MR Based Brake-by-Wire System with Self-Energizing Capability

2014 ◽  
Vol 936 ◽  
pp. 2087-2093
Author(s):  
Xu Hui Liu ◽  
Liang Yao Yu ◽  
Liang Xu Ma
Keyword(s):  
Research Work ◽  
Brake System ◽  
Electromechanical Actuators ◽  
Brake Torque ◽  
Mr Fluids ◽  
Single Disk ◽  
Torque Analysis ◽  
Magneto Rheological ◽  
Wire System ◽  
Automotive Brake

Brake-by-wire system is a new concept of brake system using electromechanical actuators instead of conventional hydraulic actuators. It is more compact, more efficient and responses faster than traditional brake systems. Magneto-rheological (MR) fluid is widely used due to its outstanding properties. In this paper, an MR based Brake-by-wire system with self-energizing capability were proposed and designed. It combined a typical single-disk-type MR brake with a wedge mechanism for self-energizing purpose. According to the torque analysis of the proposed MR brakes, the brake torque was significantly amplified. This research work presented a promising brake actuator, which allows MR fluids to be applied in automotive Brake-by-wire systems.

MR Based Brake-by-Wire System With Self-Energizing and Brake Energy Harvesting Capability

2014 ◽  
Author(s):  
Liangyao Yu ◽  
Xuhui Liu ◽  
Liangxu Ma ◽  
Lei Zuo ◽  
Jian Song
Keyword(s):  
Energy Harvesting ◽  
Output Power ◽  
Low Voltage ◽  
Vehicle Speed ◽  
Mr Fluid ◽  
Damping Control ◽  
Single Disk ◽  
Torque Analysis ◽  
Magneto Rheological ◽  
Wire System

Brake-by-wire system is a more compact, more efficient brake system using electromechanical actuators instead of conventional hydraulic actuators. Magneto-rheological (MR) fluid is widely used in damping control due to its outstanding controllable properties. In this paper, an MR based Brake-by-wire system with self-energizing and brake energy harvesting capability was proposed and designed. It combined a typical single-disk-type MR brake with a wedge mechanism for self-energizing purpose, and a generator is employed to conduct regenerative braking and harvest brake energy. The MR brake and generator are located at the inner side of the wheel rim and coupled by compact linkage and axle mechanism. According to the torque analysis of the proposed MR brake, the brake torque was significantly amplified, which means MR fluid can be applied in automotive Brake-by-Wire system with less power consumption. Meanwhile, about 46W output power of the generator can be achieved when braking at an initial vehicle speed of 50km/h. Using a DC/DC convertor, the output power can be used to power the MR brake control circuit or other in-vehicle electronic devices, or charge the on-board low-voltage battery. Simulation results are given according to the proposed design.

scholarly journals Brake torque analysis of fully mechanical parking brake system: Theoretical and experimental approach

2018 ◽  
Vol 19 (1) ◽  
pp. 37-49 ◽  
Author(s):  
Mohd Razmi-Ishak ◽  
◽  
Abd Rahim Abu-Bakar ◽  
Ali Belhocine ◽  
Jamaludin Mohd-Taib ◽  
...  
Keyword(s):  
Experimental Approach ◽  
Brake System ◽  
Brake Torque ◽  
Parking Brake ◽  
Torque Analysis

Brake torque analysis of fully mechanical parking brake system: Theoretical and experimental approach

Measurement ◽  
2016 ◽  
Vol 94 ◽  
pp. 487-497 ◽  
Author(s):  
Mohd Razmi Ishak ◽  
Abd Rahim Abu Bakar ◽  
Ali Belhocine ◽  
Jamaludin Mohd Taib ◽  
Wan Zaidi Wan Omar
Keyword(s):  
Experimental Approach ◽  
Brake System ◽  
Brake Torque ◽  
Parking Brake ◽  
Torque Analysis

Parametric Study of Damping Characteristics of Magneto-Rheological Damper: Mathematical and Experimental Approach

2020 ◽  
Vol 15 (3) ◽  
pp. 37-48
Author(s):  
Zubair Rashid Wani ◽  
Manzoor Ahmad Tantray
Keyword(s):  
Structural Control ◽  
Research Work ◽  
Testing Machine ◽  
Input Voltage ◽  
Damping Coefficient ◽  
Control Technique ◽  
Damping Force ◽  
Active Devices ◽  
Active Structural Control ◽  
Magneto Rheological

The present research work is a part of a project was a semi-active structural control technique using magneto-rheological damper has to be performed. Magneto-rheological dampers are an innovative class of semi-active devices that mesh well with the demands and constraints of seismic applications; this includes having very low power requirements and adaptability. A small stroke magneto-rheological damper was mathematically simulated and experimentally tested. The damper was subjected to periodic excitations of different amplitudes and frequencies at varying voltage. The damper was mathematically modeled using parametric Modified Bouc-Wen model of magneto-rheological damper in MATLAB/SIMULINK and the parameters of the model were set as per the prototype available. The variation of mechanical properties of magneto-rheological damper like damping coefficient and damping force with a change in amplitude, frequency and voltage were experimentally verified on INSTRON 8800 testing machine. It was observed that damping force produced by the damper depended on the frequency as well, in addition to the input voltage and amplitude of the excitation. While the damping coefficient (c) is independent of the frequency of excitation it varies with the amplitude of excitation and input voltage. The variation of the damping coefficient with amplitude and input voltage is linear and quadratic respectively. More ever the mathematical model simulated in MATLAB was in agreement with the experimental results obtained.

scholarly journals Investigation of a Haptic Actuator Made with Magneto-Rheological Fluids for Haptic Shoes Applications

Actuators ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 5
Author(s):  
Yong Hae Heo ◽  
Sangkyu Byeon ◽  
Tae-Hoon Kim ◽  
In-Ho Yun ◽  
Jin Ryong Kim ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Quantitative Evaluation ◽  
Material Properties ◽  
Closed Loop ◽  
Input Current ◽  
Solenoid Coil ◽  
Resistive Force ◽  
Mr Fluids ◽  
Multiple Operation ◽  
Magneto Rheological

This paper presents a magneto-rheological (MR) actuator that can be easily inserted into haptic shoes and can haptically simulate the material properties of the ground. To increase the resistive force of the proposed actuator, we designed a movable piston having multiple operation modes of MR fluids. Further, the design of a solenoid coil was optimized to maximize the resistive force in a limited-sized MR actuator. Simulations were conducted to predict the actuation performance and to show that the magnetic flux flows well by forming a closed loop in the proposed actuator. The quantitative evaluation of the proposed actuator was investigated by measuring the resistive force as a function of the input current and its pressed depth. From the result, we found that the proposed actuator can create over 600 N by adjusting the input current.

Structural Optimization Design of MR Fluid Clutch

2007 ◽  
Vol 546-549 ◽  
pp. 1673-1676 ◽  
Author(s):  
Wei Jia Meng ◽  
Zhan Wen Huang ◽  
Yan Ju Liu ◽  
Xiao Rong Wu ◽  
Yi Sun
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Design ◽  
Element Analysis ◽  
Mr Fluids ◽  
Magneto Rheological ◽  
Ferromagnetic Fluids ◽  
Ferromagnetic Particles

Magnetorheological (MR) fluids are suspensions of micron sized ferromagnetic particles dispersed in varying proportions of a variety of non-ferromagnetic fluids. MR fluids exhibit rapid, reversible and significant changes in their rheological (mechanical) properties while subjected to an external magnetic field. In this paper, a double-plate magneto-rheological fluid (MRF) clutch with controllable torque output have been designed. Electromagnetic finite element analysis is used to optimize the design of the clutch by using the commercial FEA software ANSYS.

Thermal and tribological performance of graphite flake based magnetorheological fluid under shear mode clutch

2021 ◽  
pp. 1-24
Author(s):  
Manish Kumar Thakur ◽  
Chiranjit Sarkar
Keyword(s):  
Research Work ◽  
Magnetorheological Fluid ◽  
Tribological Performance ◽  
Graphite Flake ◽  
Shear Mode ◽  
Torque Sensor ◽  
Test Rig ◽  
Mr Fluid ◽  
Mr Fluids ◽  
Torque Transmission

Abstract In this research work, graphite flake has been used as an additive in magnetorheological (MR) fluid to improve its thermal and tribological performance. MR fluids with varying amounts of graphite flakes (0.5, 1, 2, 3, 4, and 5 wt%) are prepared to show effective thermal and tribological performance. A test rig is developed with a DC motor, torque sensor, and MR clutch operated in a shear mode to test the torque transmission. Results show the lubrication effects of graphite flakes in MR fluid. Torque transmission is improved in on-state and off-state using graphite flakes based MR fluid as compared to conventional MR fluid. Heating of MR clutch is also reduced with the graphite flakes based MR fluid. Wear marks and damages are decreased significantly with the increased amount of graphite flakes as found in surface roughness tests. SEM and EDS are used to characterize the worn surfaces. This research provides information about the effectiveness of graphite flakes in the MR clutch to improve the device's performance.

A Novel Safety Brake System Based on Magneto-Rheological Fluids

2015 ◽  
Author(s):  
Dongwon Yun ◽  
Jeong-Hoi Koo ◽  
Sunghwi Lee ◽  
Byungin Kim
Keyword(s):  
Permanent Magnets ◽  
Cost Effective ◽  
Brake System ◽  
Rotating Systems ◽  
External Power Source ◽  
Rotary Disk ◽  
Braking Torque ◽  
Speed Regulator ◽  
Magneto Rheological ◽  
Critical Rotation Speed

This paper presents a novel Magentorheological (MR) brake with permanent magnets. The proposed MR brake can generate a braking torque at a critical rotation speed without an external power source, sensors, or controllers, making it simple and cost-effective device. The brake system consists of a rotary disk, permanent magnets, springs and MR fluid. Permanent magnets are attached to the rotary disk via springs, and they move outward through grooves with two different gap distances along the radial direction of the stator due to centrifugal force. Thus, the position of the magnets is dependent on the spin speed, and it can determine the magnetic fields applied to MR fluids. Proper design of the stator geometry gives the system unique torque characteristics. To show the performance of an MR brake system, the electromagnetic characteristics of the system are analyzed, and the torques generated by the brake are calculated using the result of the electromagnetic analysis. After the simulation study, a prototype brake system is constructed and its performance is experimentally evaluated. The results demonstrate the feasibility of the proposed MR brake as a speed regulator in rotating systems.

PREPARATION AND ABRASION PROPERTIES OF MAGNETO-RHEOLOGICAL FLUID OF DISPERSED SILICA-COATED IRON

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1121-1127 ◽  
Author(s):  
A. SHIBAYAMA ◽  
T. OTOMO ◽  
Y. AKAGAMI ◽  
K. SHIMADA ◽  
T. FUJITA
Keyword(s):  
Carbonyl Iron ◽  
Spherical Particles ◽  
Fluid Viscosity ◽  
Iron Particles ◽  
Mr Fluid ◽  
Abrasion Test ◽  
Silicon Oil ◽  
Mr Fluids ◽  
Transmission Oil ◽  
Magneto Rheological

In this study, a magneto-rheological fluid dispersed by silica-coated iron was developed and its properties such as fluid viscosity (shear stress or shear rate) and abrasion were investigated. The metallic iron coated by silica dispersed in magneto-rheological fluid was prepared by H 2 reducing of precipitated magnetite ( Fe 3 O 4). Then, the magneto-rheological fluid (MR fluid) for the seal was prepared with silica-coated iron or carbonyl iron (HQ type; diameter of 1.6-1.9 10-6m) and two solvent oils i.e. silicon oil (SH200cv, 10000cSt) and CVT oil (T-CVTF, automobile transmission oil). It was observed that the MR fluid viscosity of CVT oil with HQ particles is lower in every fluid condition. Furthermore, the surface roughness of polyvinyl plate after abrasion test for MR fluid with silica coated iron and CVT oil as solvent was higher compared to the other types of MR fluids. The results indicated that carbonyl iron (spherical particles) and silica-coated iron particles dispersed in silicon oil are feasible to be used where the low abrasion in mechanics is required.

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