I will be performing some tests and measuring the vibrations of a planetary gearbox. The accelerometer I will be using stays attached to the gearbox and saves the data into a log, which is available after the test is finished.
My main objective is to extract the natural frequencies of the accelerometer data and compare them with a simulation derived from an analytical model.
What is the best method for the signal conditioning of the accelerometer data? I don't understand if the steps between, do I need to have an Integrator for determining the velocity and displacement also, or will a direct fourier analysys like the fft will yield the natural frequencies?