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, a magnetorheological shear-stiffening elastomer (MSTE) was prepared by dispersing carbonyl iron particles (CIPs), which was synthesized by co-polymerization of Shear-Stiffening Gel (STG) and methyl vinyl silicone rubber (VMQ).
50 citations
28 Jun 2002
TL;DR: In this paper, a radial double-plate magneto-rheological fluid (MRF) clutch was designed and characterized to produce high controllable torques by adjusting the applied magnetic field.
Abstract: This study focuses on the design and characterization of a radial double-plate magneto-rheological fluid (MRF) clutch. The clutch's torque output can be controlled by adjusting the applied magnetic field. Electromagnetic finite element analysis (FEA) is performed to design and optimize the clutch. The shear stress distribution in MRF between the plates is theoretically predicted using the magnetic flux density distribution evaluated from the FEA. The output torque of the clutch is derived by using the Bingham plastic constitutive model. The output torque values are recorded for different input velocities and applied magnetic fields, and they are compared with the theoretical results. It was demonstrated that the clutch is capable of producing high controllable torques.
50 citations
TL;DR: In this paper, a fiber Bragg grating (FBG) array immersed in magnetorheological (MR) fluid was used for simultaneous assessment of magnetic field intensity and position.
50 citations
TL;DR: In this article, sliding mode control (SMC) is applied in lieu of the LQG formulation to the benchmark bridge problem, and the performance and robustness of the SMC-based semiactive control system using magnetorheological (MR) dampers are investigated through a series of numerical simulations, and it is confirmed that SMC/MR can be very effectively applied to the baseline bridge, subjected to a wide range of seismic loading conditions.
Abstract: The working group on bridge control within the ASCE Committee on Structural Control recently initiated a first-generation benchmark problem addressing the control of a cable-stayed bridge subjected to seismic excitation. Previous research examined the applicability of a LQG-based semiactive control system using magnetorheological (MR) dampers to reduce the structural response of the benchmark bridge and confirmed the capability of the MR damper-based system for seismic response reduction. In this paper, sliding mode control (SMC) is applied in lieu of the LQG formulation to the benchmark bridge problem. The performance and robustness of the SMC-based semiactive control system using MR dampers (SMC/MR) is investigated through a series of numerical simulations, and it is confirmed that SMC/MR can be very effectively applied to the benchmark cable-stayed bridge, subjected to a wide range of seismic loading conditions.
49 citations
TL;DR: In this article, a cylindrical type of magnetorheological (MR) seat damper is manufactured and its field-dependant damping forces are experimentally evaluated, which is then incorporated with a full-vehicle model in which conventional passive dampers are installed for primary and cabin suspension.
Abstract: This paper presents vibration control of a commercial vehicle utilising a magnetorheological (MR) seat damper. A cylindrical type of MR seat damper is manufactured and its field-dependant damping forces are experimentally evaluated. The MR seat damper is then incorporated with a full-vehicle model in which conventional passive dampers are installed for primary and cabin suspension, respectively. After formulating the governing equations of motion of the full-vehicle model, a semi-active skyhook controller is realised by adopting a hardware-in-the-loop-simulation (HILS) methodology. Control responses such as acceleration at the driver's seat are evaluated under both bump and random road conditions.
49 citations