SU559198A1 - Reliability Prediction Device - Google Patents

Description

one

The invention relates to the field of computer technology and automation and can be used to build systems of increased reliability.

Devices are known, the disadvantages of which are that the prediction in them is carried out on the basis of the extrapolation of the realization of a random process for a period of time until the next control. Such extrapolation is applicable only to fairly smooth functions and allows one to presumably determine the value of a random variable within a time interval not exceeding the correlation period 1, 2,

It is also known a device comprising an adder connected to a control unit and a recording unit.

Its disadvantages are the narrow scope due to the fact that nIk nesting in it is carried out on the basis of an extrapolation of the implementation of a random process for predicting lines for short periods of time; unacceptable values of the predicted parameter are considered known and uniquely determined (deterministic)

decreases the class of objects in relation to which this device can be applied. In fact, in the overwhelming majority of cases, the limit value of the predicted value is uncertain or random. The drawback of the device is also the actuality of actuation.

Claims (3)

The purpose of the invention is to increase the speed of the device. This is achieved by including in the device a random process analyzer, a computing unit, a raising unit, a differentiation unit, a product unit and a corrector, the output of which is connected to the second input of the random process analyzer, which through the computing unit is connected to one input of the construction unit degree, the second input of which is connected to the output of the control unit and to one of the inputs of the adder, and the output - to the input of the product block, the second input of which is connected to the input of the su through the differentiation unit Matora whose output is connected to the recording unit. The drawing shows a block diagram of a device for predicting reliability, which contains a correlator 1, a random process analyzer 2, a computing unit 3, a raising unit to a power of 4, a control unit 5, a production unit 6, a di block (| 7, adder 8, registering bpoc 9. The reliability prediction of a technical object can be made hardware by implementing the expression (H) ljr, (v) f.dr. (x), is a reliability function or is likely where T l (ti) is that when external to an exploited device, the impact is not revisits the permissible; resistance distribution function, the basic and exhaustive characteristic of the permissible limit of the magnitude of the external effect that leads the device to failure; the greatest random impact on the time interval equal to the correlation period; the distribution function of the greatest external values of the impact on | - (- prediction depth, expressed in ° through the number of correlation periods of the external influence p - dT - the correlation period of the signal under study; The conditional distribution function of the external influence is related to the hypothesis that the limit (permissible) value of the action belonging to the element segment x-i.X x-i-dX, cjTA x) is the probability of the elementary hypothesis x + dx. The device works as follows. The information about the technical object under study, represented as a continuous electrical signal, is fed to the input of the correlator 1 and to the input of the random process analyzer 2. The autocorrelation function of the signal under study is determined at the correlator, and the correlation period dT. Correction period. The pia is set to the analyzer of the random i.e.cca 2, in which the 1 trace signal is divided into intervals d f and then in each of the resulting intervals the largest value is determined. Based on the selected maxima from the intervals of the signal under investigation, the calculating unit 3 determines the conditional probability T (x), which enters the raising unit to the power 4, where it is raised to the power And specified by the control unit 5. through the differentiation unit 7, information about the limiting possibilities of the device under investigation, presented as a distribution function Rlx, and another input receives a signal from the output of block 4, the product rfx determines the value rjx.) j -dT / (x) which is then summed k times in the adder 8, the output of which is connected to the registering unit 9. Formula of the invention A device for predicting reliability, comprising an adder connected to the control unit and the registering unit, characterized in that, in order to increase speed, a random analyzer is entered into it process, computing unit, exponentiation unit, differentiation unit, product unit and correlator, the output of which is connected to the second input of a random process analyzer, which through The slender unit is connected to one input of the exponentiation unit, the second input of which is connected to the output of the control unit and one of the inputs of the adder, the output to the input of the production unit, the second input of which is connected to the input of the adder through the differentiation unit with a recording unit. Sources of information taken into account in the extrastition of the invention: 1. Copyright certificate №207471, M.C. O-06 F 15/00, 1966. 2. Gaskarov, D.V., et al. Prediction of the technical condition and reliability of electronic equipment. M., Sov. Radio, 1974, p. 19O, fig. 1O, 4. 3. Copyright certificate №386399, Q01 R 31/30, 1970, (prototype). Rn ()