RU2222865C1 - Computer-aided diagnostic complex - Google Patents

Abstract

FIELD: measurement technology. SUBSTANCE: proposed diagnostic complex designed for troubleshooting and diagnosing intricate radio equipment and miscellaneous sophisticated inspection devices incorporates diagnostics entity, test action sources, output parameter meters, computer, and uncontrollable external action meters. EFFECT: enhanced reliability and precision of inspection; reduced hardware redundancy requirement. 1 cl, 3 dwg

Description

 The invention relates to the field of measuring equipment and can be used for monitoring and diagnosing malfunctions of electronic equipment, as well as other objects of control of various functional complexity and different operating principles.

 Known devices for monitoring and diagnostics, including a control object 1 (four-terminal), a source of input test (stimulating) effects 2 (control frequency generator), the output of which is connected to the corresponding input point of the control object 1, output informative parameters meter 3 ( comparison unit with the reference voltage unit), the input of which is connected to the corresponding measuring point of the output informative parameter of the monitoring object 1. The structural diagram of such a device Dehn 1. An example of such a device can serve as a well-known technical solution for ed. testimonial. USSR 587632, class H 04 B 3/46, 1978

The device of FIG. 1 works as follows. Before starting the control, on a working copy of the sample, measure the reference dependence of the values of the output informative parameters x _i ^E on the values of the input test (stimulating) influences y _j ^E , characterizing the reference values of the integral quality indicator W ^E of the control object within the range (W _min -W _max ) the existence of quality indicators of the control object. For example, when monitoring the receiving-amplifying path of the receiving devices as part of the monitoring device of FIG. 1 as a source of input signals 2, a generator of test high-frequency signals is used, which allows you to set the required values of the amplitudes U _I. As gauges informative output signals further comparator may be used oscilloscope selective microvoltmeter or other device performing the measurement of amplitudes U _O output signals. W quality indicator in this case is the value of the gain (K _y = U _O / U _Bx) for different points of the input dynamic range (U -U _{vhmin vxmakc)} quadripole controlled (control object). The reference characteristic of the control object W ^E = f (x _i ^E , y _j ^E ), previously measured for a working sample of the control object in the working range (in the range of its quality indicators W _min- W _max ), is stored and then used for sample control object of control of this type and purpose.

The control procedure using the devices of FIG. 1 includes measuring the current values of the quality indicator W of the control object (similar to that considered for measuring the reference characteristics of objects of control of this type) and then comparing the measured values of the quality indicator W _ij with previously obtained reference values W _iy ^E. If at the same points of the operating range (W _min -W _max ) the quality indicators W of the test object 1 deviation ΔW _{ij of the} measured values W _{ij of} the quality indicator (for the receiver, the gain K _i ) from the reference values of W _ij ^Э does not exceed the specified tolerances ΔW _ppm , then the control object is recognized as suitable for its intended use. If the deviation ΔW _{ij of the} measured values W _{ij of} the quality index of the control object from the reference values of W _ij ^E exceeds the established tolerances ΔW _ppm , then the control object is rejected. For the normal state of the object of control 1, the results of the control must satisfy the ratio
ΔW _ppm ≥ | W _ij -W $\genfrac{}{}{0ex}{}{\text{uh}}{\text{ij}}$ | = ΔW _ij .
The disadvantages of the known control device are the great complexity of control and the inability to use it to monitor the status of functionally complex objects having several points of input of input test (stimulating) effects at _j , several reference points of output informative parameters x _i , as well as a complex functional relationship between quality indicators W objects of control, parameters of stimulating effects y _j and output informative parameters x _i .

 A device is also known for monitoring the amplitude-frequency characteristics of quadripoles. This device is multi-channel and includes a control frequency generator, controlled by a four-terminal, the output of which is connected to the inputs of the first and second amplifiers, the outputs of which are connected respectively to the input of the bandpass filter and the inputs of the bandpass filters of the group, the output of the bandpass filter is connected to one input of the comparison unit, the other input of which connected to the corresponding output of the control frequency generator, and the output of the comparison unit is connected to the second input of the second amplifier, the outputs of the bandpass filters of the group connected to the first input of the group subtraction unit, the second input of which is connected to the corresponding output of the control frequency generator, the output of the subtraction unit is connected to the first input of the corresponding group comparison unit, the second input of which is connected to the output of the corresponding reference voltage unit of the group, the outputs of which are connected to the corresponding input of the element IHI, the output of which is connected to the input of the registration unit. (A device for monitoring the amplitude-frequency characteristics of the four-terminal circuits of auth. Certificate. 756653 class. Н 04 В 3/46, 1978).

This device is multi-channel, and its generalized block diagram is shown in figure 2. The number of sources of 2 test actions x _i and meters 3 of the output parameters for _j correspond to the number and characteristics y _{j of} controlled stimuli and output information parameters x _{i of} this type of control object 1. The device also includes a computer 4 that processes and records the results.

 In the device by ed. testimonial. 756653 the sources of 2 test influences are the control frequency generator, measuring instruments 3 of the output parameters - amplifier 4, bandpass filters 7 and subtraction units 8, and comparison blocks 5, reference voltage blocks 10 and registration unit 9 perform the functions of a specialized signal processing computer.

The device (Fig. 2), taken as the closest analogue, works as follows. Before starting to use the device, it simultaneously forms an array of reference values of test (stimulating) effects ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{j}}$ and the corresponding array of reference values of the output informative parameters ∑x $\genfrac{}{}{0ex}{}{\text{uh}}{\text{i}}$ , which is obtained in the process of checking the reference sample of the control object (the controlled sample with accurately known quality indicators W _ij corresponding to the normal state of the control objects of this type).

Further, when implementing the quality control procedure for samples of control objects of the same type, the next control object 1 with unknown quality indicators is connected as part of the multi-channel device of figure 2 to the outputs of the sources of test influences 2 and to the inputs of the meters of output parameters 3. In accordance with the program and by the method of checking the objects of control of this type, the inputs of the test object of control 1 using sources of test actions 2 are fed a combination of jy _j values of test actions. For each such combination ∑y _j , using the parameter meters 3, a set of ∑x _{i is} measured for the measured values of the output parameters, which are entered into the computer. After receiving each next array of ∑x _i values for a given set of test actions ∑y _j , the measured x _i and reference x _i ^Э values of the same informative parameters are compared. By the degree of coincidence of the measured values of x _i and the reference values of x _i ^E (by the value of deviations Δx _i ), a conclusion is made about the state of the inspected object of control 1 (serviceability or presence of deviations) and about the possibility of its use for its intended purpose.

The advantages of a multi-channel control device are: the possibility of its use for functionally complex control objects with a large number of stimulating effects y _j and a large number of output informative parameters x _i characterizing the current state W of the control object;
The disadvantages of the multi-channel device (figure 2), taken as the closest analogue, are:
the lack of accounting for uncontrolled external influences at _k (ambient temperature, atmospheric pressure, humidity, external electromagnetic fields, etc.) that affect the state of the control object, which reduces the accuracy of the assessment of real quality indicators;
the impossibility of a reliable assessment of the equivalent values of the deviation ΔW of quality indicators from the norm and comparing them with the specified tolerances ΔW _md , which leads not only to a decrease in the reliability of control of functionally complex objects, but also to large economic losses due to the high probability of erroneous interpretation of the control results;
hardware redundancy of the implementation of stimulating channels and channels for measuring output parameters due to the lack of consideration of the relationship (weighting factors) between the parameters (x _i , y _j , y _k ) and the quality indicator W of the control object, which leads to economic losses due to higher cost of sales control devices;
the absence of clear criteria for choosing the metrological characteristics of the channels according to the given requirements for the accuracy of assessing the state of the monitoring object (σW _m.dop ), which leads to a decrease in the reliability of quality control of functionally complex objects.

 The technical result from the use of the invention is to eliminate the disadvantages of the device of figure 2, adopted for the closest analogue.

где σW_мд - критерий точности устройства (выражаемый, например, через максимально допустимое значение среднего квадратического отклонения погрешности оценки показателя качества W объекта контроля),
(σx_i), (σy_j), (σy_k) - - частные критерии точности каналов x_i, у_j, у_k устройства (выражаемые, например, через максимально допустимые значения СКО погрешности соответствующих каналов устройства),

- весовые коэффициенты, учитывающие взаимосвязь значений параметров (х_i, y_j, y_k) и соответствующего им значения показателя качества (состояния) W объекта контроля, а динамические диапазоны (Δx_i, Δy_j, Δy_k) измерения (изменения) параметров в каналах, которые должна иметь аппаратура каналов (х_i, y_j, у_k) в составе устройства, соответствуют требованиям к заданному диапазону ΔW определения показателей качества данной группы объектов контроля

где

- динамический диапазон возможных изменений значений W показателя качества объектов контроля данной группы (в том числе с учетом возможных неисправностей),
[(Δx_i) = (x_iмакс-x_iмин)] - динамический диапазон возможных значений информативного параметра х_i, подлежащий измерению аппаратурой соответствующего канала устройства контроля;
[(Δy_j) = (y_jмакс-y_jмин)] - динамический диапазон возможных значений параметров тестовых воздействий у_j, подлежащих формированию аппаратурой соответствующего канала устройства контроля,
[(Δy_k) = (y_kмакс-y_kмин)] - динамический диапазон изменения параметров неуправляемого внешнего воздействия y_k, подлежащего учету с помощью аппаратуры соответствующего канала устройства контроля, причем взаимосвязь [W = f(∑x_i, ∑y_j, ∑y_k)] между определяемым значением W показателя качества (состояния) объектов контроля и параметрами (х_i, y_j, y_k), получаемыми в составе устройства контроля, используемая для определения требований к метрологическим характеристикам и динамическим диапазонам аппаратуры каналов устройства контроля по приведенным соотношениям, может иметь вид аналитических зависимостей, табличных (табулированных) форм описания зависимостей или любую другую форму, позволяющую оценить значения весовых коэффициентов

характеризующих взаимосвязь между значениями W показателей качества (состояния) объекта контроля и эквивалентными значениями соответствующих параметров (х_i, y_j, y_k), используемыми в устройстве контроля для оценки качества (состояния) данной группы контроля.The specified technical result is achieved by the fact that in an automated diagnostic complex that includes a control object, sources of test effects y _j connected by outputs to the corresponding inputs of the control object, output parameter meters connected by inputs to the corresponding outputs of the control object, electronic computers (computers) controlling the outputs of which are connected to the inputs of the sources of test effects, the inputs of which are connected to the outputs of the meters of the output parameters, and the computer output is the output of the complex, meters of uncontrolled external influences y _{k are} additionally introduced, the outputs of which are connected to the corresponding additional computer inputs, and the inputs are connected respectively to the inputs of the control object, and the composition and number of channels of the device correspond to the composition and types of parameters of test (controlled stimulating) effects at _j , uncontrolled external influences at _k and output informative parameters x _{i of} this group of objects of control, metrological characteristics of the channel equipment (σx _i , σy _j , σy _k ) meet the specified requirements (σW _MD ) for metrological characteristics of the assessment of quality indicators W of this group of objects of control, taking into account weight coefficients characterizing the relationship of parameters (x _i , y _j , y _k ) and quality indicator W of the control object

where σW _md is the accuracy criterion of the device (expressed, for example, in terms of the maximum permissible mean square deviation of the error in the estimation of the quality indicator W of the control object),
(σx _i ), (σy _j ), (σy _k ) - are particular criteria for the accuracy of the channels x _i , for _j , for _k devices (expressed, for example, through the maximum permissible deviations of the standard deviation of the errors of the corresponding channels of the device),

- weighting coefficients that take into account the relationship between the parameter values (x _i , y _j , y _k ) and the corresponding value of the quality indicator (state) W of the control object, and the dynamic ranges (Δx _i , Δy _j , Δy _k ) of measurement (change) of parameters in the channels that the channel equipment (x _i , y _j , y _k ) in the device must have, correspond to the requirements for a given range ΔW of determining the quality indicators of this group of objects of control

Where

- the dynamic range of possible changes in the values of W of the quality indicator of the objects of control of this group (including taking into account possible malfunctions),
[(Δx _i ) = (x _imax -x _imin )] - the dynamic range of possible values of the informative parameter x _i to be measured by the equipment of the corresponding channel of the monitoring device;
[(Δy _j ) = (y _jmax -y _jmin )] is the dynamic range of the possible values of the parameters of the test actions for _j to be formed by the equipment of the corresponding channel of the monitoring device,
[(Δy _k ) = (y _kmax -y _kmin )] is the dynamic range of variation of the parameters of uncontrolled external influence y _k to be taken into account using the equipment of the corresponding channel of the control device, and the relationship [W = f (∑x _i , ∑y _j , ∑y _k )] between the determined value W of the quality indicator (state) of the monitoring objects and the parameters (x _i , y _j , y _k ) obtained as a part of the monitoring device used to determine the requirements for metrological characteristics and dynamic ranges of the channel equipment of the monitoring device according to given with relations, it can take the form of analytical dependencies, tabular (tabulated) forms for describing dependencies, or any other form that allows you to evaluate the values of weighting coefficients

characterizing the relationship between the values W of the quality indicators (state) of the control object and the equivalent values of the corresponding parameters (x _i , y _j , y _k ) used in the control device to assess the quality (state) of this control group.

In FIG. 1 and 2 are diagrams of analog devices. Figure 3 shows the structural diagram of an automated diagnostic complex. It contains the control object 1, sources of 2 test actions y _j , meters 3 of the output parameters, computers 4, meters 5 uncontrolled external influences y _k . The inputs of the meters 5 uncontrolled external influences and the object 1 control, respectively, are combined and are the input of the complex. Another group of inputs of the control object is connected respectively to the outputs of the sources of 2 test actions, the inputs of which are connected to the corresponding outputs of the computer 4, the first and second groups of inputs of which are connected respectively to the outputs of the meters 3 of the output parameters and the meters 5 of uncontrolled external influences, the outputs of the control object are connected respectively to the inputs of the meters of the output parameters 3, and the computer output is the output of the complex.

 Software-controlled signal generators, digital-to-analog converters, etc. can be used as sources of test actions, depending on the type, structure of the control object and the control technique used.

 The output parameters can be measured with appropriate meters 3 and 5, which can be used as standard measuring instruments (measuring receivers with digital output, digital oscilloscopes, ADCs, signature and logic analyzers, etc.) suitable for measuring informative parameters inherent in a given type of object control.

 The complex works as follows.

Before using the complex, a reference sample of the control object of this type is connected to it as a control object 1. Based on the a priori known functional relationship between the quality index W of the control object and the parameters x _i , y _j , y _k according to the control program laid down in computer 4 and implementing the adopted control method, using the sources 2, one reference set подаютy is supplied to the control object $\genfrac{}{}{0ex}{}{\text{uh}}{\text{j}}$ test (stimulating) effects. Using meters 3 receive in computer 4 the set of measured reference values ∑x $\genfrac{}{}{0ex}{}{\text{uh}}{\text{i}}$ informative output parameters. At the same time using meters 5 get in computer 4 a set of reference values ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{k}}$ uncontrollable external influences. As a result, a reference array of parameters equivalent to the reference value of the quality index W ^Э of the test object 1 according to the relation W ^Э = f (x _i ^Э , y _j ^Э , y _k ^Э ) will be generated in the computer 4.

For those objects of control in which this relationship can be represented in the form of an analytical relationship, reference arrays (∑x $\genfrac{}{}{0ex}{}{\text{uh}}{\text{i}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{j}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{k}}$ ) can be obtained for each given value W ^{E of the} indicator of the state of the control object 1 by calculation and entered into the computer database 4 without using reference samples of the control object 1. In this case, the indicated analytical relationship plays the role of the reference mathematical model of this type of control object.

After the formation of the standard parameter arrays (∑x $\genfrac{}{}{0ex}{}{\text{uh}}{\text{i}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{j}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{k}}$ ) for each value of interest W for the quality indicator of the control object 1 complex is ready to assess the state of samples of control objects of this type.

В случае, если определенное по результатам контроля эквивалентное значение W_ijk показателя качества объекта контроля 1 отличается от соответствующего эталонного значения W^Э больше, чем это задано допусками (ΔW_мд) на контроль объектов данного типа, данный экземпляр объекта контроля бракуется.Each test sample of control object 1 is connected to sources 2 and to meters 5. After that, control object 1 using sources 2 operating under computer control 4 gives the set of actions задy _j specified in the control program that corresponds to the monitored value of quality indicator W. Using meters 3, a set of current values ∑x _{i of} informative parameters characterizing the current value W _{ijk of} the quality indicator of this sample of the control object 1 is _counted . Simultaneously, using meters 5 receive a set ∑y _{k of} current values of uncontrolled external influences. Based on the set of values obtained in computer 4 (∑x $\genfrac{}{}{0ex}{}{\text{uh}}{\text{i}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{j}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{k}}$ ) get an estimate of the equivalent value of W _ijk quality indicator
W _ijk = f (∑x _i , ∑y _j , ∑ _k ).
The deviation ΔW of the measured value of the quality index W _ijk from the reference value is determined and this deviation is compared with the specified tolerance ΔW _ppm by the ratio

If the equivalent value W _ijk determined by the results of the control is _{determined by} the quality indicator of the control object 1 differs from the corresponding reference value W ^E more than specified by the tolerances (ΔW _ppm ) for the control of objects of this type, this instance of the control object is rejected.

In order to diagnose the reasons for the deviation of the quality indicators of the control object (diagnostics of malfunctions - for technical objects, diagnosis of diseases - to monitor the condition of the patient in medicine), further more detailed qualification of the state of the control object is carried out on the basis of the use of appropriate criteria diagnostic samples. To this end, before using the device in the computer database 4 as reference arrays (∑x $\genfrac{}{}{0ex}{}{\text{uh}}{\text{i}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{j}}$ ∑y $\genfrac{}{}{0ex}{}{\text{uh}}{\text{k}}$ ) sets of parameter values are entered not only for the normal state of the monitoring object of this type, but also for various options for deviation from the norm. The correspondence is established between these sets of parameter values and the causes that cause a corresponding deviation from the norm (for technical objects, types of malfunctions, for medicine, types of diseases). The indicated aggregates are nothing but diagnostic samples of corresponding deviations from the norm (corresponding malfunctions - for technical objects of control).

 In this case, after the fact of the deviation of the given sample of the control object 1 from the normal state is established from the control results, the computer searches for a criterial diagnostic image, the set of parameters for which coincides with the measured set. If an appropriate diagnostic sample is found, the reason for the deviation of the properties of the control object 1 from the norm is determined (type of malfunction - for technical objects, type of disease - for the patient’s body) and measures are taken to eliminate the established deviation (for technical objects, instructions are given to eliminate the detected type of malfunction in medicine formulate recommendations on the methodology and means of treating the diagnosed disease).

 The technical implementation of the elements of the complex is carried out using equipment based on well-known technical solutions. The main requirement is the choice of metrological characteristics of equipment 2, equipment 3, equipment 5, as well as the dynamic ranges of these parameters. The overestimation of the requirements for the metrological characteristics of equipment 2, 3, 5, as well as to the dynamic ranges of measurement (formation) will lead to a rise in the cost of the device - to economic losses. Unreasonable underestimation of these requirements will lead to a decrease in the reliability of control and to the resulting economic losses.

учитывающих взаимосвязь соответствующих параметров (х_i, y_j, у_k) и показателя состояния W объекта контроля. Это требование обеспечивается по соотношению

где (σW_мд) - критерий точности установки (например, максимально допустимое значение среднего квадратического отклонения погрешности оценки показателя состояния объекта контроля);
(σx_i, σy_j, σy_k) - - соответствующие частные критерии точности, которым должна удовлетворять аппаратура 2, 3 и 5.To optimize the parameters of equipment 2, 3, 5 as part of a multichannel device, the metrological characteristics of the channels (σx _i , σy _j , σy _k ) must satisfy the specified requirements for the metrological characteristics of the state monitoring (σW _md ) of the control object, taking into account weight coefficients

taking into account the relationship of the corresponding parameters (x _i , y _j , y _k ) and the state indicator W of the control object. This requirement is provided by the ratio

where (σW _md ) is the criterion for the accuracy of the installation (for example, the maximum allowable value of the mean square deviation of the error in estimating the state indicator of the object of control);
(σx _i , σy _j , σy _k ) - are the corresponding particular accuracy criteria that equipment 2, 3, and 5 must satisfy.

аппаратуры 2, 3 и 5 должны соответствовать требованиям к динамическому диапазону ΔW контроля показателя состояния объекта контроля ΔW = |W_макс-W_мин|.
Это требование в устройстве обеспечивается на основе учета весовых коэффициентов

взаимосвязи параметров аппаратуры 2, 3, 5 и показателя качества W объекта контроля 1 по соотношению

где (ΔW_мд = |W_макс-W_мин|) - заданный динамический диапазон контроля показателя качества W объектов контроля данного типа с помощью диагностического комплекса;
(Δx_i = |x_макс-x_мин|), (Δy = |y_макс-y_мин|) - динамические диапазоны измерения выходных информативных параметров х_i, формирования воздействий y_j и учета неуправляемых внешних воздействий y_k (требования, которым должна удовлетворять аппаратура 2, 3 и 5).Similar to dynamic range requirements

equipment 2, 3 and 5 must meet the requirements for the dynamic range ΔW of the control indicator of the state of the control object ΔW = | W _max -W _min |.
This requirement in the device is provided based on weighting factors.

the relationship of the parameters of the equipment 2, 3, 5 and the quality indicator W of the object of control 1 in the ratio

where (ΔW _md = | W _max -W _min |) is the specified dynamic range of control of the quality indicator W of objects of control of this type using the diagnostic complex;
(Δx _i = | x _max -x _min |), (Δy = | y _max -y _min |) - dynamic ranges for measuring the output informative parameters x _i , forming influences y _j and taking into account uncontrolled external influences y _k (requirements that must satisfy equipment 2, 3 and 5).

 When fulfilling the specified requirements for equipment parameters 2, 3 and 5, the complex will provide the necessary efficiency and reliability of control of functionally complex (multi-parameter) control objects at optimal implementation costs.

 The technical result from the use of the invention is to increase the efficiency and reliability of control of functionally complex objects, including reducing the cost of implementing control and reducing the duration of control compared to known devices of a similar purpose.

 The complex can be applied in various branches of technology, medicine and other areas of human activity.

При этом функциональная взаимосвязь между показателем состояния W и соответствующими параметрами (х_i, y_j, y_k) вида
W = f{∑x_i, ∑y_j, ∑y_k}
может иметь форму аналитических зависимостей (математические соотношения, логические соотношения), табличную форму или любую другую форму, позволяющую оценить значения соответствующих весовых коэффициентов

оThe adaptation of the complex for a specific field of application consists in formalizing the description of the relationship between the quality indicator W of a specific group of objects of control and the corresponding set of parameters (∑x _i , ∑y _j , ∑y _k ), according to which the current values W _{ijk of} indicators of the state of the object of control should be estimated - taking into account their weighting factors

Moreover, the functional relationship between the state indicator W and the corresponding parameters (x _i , y _j , y _k ) of the form
W = f {∑x _i , ∑y _j , ∑y _k }
may take the form of analytical dependencies (mathematical relationships, logical relationships), a tabular form, or any other form that allows you to evaluate the values of the corresponding weight coefficients

about

Claims (1)

An automated diagnostic complex including a test object, sources of test effects y _j connected by outputs to the corresponding inputs of a test object, measuring instruments of output parameters connected by inputs to the corresponding outputs of a test object, an electronic computer (computer), the control outputs of which are connected to the inputs of the sources of test actions the inputs of which are connected to the outputs of the meters of output parameters, and the computer output is the output of the complex, characterized in that in it meters of uncontrolled external influences y _{k are} introduced, the outputs of which are connected to the corresponding additional inputs of the computer, and the inputs are connected respectively to the inputs of the control object, and the composition and number of channels of the device correspond to the composition and types of parameters of test controlled stimulating effects y _j , uncontrolled external influences at _k and output informative parameter x _i of the given group of control objects metrological characteristics channels apparatus (σh _i, σu _j, σu _k) correspond to specify t ebovaniyam (σW _ppm) to metrological characteristics of quality evaluation indices W control objects of this group with the weighting coefficients characterizing the interrelation of parameters (x _i, y _j, y _k) and a quality indicator control object W

where (σW _md ) is the accuracy criterion of the device, expressed, for example, in terms of the maximum permissible mean square deviation of the error in the estimation of the quality index W of the control object, (σx _i ) (σy _j ) (σy _k ) particular criteria for the accuracy of the channels x _i , y _j , y _k devices, expressed, for example, through the maximum permissible standard deviation errors of the corresponding channels of the device,

- weighting coefficients, taking into account the relationship between the parameter values (x _i , y _j , y _k ) and the corresponding value of the quality indicator of the state W of the control object, and the dynamic ranges (Δx _i , Δy _j , Δy _k ) of measurement (change) of parameters in the channels, which the channel equipment (x _i , y _j , y _k ) must have in the device, correspond to the requirements for a given range ΔW of determining the quality indicators of this group of objects of control

where [(ΔW _max ) = (W _MAX- W _min )] is the dynamic range of possible changes in the values of W of the quality indicator of the objects of control of this group, including taking into account possible malfunctions;

- the dynamic range of possible values of the informative parameter x _i to be measured by the equipment of the corresponding channel of the monitoring device; [(Δу _j ) = (for _jmax -y _jmin )] is the dynamic range of the possible values of the parameters of the test actions y _j to be formed by the equipment of the corresponding channel of the control device; [(Δy _k ) = (at _kmax -y _kmin )] is the dynamic range of variation of the parameters of uncontrolled external influence y _k to be taken into account using the equipment of the corresponding channel of the monitoring device.

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