The method of a phase shift angle measurement using conditional averaging of delayed signal absolute value (CAAV) is presented in this paper. The input sinusoidal signal x(t) is without noise. White noise with normal distribution and band limited to low frequencies has been applied as disturbance of delayed sinusoidal signal z(t). Noise n(t) - N(0, σn) is added to the delayed signal - the noised and delayed signal z(t) is obtained. The phase angle shift is proportional to time location of CAAV's minimum (minimum of the characteristic of conditional averaging of delayed signal's absolute value). The phase angle shift can be determined on the basis of conditional averaging value of elaborated algorithm. The characteristics of conditional average of delayed signal's absolute value in the surrounding of the minimum of this function (the results of practical investigations and theoretical calculation) are presented. The experimental variance of characteristic CAAV in surroundings of the minimum (obtained from practical investigations and calculation) is illustrated in the paper. The algorithms of conditional averaging have been elaborated and practically realized in the LabVIEW environment.

JO - Metrology and Measurement Systems L1 - http://journals.pan.pl/Content/89755/PDF/Journal10178-VolumeXVIII+Issue1_13+paper.pdf.pdf L2 - http://journals.pan.pl/Content/89755 IS - No 1 EP - 144 KW - phase angle shift KW - additive disturbance KW - conditional signal averaging ER - A1 - Kowalczyk, Adam A1 - Szlachta, Anna PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation JF - Metrology and Measurement Systems SP - 137 T1 - Algorithmic Method for Phase Angle Shift of Noisy Voltages Using Conditional Averaging of Delayed Signal's Absolute Value UR - http://journals.pan.pl/dlibra/docmetadata?id=89755 DOI - 10.2478/v10178-011-0013-4