Patent ID: 6697746
Filing Date: 2004-02-24
Classification: G01M,G01N,G11B

Abstract:
A control system for a failure mode testing system having a determinable system response, wherein the testing system includes a plurality of actuator cylinders, each cylinder operating at an initial pressure and an initial frequency, wherein the frequency of each of the cylinders is different, comprising:a) selecting a desired energy level of the system response; b) selecting a desired slope of the fast Fourier transform of the system response; c) changing an operational parameter of the cylinders by a pre-selected amount in order to create a first pressure/frequency condition, wherein the operational parameter is selected from the group consisting of pressure, frequency, and combinations thereof; d) determining the system response in terms of energy and slope of the fast Fourier transform of the system response under the first pressure/frequency condition; e) storing the system response determination of the first pressure/frequency condition in a data storage medium; f) changing an operational parameter of the cylinders by a pre-selected amount in order to create a second pressure/frequency condition different from the first pressure/frequency condition; g) determining the system response in terms of energy and slope of the fast Fourier transform of the system response under the second pressure/frequency condition; h) storing the system response determination of the second pressure/frequency condition in a data storage medium; i) changing an operational parameter of the cylinders by a pre-selected amount in order to create a third pressure/frequency condition different from the first and second pressure/frequency conditions; j) determining the system response in terms of energy and slope of the fast Fourier transform of the system response under the third pressure/frequency condition; k) storing the system response determination of the third pressure/frequency condition in a data storage medium; l) changing an operational parameter of the cylinders by a pre-selected amount in order to create a fourth pressure/frequency condition different from the first, second, and third pressure/frequency conditions; m) determining the system response in terms of energy and slope of the fast Fourier transform of the system response under the fourth pressure/frequency condition; and n) storing the system response determination of the fourth pressure/frequency condition in a data storage medium.