SU1499365A1 - Arrangement for simulating mass service systems - Google Patents

Abstract

The purpose of the invention is to expand the functionality of the device by simulating the additional servicing of the bill in redundant systems. The device contains a pulse generator with a random spacing interval, two failure generators, two elements AND, two prohibition elements, two triggers, the first OR element, two delay elements, additionally contains a counting pulse generator, a function setting trigger, a reversible counter, a second OR element, from the third to the sixth elements I. 1 ill.

Description

to the second input of the fifth element AND, the output of which is connected to the third-um by the inverse input of the first element AND, the trigger inputs of the operation mode setting are respectively the installation inputs of the device operation modes, and the output of the first OR element is connected to the third input of the third AND element the inverse of the fourth element And with the second input of the sixth element I.

The invention relates to specialized computer aids and is intended to simulate the processes for servicing applications in queuing systems.

The purpose of the invention is to expand the functionality by simulating the additional servicing of bids in redundant systems.

The drawing shows a functional diagram of the device.

The device contains the first 1, second 2 and fifth 3 elements AND, the generator 4 pulses with a random interval, the generator 5 counting pulses, the first 6 and second 7 failure generators, the sixth 8, the third 9 and the fourth 10 And, the first 11 and second 12 delay elements, trigger 13 for setting operation modes, first 14 and second 15 triggers, reversing counter 16, first 17 and second 18 elements OR, second 19 and first 20 inhibiting elements, information input 21 of the device, inputs 22 and 23 for setting modes functioning, output 24 numbers fully serviced x requisition and taken the analysis 25, the duration of service of the wok,

We believe the positive logic of the functioning of the device. The applications go to the input 21 of the device and are short pulses distributed according to the simulated random distribution law of the order. The generators 6 and 7 of the failures produce pulses whose frequency corresponds to the frequency of the occurrence of failures, and the duration - the duration of the failure effect in the corresponding channel. A 4-pulse generator with a random injection interval produces a short pulse, corresponding to a fully serviced application, after a triggering pulse arrives at its input

a time corresponding to the servicing time of the application if its locking input in this interval did not receive a pulse. The pulse generator 5 generates a periodic pulse sequence with a period that, in order to increase the simulation accuracy, it should not exceed O, 1 T, where T is the average failure time, the delay in elements 11 and 12 should slightly exceed the duration of transients in trigger 15 and elements 19 and 20. The zero state of the trigger 15 corresponds to the operation of the first channel, and the single state to the second one. In turn, the single state trigger

Section 13 corresponds to the operation mode of the device with full or partial servicing of the quota, zero with additional servicing.

The device works as follows.

In the initial state, the triggers 14 and 15 and the reversible counter 16 are in the zero state, and the trigger 13 for setting the operation modes is in the single state. This means that the pulses produced by generator 5 do not affect the operation of the servicing device. The impulse of the input is fed to the input 21 and passes through the element I 1, since zero potentials are present at its inverse inputs. Further, this pulse triggers generator 4 and transfers trigger 14 to one state, which is equivalent to the start of service for the application. From the flush-out trigger 14, a high yield arriving at the inverse input of the AND element 1 permits the passage of the following pulses until the service of the first application is completed. Tie, while at the output of the generator 4 and, respectively, at the start of 24, the devices do not have rits and miles, they

The timing of the termination of the ssuschet- and 1, which passes to the input of the trigger 14 and sets it to the zero state. Thus, at the output 25 of the device, pulses are formed, the duration of which corresponds to the service time of the application. In this mode, the pulses produced by the generator 7 of failures have no effect.

If a pulse is generated by a generator of 6 failures, the positive 1 1st potential passes through the open prohibition element 19, the OR element 17 and then through the AND 8 element to the locking generator 4 input than prevents the appearance of pulses at its output, if it was started, as well as the second input of the trigger 14 and, if it was in the single state, moves it to the zero state, t, e. imitation of termination of service state formation occurs. Passing through the delay element 12, the failure pulse sends the trigger 15 to the one state. The corresponding potentials at its outputs close the element 19 of the ban and open the element 20 of the ban. The device is now in service mode by the second channel. The service simulation therein is similar — when a failure occurs, the first channel is turned on.

If the pulses of both generators 6 and 7 fail, then a positive potential is formed at the output of the element And 2, which will act. the second inverse input of the element I 1 does not allow the impulses of the request to pass through the cut. In this case, under the influence of pulses of failures, elements 11 and 12 of the delay and single inputs of the trigger 15 are sent to both inputs. In this case, regardless of the state of the trigger 15, from one of the failure generators, the positive potential through the elements OR 17 and AND 8 affects the generator 4 random pulses until the end of the effect of the failure pulse of any of the generators 6 or 7. At the same time, the failure pulse ends earlier at generator 6, then the first channel will be restored to imitation, since the trigger 15, under the influence of the potential from the failure generator 7, will be in the zero state, will close

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5 20 5

five

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with the element .0 prohibition and at the output of the element OR 17 there will be a low dial and vice versa. Thus, in the described operation mode, the output of the device 24 produces pulses corresponding to fully serviced applications, and on-output 25- (Fully or partially serviced applications.

When the signal is applied to the input 23, the trigger 13 is set to the zero state, and under the influence of a high potential from its inverse output, the element I 3 opens, and a low impact potential from the direct output of the trigger 13 is closed. In this case, the pulses at the inhibitory input of the generator 4 are not received. This establishes the mode of operation of the model with additional servicing of the stock. In this mode of operation, the operation of the service channels is the same as in the previous case. The difference is that when a failure of one of the service channels occurs, an automatic switch to the healthy channel occurs without resetting the generator 4, and if a failure occurs on both channels at the output of 3J of OR 17, a high potential is formed. If the application servicing took place at the rem, then high potentials from the direct output of the trigger 14 and from the output of the element OR 17 open the element AND 9, through which the pulses from the output of the generator 5 begin to flow to the summing input of the reversing counter 16 occurs until the element "AND 9" is opened. Under the influence of the potentials from the discharge outputs of the reversible counter 16, a high potential is formed at the output of the element OR 18, which, entering through the element 3 and 3 to the third inverse of the element 1, additionally locks it interferes with the flow of service charges. Thus, the reversible counter 16 acts as an operative memorizing element, fixing for what time interval the blocking element AND 1 should continue after the restoration of any of the channels with their single failure, so that the next application is not received for service.

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When any of the channels in the code of the element OR 17 is restored, a low potential is generated, which is fed to the inverse input of the element AND 10, the protrusion as an unblocking signal and to the third input of the element 9, locking it. After completing the service of the application on the ampoule of trigger 14, a high potential is generated, which also, if there is a high potential from the output of the OR 18 element, opens the AND 10 element, which causes the arrival of pulses from the generator 5 output to the readings. The arrival of these pulses occurs until the reversible counter 16 clears, after which a low potential is formed at the output of the SHSh 18 element, which closes the AND 10 element and, through the AND 3 element, enters the third inverted input element .and 1, open-Vy rGo. The device is thus ready

eight

In service to the next application.

In the second mode of operation, the outputs 24 and 25 of the device receive pulses corresponding to fully serviced applications, and on the output 25, as in the first mode of operation, the duration of the pulses corresponds to the service duration of the order.

Thus, the technical advantage of the invention lies in expanding the functionality due to the fact that it allows to investigate a single-channel queuing system with redundancy of the main channel with an identical backup one in two modes of operation - with full or partial queuing service and with additional queuing service the restored channel, if the application service was interrupted by a channel failure.

Compiled by V. Fukalov Editor V. Petrash Tehred L. Serdyukova Proofreader E, Lonchakova

Order 4696/49

Circulation 668

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

 - - - - ---- - ------ - - at. -. i- ™ -in. - - -. "

Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101

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Claims (1)

DEVICE FOR MODELING MASS SERVICE SYSTEMS, containing a pulse generator with a random interval, two fault generators, two AND elements, two inhibit elements, two trig-> gers, the first OR element, two delay elements, and the direct output of the first trigger is the output of the service duration ustg »applications and connected to the first inverse input of the first element AND, the output of the first fault generator is connected—. is connected to the second inverse input of the first element And, the output of which is connected to the S-input of the first trigger and to the input of the pulse generator with a random interval, the output of which is the output of the number of fully served requests of the device and connected to the first R-input of the first trigger, the output of the second the fault generator is connected to the second input of the second element And, to the information input of the first inhibit element and through the first delay element is connected to the R-input of the second trigger, the direct and inverse outputs of which are connected respectively to the control inputs of the second and first inhibit elements, the outputs of which · ^{1 are} connected respectively to the inputs of the first OR element, the output of the first fault generator is connected to the information input of the second inhibit element and through the second delay element with the S-input of the second trigger, direct input the first element And is the information input of the device, characterized in that, with the aim of expanding the functionality of the device by simulating the after-service of applications in redundant systems, it further comprising a counting pulse generator, the operation mode setting trigger down counter, a second OR gate, the third through sixth AND gates, the counting of the pulse generator output is connected to first inputs tret-; it and the fourth AND element, the second inputs of which are connected respectively with the direct and inverse outputs of the first trigger, and the outputs are respectively with the summing and subtracting inputs of a reversible counter, the bit outputs of which are connected respectively to the inputs of the second OR element, the output of which is connected to the third input of the fourth and with the first input of the fifth AND element, the direct output of the trigger for setting the operating modes is connected to the first input of the sixth AND element, the output of which is connected to the inhibitory input pulse generator with a random repetition interval and with a second R-input of the first trigger, the inverse output of the trigger for setting the operating modes is connected to the second input of the fifth element And, the output of which is connected to the third inverse input of the first And, the inputs of the trigger for setting the operating modes are respectively the settings operation of the device, and the output of the first element OR is connected to the third input of the third element And, $ with the first inverse input of the fourth element And and with the second input grained element I.