Sikorsky Aircraft Corporation

General Dynamics Advanced Information Systems, Inc.

General Dynamics Advanced Technology Systems, Inc.

Charles R Berezin

William Arthur Welsh

Peter F Lorber

Christopher Sutton

Michael S Torok

Shyam Neerarambam

Antonios N Kotoulas

Robert C Moffitt

James E Duh

A rotor system includes a rotor hub, a plurality of rotor blades supported by the rotor hub, and a fairing mounted to the rotor hub. The fairing includes an external surface exposed to an external airflow and an internal surface defining an interior portion. One or more heat generating components are arranged in the interior portion. A cooling system is arranged in the interior portion. The cooling system includes a first heat exchanger thermally connected to each of the one or more heat generating components, a second heat exchanger mounted to the fairing, and at least one fluid conduit extending therebetween so as to remove heat generated by each of the one or more heat generating components.

Cooling system for heat generating components in a fairing

A rotor system including a rotor hub, and a plurality of rotor blades. Each of the plurality of rotor blades includes a hub end. A plurality of rotor blade actuators is operatively connected to the hub end of a corresponding one of the plurality of rotor blades. A fairing is mounted to the rotor hub. The fairing includes an external surface and an internal surface defining an interior portion. The hub end and rotor blade actuator of each of the plurality of rotor blades is arranged in the interior portion. A cooling system is arranged in the interior portion. The cooling system includes a first heat exchanger thermally connected to each of the plurality of rotor blade actuators, a second heat exchanger mounted to the fairing, and at least one fluid conduit extending therebetween.

Cooling system for rotor blade actuators

A main rotor blade assembly with a high negative pitching moment airfoil section having a pitching moment coefficient beyond (more negative than) &#x2212;0.035 at Mach Numbers below 0.80 and a blade taper of 1:5 or greater.. The main rotor blade preferably limits blade torsional bending and an aft loaded tip airfoils to approximately 'no more' than that of conventional effective rotor blade designs based on conventional tip airfoil sections.

Rotor blade assembly with high pitching moment airfoil section for a rotary wing aircraft

Two neural networks are used to control adaptively a vibration and noise-producing plant. The first neural network, the emulator, models the complex, nonlinear output of the plant with respect to certain controls and stimuli applied to the plant. The second neural network, the controller, calculates a control signal which affects the vibration and noise producing characteristics of the plant. By using the emulator model to calculate the nonlinear plant gradient, the controller matrix coefficients can be adapted by backpropagation of the plant gradient to produce a control signal which results in the minimum vibration and noise possible, given the current operating characteristics of the plant.

Neural net controller for noise and vibration reduction

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Trumbull, CT, United States of America

Charles R Berezin