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Unformatted text preview: Unfortunately it is not always convenient to create an impulse in the laboratory. Besides, it is often the frequency response function which is desired anyway. Therefore it is useful to inquire as to whether the frequency response function can be obtained directly. It is important to remember that both the frequency response function and the impulse response function contain the same information – if either is known, both are known since they are a Fourier transform pair. Using the properties of the delta function and Fourier transform it can be shown that the output to a sine wave input is: [ ] ( ) ( ) cos 2 ( ) y t H f f t f πφ = + (11)...
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This document was uploaded on 01/03/2011.
- Spring '09