Modal analysis method and apparatus therefor
US6763310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | May 13, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M7/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A modal analysis method and apparatus for acoustically determining vibration characteristics of a structure uses a MISO model. An acoustic excitation signal toward spatially distributed locations associated with the structure is generated while the latter is held vibrated, one location being chosen as reference. Complementary sets of input acoustic pressure-related signals are produced, one being a reference signal. Fourier analysis is performed on the input signals to provide correlated input acoustic pressure-related data in frequency domain including reference data. Induced output vibration is sensed at a reference point on the structure corresponding to the reference to produce complementary sets of output vibration signals, which are converted through Fourier analysis into sets of output vibration data in frequency domain. Structural transfer functions characterizing each set of input acoustic pressure-related data are obtained from which vibratory characteristics of the structure are derived.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.