Device and method for controlling vibration with piecewise-linear nonlinearity
AssigneeOhio State Innovation Foundation
InventorsKiran D'Souza, Meng-Hsuan Tien
Life of this patent
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Abstract
Various implementations include a device for controlling vibration with piecewise-linear nonlinearity. The device includes a stiffness element, a mass, a stopper, and an actuator. The stiffness element is expandable and compressible along an axis. The mass is coupled to the stiffness element. The mass has a resting mass position along the axis. The actuator is coupled to the stopper. The actuator is configured to move the stopper along the axis to vary a gap size. The gap size is measured as a distance between the resting mass position and a resting stopper position.
Claims19
A device for controlling vibration with piecewise-linear nonlinearity, the device comprising:
- a stiffness element that is expandable and compressible along an axis;
- a mass coupled to the stiffness element, wherein the mass has a resting mass position along the axis;
- a stopper;
- an actuator coupled to the stopper, the actuator being configured to move the stopper along the axis to vary a gap size, wherein the gap size is measured as a distance between the resting mass position and a resting stopper position;
- and
- a controller configured to determine an optimized gap size based on an identified dominant frequency and amplitude of an excitation signal and cause the actuator to move the stopper along the axis toward the optimized gap size.
A method of controlling vibration with piecewise-linear nonlinearity, the method comprising:
- (a) introducing a device for controlling vibration with piecewise-linear nonlinearity to an excitation signal, the device comprising:
- a stiffness element that is expandable and compressible along an axis,
- a mass coupled to the stiffness element, wherein the mass has a resting position along the axis,
- a stopper, and
- an actuator coupled to the stopper, the actuator being configured to move the stopper along the axis to vary a gap size, wherein the gap size is measured as a distance between the resting mass position and a resting stopper position;
- (b) measuring or computing the excitation signal;
- (c) identifying a dominant frequency and amplitude of the excitation signal;
- (d) determining an optimized gap size based on the identified dominant frequency and amplitude of the excitation signal;
- and
- (e) moving the stopper along the axis toward the optimized gap size.
Dependencies are inferred from the claim text.