METHOD FOR DAMPING REAR EXTENSION ARM VIBRATIONS OF ROTORCRAFT AND ROTORCRAFT WITH A REAR EXTENSION ARM VIBRATION DAMPING DEVICE
First Claim
1. A method for damping vibrations in a tail boom of a rotary-wing aircraft, the method comprising:
- detecting tail boom vibrations induced by external vibration excitation; and
generating and introducing strains into the tail boom based on the detected tail boom vibrations, the strains being applied over a surface area and being out-of-phase with respect to the detected tail boom vibrations; and
damping the externally excited induced tail boom vibrations.
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Abstract
A method for damping vibrations in a tail boom of a rotary-wing aircraft includes the steps of detecting tail boom vibrations induced by external vibration excitation, and generating and introducing strains into the tail boom based on the detected tail boom vibrations. The strains are applied over a surface area and are out-of-phase with respect to the detected tail boom vibrations so as to damp the externally excited induced tail boom vibrations. In addition, a rotary-wing aircraft, includes a fuselage, a cockpit area integrated into the fuselage, a tail boom arranged on the fuselage and a tail boom vibration-damping device. The vibration-damping device has at least one sensor element configured to detect tail boom vibrations induced by external vibration excitation and at least one actuator configured to generate and introduce strains into the tail boom that are out-of-phase with respect to the induced tail boom vibrations, the actuator being functionally coupled to the sensor element, engaging with a tail boom structure at one side of the tail boom, and forming a flat-surfaced bond with the tail boom.
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Citations
20 Claims
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1. A method for damping vibrations in a tail boom of a rotary-wing aircraft, the method comprising:
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detecting tail boom vibrations induced by external vibration excitation; and generating and introducing strains into the tail boom based on the detected tail boom vibrations, the strains being applied over a surface area and being out-of-phase with respect to the detected tail boom vibrations; and damping the externally excited induced tail boom vibrations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A rotary-wing aircraft, comprising:
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a fuselage; a cockpit area integrated into the fuselage; a tail boom arranged on the fuselage; and a tail boom vibration-damping device having at least one sensor element configured to detect tail boom vibrations induced by external vibration excitation and at least one actuator configured to generate and introduce strains into the tail boom that are out-of-phase with respect to the induced tail boom vibrations, the actuator being functionally coupled to the sensor element, engaging with a tail boom structure at one side of the tail boom, and forming a flat-surfaced bond with the tail boom. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification