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Showing 1 to 20 of 33 for “"Magneto-Rheological"”.
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Innovative Designs for Magneto-Rheological Dampers
Magnetorheological dampers, or as they are more commonly called, MR dampers, are being developed for a wide variety of applications where controllable damping is desired. These applications include dampers for automobiles, heavy trucks, bicycles, prosthetic limbs, gun recoil systems, and possibly …
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Magneto-rheological fluid orthosis for suppressing tremor
… concept of "smart structures" 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. …
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Magneto-Rheological Dampers for Super-sport Motorcycle Applications
… shown for a relatively old technology called magneto-rheological fluids, or MR fluids. Multiple types of devices have been designed to implement this versatile fluid, including linear dampers, clutches, work-piece fixtures, and polishing machines. The devices have been used in automobiles, …
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Finite Element Analysis Based Modeling of Magneto Rheological Dampers
… density contour before and after reaching the rheological saturation. By increasing the current, the color spectrum of the magnetic flux density will shift from the MR fluid gap to the piston centerline. In chapter 5, we provided a reasonably good amount of force in model 4 at 1.4 Amps, but it …
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Design and Characterization of Tunable Magneto-Rheological Fluid-Elastic Mounts
… mounts sets out 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 …
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Nano-materials for novel magneto-rheological liquids and nano-fluids
Introduction: Nanotechnology, in its many forms, has evolved as a forefront of the global scientific and technological frontier. Materials once disregarded as very small dust or particulate impurities twenty years ago, are today, the focus of intensely popularized investigation. New materials have …
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Development of laboratory class experiment to characterize magneto-rheological fluid
… apparatus has been developed 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 …
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Experimental Evaluation of Semiactive Magneto-Rheological Suspensions for Passenger Vehicles
… of a single vehicle suspension incorporating a magneto-rheological (MR) damper. A full-scale two-degree-of-freedom (2DOF) quarter-car test apparatus has been constructed at the Advanced Vehicle Dynamics Lab at Virginia Tech to evaluate the response of a vehicle suspension under the different …
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Vibration control using an adaptive tuned magneto-rheological fluid vibration absorber
… 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 pre-yield state. …
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Behavior of Magneto-Rheological Fluids Subject to Impact and Shock Loading
Investigations on 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 …
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Design of Adaptive Vibration Control Systems with Applicaion to Magneto-Rheological Dampers
… as those used in vehicles, employing nonlinear magneto-rheological (MR) dampers that are controlled to provide improved vibration isolation. Magneto-rheological dampers use a novel class of smart fluid whose apparent viscosity changes as it is exposed to a magnetic field. The developed adaptive …
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Magneto-Rheological Fluid Device as Artificial Feel Force System on Aircraft Control Stick
… feel force system. 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 …
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Design and Development of a Squeeze-Mode Rheometer for Evaluating Magneto-Rheological Fluids
… study aims to better 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 …
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Using Magneto-Rheological Dampers in Semiactive Tuned Vibration Absorbers to Control Structural Vibrations
… The semiactive TVA in this study includes a Magneto-Rheological (MR) damper that is used as a controllable damping element, for providing the real-time adjustability that is needed for improving the TVA performance. This study is conducted in two phases. The first phase provides a numerical …
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Application of Magneto-Rheological Dampers in Tuned Mass Dampers for Floor Vibration Control
… of tuned-mass-dampers (TMD) using semi-active magneto-rheological (MR) dampers to mitigate annoying floor vibrations. Annoying floor vibration is becoming more common in today's building structures since building materials have become stronger and lighter; the advent of computers has resulted …
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Design, Development, and Evaluation of Customized Electronics for Controlling a 5-DOF Magneto-Rheological Actuator Collaborative Robot
In recent years, Magneto-Rheological (MR) fluids has been used in various fields such as robotics, automotive, aerospace, etc. The most common use of the MR fluids is within a clutch-like mechanism, namely an MR clutch. When mechanical input is coupled to the input part of the MR clutch, the MR …
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Design and optimization of a play-free rotary magneto-rheological fluid brake for enhanced performance and durability
This study investigates the performance and durability of the Össur NAVii knee prosthetic through the optimization of spline geometry and the evaluation of various material compositions under accelerated aging conditions. The research focuses on the impact of an involute spline profile and the …
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A Study on the Dynamic Characterization of a Tunable Magneto-Rheological Fluid-Elastic Mount in Squeeze Mode Vibration
… and dynamic characterization 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 …
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An Investigation of the Effectiveness of Skyhook Suspensions for Controlling Roll Dynamics of Sport Utility Vehicles Using Magneto-Rheological Dampers
… suspension system comprised of four controllable magneto-rheological dampers, associated sensors, and controller. There are three distinct phases in this investigation, the first of which is a numerical investigation performed on a four-degree-of-freedom vehicle roll-plane model. The model is …
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