Patent ID: 11928811
Assignee: RTX CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A method for determining structural vibration mode characteristics of a component, the method comprising:
directing a fluid flow across an imaging surface of the component in a direction between the component and at least one imaging device;
obtaining digital image correlation (DIC) image data by recording a plurality of images of the imaging surface with at least one imaging device as the fluid flow is directed across the imaging surface of the component;
preparing a DIC dataset which includes the DIC image data;
applying a dynamic mode decomposition (DMD) technique to the DIC dataset to determine a plurality of DMD modes;
selecting at least one dominant DMD mode from the plurality of DMD modes;
classifying each of the at least one selected dominant DMD mode as a standing wave or a traveling wave; and
determining structural vibration mode characteristics of the component by extracting the structural vibration mode characteristics from each of the at least one selected dominant DMD mode having a standing wave classification.