IEEE Transactions on Haptics

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From the January-March 2017 issue

Development and Experimental Validation of a Haptic Compass Based on Asymmetric Torque Stimuli

By Jean-Philippe Choiniere and Clement Gosselin

Free Featured ArticleThis paper presents the design, control, and experimental validation of a haptic compass, designed as a guiding device for all environments. The proposed device uses the principle of asymmetric torques. Its design is based on a direct drive motor and a pre-calibrated open-loop control, which allows the generation of stimuli in a wide range of frequencies. User studies are presented and show optimum effectiveness in the frequency range 5-15 $\mathrm{\mathrm{Hz}\;a}$ nd for torques over $40\; \mathrm{m}\mathrm{N}\mathrm{m}$ . The use of a haptic feedback proportional to the angle error is then shown to significantly improve the results. An experimental validation by a group of‘ subjects with the portable device using these stimuli is reported. The results show that all subjects met all route objectives with small lateral deviations (avg. $\mathrm{0.39\;\mathrm{m}}$ ).

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