Adaptively tuned elastomeric vibration absorber
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United States of America Patent
Stats
-
Jul 20, 1999
Grant Date -
N/A
app pub date -
Dec 9, 1997
filing date -
Dec 9, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for reducing vibration has a mount for attaching to a vibrating body, such as the frame of an aircraft. A plate is spaced from the mount with a mass there between. A first elastomeric ring is compressed between the mass and the mount, and a second elastomeric ring is compressed between the mass and the plate. The rings act as a spring having a stiffness that defines a resonant frequency at which the mass oscillates. Vibration in the body is reduced by the mass movement absorbing vibrational energy and the energy absorption is maximized when the mass resonates at the vibration frequency. A controller senses body vibration and operates a mechanism that alters the spacing between the mount and the plate thereby adjusting the spring stiffness. The stiffness of the spring is changed until the resonant frequency of the mass is tuned to the vibration frequency of the body.
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