Topic
Magnetorheological fluid
About: Magnetorheological fluid is a research topic. Over the lifetime, 8538 publications have been published within this topic receiving 131502 citations. The topic is also known as: MRF & MR fluid.
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TL;DR: In this paper, the effect of applied magnetic fields on the rheological, magnetic and thermophysical properties of magnetorheological suspensions (MRS) is considered, and an invariant dependence of viscosity is obtained, the effects of mechanical memory and reversing of shear stresses in a rotating field are revealed.
55 citations
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TL;DR: This study has developed a compact magnetorheological fluid clutch (CMRFC) for human-friendly actuators and discusses experimental results on the basic characteristics of these devices.
Abstract: (2011). Development of a Compact Magnetorheological Fluid Clutch for Human-Friendly Actuator. Advanced Robotics: Vol. 25, No. 9-10, pp. 1362-1362.
55 citations
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TL;DR: In this article, the non-dimensional analysis of adaptive magnetorheological energy absorbers (MREAs) for drop-induced shock mitigation was performed using a single-degree-of-freedom system with an MREA.
Abstract: This study addresses the non-dimensional analysis of adaptive magnetorheological energy absorbers (MREAs) for drop-induced shock mitigation. The control objective to ensure that the payload mass comes to rest at the end of the available stroke of the MREA, that is, a ‘soft landing.’ The governing equation of motion of a single-degree-of-freedom system with an MREA was derived. The Bingham number was defined and its effect on the system response was examined. A comprehensive non-dimensional analysis was conducted using non-dimensional stroke, velocity and acceleration, where Bingham number and time constant were key parameters. An optimal Bingham number - based on drop velocity, payload mass, and passive damping - minimized the drop-induced shock loads transmitted to the payload by utilizing maximum damper stroke.
55 citations
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TL;DR: In this paper, the feasibility of using magnetorheological fluid-based dampers for lag damping augmentation in helicopters is explored and two different control schemes are presented-namely the On-Off scheme and the Feedback Linearization scheme.
Abstract: This paper explores the feasibility of using Magnetorheological (MR) fluid-based dampers for lag damping augmentation in helicopters. An MR damper model is integrated with a rotor aeromechanical model. Two different control schemes are presented-namely the On-Off scheme and the Feedback Linearization scheme. In the On-Off scheme, two criteria are used to obtain equivalent linear damping for the nonlinear MR damper as a function of the size of perturbation and the applied field. The Feedback Linearization scheme uses a feedback controller to linearize the force output of the MR damper. The two control schemes are compared for lag transient response in ground resonance and their ability to reduce periodic damper loads in forward flight. It is shown that an MR damper of a size comparable to an elastomeric damper can provide sufficient damping for ground resonance stabilization and can significantly reduce periodic damper loads with ajudicious choice of operation scheme.
55 citations
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TL;DR: In this paper, the magnetic field dependence of the current flowing through a magnetoresistor, say I ǫ = I (H ) U, is measured for constant voltages.
55 citations