Apparatus and method for determining a resonant frequency of a wind turbine tower
US8044670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2009 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | May 13, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/728
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for determining a resonant frequency of a wind turbine tower is provided. The apparatus includes a processing unit configured to receive an acceleration measurement value, the acceleration measurement value representative of the acceleration of the wind turbine tower in the direction parallel to a rotor rotational axis of the wind turbine and/or in the direction perpendicular to both the rotor rotational axis and the tower axis of the wind turbine. The apparatus includes a memory configured to store a series of acceleration measurement values, and the processing unit includes a Fourier transform module configured to calculate a spectral vector based on calculating a convolution-based fast Fourier transform of the series of acceleration measurement values, and includes a resonant frequency calculation module configured to calculate the tower resonant frequency based on the calculated spectral vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.