DYNAMIC MEASUREMENT OF THE CURVE y(x) DEFINED BY PARAMETRIC RELATIONS x(t), y(t) UNDER RANDOM DISTURBANCES
Journal Title: Metrology and Measurement Systems - Year 2005, Vol 12, Issue 2
Abstract
Analog XY-recorders constructed as servomechanisms with sliding motion have been practically out of use for some time. Drawing the curve y(x) defined by parametric relations xz(t), yz(t) under additive, random disturbances is done by using measuring sensors with negligible dynamic properties, A/D converter card, computer and a printer, with a different time scale and with elimination of the influence of the dynamics of these devices . The influence of disturbances can be significantly lowered either by using special filters before storing the data in computer memory or by suitable processing of the data already stored in the computer memory. In the first case we have to choose an appropriate filter type and its time scale factor T, and in the second case - an appropriate processing mode in order to get the resulting curve Y(X) as close as possible to the theoretical curve y(x). Both techniques provide different possibilities and create different problems which require separate considerations.
Authors and Affiliations
ADAM ŻUCHOWSKI
Keywords
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