SU1444806A1 - Arrangement for simulating production system - Google Patents

Abstract

The invention relates to the field of computer technology and can be used in the study of multiphase technological processes in flexible automated production systems. The purpose of the invention is to improve the accuracy of modeling by taking into account the numerical values of the interfacial drive reliability indicators. The device contains two blocks of random pulse generators, a block of clock generators, a registration block, a model of the production system, a summing counter and a decoder. The device makes it possible to obtain statistical data on the quality of functioning of the designed systems, taking into account the state of equipment of individual sections of the production system and interphase stores. 2 Il. with (O. (L

Description

The invention relates to computing and can be used in the study of multiphase technological processes in flexible automated production systems.

The purpose of the invention is to improve the accuracy of modeling by taking into account the numerical values of indicators of the reliability of interfacial drives.

FIG. 1 shows a diagram of the device; in fig. 2 - diagram of the simulator section of the production system.

The device for modeling production systems contains the first 1 and second 2 random pulse generator blocks, the block 3 of the clock generators, the model 4 of the production system, the block 5 of the recording, the summing counter 6, the decoder 7.

Model 4 of the production system contains simulators 8 sites of the production system, the first 9 and second 10 elements I.

Block 5 registration consists of elements And 11, 12, the element is NOT 13 and three summing counters

Each of the simulators of the production system section contains the third element I 17, the element NOT 18, the first - the fourth triggers 19-22, per, 23, the second 24 elements I, the first - the third one-shot 25-27, the reversible counter 28, the decoder 29, the first 30, the second 31 blocks of elements 2I-INR, the fourth 32 and the fifth 33 elements I.

At the outputs of the generator unit 1, sequences of random pulses are formed, the duration of which is proportional to the uptime of the equipment of the sections, and the duration of pauses between the pulses of the recovery time.

At the outputs of block 2 of the generators, sequences of random pulses are formed, the duration of which is proportional to the time of reliable operation of interphase accumulators, and the duration of pauses between the pulses - the time to restore their operation.

At the first output of the unit, 3 clock generators form a sequence of pulses, the frequency of which sets the time scale in which

the simulation process, on the second - a sequence of pulses, the frequency of which is proportional to the performance of the nth section of the production system, on the third - the high-frequency synchronizing sequence of pulses, on the group of outputs 4 to (n + 2) - the sequence of pulses, the frequency of which is proportional performance pervk (p-1) sections of the production system.

In counter 14 of registration unit 5, the number of finished products is recorded at the output of the production system, in counter 15 — the total system idle time, in counter 16 — the total uptime of the system.

The device for modeling production systems allows simulating random processes of promotion of manufactured products in different areas (phases) of the technological system, taking into account the reliability of areas and interphase stores.

If there is a failure of equipment sites and it will not be restored until the exhaustion of stocks of previously processed products in the interfacial accumulator, the process is interrupted. In the event of the restoration of the failed equipment until the exhaustion of the stock of products in the interfacial accumulator, deviations in the normal course of the technological process do not occur.

If the interfacial storage unit fails, the product from the previous section is directly transferred to the next section, and if the storage time of the storage unit exceeds the limiting one, then the semi-finished products stored in it lose their properties and are removed from the production system.

We assume that if there is a product flow at the output of the production system, it is considered to work reliably, and if there is no flow, it is idle.

The device allows to evaluate the numerical values of the quality indicators of the functioning of production systems at the design and reconstruction stage, taking into account the use of equipment and storage devices with different reliability.

A device for simulating a production system with unreliable accumulators operates as follows.

Before the device starts operating, all the triggers and counters of the device are set to the zero state. After turning on the device, blocks 1 and 2 of the generators form a sequence of random pulses at each output, and a sequence of pulses of a given frequency appear at the outputs of block 3 of the clock generators.

15 To the summing input of the counter 6, high-frequency pulses come from the third output of the block 3 of the clock pulse oscillators. When the next pulse arrives, the contents of the score of 20 Chik-6 increases by one and

the signals on the first and second outputs of the decoder 7 change, since the summing input of the counter 6 is connected with the building input of the decoder 7. When

The first input of the simulator k-ro section of the production system is connected to the second output of the simulator of the previous section. A single signal is present on it if the semi-finished products are in the interfacial accumulator located between these sections. When this accumulator is emptied, it is a single signal — the signal is replaced by 25 odd contents of counter 6 and zero. To the second input of the k-ro simulating a gating pulse on transAAA806

ke. Interfacial accumulators are modeled using reversible counters 28. Signals from the first and second outputs of the decoder 7, respectively, are sent to the fifth and test inputs of the k-ro imigator in the area of the production system. These signals synchronize the pulses arriving at the sum of 10 ruble and subtracting the inputs of the reversing counter 28, since typical reversing counters do not allow simultaneous supply of pulses to these inputs.

15 To the summing input of the counter 6, high-frequency pulses come from the third output of the block 3 of the clock pulse oscillators. When the next pulse arrives, the contents of the score of 20 Chik-6 increases by one and

the signals on the first and second outputs of the decoder 7 change, since the summing input of the counter 6 is connected with the building input of the decoder 7. When

25 the odd contents of counter 6 and the presence of a gating pulse on the transducer

The torus receives a stream of random pulses from the corresponding output of the generator 1, which sets the state (operational or restoration) of the equipment in the k-ro section. The third input of the simulator receives a stream of random pulses from the corresponding output of the generator 2, which sets the state (operational or restoration) of the interphase accumulator. The fourth input of the simulator receives pulses from block 3, the frequency of which sets the performance of the section

production system. These pulses are up to novibrators 25 and 26 respectively

The signals are passed to the D-input and the dynamic synchronous input of the trigger 19 and to the first output of the simulator, if the k-th segment is in a working state at different points in time.

At the summing (subtracting) input of the counter 28 pulse comes from trigger 19 (20), provided that

Institute, in the drive in front of him there are g second inputs of the elements And 32 and 33

Delhi is semi-finished products, and there is a place behind it in the interfacial accumulator to accommodate the products processed at the k-th section of the production system, which corresponds to a single signal, at the first output of block 30 of elements 2I-W1I. The seventh input of the k-ro simulator receives pulses from the first output of the (k + 1) -th simulator, which correspond to the withdrawal of semi-finished products from the interfacial accumulator located between the k-th and (k + +1) -m sections of the technological system, for processing on (k + Tj-M of a single-unit signal (the accumulator state is operable) at the time when the clock pulse travels to the second input of the And 23 (24) .0 day element

50 temporarily resetting trigger 19 (20) to the zero state. The code recorded in the counter 28 corresponds to the number of semi-finished products found in the interfacial accumulation

55 tele.

The decoder 29 generates at the first output unit signal if there is a place in the meteoric phase memory for the preparation of semi-finished products. Since on

the first output of the decoder 7 appears a single signal at the input of the element And 23, and at the second end of the course - a zero signal applied to the input of the element And 24 of each simulator section of the production system. With the even content of counter 6, the first output of the decoder 7 has a zero signal, and the second has a single signal.

Thus, the sum of the skinny and subtractive inputs of the counter 28 receives short pulses from the outputs of the odv different points in time.

At the summing (subtracting) input of the counter 28 pulse comes from trigger 19 (20), provided that

the second inputs of the elements 32 and 33

a single signal (operating state of the accumulator) at the moment of the arrival of the synchronizing pulse to the second input of the element 23 (24) .0 at the same time the trigger 19 (20) is reset to the zero state. The code recorded in the counter 28 corresponds to the number of semi-finished products found in the interphase accumulator.

The decoder 29 generates at the first output edt {a significant signal, if there is a place in the interfacial accumulator for receiving semi-finished products. Since on per15

20

BOM at the input of the first element And the block 30 of the elements 2I-CMM in the case of a working state of the interphase accumulator, there is a single signal,;, then the signal from the nepBoi o output of the decoder 29 passes to the first input of the element AND 17, As soon as the signal at the first output of the decoder 29 and at the first input of the element And 17 is replaced by zero zero (filling of the interphase accumulator), then the output of the element 17 is set to zero zero, which simulates a simple part of the production system, the flow of semi-finished products entering the drive interrupts ™ s.

A single signal at the second output of the decoder 29 simulates the presence of a stock of semi-finished products in the drive. When the interfacial accumulator is in a working state, this signal passes on the output of block 31, allowing the semi-finished products to be processed by the production system section located in the processing chain immediately after the interphase accumulator.

The failure of the interphase accumulator in the k-M section of the production system is simulated by the arrival at the third input of the k-ro simulator of a zero signal. At the output of the element 18, a single signal appears, which triggers the one-shot 27, which is a delay element with a time t. The second inputs of the elements AND 32 and 33 and the first inputs of the first elements AND blocks 30, J31 of elements 2И-OR receive a zero signal. The counter 28 and de-DiFljpaTop 29 imitating the inter-fianch drive are turned off. The contents of the counter 28 cease to change. A single signal from the He 18 element code permits the propause to exceed, then the C 21 input of the trigger 21 impulses from the output of the single vibrator 27 arrives at the moment when a single signal is present at the D input of the trigger, the Trigger 21 overturns into one state A single signal from its direct output zeroes the counter 29. This simulates the expiration of the storage time of the semi-finished products in the drive and their removal from further processing. The reset of the trigger 21 to the zero state is carried out immediately after the restoration of the working state of the accumulator. A single signal from the third input of the simulator arrives at the R input of trigger 21 and resets it to zero.

The normal course of the technological process at the kth section is ensured if the equipment of the kth section is in a working condition, there is a stock of semi-finished products in the interfacial storage unit preceding this section, and there is a place in the subsequent accumulator for placing the products processed in the kth section. . If one of these requirements is not met, then the process of functioning 30 of the system in the kth phase is interrupted.

Element I 9 imitates the final section of the production system. At its output, the flow of pulses is proportional to the flow of finished products.

,) j- LIU at the output of the system. It is assumed that the finished goods warehouse cannot overflow. The number of manufactured products is recorded by the counter 14 of the registration unit 5. At the output of the element And 9 there is a single signal, if in the last interphase accumulator there is a stock of products and the equipment of the last section is in a healthy

40

signal coupling, from direct and inverse. In this case, through the element of its output of the trigger 22 to the output of blocks 30 and 31, Using the trigger 22, the semi-finished products are simulated from the k-ro section to (k + l) -ft bypassing the interfacial accumulator in case of its failure.

If the recovery time of the interfacial accumulator does not exceed the storage time limit for the semi-finished products.

Claims (1)

50I I2 pulses, setting the time scale, pass from the first output of block 3 of clock generators to the input of counter 16, which fixes the total uptime of the production system. With a zero signal at the output of the element 10. The pulses from the first output of block 3 are fed to the input of counter 15, fxiru gg syu su -1marche idle time of the production system. Invention Formula that is, the pause length at the third input of the simulator is less than 0, then the semi-finished products do not lose their properties and are used in the technological process. If the duration five 0 , pause exceeded, then the C-input of the trigger 21 impulses from the output of the one-oscillator 27 arrives at the moment when a single signal is present at the D-input of the trigger, the Trigger 21 reverses to the single state, the single signal from its direct output zeroes the counter 29. This simulates the expiration of the storage of semi-finished products in the drive and their removal from further processing. The resetting of the flip-flop 21 to the zero state is performed immediately after the recovery of the drive state. A single signal from the third input of the simulator arrives at the R input of trigger 21 and resets it to zero. The normal course of the technological process at the kth section is ensured if the equipment of the kth section is in a working condition, there is a stock of semi-finished products in the interfacial storage unit preceding this section, and there is a place in the subsequent accumulator for placing the products processed in the kth section. . If one of these requirements is not met, then the process of functioning of the system in the kth phase is interrupted. Element And 9 imitates the final section of the production system. At its output, the flow of pulses is proportional to the flow of finished products. j- LII at the output of the system. It is assumed that the finished goods warehouse cannot overflow. The number of manufactured products is recorded by the counter 14 of the registration unit 5. At the output of the element And 9 there is t a single signal, if there is a stock of products in the last interphase accumulator and the equipment of the last segment is in a working mode 45 then nii. In this case, through the element The 50I I2 pulses, setting the time scale, pass from the first output of the 3-generator of clock pulses to the input of the counter 16, which fixes the total uptime of the production system. With a zero signal at the output of the element 10. The pulses from the first output of the block 3 are fed to the input of the counter 15, fxiruyu-gguyu su -1smarch idle time of the production system. Invention Formula A device for simulating production systems, containing the first random-pulse generator unit, a clock pulse generator unit, a registration unit, the first information input of which is connected to the first output of the clock generator unit, and a production system model containing two elements I and n-1 of production site simulators systems, each of which contains the first, second and third elements And, the first, second and third one-shot, the element NOT, the first and second triggers, reversible a counter and a decoder, in each of 15 each simulator of a section of the production of a section of a production system, the inputs of the decoder are connected respectively to the discharge outputs of the reversible counter, the outputs of the first and second one-shot are connected to the installation inputs of the first and second triggers, respectively, the direct outputs of the first and second triggers are connected to the first inputs of the first and second elements AND the corresponding 25 are connected to the outputs of the first and The second one-vibrators respectively, the first inputs of the first elements AND of the first and second blocks 2I-OR, the second inputs of the fourth and fifth elements AND, the installation input of the third trigger and the input of the element are NOT combined and connected to the corresponding output of the second block of random pulse generators, the first and second Mostly, the outputs of which are connected to the start inputs of the first and second single vibrators, respectively, the output of the third element AND are connected to the counting and synchronization inputs of the first trigger, the output of the element is NOT connected to the start input of the third single vibrator, the output of the third element And the k-ro simulator of the section production system (, p-1) the sub-codes of the descrambler in each imitation key to the counting and synchronizing section of the production system connected to the second inputs of the first elements AND, respectively, of the first and second blocks of elements 2И-OR, 40 direct and inverse outputs of the fourth trigger are connected to the first inputs of the second elements AND, respectively, of the first and second blocks of elements 2И-OR, the second inputs of the second element 45 the second trigger inputs (kl) -ro of the simulator of the production site of the given system, the first inputs of the third elements And all, the simulators of the production system section are connected respectively to the outputs of the first block of random pulse generators, the last output of which is connected to the first inputs of the first and second elements the system, the outputs of the first and second elements And which are connected to the second and third information inputs of the registration unit, the second inputs of the third elements And all simulators of the area t The technological process is connected respectively to the outputs of the group of block clock generators 50 which are connected to the output of the element NOT and the counting input of the third trigger, the output of which is connected to the zeroing input of the reversible counter, and the synchronizing input of the third trigger connected to the output of the third one-vibrator, the output of the first block of elements 2I-OR connected to the fourth input of the third element And simulator site production pulses, the second output of which is under the system, the outputs of the first and second terminals are connected to the second input of the first element of the new vibrators with the unit and the models of the production system and the zero inputs of the fourth trigger, the output of which is connected to the counter and clock inputs (n-1) -th simulator of the production system section, the third input of the third element and the first simulator of the production system section is connected to the bus of a single potential, which is different from the fact that, in order to make the modeling accuracy by taking into account the numerical values of indicators interphase storage devices, it additionally contains a second block of random pulse generators, a summing counter, a decoder, and The fourth and fifth elements AND, the third and fourth triggers and the first and second blocks of elements 2И-ИЛЙ are introduced in the military system, and in each simulator of the production system section, the summing and subtracting inputs of the reversible counter are connected respectively to the outputs of the fourth and fifth elements AND, the first inputs of the second one-vibration, respectively, the first inputs of the first elements AND of the first and second blocks 2I-OR, the second inputs of the fourth and fifth elements AND, the installation input of the third trigger and the input of the element are NOT combined connected to the output of the second block of random pulse generators, the first and second vycoda descrambler in each simulator section of the production system connected to the second inputs of the first elements AND, respectively, of the first and second blocks of elements 2И-OR, 0, the direct and inverse outputs of the fourth trigger are connected to the first inputs of the second elements AND respectively of the first and second blocks of elements 2И-OR, the second inputs of the second element- 5 0 which are connected to the output of the element NOT and the counting input of the third trigger, the output of which is connected to the reverse input of the reversible counter, and the synchronization input of the third trigger connected to the output of the third one-vibrator, the output of the first block of elements 2I-OR connecting to the fourth input of the third element AND production site simulator pa, respectively, the output of the second block of elements 2I-OR i-ro simulator (, n-2) section of the production system is connected to the fourth input of the third element AND (i + l) -ro simulator section of the production system, the output of the second block of elements 2I-OR (nl) -ro simulator section of the production system is connected to the third input of the first element And the second input of the second element And the model of the production system, the combined second inputs of the first elements And and the combined second inputs of the second elements And all simulators of the production system sections are connected to the first and second outputs of the device decoder, respectively, the information inputs of which are connected to the discharge outputs of the summing counter, strobe the input with the counting input of the totalizer counter and the third output of the clock pulse generator unit. Fiz. / csi