Method, device, and graphical user interface for analysing a mechanical object

Patent metadata

Field	Value
Publication number	US-12399080-B2
Application number	US-202117794975-A
Country	US
Kind code	B2
Filing date	Jan 27, 2021
Priority date	Jan 27, 2020
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

The disclosure is directed to a method comprising the steps: carrying out multiple measurements on a mechanical object, the measurements each differing by one or more parameters influencing the measurement; determining a spectrogram on the basis of the measurement data of the measurements and depending on a predefined parameter of the mechanical object; determining one or more excitations of the mechanical object; reproducing the excitations in the spectrogram.

First claim

What is claimed is:

1. A method for analyzing a movement behavior of a mechanical object, comprising the steps of:
carrying out multiple measurements of a mechanical movement, using position-based methods and/or force-based methods at a large number of measuring points on the mechanical object, the measurements of the mechanical movement each differing by one or more parameters influencing the measurements of a mechanical movement, wherein the one or more parameters includes a rotational speed of the mechanical object;
wherein the mechanical object is a rotating blade disk mounted on a shaft;
determining a first partial spectrogram on the basis of measurement data of the measurements of a mechanical movement and depending on a predefined parameter of the mechanical object for selection of the measurement data of the measurements;
determining a second partial spectrogram on the basis of measurement data of the measurements of a mechanical movement and depending on a predefined parameter of the mechanical object for selection of the measurement data of a measurement;
fusing the first partial spectrogram and the second partial spectrogram into a composite spectrogram;
determining one or more excitations of the mechanical object; the excitations being maximum amplitudes for the spectrogram;
displaying the excitations of the mechanical object in the composite spectrogram; and
balancing the mechanical object.

2. The method for analyzing a movement behavior of a mechanical object according to claim 1 , wherein the first or second partial spectrogram is determined on the basis of a time or of a time-dependent value of a rotational speed of the mechanical object or a rotational speed of a part of the mechanical object.

3. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the step of:
production of an analytical prediction, of a frequency or of a frequency domain of the mechanical object in the first or second partial spectrogram.

4. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the step of:
interpolating the measurement data on the basis of common reference points of a common grid in the first or second partial spectrogram.

5. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the steps of:
comparing the measurement data of individual measurements at one or more reference points; and
selecting a measurement result of the measurement data on the basis of compared measurement data and on the basis of an amplitude of a vibration at a corresponding frequency.

6. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the step of:
displaying points and/or regions of the composite spectrogram on the basis of an amplitude of a vibration exceeding a threshold value.

7. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the step of:
filtering one set of measurement data or a plurality of measurement data of one measurement or a plurality of measurements prior to determining the composite spectrogram.

8. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the steps of:
in particular, manual selection of a point and/or region of the composite spectrogram; and
displaying measurement data on the basis of the point and/or region.

9. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the steps of:
selecting a region of the composite spectrogram; and
carrying out a statistical analysis on the basis of measurement data in this region.

10. The method for analyzing a movement behavior of a mechanical object according to claim 1 , wherein the first or second partial spectrogram is determined on the basis of an integral transform selected from the group consisting of Fourier transform, sine transform, cosine transform, wavelet transform, and chirplet transform.

11. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the step of:
displaying the composite spectrogram in a graphical user interface together with one or more of the features selected from a group consisting of one or a plurality of predicted frequencies or frequency domains, one or more common reference points and/or of interpolated points, points or regions that were determined on the basis of a predefined criterion, filtered points or regions of the measurement data, a result of a statistical analysis, and an integral transform used.

12. The method for analyzing a movement behavior of a mechanical object according to claim 1 , further comprising the steps of:
selecting one or more values in a frequency domain and/or in a time-dependent domain of the first or second partial spectrogram;
displaying a plot of the time-dependent domain at the selected value or values of the frequency domain and/or displaying a plot of the frequency domain at the selected value or values of the time-dependent domain.

13. A device for analyzing a movement behavior of a mechanical object, wherein the device is configured and arranged for implementing the following steps:
carrying out multiple measurements of a mechanical movement, using position-based methods and/or force-based methods at a large number of measuring points on the mechanical object, the measurements each differing by one or more parameters influencing the measurements; Wherein the one or more parameters includes a rotational speed of the mechanical object;

wherein the mechanical object is a rotating blade disk mounted on a shaft;
determining a first partial spectrogram on the basis of measurement data of the measurements and depending on a predefined parameter of the mechanical object;
determining a second partial spectrogram on the basis of measurement data of the measurements and depending on a predefined parameter of the mechanical object;
fusing the first partial spectrogram and the second partial spectrogram into a composite spectrogram;
determining one or more excitations of the mechanical object; the excitations being maximum amplitudes for the spectrogram;
displaying the excitations in the composite spectrogram; and
balancing the mechanical object.

Assignees

• MTU Aero Engines AG

Inventors

• Theurich Daniel
• Junge Michael

Classifications

• G01M15/12

  by monitoring vibrations · CPC title

• G01M15/14

  Testing gas-turbine engines or jet-propulsion engines · CPC title

• G01H1/006

  of the rotor of turbo machines · CPC title

• G01M5/0016

  of aircraft wings or blades · CPC title

• G01M5/0066

  by exciting or detecting vibration or acceleration (vibration testing of structures G01M7/00) · CPC title