Probability Density

This calculation generates the probability distribution of a signal, and also, for comparison, the Gaussian or normal distribution with the same mean and standard deviation.

Using the Revs at Level option, it is also possible to bin the signal based upon a signal other than time. In this case the Azimuth signal will also need to be defined. If rotor azimuth is selected for this, the load level will be binned against the number of revolutions, which is useful in gearbox and bearing design.

Click the Select... buttons to select channels to be processed. If you have selected multiple channels you will be able to specify a number of load cases and variables to be processed in a single calculation, and the results for each load case will then be stored as additional outputs of that load case, and/or accumulated over the turbine lifetime.

For each variable to be processed, enter the following data:

• Minimum value: the start of the distribution (should be less than the signal minimum).

• Maximum value: the end of the distribution (should be greater than the signal maximum).

• Number of bins: suggest 20. A higher number (maximum 144) will give finer resolution, provided there is sufficient data.

• Remove mean: If this is selected, the distribution will be representative of deviations from the mean, and so the distribution mean will be zero. If Multiple Channels is selected, the means will not be removed.

Last updated 30-08-2024