partially filled road tanker. The model assumes the superposition of the roll and pitch independent responses, while the vehicle is equipped with Anti-lock braking System brakes (ABS) in the four wheels. Results suggest that cargo sloshing can affect the performance of the vehicle on the order of 2% to 9%, as a function of the performance measure considered. A dedicated ABS system could be considered to cope with such diminished performance.

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.

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