Systems and methods for lifting body vibration control
First Claim
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1. An external cargo system for a rotary wing aircraft, comprising:
- lifting gear having rotary wing aircraft and external cargo ends; and
a damping assembly which is tunable to one or more frequencies of the rotary wing aircraft and which is connected in series with the lifting gear, wherein the lifting gear and the damping assembly define a damped load path extending through the rotary wing aircraft and external cargo ends of the lifting gear to reduce vibrational force transmitted along the load path between an external load suspended from a rotary wing aircraft and the rotary wing aircraft, and wherein the lifting gear is configured to connect the damping assembly to the external load,the damping assembly comprising;
a housing defining an aperture;
a sliding piston extending through the housing aperture and slidably disposed within an interior of the housing; and
a floating piston slidably disposed within an interior of the sliding piston, wherein the floating piston separates a variable volume first chamber and a constant volume chamber defined within an interior of the damping assembly.
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Abstract
An external cargo damping system includes lifting gear and a damping assembly. The lifting gear has a lifting body attachment end and an opposed external cargo end, and defines a load path that extends between the lifting body attachment and external cargo ends of the lifting gear. The damping assembly is connected in series with the lifting gear and is disposed along the load path to damp vibratory force transmitted between the lifting gear lifting body attachment and lifting gear ends.
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Citations
11 Claims
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1. An external cargo system for a rotary wing aircraft, comprising:
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lifting gear having rotary wing aircraft and external cargo ends; and a damping assembly which is tunable to one or more frequencies of the rotary wing aircraft and which is connected in series with the lifting gear, wherein the lifting gear and the damping assembly define a damped load path extending through the rotary wing aircraft and external cargo ends of the lifting gear to reduce vibrational force transmitted along the load path between an external load suspended from a rotary wing aircraft and the rotary wing aircraft, and wherein the lifting gear is configured to connect the damping assembly to the external load, the damping assembly comprising; a housing defining an aperture; a sliding piston extending through the housing aperture and slidably disposed within an interior of the housing; and a floating piston slidably disposed within an interior of the sliding piston, wherein the floating piston separates a variable volume first chamber and a constant volume chamber defined within an interior of the damping assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification