SU1472875A1 - Device for determining value of monitoring parameter - Google Patents

Abstract

The invention relates to computing and can be used to measure the parameters of complex objects, for example, to determine the values of dependent parameters, the measurement of which is prohibited. The purpose of the invention is to expand the functionality. The device contains sensors for controlling indirect parameters, subtraction blocks, multiplication blocks, blocks for setting constant coefficients, interval selection blocks, and an adder. The essence of the invention consists in the hardware determination of the value of the Y of the forbidden parameter from the measured values of the indirect parameters X _I - _Y , which are correlated with the forbidden. This automatically selects a portion of the nonlinear dependence Y (X _I ), in which the approximating linear polynomial has fixed coefficients. 4 il.

Description

one

The invention relates to computing and can be used to measure the parameters of complex objects, for example, to determine the values of dependent parameters, the measurement of which is prohibited.

The purpose of the invention is to enhance the functionality by determining the value of the forbidden control parameter for non-linear correlation between the parameters.

The essence of the invention is as follows.

In the process of using complex technical systems, their state (operable - inoperable) is determined by monitoring a certain amount of parameters. At the same time, there are a number of parameters that are highly informative, the direct measurement of which is impossible without stopping the operation of the systems for the intended purpose. In this case, the value of the value of the forbidden parameter can be determined by the value of the values of a number of allowed indirect parameters that have a certain correlation relation with the forbidden parameter. In the case of a nonlinear correlation, the latter is approximated using a broken line made up of tangent segments, the number of which is determined by the degree of nonlinearity of the correlation relation and a given approximation accuracy. AT

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xos equal to the expected value of the allowed indirect parameter X (Fig. 2) is tangent to the regression line Y Xx)

Y (x °) (xx °).

Defining the boundaries of the interval X., X .., within which the error

approximations do not exceed the specified:

Y-Y1 Ј f. Through points X

s, x hold tangents to the regression line, etc.

In mathematical terms, the task of determining the value of a forbidden parameter is reduced to solving a regression equation of the form:

mv (X ,, X2, ... (X;.) (X, -X, p,

where y is the mathematical expectation of the forbidden napaMeTpaY;

y (x ;;) is the coefficient of the regression equation of the 1st indirect parameter for which the condition

glch

V VX .j

Have

XG

where is X; - the measured value of the 1st indirect parameter; tangency point of the j-ro segment to the regression line of the 1st indirect parameter. FIG. 1 shows a functional diagram of the proposed device; in fig. 2 - an example of approximation of nonlinear dependence; in fig. 3 is a diagram of the block selection maximum; in fig. 4 is a block diagram for setting a constant coefficient.

The device contains sensors for controlling indirect parameters, subtraction blocks, multiplication blocks, the first 4j-4h and second 5, -5n blocks for setting constant coefficients, blocks-6, -6 interval selection, adder 7, third block 8 of the constant factor , indication element 9,

Each interval selection block 6 contains comparators 10, -10. ,, elements NOT llj-Ilv, elements AND 12, -12

Blon 4 or 5 of the constant coefficient setting contains adjustable voltage sources 131-13U and keys

14 „-14.

The device works as follows.

in a way.

0

five

0

five

five

0

50

In the initial state, in blocks 61-6h the thresholds for the comparators 10, -10t are set, which are proportional to the boundaries of the approximation intervals. On blocks 4, -4, the voltages Ux; j are set proportional to the values of the 1st indirect parameter on the jth approximation interval, for which the value of the forbidden parameter for a nonlinear correlation link exactly coincides with the value on this approximation interval, t. e. at the point of tangency of the curve and tangent. Voltages are set on blocks 51-5h. (X (-.) Is proportional to the values of the coefficients of the regression equation of the 1st indirect parameter in the jth interval. In block 8, a voltage of 1J3 is proportional to the expected value of the forbidden parameter Y.

In the process of operating the voltage device, proportional to the current values of the indirect parameters, from the sensor outputs, go to the second inputs of blocks 2, -2 and to the inputs of the corresponding blocks 6, -6ts, in which the corresponding indirect parameter is below the current value, go to single state. The signals from the outputs of the comparators 10., - 10U1 are fed to the inputs of the elements P., - 1 C NOT, from the outputs of which the signals go to the second inputs of the elements I 12., - 12, to the first inputs of which the signals from the outputs of the comparators are supplied.

Thus, at the output of the element 12, corresponding to the interval within which the current value of the indirect parameter x is located, there will be a single signal that goes to the corresponding control inputs of the keys, blocks 4, 4p and 5, -5 ,,,

The voltage from the corresponding sources k goes through the public keys l 4., -14k to the outputs of the first 4, -4h and second 5, -5p blocks of the task of constant coefficients. The first inputs of the blocks and the second inputs of the blocks 31-3 (1 receive the corresponding voltage Ux; j and Uyi, (x-). In blocks 2л-1 п, the operation 0 is produced

:

Ven.i ufi-uxij;

willows "iH | gi p

14728756

These coefficients, the outputs of the multiplication units are connected with the corresponding inputs of the adder, characterized in that, in order to expand the functionality, the device contains n interval selection blocks, the input and the control outputs of each of which are connected to the corresponding output the corresponding inputs of the adder 7, the sensor controlling the indirect parameter and with the driving inputs of the corresponding first and second blocks of setting constant coefficients, the output of the third block Each task of a constant coefficient is connected to the (pN) th input of the adder, the output of which is connected to the input of the display element, each interval selection block contains 20 k approximation intervals of k elements AND, k elements of HE, k + 1 comparators , the outputs of the elements And are associated with the control outputs of the interval selection block, the first input of each element is the Device for determining the value of 25 and is connected to the output of the corresponding adjustable comparator, and the second input - with the output of the corresponding element U, the input of each 1st of which Connected to the output of a 30 (il) -ro comparator, the comparison inputs of the comparators are combined and connected to the input of the interval selection block, each of the first and second blocks of the task of constant coefficients of the task of setting constant coefficients 35 of live controlled sources is connected to the inputs deductible ratio and k keys whose outputs

combined and are the output of the constant coefficient setting block, the outputs of the controlled sources at Voltage from their outputs go to the first inputs of the corresponding blocks 3, -3P, where the transformations are performed:

tW.-V.u.-j) (their, -iХ1) tu. (Xim). (.

on (n + 1) -th input of which the voltage Uy comes from the output of block 8. After adding in the adder 7, the voltage

U5Mx.4 / X ,, ..,} (U.-UX-i proportional to the estimate of the current value of the forbidden parameter, goes to display element 9, where it is displayed in a convenient form.

Claims (1)

Invention Formula neither control parameter, containing by the number n indirect parameters, n first and n second sets of constant coefficients, n sensors controlling indirect parameters, display element, n subtractors, n multiplicators, adder, third block of setting constant coefficients, information outputs of the first subtractive blasting blocks, the inputs of which are decremented and the outputs of which are associated respectively with the outputs of the corresponding sensors of control of indirect 40 yarns are connected to informational parameters and with the first inputs the corresponding inputs of the keys, the control inputs which are connected to the corresponding setting inputs of the block setting a constant coefficient. multiplication blocks, the second inputs of which are connected to the outputs of the corresponding blocks of the assignment constant (Sutl Have V2 13 X  IftJ X1 & 13t XtfjXu FIG. 2 13  X t Fig.Z