Patent ID: 9739167
Date: 2017-08-22
CPC Classifications: F01D,F02C,F05D,G01H

Claim:
1. A method for managing a health of rotating blades of a rotor assembly, comprising: establishing sets of blade frequency values based upon a measured vibratory response of the blades for each rotating blade of a rotor assembly of an engine at two or more different points in time, wherein the blade frequency values are established by analyzing a complete row of blades as a system using a mistuning analysis technique to extract a frequency of each blade which reflects structural and aerodynamic coupling of the blades and applying a function in which the extracted frequency is an independent variable; comparing the sets of blade frequency values to determine a change in the blade frequency values for each rotating blade; and changing a physical operating parameter of the engine in response to a value of the change in the blade frequency values; and wherein the system of rotating blades comprises at least one entire row of rotating blades, and wherein the function comprises a blade frequency ratio.