Sikorsky Aircraft Corporation

Bell Helicopter Textron Inc.

Stephen Johnston

Frank B Stamps

Brian Edward Tucker

William Arthur Welsh

Scott A Chasen

Peter Quinn Romano

Peter H Kintzinger

James Mccollough

Joseph Caterisano

An active vibration control system for an aircraft includes a gearbox operably coupling a power source and a component rotatable about an axis. The gearbox includes a flexible region which allows flexure between a first stage and a second stage. At least one active vibration control actuator is arranged in vibrational communication with the flexible region to counteract vibrations transmitted between the power source and the rotatable component.

Case mounted transmission AVC force generators

A rotor hub assembly includes an open rotor hub assembly with an open rotor hub and a mounting plate. The open rotor hub includes an annular base portion with periphery and a plurality of rotary member portions arranged about the annular base portion that each define an aperture for receiving a rotor blade. The mounting plate spans the annular base portion and is coupled to the annular base portion by a resilient member to accommodate radially expansion and contraction of the annular base portion according to loads exerted on the rotor hub by rotor blades seated in the apertures of the rotary member portions.

Mounting plates for rotor hub accessories

A bearing assembly can include a top retainer; a middle retainer having a first concave spherical surface; a bottom retainer having a second concave spherical surface; a spherical ball member; and an elastomeric member coupled to the first concave spherical surface, the second concave spherical surface, and an outer surface of the spherical ball member.

Elastomeric spherical bearing assembly and structural member incorporating the same

According to one embodiment, a system for assessing health of an aircraft includes a receiver, a flight spectrum analyzer, and a health assessment analyzer. The receiver receives, from an aircraft, a plurality of measurements associated with two or more flight parameters. The plurality of measurements includes measurements spanning at least one period of time. The flight spectrum analyzer determines, based on a comparison of the plurality of measurements to a plurality of flight spectrum definitions, an amount of time the aircraft spent in each flight spectrum of a plurality of flight spectrums during the at least one period of time. The health assessment analyzer assesses a change in health of the aircraft over the at least one period of time based on the determination of the amount of time the aircraft spent in each flight spectrum and a plurality of spectrum health profiles.

Growing community of inventors

Fort Worth, TX, United States of America

Stephen Johnston