United Technologies Corporation

Sikorsky Aircraft Corporation

Raytheon Technologies Corporation

Seung Bum Kim

Zaffir A Chaudhry

Fanping Sun

Michael G McCaffrey

Joel H Wagner

Lee A Hoffman

Austin Fang

Robert Mark Lex

Curtis S James

Hailing Wu

Matthew James Wasilewski

Harvey A Samuels

Alonso Guzman

David James Majko

A system for modulating turbine blade tip clearance is provided. The system may comprise an actuation control system having at least one actuator configured to modulate turbine blade tip clearance between a turbine blade tip and a blade outer air seal (BOAS). Each actuator may be coupled to the BOAS. Each actuator may comprise a solid-state motion amplification device such as a flextensional actuator. The actuators may be configured to move the BOAS in a radial direction from a first position to a second position to control tip clearance.

System for modulating turbine blade tip clearance

An optical blade tracking system for a rotary wing aircraft, the system including a light source generating at least one light beam, the light source coupled to a rotor blade of the rotary wing aircraft, wherein movement of the rotor blade is imparted to the light source; a two-dimensional position detector generating signals indicative of a position of the light beam along a first axis and a position of the light beam along a second axis and generating a signal indicative of an angular position of the light beam about a third axis; a processor receiving the signals, the processor determining at least one of lead-lag, flap and pitch of the rotor blade in response to the signals; and a polarizer filter positioned between the light source and the two dimensional position detector, the polarizer filter modulating intensity of the light beam onto the two-dimensional position detector.

Optical tracking of rotor blade motion

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Glastonbury, CT, United States of America

Seung Bum Kim