SU1702403A1 - Apparatus to determine an optimal maintenance period for a product - Google Patents

Description

The invention is cleaned up to ointrol) and can be used in scientific research on it where the software is developed. The optimal periods of those processes with the products of their products and functions are expired.

 “KHOPHSTA” “H - Increase the price of a CTVI device for removing the trait that Gosley has restored the product cia to the user

Many of these systems (products) are functioning, as a duty officer. Translation of products in the cutting of the target “1”, and to dodge the sound in such a way, possible, and in the time On / .and v from E to ISLRPII R og from the moment leads to snatching out and target

For sub-products in a condition that is prone to the condition, they are periodically referred to technical maintenance, which includes monitoring of the condition, and repair and repair

. Hapa tzri-PIALA from gepy, in / out in the mode, is koe 1 at i / i, which can be matched with 10 tiouiPni e, C

-T "i

yy f% rednem iiO, o-HI-, then, ICH of the DIR in v-onie to the second eye of his; l i can (gpt in) .1b full one whole zadz "y

1 assignment is the first time of the fuzzing operation (op p (e pc .vpc product, ea kp-opy product) is not capable of a hypo, w “t fi pi t-ochtspt target task, but also nchchod r n sucked: .. 1 Ontrol and Ontrol and those who teach Ivanite

If control and technical equipment is used, the service of the ITB RPVOL is often, test period, the rj value of the frequency of the service providers should be serviced, and the time of operation of the TF 6v

little children. Therefore, the availability factor will also be small.

If monitoring and maintenance is carried out very rarely, i.e., with a long period, then the product may be in a state of failure for a long time and the time TF will again be small, therefore, Kg will be small.

From this it follows that there is such an optimal period of control and maintenance, at which the availability of the product reaches its maximum value. The natural desire of the pletters is finding this optimal period.

Let the product have to function continuously (fulfill its intended purpose) or be on duty D for time T, where time T acts as a limited resource that the product spends on useful (target) operation, on finding the product in a failure state, on failure recovery and control and maintenance. It is also known that, on average, time is spent on every inspection and maintenance of a product. Monitoring and maintenance are carried out at intervals of m, failures occurring in period r are detected only as a result of monitoring. On average, time is spent on product recovery when a failure occurs. The product being in a state of failure, control and maintenance, as well as restoration, cannot fulfill its intended purpose.

The balance equation on resource T can be written as

.t + y

y +

PMT)

Poisson process. Consequently,

t - / I (S) dS, where I (S) is intensively

the failure rate of the product at time S. Since the product is a highly reliable object and T xi r, xi y, the value of the first and second terms of the balance equation, taking into account the error, can be written as follows:

. Jljt

1 -c + y

I

ABOUT)

Е; Г () JI «Ј lr r,

1 1 ii

Using expressions (1) h (2), the balance equation can be written

N + (+ 5) -E1 (1)

 (3)

Expressing from this expression Tf and substituting its value in the formula Kg, we get

- + Ј + (W)

/A(e)./A(8)ds.(4)

Analyzing expression (4), it can be seen that the first three terms do not depend on m, therefore Kr as a function of m can be represented as follows:

(. + g-) +

t + y + 9- (T),

where r is the product inspection period;

the duration of the control and maintenance of the product;

B- the duration of the product repair; x | - expectation of time to failure i

(T) is the mathematical expectation of the number of failures per T.

Since after each failure only minimal repairs are made, it is known that {«(T); 0 T} is from itself

Kg (g) / A (s) dS, (5) where C is equal to:

 + Ј + Ј -Ь (..

With the final values of c and y with m = 0, the second term of expression (5) increases, hence Kg (g) decreases. As t increases, on the contrary, the third term of expression (5) increases. Consequently, there is such an optimal period of control of technical maintenance of the product, at which Ki (T) takes the maximum value.

The proposed model of finding the optimal m, which reaches the maximum of Kg, is implemented in hardware in the form of a device P.S. Since the aim is not to find Kg, P to determine the optimal period of control and maintenance, the value of C is not deducted.

The drawing is a diagram of the -close vcTponciRa,

The device contains a time sensor 1 (step voltage generator), the first adder 2, the second adder 3, the nonlinearity unit 4, the integrator 5, the first depenik unit 6, the second division unit 7, the multiplication unit 6 first register 9, the second register 10, comparator unit 11, key 12, recorder 13.

The device works as follows.

The time sensor 1 with charge A g sets, in order of increasing, the sequence of possible values of the interval t of monitoring and maintenance of the products m -1 - 1 + Ar where i 1, 2 .. N At each successive value m of m from the non-linearity block A, the function ( S) and sent to integray 5. From the second input of the device, the value of the upper integration limit T is fed to the second input of the intefather 5 and to the first turn of the first dividing unit 6 From the second output of time sensor 1, the time t is fed to the first input of the first adder 2 and the agora input first block 6 division. To the second input of the adder 2 and the second input of the slot 7 from the first input of the resistors to the post c; t htp time / C the output of the unit is about T |, -2T (fed ia the second input block 3 multiplications on the first input from which go ipt .-rztog- S3 sings / yy

j value j / (Ods (7)

about

With output b yukg-i 3 P | Yu1; expression of expressions (6) and (7) means the first input of the second sum with RL.

From the exit;. 2; first G: -1 in iio.gupapt on the first bypass of the eterego block 7 division, on the second - cotyrogs from the dog input vcTponcrr. -: signaling meaning: those from the output of the blond / ... jMGi .ne from / (r, -y-y) (W buys to the second B of the adder 3, from the output of which the sum of ITyrzzhpni (Qi and the expressions ( 6) and; 7) for a given time sensor 1, the value of m is borrowed to the input of the pergugal register 9 and to the second input of the comparison unit 11.

At the same time, the value previously recorded in the first register 9

it is transferred to the second register 10 and then fed to the first input of the comparison unit 11.

8, in the initial state, before starting the operation of the device, both registers are transferred to the zero state. Subsequently, in the transmission of information from the first pei of the territory of ne ne Combustion. The second registration register for the second register is deleted. In block 11 of the comparison, after the sensor 1 gives the time, the next value n is compared to the given value:

J4 ЈЈ (,) „

25

fj; 7 + i / A, S) ds,

one of which corresponds to the current value, G; a - peed isestg. The worst is i.

In case of such a result, say that

Ug, - g,

- --.:--.--- / l 3} s. -

a6ri-i-4-y T

 V, .. g i s, Ps, g, - / 2 i,

4ri then with perppo pyhog .: jflOK-j comparison you; 1 et, agglobe u-and the signal to the input .e 1 i progrm: rzzooch. r.shchy issuance of the queue value t s gm in the first case, t R. go to sleep

k) Hs

Y t, i-y

2 T

from vg-jporc inside b.choche 11 srepcheni pida- i v fruio-ou viH sig l ca sche 1 / congruency PRNP v, e rmg gn r - i Gspt from the third w cho, sensor I go from t to xo. i. tlltorp 3 Work in: tri-tpa at 5tg. - -. Spawns Tayu / m way, proposed a DEVICE FOR THE VOLST OF RISING A THOUGHT Ci t-:) for the period of the largest period

product maintenance by taking into account the development of the resource. If you select a monitoring and maintenance period other than Hopt, the availability factor value is reduced by

- D)

J

2T

t

/ I (s) ds (GSP) (T + U)

where t is the period of control and maintenance, provided that after restoration the product becomes new.

The frequency of control and maintenance of the product with regard to aging will be greater than the frequency of control and maintenance, provided that the product is new after restoration. Therefore, the economic effect of Sa from the implementation of the invention in comparison with the basic object can be estimated by the magnitude of the loss due to the untimely execution of work by an item that is in an undetected failure state.

This affect is expressed by the ratio

 t 9

I /. y / i g

Кн Г0пт r) U ° where Сn - the value of specific losses in case of non-fulfillment of work by the product;

KN is the normalizing factor;

One hundred - costs nz carrying out one-time control and maintenance.

Claims (1)

Invention Formula Device for determining the optimum maintenance period products containing a time sensor, the first output of which is connected to the input of the first adder, the second output of the time sensor through the nonlinearity unit is connected to the first input of the integrator, the second the input of which is the first input of the device, the output of the integrator is connected to the first input of the multiplication unit, the output of the first register through the second register is connected to the first input of the comparison unit, The second input is combined with the input of the first register, the first output of the comparison unit is connected to the input of the time sensor, the third output of which is connected to the first input of the key, the second input of which is connected to the output of the comparison unit, the output of the key is connected to the input of the recorder and the second adder, that, in order to improve the accuracy of the device, the first and second blocks are introduced into it dividing, the first output of the time sensor is connected to the first input of the first dividing unit, the second input of which is the first input of the device, the output of the first dividing unit is connected to the second input the multiplication unit, the output of which is connected to the first input of the second adder, the first inputs of the first adder and the second division block, are combined and are the second input of the device, the output of the second division block is connected to the second input of the second adder, the output of which is connected to the input of the first register.