SU1381501A1 - Random pulse stream generator - Google Patents

Abstract

The invention relates to computing and can be used in solving problems of statistical modeling. The purpose of the invention is to expand the functionality of the device due to the formation of a stream of pulses, the intervals between which are subject to the law of the maximum term of several dependent random variables. The device contains primary generators 1 random pulses, memory elements 3, counter 4, comparison circuit 5, the first input of which is the device input. The device allows to model the moments of failures (restorations) of devices with structural redundancy, as well as the moments of the completion of similar work, each performed by a group of concurrently working performers. 2 Il. cl

Description

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The invention relates to computing and can be used in solving problems of statistical modeling.

The purpose of the invention is to expand the functionality of the device by forming time intervals, described by the law of distribution of the maximum term of several independent random variables.

Figure 1 shows the block diagram of a random-pulse generator; figure 2 - diagram of the generator.

The random pulse generator contains primary random pulse generators 1, the element OR 2, a group of memory elements 3, a counter 4, a comparison circuit 5.

When the device is turned on, i.e. when a single pulse is applied at time t to the recording (second) inputs of the memory element 3, this pulse 25 is recorded in the memory storage cells. At the same time, the starting impulse, entering the second input (input Reset) of the counter 4, makes it zero, and entering the Start-ups of the generators 1, starts them. In addition, this pulse passes to the output of the device, marking the beginning of its operation at the moment

0So counting from m20

thirty

arriving at the matching input of the first memory cell, does not cause the appearance of a pulse at its output, since the recorded pulse was read during the first access.

Similarly, the pulses are generated by the other generators and they are read by the pulses stored in the memory cells 3, which is illustrated by the diagrams shown in FIG. 3b. All pulses read from the memory cells through the OR 2 element also arrive at the first (counting) input of counter 4.

All the memories that are read out from the 3 memory cells at random intervals r, in the pulses arriving at the first (counting) input of the counter 4, are counted in it.

In the notation of FIG. 3, the two-digit subscript subscript has pulses generated by generators 1, for example, where l is a random variable symbol, the first subscript subscript of the value denotes the sequence number generated by a separate generator 1 pulse, and the second subscript denotes the sequence number of the generator itself 1.

35

ment t, at random intervals

The number n calculated in the counter 4, which arrived at its first (counting) input pulses, goes to the second input of the comparison circuit 5, where cfp ,, nivaet with the number n ,,. entered on time, the generators 1 start vraba- "goal"

her first entry. As soon as on the first one there are random sequences of pulses. So, the first impulse, developed by the first generator 1, through a random interval 1 (see Fig. 3b), goes to the second (matching) input of the first memory cell (see Fig. 3b), in which, as in all other 45 memory locations, stored

input of counter 4 at time t, t

(Where

, max (

  about “1 shalch, j„,

 ,)) the last pulse arrives (in FIG. 3d, d, to this pulse generated by the second generator 1, taking into account which the number n of pulses counted by counter 4 becomes equal to moment t (, pulse. This pulse results from the inversion at time instant to + the first memory cell is reproduced at its output (see fig. Sv) and through the element OR 2 enters the first (counting) input of counter 4 (see fig Sig.). It should be noted that after the first access to the first memory cell it is possible and the second call to it in the form of a pulse arriving at its reproducing input from the output yes of the first generator 1. This pulse, shown by the dotted line in FIG. 36,

arriving at the matching input of the first memory cell, does not cause the appearance of a pulse at its output, since the recorded pulse was read during the first access.

Similarly, the pulses are generated by the other generators and they are read by the pulses stored in the memory cells 3, which is illustrated by the diagrams shown in FIG. 3b. All pulses read from the memory cells through the OR 2 element also arrive at the first (counting) input of counter 4.

All the memories that are read out from the 3 memory cells at random intervals r, in the pulses arriving at the first (counting) input of the counter 4, are counted in it.

In the notation of FIG. 3, the two-digit subscript subscript has pulses generated by generators 1, for example, where l is a random variable symbol, the first subscript subscript of the value denotes the sequence number generated by a separate generator 1 pulse, and the second subscript denotes the sequence number of the generator itself 1.

her first entry. As soon as the first input of counter 4 at time t, t

(Where

, max (

  about “1 shalch, j„,

 ,)) the last pulse arrives (in FIG. 3d, d), this is the pulse generated by the second generator 1, taking into account which the number n of pulses counted by counter 4 becomes equal to 0

five

on the output of the comparison circuit 5 (see Fig. 3l), a pulse is generated that arrives at the output of the device, at the recording inputs of all memory cells and at the Start inputs of all primary generators 1 (see Fig. F, a) . The same impulse, arriving at the second input (input Reset) of counter 4, produces its zeroing. As a result, counter 4 is again ready to count the pulses arriving at its first input from all the elements 3 of the memory during posting to their reading inputs of the pulses produced by the respective generators 1.

Thus, the last, fifth pulse, produced by all the generators 1, passes to the output of the device, forms an output stream of pulses, after a random time (see fig.Za, k, l) after starting all the generators 1 at time t . The remaining n-1 pulses are produced through

time 1 t С (1 (see fig. Zack) after starting all generators 1 at time tu. Therefore, the time value,, is the maximum in a sample of n independent random variables

17

Simultaneously, the output pulse, re-entering at the moment of time

t, t p + €, to the inputs of all generators 1, which are started and start to generate pulses at random intervals of time f,, ,, ,, ..., С а ,, ..., t, counting from the moment t ,. These pulses, in their turn, receive pulses recorded in memory cells, which through the element OR 2 arrive at the first input of counter A. As soon as

l a

INPUT of the counter q at time t ,; t, + T g; the last pulse arrives (on fig.Ze is an impulse read from the i-th memory cell by the impulse produced by the iM generator when it is secondly started at time t,), the number of pulses at the second input of the 5th junction becomes equal to its output at the moment, a pulse is generated, arriving at the output of the device and the inputs of all generators I for their subsequent launch (see fig, 3e, a). Consequently, during the second start of all generators 1, time j is maximum in a sample of n independent random variables 6j ,, ...

I (,... L

0

At the third simultaneous start of all generators 1 at time C, as shown in Fig. Sv, at the first input of comparison circuit 5, at the time ,, + fj, an impulse is received by the first memory cell. After that, since n p, the output of circuit 5 produces a pulse arriving at the output of the device and at the input of all generators 1 for their subsequent launch. Therefore, at the third run of all generators 1 time value.

l-j

r is the maximum in the sample

of n independent random variables

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During further operation of the device, the entire cycle of operation of the device described above for the formation of the output pulse flow is repeated.

Claims (1)

Invention Formula Random pulse flow generator, containing a group of primary sources of random pulses, an OR element, characterized in that, in order to expand the functionality of the generator by forming time intervals, described by the distribution of the maximum term from the group of independent random variables, it contains a counter, comparison circuit and a group of memory elements whose outputs are connected to the inputs of the OR element, the output of which is connected to the counter input of the counter, whose information output is connected n with the first input of the comparison circuit, the second input of which is the input of setting the time interval of the generator, and the output of the comparison circuit is connected to the Reset counter input, with the inputs Record of the logical unit of the 1st memory group and with the Start inputs of the primary sources of random pulses , the outputs are connected to the interconnecting inputs of the corresponding memory elements of the group i 0 five 0 py.