Page 33 - Vibrations

Which means the impulse

function is a white noise

source – it contains all

frequencies.

The narrower the impulse the greater the number of

frequencies contained in it.

Used to find the resonance frequencies of a mechanical

systems.

A convolution occurs, where the impulse response of a

machine convolves with the impulse function,

′
′
∫ ℎ() ( − ) = ℎ( )

The Fourier Transform will give you the Transfer function

of the machine,

∫ ℎ() − = ()

The machine’s resonance – the cause of vibrations will

show up in ().

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