IMPACT OF COMPUTING COMPONENTS ON MEASUREMENT ERRORS

2018;
: pp. 12-16
Authors:
1
State Enterprise “Research Institute of Metrology of Measuring and Control Systems”

In  this  paper  the  results  of  researches  of  errors  transformation  functions  of  input  data  for  various  types  of computing components of measuring systems are developed on the basis of the theory of finite automata. Depending on the type and value of  the  error  transformation  function of  the  input data or on  the metrological  state of  the  computing  components,  the errors of the measuring channels of the complex systems are inherent in the deterministic character of the changes both in the static and in the dynamic operation modes of the mentioned components. The major dependencies of the measurement results errors on the input data errors and on the types of the input data conversion functions are determined, and the results of their computation are presented.

For  iterative  procedures,  the  error  of  input  data  does  not  affect  the  final  result  of  measurement  and  its  accuracy. Measurement error depends on the number of iterations and decreases with its raise. Significantly interesting is the behavior of the errors transformation function for input data. First, its values  depend on the number of iterations, and secondly, mainly reducing the  errors  of  the  input data  from  the  number  of  iterations.  For  chains  of  a  sequential  structure,  it  can  be  concluded  the  linear dependence  of  the measurement  error  on  the  error  of  the  input  data. The  results  of  the  studies  of  the  parallel  structure  of  the computing components indicate an ability to invert the error sign of the input data.

Research of  the circuits with the cyclic structure envisages  that the similar dependence of  the measurement errors on the errors of the input data; the behavior of transformation function is characteristic for the above mentioned types of the computing components,  concerning  the  iterative  procedures.  The  difference  consists  in  the  next.  Computing  components  of  the  cyclic structure implement the so-called "spatial" iteration in contrast to the temporal, characteristic for such the components of the other structures.

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