Active control apparatus and method for vibration reduction

Details Active control apparatus and method for vibration reduction Active control apparatus and method for vibration reduction

1997-08-25

1999-10-12

Oberleitner, Robert J.

Brakes

Inertia of damping mass dissipates motion

Resiliently supported damping mass

248562, F16F 710

Patent

active

059643277

ABSTRACT:
Apparatus for reducing a vibration that is propagated from outside a structure involves using a stiffener having a support point and a base point situated a distance from the support point to absorb the vibration. When an outside vibration is propagated to the structure, elastic strains occur both in the structure and in the stiffener, and the support point moves relative to the base point. The vibration reduction apparatus monitors the relative velocity of the support point relative to the base point, and when the monitored relative velocity changes its direction, releases a coupling between the support point of the stiffener and the structure, resulting in quick release of potential energy induced by the elastic strain stored in the stiffener and zeroing of the relative velocity between the support point and the base point. The support point of the stiffener is immediately re-coupled to the main structure upon zeroing of the relative velocity, and the relative velocity continues to be monitored until it either becomes zero or again changes direction, at which time the coupling and recoupling is repeated.

REFERENCES:
patent: 3382955 (1968-05-01), Deyerling
patent: 4030579 (1977-06-01), Sell
patent: 4385665 (1983-05-01), Knoll
patent: 4586425 (1986-05-01), Redman et al.
patent: 4589301 (1986-05-01), Griner
patent: 4650167 (1987-03-01), Steiner et al.
patent: 4674725 (1987-06-01), Popper
patent: 5197573 (1993-03-01), De La Fuente et al.

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