Современные информационные технологии
INCREASING ACCURACY USING TEST
INFORMATION MEASURING SYSTEMS
Mammadov R.Q., Mehdizade E.K.,
Allahverdiyev R.N.
Abstract - The management information system being a basis is
developed and made by preparation of a concrete mix of information-measuring
systems. Analyzed problems of modern technological processes.
Keywords
- information-measuring systems, technological processes, algorithmic method, test method.
Introduction. Modern
level of industrial production and carrying out of research experiments makes
more and more rigid demands to metrological to characteristics used measuring
apparatuses. Already today at measurements of variety of electric and not
electric sizes it is necessary to provide the accuracy of received results
comparable to accuracy of exemplary measures.
Problem decision. Recently wide development is received by algorithmic
methods of increase of accuracy of the measurements, based on use of
mathematical modeling, specialized computer aids and realization of special
algorithms of processing of results of measurements.
The essence of the specified methods is reduced to
reception of the additional information, allowing realizing algorithm of
increase of accuracy of measurements. Construction of information-measuring
systems (IMS) on the basis of these methods allows to provide in some cases
high accuracy results at use low doted initial measuring systems.
Thus development of algorithmic methods of increase of
accuracy of measurements is conducted in two basic directions:
- developing
methods of reduction of the correlated component of an error of measurement
uniting practically all regular, progressing and slow-changing (concerning an
interval of time necessary for realization of algorithm of measurement, provided
by the chosen method) casual errors;
- developing
methods of reduction of not correlated component of an error of measurement
uniting all high-frequency casual errors, caused, for example, noise of
electronic elements of the measuring converters which are a part of measurement
system.
It is necessary to notice, that working out of methods
of reduction of the correlated component of an error has special value for IMS
not electric sizes. This results from the fact that accuracy such IMS,
basically, is defined by accuracy of primary converters of not electric sizes
used in them and intermediate unifying measuring converters for which the
correlated making errors connected with admissions on a detail and knots,
change of parameters of their functions of transformations in time and
depending on external conditions, have prevailing value.
Among algorithmic methods of reduction of the
correlated components of an error of measurement of not electric sizes the most
universal and effective are test methods. Realization of these methods provides
reception of the additional information at the expense of measurements of
sizes-tests specially generated on input to measuring systems. Results of
measurements of tests allow to define by means of special algorithms of their
processing current values of parameters static functions of transformation of
system and, finally, to exclude their influence on accuracy of results of
measurements of entrance size 
measuring
systems.
The basic
feature of the specified methods consists that formation of tests is carried
out by means of the most measured size 
. It
allows not to disconnect in process of carrying out of additional measurements
the measured size 
from input of measuring systems. Thus the
most universal is the method using additional measurements simple additive 
and multiplication 
of
tests.
However, efficiency of a test method of increase of
accuracy of the measurements, realized on the basis of additional measurements
of simple additive and multiplicative tests, decreases at use in test
information measuring systems (TIMS) converters with essentially nonlinear
functions of transformation.
Thus,
application of the developed ways of construction of algorithms of functioning IMS
allows along with advantages which are characteristic for TIMS, realized on the
basis of simple additive and multiplicative tests, to receive in new updating
of test systems a number of new qualities. The cores from them the following:
- Simplification of algorithms
of work. Allowing to define size 
to results of additional measurements of the
tests used for identification of nonlinear functions of transformations of IMS;
- Considerable decrease in
number of the used constant making tests necessary for identification of
nonlinear functions of transformations of IMS;
- Essential simplification of procedure of
linear functions of transformations test of IMS with nonlinear functions of
transformation at the expense of reduction of number of measurements of
additional tests necessary for its realization.
Сonclusion. On the basis of the spent
researches pre-production models of system of the centralized control of
temperature of a hydraulic engineering construction have been developed and
made; the management information system being a basis is developed and made by
preparation of a concrete mix of information-measuring systems.