G - Physics – 05 – B
Patent
G - Physics
05
B
324/36
G05B 23/02 (2006.01) G01R 27/28 (2006.01)
Patent
CA 1041173
NOISE BURST SOURCE FOR TRANSFER FUNCTION TESTING Abstract of the Disclosure A method and apparatus for accurately measuring the transfer function of a linear system or the linear part of a non-linear system. This is accomplished by using a spectrum estimation technique which utilizes a "transient random" stimulus consisting of a short burst of random signals applied to a system under test for a period of time that is shorter than the time used to measure a single spectrum. Thus the measurement period includes the time for the "transient random" burst and for the response of the system to substantially decay to zero. The spectrum measured over this period is used to form a first estimate of the transfer function. Other "transient random" stimuli, uncorrelated with the prior records, are then generated and the above procedure is repeated to achieve an average value for the transfer function estimate of the desired accuracy. Through the use of several "transient random" stimuli, leakage and distortion in the measurement are minimized, thus greatly improving the accuracy of the estima- tion technique in measuring the transfer function of the system under test.
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