SU1203539A1 - Device for determining size of restoration resources of industrial object - Google Patents

Description

2. The device according to claim 1, characterized in that the resource level selection node contains the first block of the constant coefficient setting, the NOT element, the OR element, the fourth prohibition element, as well as the branches for calculating the number of spare elements of one resource level, each of which includes the second prohibition element, the second block of the fixed coefficient setting, the comparison element, the single vibrator, the counter and the decoder, and each branch, besides the first one, contains the third interdiction element, the output of the first block of the fixed coefficient setting is connected input of the fourth prohibition element, the output and control input of which are associated respectively with the first inputs of the comparison elements and the output of the NO element connected to the control inputs of the second prohibition elements whose information inputs are connected to the outputs of the corresponding Invention relates to computing technology and can be used for the study of random recovery processes, for example, to determine the number of spare blocks that ensure the proper functioning of a technical device.

The purpose of the invention is to make it possible to determine the number of different types of spare blocks necessary to restore a technical object within a set time.

Figure 1 shows the functional diagram of the device; Fig. 2 is a functional diagram of a level selection node; FIG. 3 is a functional diagram of an exponential pulse generator; FIG. 4 shows timing diagrams of the device operation.

The device contains exponential pulse-shaper generators random voltage generators, multiplication blocks, threshold blocks 4) -4f ,, nodes 5, -5f, knocking out second blocks of setting constant coefficients, outputs of the second prohibition elements, except for the first branch, are connected via third prohibition elements with the second inputs of the corresponding comparison elements, the output of the second prohibition element of the first branch is connected with the second INPUT of the comparison element of this branch directly, the output of each comparison element is connected to the input of the corresponding monoflop and the control inputs of the third elements prohibition of subsequent branches odnovib- tors outputs are connected with the Accounts E vho- da.sh; the corresponding counters and the inputs of the OR element, the output of which is the control output of the node, the zero reset outputs of the counters are connected to the fault input of the node, and the outputs of the counters are connected to the information outputs of the node through corresponding decoders.

five

0

five

 Level ratios, blocks 6, -6p of indication, generator of 7 clock pulses, frequency divider 8, first barring elements 9 and a constant voltage setting unit 10.

The level selection unit 5 contains the first block 11 of the task of a constant coefficient, elements of comparison, one-shot 13, -13 | /, counters 14, -14j ;, decoders 15, -15, the second elements 16, -16k of the prohibition, the second blocks of the task constant coefficients, third prohibition elements 18c, fourth prohibition element 19, NOT element 20, and element OR 21.

Shaper 1 contains a resistor 22, a storage capacitor 23 and a switch 24.

The essence of the invention is that the simulation determines the number of failures of each block of a technical device for a given period of operation T. Restoration can be done by elements of different levels (primary elements

you, functional elements, constructive blocks, etc.). In this case, the recovery time is different. For restoration, the element of the lowest level is selected for which the recovery time is less than permissible. Thus, the spare set is made up of elements of different levels and allows you to recover in the allowable time with the lowest economic costs.

The exponential pulse builder 1 is an RC-string, with an electronic switch connected in parallel to the capacitor. It realizes the probability of failure of the i-th block of a technical device according to the law, where L; - failure rate. The law is realized due to the charging process of the storage capacitor 23, the rate of change of the exponential is regulated by changing the size of the capacitor 23. The electronic switch short-circuits the capacitor (discharging it) when the control pulse arrives from the first output of the node 5 through element 9.

Random voltage generators are noise generators made according to well-known circuits containing a semiconductor element and an amplifier as the primary source of noise. Together with the blocks, they provide a simulation of the random process of changing the MOUTH. Nodes 5 (-5f, level choices provide an unambiguous choice of such elements that can eliminate the failure in less than the specified time. The level analysis starts with the lowest element whose recovery time is the longest. If it is more than the allowable, then an element of a higher level is chosen, whose recovery time is shorter than that of the previous one. If this time is longer than the allowable one, the element that follows the level, etc. until the recovery time (s;) becomes less than the allowable (Td).

Blocks 6, -6 „displays contain each K digital indicators. - Generator 7 is a typical pulse generator with a control input. Upon receipt of the inhibit signal, the pulse sequence is absent at its output.

035394

 The device works as follows.

The change in time of the probability of failures under the law of the PD {-e all

5 blocks of the technical device are simulated by the formatter n 1. A constant voltage is supplied from the output of the 10n block to the capacitors 23. The storage capacitors are charged, and the charge time constant of each driver is different from the others and corresponds to the failure rates -D; i-th block of the technical device. Thus, the probability of failure of each block varies with its speed in accordance with L; (figa, 5, -K).

The random nature of the change in the probability of failure is modeled by the voltage multiplier — on the capacitor 23 with the randomly varying voltage of the generators,. Multiplication is done in blocks 3, -3 | ,. Upon reaching the output of block 325, the voltage Id (where id is the voltage of the logical unit), the output of the threshold unit 4j appears the voltage of the logical unit (Fig. 45), which is fed to the input of the node 5-. AT

JQ in accordance with the logic of operation of the node 5j at its defined second output (depending on the selected level of the spare element) a signal appears, which is displayed on the indicator 6; . A unit is displayed on the indicator, indicating that the element of the selected level for the i-th block is to be included in the stock. At the same time

, Voltage from the first output of node 5; 40p.

supplied through element 9, to the control key input 24, -. The capacitor 23 is discharged, and the simulation of the further operation process begins.

At time ti, (figure 4) there is a failure of the first block of the technical device. In a similar way, as for the i-th block, the level of the element necessary for inclusion in the stock is determined. A display of the unit of a certain level and the discharge of the capacitor 23 in the block occurs on the indicator. At time i occurs

55 second failure of the i-th block. The device operates in the same way, and a deuce is displayed on the indicator 6, indicating that there is a need to include a network in the stock of the second element of the same level for the i -th block.

The operation of the device occurs in such a way until the current 3-day time does not increase the specified period of operation C,).

The time Td is set by changing the division factor of the divider 8. The restructuring occurs by connecting or disconnecting additional triggers to the shift register. At the moment of the simulation start, the generator 7 is started, the pulse sequence from which is fed to the input of the divider 8.

After the arrival of the number of pulses proportional to T at the output of the frequency divider 8, a signal arrives at the control inputs of the generator 7 and elements. In this case, the output of pulses from the generator 7 is stopped and the passage of signals from the first outputs of the nodes through the elements 9, -9 is prevented (to the discharge of the capacitors 23 in the formers 1, -1.

The indicators 6-6 shows the number of elements of the selected level for each block of the technical system, which must be kept in stock to restore the system within the allowable time for a given period of operation.

To provide a new simulation cycle, a reset pulse is applied, which clears the counters and 14 ' and frequency divider 8.

The level selection unit 5 operates as follows. In the initial state, the values of the allowable recovery time are entered into block 11 and the values of the recovery time by elements of different level P blocks 17j-17, and c, rh .., rd ..,. those. In block 17x, the recovery time for the element of the highest level is entered. Blocks 11 and 17, -17x are adjustable constant voltage sources.

In case of failure, the potential of a logical unit from block 4

enters the input of the element NOT 20, is inverted into zero, which enters the prohibitory inputs of the elements 19 and 16 / (- 16p, thereby permitting the comparison of Td and o-g

If Og - h 5, then the output of element 12 is the voltage of the logical unit that is applied to the prohibiting inputs of the elements, thereby prohibiting the choice of elements from the second to the - and level. From the element output, the potential of the logical unit is fed to the input of the one-oscillator 13, which generates a single pulse. After recording the pulse to the counter 14 (information about the number of pulses is decrypted by the decoder 15i and from its corresponding output goes to the indicator 6.

20

If a

Tp

then at the exit

ment 12j is the voltage of the logical nup. Consequently, at the forbidding input of the element 18, the voltage of a logical zero and a comparison of s-d and Ta takes place. If Gd Tn, then the information from the corresponding output of the decoder 15 to the indicator -6, is read in the same way. T starts working the third level of comparison, etc.

Before simulating a new cycle of operation, after replacing the failed element, it is necessary to discharge the storage capacitor 23 of unit 1 via key 24. The control signal is fed from the output of the one-oscillator 13, through the OR 21 element.

After the end of operation, the counter 14, -14c is cleared by a reset signal applied to their zeroing inputs.

The positive effect of the implementation of the invention lies in the fact that, if the condition g is met, the total cost of the accumulated recovery resources will be the smallest of all possible, since the cost of higher level elements that can be included in the stock when the condition os is met; -iTn, above defined in the process of the device.

Kb

Claims (2)

1. DEVICE FOR DETERMINING THE SIZE OF RESOURCES FOR RESTORING A TECHNICAL OBJECT, containing circuitry for modeling failure of blocks of a technical object, each of which consists of an exponential pulse shaper, an indicator and a random voltage generator connected in series, a multiplication block and a threshold block, the output of the exponential pulse shaper is connected to the second input multiplication unit, the power inputs of the formers of exponential pulses of all circuits are connected to the output of the constant voltage, which means that, in order to ensure the possibility of determining the number of spare elements of various levels for the restoration of a technical object, it contains a clock pulse generator, a frequency divider and in each circuit a first inhibit element and a resource level selection node controlling and the information outputs of which are connected respectively to the control input of the first inhibit element and information inputs of the indicator, the control inputs of the first inhibit elements are connected to the output of the frequency divider and control vlyayuschim input clock pulse generator output connected to the data input of the frequency divider, a reset input node resource selection level associated with the reset input of the frequency divider. 2. The device according to claim 1, characterized in that the resource level selection node comprises a first constant coefficient setting unit, an NOT element, an OR element, a fourth prohibition element, and also branches for calculating the number of spare elements of one resource level, each of which includes a second element prohibition, the second block sets the constant coefficient, the comparison element, one-shot, counter and decoder, and each branch, except the first, contains the third element of the ban, the output of the first block sets the constant coefficient is connected to. the information input of the fourth prohibition element, the output and control input of which are connected respectively with the first inputs of the comparison elements and the output of the element NOT connected to the control inputs of the second prohibition elements, the information inputs of which are connected to the outputs of the corresponding second blocks for setting constant coefficients, outputs of the second prohibition elements, in addition to the first branch, connected through the third elements of the ban with the second inputs of the corresponding elements of comparison, the output of the second element of the ban of the first branch of it is connected with the second-input of the comparison element of this branch directly, the output of each comparison element is connected to the input of the corresponding one-shot and control inputs of the third elements of the ban of subsequent branches, the outputs of the one-vibrators are connected to the counting inputs of the respective counters and the inputs of the OR element, the output of which is the control output of the node, the outputs resetting the counters is connected to the dump input of the node, and the outputs of the counters through the corresponding decoders are connected to the information outputs of the node. ί