NDLI: Mr-brake with permanent magnet as passive actuator for haptics

Content Provider	IEEE Xplore Digital Library
Author	Erol, O. Gurocak, H.
Copyright Year	2013
Description	Author affiliation: Sch. of Eng. & Comput. Sci., Washington State Univ., Vancouver, WA, USA (Erol, O.; Gurocak, H.)
Abstract	In haptics applications, fast, stable and crisp force responses are desired. Magnetorheological (MR) brakes are viable actuators for haptics since they provide high torque-to-volume ratios with fast response. However, they tend to be rather large and use high current inputs. The actuator size is mainly affected by two factors: (1) design of the magnetic flux path, and (2) the number of coil turns inside the device. To address these issues, we developed a new MR-brake combining serpentine flux path design and a permanent magnet. The new design also provides a fail-safe feature with the help of the permanent magnet while reducing the actuator size. To the best of our knowledge, this is the first such rotary MR-brake. The design was optimized using the Taguchi optimization method. A prototype was fabricated with 45.5 mm diameter, 63.5 mm length and 2.0 Nm maximum torque output. The prototype was tested to assess its effectiveness as a 1 degree-of-freedom haptic device in virtual wall collision. The smaller new MR-brake provided a crisp torque response and simulated the virtual wall collision successfully.
Starting Page	413
Ending Page	418
File Size	2877140
Page Count	6
File Format	PDF
ISBN	9781479900879
e-ISBN	9781479900886
DOI	10.1109/WHC.2013.6548444
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-04-14
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils permanent magnet Magnetic flux Actuators Torque force feedback virtual reality Permanent magnets Haptic interfaces magnetorheological MR fluid Fluids haptics VR MR-brake
Content Type	Text
Resource Type	Article

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