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Journal Articles
Journal Articles
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Journal Articles
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LRA motors and schematic: ( a ) LRA with/without housing and ( b ) LRA cros...
Published Online: March 20, 2023
Fig. 1 LRA motors and schematic: ( a ) LRA with/without housing and ( b ) LRA cross section illustration More
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Measured oscillation frequencies of an LRA at different spring elongation p...
Published Online: March 20, 2023
Fig. 2 Measured oscillation frequencies of an LRA at different spring elongation positions More
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LRA schematic of coil (black rectangle), spring, and mass (gray rectangle)
Published Online: March 20, 2023
Fig. 3 LRA schematic of coil (black rectangle), spring, and mass (gray rectangle) More
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Electromagnetic model: magnetic force imparted to the mass as a function of...
Published Online: March 20, 2023
Fig. 4 Electromagnetic model: magnetic force imparted to the mass as a function of normalized spring elongation ( δ ) for different normalized mass offset positions ( ρ ) More
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LRA in force fields with various directions and gradients: ( a ) homogeneou...
Published Online: March 20, 2023
Fig. 5 LRA in force fields with various directions and gradients: ( a ) homogeneous field, ( b )field with positive gradient, ( c ) field with negative gradient, ( d ) field with positive gradient, negative direction, and ( e ) field with negative gradient, negative direction More
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Normalized natural frequency for     ρ  =  0.2     as a function of     δ  ...
Published Online: March 20, 2023
Fig. 6 Normalized natural frequency for ρ = 0.2 as a function of δ ¯ : this plot shows how the actual natural frequency of the LRA can vary with equilibrium position. The six black dots correspond to the six example LRA configurations illustrated in Fig. 7 . More
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Example LRA configurations: black bar represents the coil. Gray bar represe...
Published Online: March 20, 2023
Fig. 7 Example LRA configurations: black bar represents the coil. Gray bar represents the mass. Dotted line represents the position of the mass when the spring is unstretched. More
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Normalized natural frequency for     ρ  =  0.2     as a function of     V  ...
Published Online: March 20, 2023
Fig. 8 Normalized natural frequency for ρ = 0.2 as a function of V ¯ : This plot shows how the actual natural frequency of the LRA can vary with steady-state voltage More
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Acceleration response from LRA. Response over entire 2-s duration shown in ...
Published Online: March 20, 2023
Fig. 12 Acceleration response from LRA. Response over entire 2-s duration shown in ( a ). Response between t  = 0.38 and t  = 0.46 shown in ( b ). ( a ) LRA acceleration response. ( b ) LRA acceleration response to voltage step from 66% to 100% of maximum voltage. More
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Experimental and model LRA frequencies across a range of equilibrium points...
Published Online: March 20, 2023
Fig. 13 Experimental and model LRA frequencies across a range of equilibrium points: ( a ) LRA effective frequency—experimental results and ( b ) normalized natural frequency for ρ = 0.2 as a function of V ¯ ; zoomed-in portion showing portion of segments 4 and 5 More
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