Haptic Actuator Based on Magnetoactive Polymers
H. Böse, W. Hartmann, J. Ehrlich
Fraunhofer ISC, Würzburg, Germany
A new haptic actuator based on magnetoactive polymers (MAP) and hydraulic force transmission is described. It consists of a magnetic circuit with inner and outer yokes having cylindrical symmetry and a coil which generates the magnetic field. The haptic actuation effect is caused by a disk of MAP material which is attracted by the inner yoke of the magnetic circuit when the electromagnet is activated. The deformation of the MAP disk pushes a hydraulic liquid through a channel in the inner yoke and bulges a passive elastomer membrane at the other side of the actuator, which can be perceived with a finger touching the membrane. A demonstrator of the haptic MAP device was designed, the magnetic circuit was simulated and the device was manufactured and tested. The maximum displacement of the passive membrane in the activated state was measured as nearly 1,5
mm. The response time of the activation and deactivation of the actuator was determined as about 10 ms.
ACTUATOR 2016 Manuscript C1.4
Publication date: 01/06/2016
Manuscript C1.4published in Conference Proceedings ACTUATOR 2016
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