System and method for obtaining and de-noising vibratory data
AssigneeGeneral Electric Company
InventorsJohn McConnell Delvaux, Huageng Luo
Life of this patent
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Abstract
In one aspect, a method for de-noising vibratory data of a test component is disclosed. The method may generally include obtaining data related to a plurality of modeled mode shapes of a finite element model of a test component, obtaining data related to a plurality of experimental mode shapes of the test component from a plurality of non-contact vibration measurement devices and de-noising with a computing device the plurality of experimental mode shapes using the plurality of modeled mode shapes to create a plurality of de-noised mode shapes for the test component.
Claims20
A method for de-noising vibratory data of a test component, the method comprising:
- obtaining data related to a plurality of modeled mode shapes of a finite element model of a test component;
- obtaining data related to a plurality of experimental mode shapes of the test component from a plurality of non-contact vibration measurement devices;
- and
- de-noising with a computing device the plurality of experimental mode shapes using the plurality of modeled mode shapes to create a plurality of de-noised mode shapes for the test component,
- wherein the de-noising is accomplished by projecting the plurality of experimental mode shapes onto a subspace spanned by the plurality of modeled mode shapes to determine the plurality of de-noised mode shapes.
A system for obtaining and de-noising vibratory data of a test component, the system comprising:
- a plurality of non-contact vibration measurement devices configured to detect vibration parameters of the test component as the test component is vibrated;
- and
- a computing device communicatively coupled to the plurality of non-contact vibration measurement devices and including a finite element model of the test component, the computing device being configured to determine a plurality of experimental mode shapes for the test component based on the vibration parameters and a plurality of modeled mode shapes for the test component based on the finite element model,
- wherein the computing device is further configured to de-noise the plurality of experimental mode shapes using the plurality of modeled mode shapes to create a plurality of de-noised mode shapes for the test component,
- wherein the plurality of experimental mode shapes are de-noised by projecting the plurality of experimental mode shapes onto a subspace spanned by the plurality of modeled mode shapes.
A system for obtaining and de-noising vibratory data of a test component, the system comprising:
- a plurality of non-contact vibration measurement devices configured to detect vibration parameters of the test component as the test component is vibrated;
- and
- a computing device communicatively coupled to the plurality of non-contact vibration measurement devices and including a finite element model of the test component, the computing device being configured to determine a plurality of experimental mode shapes for the test component based on the vibration parameters and a plurality of modeled mode shapes for the test component based on the finite element model,
- wherein the computing device is further configured to de-noise the plurality of experimental mode shapes using the plurality of modeled mode shapes to create a plurality of de-noised mode shapes for the test component, the plurality of experimental mode shapes being de-noised using the following equations:
- {
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- {
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- 1
- n
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- wherein, {Ψi} corresponds to the ith experimental mode shape, { Ψi} corresponds to the ith de-noised mode shape, εi corresponds to contamination in the ith experimental mode shape, {Φj} corresponds to the jth modeled mode shape and αij corresponds to the contribution of the jth modeled mode shape on the ith experimental mode shape.
Dependencies are inferred from the claim text.