The Problem:
Magnetorheological fluids (MRFs) are a type of smart or controllable fluid that can change their flow-related properties in response to an applied magnetic field. MRFs have significant potential as absorbers and dissipaters for mitigating earthquake damage, in prosthetic applications, and in robotics. However, their widespread use in these markets has been slowed by the substantial energy demands of the material. The primary issues with current MRF technology include energy intensive demands for magnetic fields, temperature sensitivity, and the need to integrate complex control systems to optimize performance while maintaining power constraints.
The Solution:
Researchers at the University of Alabama have developed fluid additives, specifically emulsion droplets, that improve MRF performance increasing yield stress, without additional power. This technology works well to reduce the magnetic field requirement, and thus the power requirement, of MRF energy dampers that can be used to support large structures as well as human prosthetic movement.
Benefits: