Patent ID: 8600696

Claim:
A method for determining a frequency spectrum and at least one resonant frequency for a selected location in an information processing system ( 2 ) in which reaction signals (Y OutMax ) for ascending or descending input frequencies of an input signal (X In ) are determined by a procedure in which the input signal (X In ), which corresponds to a stimulus that occurs with a specific frequency and acts on the information processing system ( 2 ), runs though a rising or falling frequency spectrum and in the process for each input signal (X In ) a reaction signal is determined for the selected location in the information processing system ( 2 ) following the effect of the input signal (X In ) on the information processing system ( 2 ) over an effect period T, wherein for each input signal (X In ) at least the following method steps a) to d) are performed: a) a data processing unit ( 4 ) determining an effect of the input signal (X In ,), which is generated by an input signal generating unit ( 1 ), on the information processing system ( 2 ) during the effect period T, b) an output signal pick-up unit ( 3 ) detecting an output signal (Y Out ) associated with the selected location in the information processing system at different instants (Z t ) during the effect period T, wherein the respective output signal is brought about as a reaction to the effect of the input signal (X In ), c) the data processing unit ( 4 ) forming value triples (X In [=constant during T], Y Out , Z t ) from the input signal, which is constant during the effect period T, and the output signals Y Out , for the selected location, wherein each given effect instant (Z t ) in the effect period T, which is the respective instant of the measurement of the respective single output signal Y Out , is respectively assigned an output signal (Y Out ) for the selected location and the respective input signal (X In ,), which is constant during the effect period T, and d) the data processing unit ( 4 ) determining the reaction signal (Y OutMax ) for the selected location and the respective input signal (X In ) from the value triples (X In [=constant during T], Y Out ,Z t ), wherein the maximum or the minimum of the output signals (Y Out ) or a value in an interval ε around the maximum or the minimum of the output signals (Y OutMax ) which have the same input signal (X In ) in the effect period T is selected as the reaction signal (Y OutMax ); and, so the frequency spectrum with respective reaction signals (Y OutMax ) for ascending or descending input frequency values with pairs of values (X In , Y OutMax ) is generated by variation of the input signal (X In ), and in addition to the spectrum thus determined, the data processing unit ( 4 ) determining at least one resonant frequency from the input signals (X In ) as a further characteristic reaction parameter for the selected location in the information processing system.