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Showing 1 to 20 of 25 for “"MR fluid"”.
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Analytical and Numerical Approaches on the Stiffness of Magnetorheological Fluid Filled Spring
… spring filled with magnetorheological (MR) fluid to achieve controllable stiffness. The hollow spring filled with MR fluid is subjected to a controlled magnetic field in order to change the viscosity of the MR fluid and thereby to change the overall stiffness of the spring. MR fluid is …
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Design and Characterization of Tunable Magneto-Rheological Fluid-Elastic Mounts
… to capture the uniqueness of magnetorheological (MR) fluid's variable viscosity rate, and to physically alter the damping and stiffness when used inside an elastomeric mount. Apparent variable viscosity or rheology of the MR fluid has dependency on the application of a magnetic field. Therefore, …
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Magneto-rheological fluid orthosis for suppressing tremor
… which are made of Magneto-Rheological (MR) fluid that can dynamically alter its viscosity under magnetic field. The wearable tremor suppressing orthosis needs several conditions. It should be safe, light weight, simple and small in structure, and easily attachable. An MR fluid orthosis …
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Behavior of Magneto-Rheological Fluids Subject to Impact and Shock Loading
… the design of controllable magnetorheological (MR) fluid devices have focused heavily on low velocity and low frequency applications. The extensive work in this area has led to a good understanding of MR fluid properties at low velocities and frequencies. However, the issues concerning MR fluid …
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Development of laboratory class experiment to characterize magneto-rheological fluid
… that characterizes magneto-rheological (MR) fluid for an MIT Mechanical Engineering laboratory class by charting the fluid's yield stress versus magnetic field strength. The apparatus consists of a cantilevered beam that is damped using MR fluid, through which a magnetic field is varied. …
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Characterizing the Behavior of Magnetorheological Fluids at High Velocities and High Shear Rates
Magnetorheological (MR) fluids offer solutions to many engineering challenges. The success of MR fluid is apparent in many disciplines, ranging from the automotive and civil engineering communities to the biomedical engineering community. This well documented success of MR fluids continues to …
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Magnetic fluid flow phenomena in DC and rotating magnetic fields
An investigation of magnetic fluid experiments and analysis is presented in three parts: a study of magnetic field induced torques in magnetorheological fluids, a characterization and quantitative measurement of properties relating to the transition of a ferrofluid drop from a continuous phase into …
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Characterisation and Modelling for Elastomeric and Gel-Like Magnetorheological Materials
Magnetorheological (MR) material is an aspiring branch of smart material. It can change its mechanical properties rapidly and reversibly subjected to an externally applied magnetic field, so-called MR effect. Due to the sensitivity to magnetic field and the versatility in physical states, i.e., …
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Vibration control using an adaptive tuned magneto-rheological fluid vibration absorber
… is to change the stiffness in real-time. Tunable fluids such asMagneto-Rheological (MR) fluids, whose properties can be controlled by a magnetic field,may be used to address this challenge.<br/><br/>The subject of this thesis is an ATVA exploiting the changeable properties of MR fluidsin the …
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Design and Development of a Squeeze-Mode Rheometer for Evaluating Magneto-Rheological Fluids
… understand the behavior of magnetorheological (MR) fluids operated in the non-conventional squeeze mode through the use of a custom designed rheometer. Squeeze mode is the least understood of the three operational modes of MR fluid and thus its potential has yet to be realized in practical …
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A controllably adhesive climbing robot using magnetorheological fluid
… the novel adhesive effects of magnetorheological fluid for use in climbing robotics were experimentally measured and compared to existing cohesive failure fluid models of yield stress adhesion. These models were found to correlate with experimental results at yield stresses below 1.12 kPa. MR …
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Modeling, Analysis and Testing of a Semi-Active Control System for Landing Gear Applications
… dampers. Controllable dampers can use a fluid with controllable properties, such as Magneto - Rheological fluid (MR fluid), or control the damping force by changing orifice size. For this project, controllable dampers were created using MR fluid. When exposed to a magnetic fluid, the …
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Design and optimization of micropumps using electrorheological and magnetorheological fluids
… electrorheological (ER) and magnetorheological (MR) fluids as the hydraulic fluids. This thesis presents two methods: one is a dynamic sealing method to be applied on current micro-scale gear pumps using MR fluids, and the other is a novel design method of micropumps using ER fluids. Using MR …
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The behaviour of magnetorheological fluids in squeeze mode
Magnetorheological (MR) fluids possess rheological properties, which can be changed in a controlled way. These rheological changes are reversible and dependent on the strength of an excitation magnetic field. MR fluids have potentially beneficial applications when placed in various applied loading …
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Smart Dampers Applied to Upper-Limb Rehabilitation Training Systems
… these dampers is the use of magnetorheological (MR) fluids which can exhibit dramatic changes in their rheological properties, such as yield stress, when subjected to external magnetic fields. These fast and reversible fluid rheological changes would permit the smart damper to provide the …
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Development of Novel Compressible Magnetorheological Fluid (CMRF)
A novel of compressible magnetorheological fluid (CMRF) has been synthesized from modified silicone oil, composite polyurethane-microspheres additives, and surface coated iron particles. The CMRF has been designed to replace the spring in a damper system. Thus, the fluid has to provide an elastic …
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A Study on the Dynamic Characterization of a Tunable Magneto-Rheological Fluid-Elastic Mount in Squeeze Mode Vibration
… for a squeeze mode Magneto-Rheological (MR) Fluid-Elastic mount. MR fluid's variable viscosity rate is advantageously used to develop a mount capable of mitigating input vibrations of varying magnitudes and frequencies depending on electromagnetic flux. Various mechanical components are …
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Finite Element Analysis Based Modeling of Magneto Rheological Dampers
… built to analyze and examine a 2-D axisymmetric MR damper. This model has been validated with the experimental data. The results obtained in this thesis will help designers to create more efficient and reliable MR dampers. We can create some design analysis to change the shape of the piston in …
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Magnetorheological fluids for extreme environments : stronger, lighter, hotter
… controllable properties of magnetorheological (MR) fluids offer reliable and efficient actuation means to a number of far-ranging engineering applications. In this thesis we are motivated by the applications of MR fluids in oil & gas exploration and production. These applications also bring …
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Magneto-Rheological Fluid Device as Artificial Feel Force System on Aircraft Control Stick
… A novel feel system using magneto-rheological (MR) fluid is constructed to precisely control the shear stress under the magnetic field. To validate the functionality of the MR artificial feel system, the final system is fabricated and multiple tests are performed to acquire force-velocity …
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