Differential Stiffness system for attenuating vibrations

Details Differential Stiffness system for attenuating vibrations Differential Stiffness system for attenuating vibrations

1998-08-06

2000-05-16

Ramirez, Ramon O.

Supports

With condition responsive control means

188380, 248638, F16M 1300

Patent

active

060625260

ABSTRACT:
A vibration attenuation system (10) is disclosed for at least partially isolating a structure (16) from a vibrating source (14). The system (10) generally includes a differential stiffness assembly (12) interposed between the vibration source (14) and the structure (16), a vibration sensor (18) for sensing a vibration from the source (14), a controller (20) for controlling operation of the differential stiffness assembly (12) based on a sensed vibration from the source (14), and an actuator for varying a load applied to the differential stiffness assembly (12) in response to control signals from the controller (20). The differential stiffness assembly (12) includes an element such as a metallic tube (30), that provides a variable frequency-related vibration transmission/attenuation response depending on a load applied to the member. In one embodiment, a shape memory alloy wire (28) is interconnected to the tube (30) to apply a varying load to the tube (30) depending on a temperature of the wire (28).

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