Machine vibration baseline synthesizer

• US 20090292505A1
• Filed: 05/18/2009
• Published: 11/26/2009
• Est. Priority Date: 05/20/2008
• Status: Active Grant

• Current Assignee: Azima Holdings Incorporated (Fortive Corp.)
• Original Assignee: Dli Engineering Corporation (Fortive Corp.)
• Inventors: LaPorte, Laurent H., Van Dyke, David J., Watts, William A.
• Granted Patent: US 8,370,109 B2
• Time in Patent Office: Days
• US Class Current: 702/184
• CPC Class Codes: G01H 1/00 Measuring characteristics of vibrations in solids by using direct conduction to the detector G01H9/00, G01H11/00 take precedence
• CPC Class Codes: G01M 13/028 Acoustic or vibration analysis

Abstract

Machine vibration baselines are synthesized without averaging historical vibration data. Instead machinery configuration information is used, including data about the machine train, the machine'"'"'s rotating components, and the machine speeds. For each component being considered, a plurality of parameters is identified for deriving baseline portions. The parameters for one component are used to identify baseline vibration amplitude floor values, vibration amplitudes at frequencies corresponding to various harmonics of a rotational speed, and vibration amplitudes corresponding to forcing frequencies and their harmonics/sidebands. Parameters for other components also may be used to identify amplitudes at harmonic frequencies and forcing frequencies.

Claims

1. A method of synthesizing a machine vibration baseline, comprising:

receiving machine configuration data;

processing the machine configuration data to identify a prime component, one or more other components, and one or more forcing frequency indicators;

setting first vibration amplitude values at harmonic frequencies within the baseline, wherein the harmonic frequencies are determined at least in part according to the identification of the prime component;

setting second vibration amplitude values at harmonic frequencies within the baseline based at least in part on the identification of said one or more other components; and

setting a third vibration amplitude value at a forcing frequency based at least in part on one of said one or more forcing frequency indicators.

2. The method of claim 1, further comprising:

setting respective vibration amplitude floor values for at least a first and a second frequency range of the baseline based at least in part on the identification of the prime component.

3. The method of claim 1, wherein said step of receiving comprises receiving machine train data, component data and machine speed data, and wherein said setting first vibration amplitude values are based at least in part on the identification of the prime component and the machine speed data.

5. The method of claim 1, wherein said one or more forcing frequency indicators comprises blade pass.

6. The method of claim 1, wherein said one or more indicators of vibration comprises gear mesh.

7. The method of claim 1, wherein said one or more indicators of vibration comprises a bearing tone.

8. The method of claim 1, wherein said one or more indicators of vibration comprises a belt rate.

9. The method of claim 1, wherein said one or more indicators of vibration comprises flow noise.

10. The method of claim 1, wherein said one or more indicators of vibration comprises a harmonics decay pattern.

11. The method of claim 1, wherein said one or more indicators of vibration comprises a sideband decay pattern.

12. The method of claim 1, further comprising accessing, based upon the identification of the prime component, a plurality of parameters to be used for deriving portions of the baseline, wherein said plurality of parameters are used for said setting said first vibration amplitude values and said third vibration amplitude value.

13. The method of claim 1, further comprising shaping the baseline in the vicinity of said first vibration amplitude values and said second vibration amplitude values.

14. The method of claim 1, further comprising processing the machine configuration data to identify a first code for the prime component, respective second codes for each one of the one or more other components, and respective third codes for each one of the identified one or more forcing frequency indicators, wherein the first code, respective second codes, and respective third codes are used to access vibration parameters for use in synthesizing the machine vibration baseline.

4. The method of claim 4, further comprising receiving a test location, wherein the prime component is identified based at least in part on the test location.

15. A method for screening a machine, comprising:

identifying machine train, components, machine speed and test location for the machine;

configuring a diagnostic system for screening the machine;

measuring actual machine vibration data generated by the machine;

synthesizing a machine vibration baseline within a frequency range for the test location without averaging historical vibration data from either one or both of the machine and an identical machine, wherein the step of synthesizing comprises setting a baseline vibration amplitude value for at least each one of a harmonic frequency and a forcing frequency that are based at least in part on identification of a prime component; and

analyzing the actual machine vibration data, wherein said analyzing comprises accessing the synthesized baseline.

16. The method of claim 15, in which said synthesizing comprises:

receiving machine configuration data;

processing the machine configuration data to identify the prime component, one or more other components, and one or more forcing frequency indicators;

setting a first vibration amplitude value at said harmonic frequency;

setting second vibration amplitude values at harmonic frequencies within the baseline based at least in part on the identification of said one or more other components; and

setting a third vibration amplitude value at said forcing frequency based at least in part on one of said one or more forcing frequency indicators associated with the prime component.

17. The method of claim 16, further comprising:

setting respective vibration amplitude floor values for at least a first and a second frequency range of the baseline based at least in part on the identification of the prime component.

18. The method of claim 16, further comprising identifying, based upon the identification of the prime component, a plurality of parameters to be used for deriving portions of the baseline, wherein said plurality of parameters are used for said setting said first vibration amplitude values and said third vibration amplitude value.

19. An apparatus for synthesizing a machine vibration baseline within a frequency range for a test location of a machine without averaging historical vibration data from either one or both of the machine and an identical machine, comprising:

means for inputting machine configuration data;

processing means for processing the machine configuration data to identify a prime component, one or more other components, and one or more forcing frequency indicators;

processing means for setting first vibration amplitude values at harmonic frequencies within the baseline, wherein the harmonic frequencies are determined at least in part according to the identification of the prime component;

processing means for setting second vibration amplitude values at harmonic frequencies within the baseline based at least in part on the identification of said one or more other components; and

processing means for setting a third vibration amplitude value at a forcing frequency based at least in part on one of said one or more forcing frequency indicators.

20. The apparatus of claim 19, further comprising:

processing means for setting respective vibration amplitude floor values for at least a first and a second frequency range of the baseline based at least in part on the identification of the prime component.

21. The apparatus of claim 19, further comprising

memory for storing vibration amplitude values for rotational speed harmonics, forcing frequencies and other vibration parameters from which said first vibration amplitude values, said second vibration amplitude values, and third vibration amplitude value are derived, wherein said values stored in memory are obtained without averaging historical vibration data from said machine.

22. A diagnostic testing system for screening a machine, comprising:

means for receiving machine train, components, machine speed and test location data for the machine;

sensors for measuring actual machine vibration data generated by the machine;

a machine vibration baseline synthesizer for synthesizing a machine vibration baseline within a frequency range for the test location without averaging historical vibration data from either one or both of the machine and an identical machine, wherein the step of synthesizing comprises setting a baseline vibration amplitude value for at least each one of a harmonic frequency and a forcing frequency that are based at least in part on identification of a prime component; and

processing means for analyzing the actual machine vibration data, wherein said processing means accesses the synthesized baseline.

23. The system of claim 22, wherein said machine vibration baseline synthesizer comprises:

means for inputting machine configuration data;

processing means for processing the machine configuration data to identify a prime component, one or more other components, and one or more forcing frequency indicators;

processing means for setting first vibration amplitude values at harmonic frequencies within the baseline, wherein the harmonic frequencies are determined at least in part according to the identification of the prime component;

processing means for setting second vibration amplitude values at harmonic frequencies within the baseline based at least in part on the identification of said one or more other components; and

processing means for setting a third vibration amplitude value at a forcing frequency based at least in part on one of said one or more forcing frequency indicators.

24. The apparatus of claim 23, further comprising:

processing means for setting respective vibration amplitude floor values for at least a first and a second frequency range of the baseline based at least in part on the identification of the prime component.

25. The apparatus of claim 23, further comprising

memory for storing vibration amplitude values for rotational speed harmonics, forcing frequencies and other vibration parameters from which said first vibration amplitude values, said second vibration amplitude values, and third vibration amplitude value are derived, wherein said values stored in memory are obtained without averaging historical vibration data from said machine.