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.

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).

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.

scholarly journals Modelling and simulation of the train brake system in low adhesion conditions

2018 ◽  
Vol 234 (3) ◽  
pp. 301-320
Author(s):  
Hamid Alturbeh ◽  
Julian Stow ◽  
Gareth Tucker ◽  
Alan Lawton
Keyword(s):  
Experimental Tests ◽  
Brake System ◽  
Rolling Stock ◽  
Dynamic Optimisation ◽  
Braking Performance ◽  
Braking System ◽  
Dry Conditions ◽  
Multiple Unit ◽  
And Control ◽  
Support Decision Making

This paper describes the current version of the Low Adhesion Braking Dynamic Optimisation for Rolling Stock (LABRADOR) simulation tool that can predict the train brake system performance and support decision-making in the design and optimisation of the braking system including wheel slide protection, sanders and the blending and control of friction and dynamic brakes in low adhesion conditions. The model has been developed in MATLAB/Simulink and is intended to mimic the braking performance of both older and newer generations of multiple unit passenger trains. LABRADOR models have been initially validated by comparing simulation results for a single car train (Class 153) and two-car train (Class 158) in dry conditions with experimental tests, for tare and crush laden vehicles. This project is supported by RSSB and a technical steering group composed of railway braking experts, suppliers and train operators and manufacturers.

Regenerative Braking System for a Pure Electric Bus

2014 ◽  
Vol 543-547 ◽  
pp. 1405-1408 ◽  
Author(s):  
Jian Wei Cai ◽  
Liang Chu ◽  
Zi Cheng Fu ◽  
Li Peng Ren
Keyword(s):  
Control Strategies ◽  
Brake System ◽  
Regenerative Braking ◽  
Braking Performance ◽  
Braking System ◽  
Electric Bus ◽  
Brake Force ◽  
Braking Control ◽  
Vehicle Test ◽  
Brake Force Distribution

A design of regenerative braking system (RBS) for a pure electric bus was presented in this paper. A design of regenerative braking system for a pure electric bus was presented in this paper The control of regenerative braking was achieved by Pneumatic ABS and improve braking energy recovery under the premise of ensure braking performance. Regenerative braking control algorithm was mainly composed of two parts for the identification of the drivers intention and the brake force distribution. The regenerative brake control model was built in the matlab/simulink environment, rapid prototyping control was achieved by Autobox and vehicle test was carried on. Result shows that the control strategies can effectively make the pneumatic brake system and motor brake system work harmoniously.

Subjective Evaluation of Braking System and Dynamics Analysis

2014 ◽  
Vol 644-650 ◽  
pp. 76-80
Author(s):  
Hsin Guan ◽  
Chun Guang Duan ◽  
Ping Ping Lu
Keyword(s):  
Subjective Evaluation ◽  
Brake System ◽  
Driving Safety ◽  
Dynamics Analysis ◽  
Braking Performance ◽  
Braking System ◽  
Design Basis ◽  
Large Numbers ◽  
Negative Phenomena

Subjective evaluation of the braking based on the people's feelings. When braking, the response of vehicle and the convenience of brake determines the driving safety and comfort. Research major vehicle company's subjective evaluation of braking system, and summarize large numbers of projects into tactile indicators, somatosensory indicators, and braking performance three evaluation projects in accordance with the people's subjective feelings. Through sorting, the loads of evaluation can be reduced when evaluation for subjective driver. To analysis of typical index by dynamics methods to find the reasons of negative phenomena, so provides the design basis of the brake system for meet the subjective feelings.

Prediction of hyperelastic material sealing pressure using experimental and numerical analyses

2019 ◽  
Vol 52 (8) ◽  
pp. 717-727
Author(s):  
T Sukumar ◽  
BR Ramesh Bapu ◽  
B Durga Prasad
Keyword(s):  
Contact Pressure ◽  
Operating Conditions ◽  
Experimental Results ◽  
Hyperelastic Material ◽  
Brake System ◽  
Test Rig ◽  
Stopping Distance ◽  
Braking System ◽  
Sealing Pressure ◽  
Fuji Film

In commercial vehicle air braking system, leakage is one of the major problems and will affect the performance of the vehicle braking in terms of brake pedal travel and stopping distance. If there is any leakage in the brake system, the vehicle stopping distance will not meet the safety regulations. One of the main reasons for braking system leakage is ineffective sealing mechanism. The majority of sealing elements used in the air brake system are O-rings, lip seals, and gaskets. This article presents an experimental procedure for measuring the sealing pressure between an O-Ring and its mating parts. The contact pressure measurement was performed in a static condition by means of an experimental test rig using Fuji film. For the sealing pressure study, a test rig was properly designed to replicate the actual operating conditions. Contact pressure was evaluated by means of Fuji film interposed between the O-ring and its mating parts. The sealing pressure tests were carried out for different clamping load conditions. The experimental results were compared with the numerical result using the finite-element analysis (FEA). A good correlation was found between the experimental and the numerical results. The outcome from the experimental results will be useful for finalizing the hyperelastic material models, which are input to the FEA for future reference.

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.

The Development of a Hybrid Antilock Braking System Using Magnetorheological Brake

2013 ◽  
Vol 479-480 ◽  
pp. 622-626 ◽  
Author(s):  
Yao Jung Shiao ◽  
Quang Anh Nguyen ◽  
Jhe Wei Lin
Keyword(s):  
Fast Response ◽  
Simulation Software ◽  
Brake System ◽  
Braking Performance ◽  
Braking System ◽  
Actual Application ◽  
Antilock Braking System ◽  
Antilock Braking ◽  
Driving Stability ◽  
Multiple Poles

This paper proposes a novel hybrid antilock braking system (ABS) with the combination of auxiliary brake and a magnetorheological (MR) brake with multiple poles. The operation concept of this MR brake is different to conventional MR brake. Its output torque proves the ability to be used in motorcycle brake system. In concept, a fast-response MR brake replaces existed hydraulic brake system, or works as an auxiliary brake, the brake performance can be effectively improved and driving stability can be guaranteed. Simulation model of the MR brake has been built and its braking performance for using on a motorcycle was verified. After that, a motorcycle simulation software was employed to validate the hybrid ABS system under appropriated working condition. The results confirm its feasibility for actual application as a hybrid ABS system.

Study on Control of Hydraulic Disc Brake System Based on PWM High Speed On/Off Valve

2011 ◽  
Vol 69 ◽  
pp. 28-32 ◽  
Author(s):  
Yu Wang ◽  
Li Lin
Keyword(s):  
High Speed ◽  
Oil Field ◽  
Brake System ◽  
Disc Brake ◽  
Constant Weight ◽  
Braking Performance ◽  
Braking System ◽  
Drilling System ◽  
Automation Control ◽  
Control Technologies

With the development of oil exploration and electronics technology, the automation control technologies of hydraulic disc brake system (HDBS) have become more and more widely used. After analysis the braking performance of HDBS, The optimizing schemes for hydraulic disc brake, such as PWM high speed on/off valve and pressure switch are used in the constant weight auto-drilling system. It has been tested successfully both on the integrated braking facility in lab and in the oil field. And it proved that the PWM valve have great prospects on the braking system.

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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