| 摘要 |
The invention, which relates to a method for monitoring the load on rotor blades of wind energy installations by means of acceleration measurements o n at least one rotor blade of a wind energy installation and the determinati on of the load on the rotor blade from the picked-up acceleration signals, i s based on the object of specifying a method with which dynamic, even uncrit ical load states can be detected, in differentiated fashion, and combined in a suitable form for evaluation in order to influence, if possible prior to the onset of damage to the rotor blade, the mode of operation of the wind en ergy installation, in particular the design of the pitch control or angle se tting of stall-regulated rotor blades, on the basis both of all of the rotor blades together and of a single rotor blade. This problem is solved by the frequency of the occurrence of the load values over a certain period of time being determined from the amplitudes of the time signal or the amplitudes o f selected natural oscillations of the frequency spectra obtained by Fourier transformation. |
