Method of monitoring the effectiveness of a damper, and a device for implementing said method
US8532845B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 2011 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Dec 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D19/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention relates to a method of monitoring the effectiveness of a damper system, wherein the method consists in measuring the relative movements of two strength members, in filtering the measurements in order to isolate those that relate to the lead-lag resonant frequency of the blade, in rectifying the signal, in recording the signal, in comparing the rectified signal (S) with a threshold value (SL), in determining an initial time interval (T0) as soon as the rectified signal exceeds the threshold value (SL), in calculating the integrals of the signal from T0 to T0+δ and from T0 to T0+pδ, in calculating the ratio R of the integrals, and in comparing the ratio R with a limit value RL, and in activating and delivering an alert signal (V1) if the ratio R is greater than or equal to the limit value RL.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.