SU1049905A1 - Random event arrival generator - Google Patents

Abstract

1. GENERATOR OF FLOWS OF EVENTS, containing the first sensor of the Poisson flow of pulses, a frequency divider, the control input of which is the control input of the generator, a counter, the discharge outputs of which are connected to the corresponding discharge inputs of the gated decoder, the outputs of which through the switch are connected with the corresponding inputs of an OR block, characterized in that, in order to simplify the generator without reducing the accuracy of operation, a second sensor of the Poisson pulse flow has been introduced into it and a pulse flux intensity equalization unit, the first and second inputs of which are connected respectively to the outputs of the first and second Poisson pulse sensors, and the first and second outputs of the intensity equalization unit by S pulse currents are connected respectively to the counting input of the counter and c (P input frequency divider The output of which is connected to the Reset counter input, the control input of the gated decoder is the Poll generator input, and the outputs of the OR block are the generator outputs. . icik: joint venture

Description

2. The generator according to claim 1,, tl l and the fact that the block of intensity equalization of the streams of pulses contains the first and second elements OR, the first, second, third and fourth elements AND, the trigger and the high-frequency pulse generator, the output of which is connected to the counting the trigger input, the direct output of which is connected to the first inputs of the first and fourth elements And, and the inverse output of the trigger is connected to the first inputs of the second and third elements And, the second inputs of the first and second, ele 9905

These units are interconnected between each other and are the first input of the block, the second inputs of the third and fourth elements of AND are interconnected and are the second input; block, the outputs of the first and third elements AND are connected respectively to the first and second inputs of the first OR element, the output of which is the first output of the block, the outputs of the second and fourth elements AND are connected respectively to the first and second inputs of the second OR element, the output of which is the second output block,

The invention relates to computing and can be used to create computing devices with a probabilistic presentation of information, for instrumental modeling of local random events and building random number sensors with a given distribution. A generator is known in which the assignment of the desired law of distribution of probabilities is performed by combining and (re-enumerating and equal to Vertical outputs of the decoder m. However, such generators require a large amount of electronic equipment. A generator of random event streams is also known, in which the number of primary sources of a random process is reduced to one. It contains a random pulse flow sensor, a kip-relay, an AND element and a pulse counter sequentially connected, a gated decoder, a switch p and a block of elements OR z. However, the generator is characterized by a low accuracy of operation, since the primary probabilistic constants formed in the generator depend on the difficulty of adjusting the intensity of the random pulse flux sensor. The closest to the invention in technical essence and the achieved result is the generator of random flows event, containing a Poisson pulse flow sensor, the output of which is connected to the counting input of the counter and through the serially connected delay line and controlled th frequency divider - with the input Interrogator of the decoder and input Reset of the counter, the bit outputs of which are connected to the corresponding bit inputs of the decoder, the outputs of which through the switch are connected to the inputs of the block of elements OR Z. . A disadvantage of the known generator is the complexity of its device, due to the need to use a time delay line of pulses that performs the role of statistical separation in the formation of a second, identical in intensity Poisson flow of pulses. The required time delay is tens of average periods of the Poisson flow pulse -j (5) -, where K is a frequency divider parameter that takes integer values 0,1,2 ..., and at I 10 pulses / s reaches coteH ISS. Practical implementation of large time delay values of pulse signals in a wide frequency band is a complex technical task. The purpose of the invention is to simplify the generator device by reducing the electronic equipment without reduction. nor the accuracy of the work by eliminating the complicated implementation of the time delay line. To achieve this goal, a known generator containing the first Poisson pulse flow sensor, a frequency divider whose control input is the control input of the generator, an estimator whose bit outputs are connected to the corresponding bit inputs of the gated decoder, the outputs of which are connected through the switch with the corresponding inputs of the block of elements OR, the second sensor of the Poisson pulse flow and the block of intensity equalization of the streams of pulses are entered, the first and second inputs which are connected respectively to the outputs of the first and second sensors of the Poisson pulse flow, and the first and second outputs of the intensity equalization unit for the pulse currents are connected respectively to the counting input of the counter and to the input of a frequency divider, the output of which is connected to the Reset input of the counter, the control input of the gated decoder is The polling of the generator and the outputs of the OR block are the outputs of the generator. In addition, the pulse flux intensity leveling unit contains the first and second elements OR, the first second, third and fourth elements AND, the trigger and high-frequency pulse generator, the output of which is connected to the counting input of the trigger, the direct output of which is connected to the first inputs of the first and fourth the elements And, and the inverse output of the trigger is connected to the first inputs of the second and third elements And, the second inputs of the first and second elements And are interconnected and are the first input of the block, the second inputs of the third and of the right AND elements are interconnected and are the third input of the block, the outputs of the first and third elements AND are connected respectively to the first and second blocks | MI of the first OR element, the output of which is the first output of the block outputs of the second and fourth AND elements the first and second inputs of the second OR element, the output of which is the BTQ-output of the block. In the proposed generator, a discrete subsystem of a frequency divider is used to form the primary probabilistic constants — a counter with a finite number of states affected by two independent Poisson pulse flows with equal intensity I. Under these conditions, the numerical values of the probabilities Pf ) (K), p 6,1,2, ..., K 0,1,2, .., do not depend on the parameter, and the high-intensity change of states is characterized by the absence of aftereffect, which generally provides high accuracy and speed generator. In this case, the function of the time delay line, associated with the formation of two independent Poisson streams of pulses with equal intensities, is performed by an alignment device, which can be performed on the basis of typical elements of a discrete technique. FIG. 1 shows a structural diagram of the generator; in fig. 2 is a state graph of a subsystem frequency divider — a counter, in FIG. 3 - probability constants Pf, (k), K 6.6; n 0.12. The random event flow generator contains the first 1 and second 2 sensors of Poisson streams and mpuls, unit 3 for equalizing the intensities of impulse flows, adjustable divider 4 frequencies, counter 5, gated decoder 6, switch 7 and unit 8 of the OR elements. In addition, the alignment device 3 comprises a high-frequency generator 9, a trigger 10, a first 11, a second 12, a third 13, a fourth 1 AND elements, a first 15 and a second 16 OR elements. Sensors 1 and 2 of Poisson pulse flows can be performed according to a typical circuit containing a series-connected noise source, an amplifier, a threshold element, and a shaping cascade. Counter 5 and a frequency divider, which is a scaling circuit with a specified division factor (K + 1), can be performed according to the serial connection scheme of static triggers in the pulse counting mode. For the frequency divider, feedbacks are introduced that provide different division factors (K + 1) - 1. The gated decoder 6 can be made as a group of elements AND (by the number of outputs) and the state decoder of counter 5 with potential outputs connected respectively to control inputs of elements AND groups. In this case, the information inputs of the elements of AND group are combined and are the control input of the gated decoder. Generator operation in the future. Using the alignment unit 3, the Poisson fluxes of the pulses of sensors 1 and 2, which in general have different intensities, are converted into fluxes with equal intensity without violating their probabilistic properties and initial mutual independence. The intensity of the output streams of the leveling device is the arithmetic average I from the intensities -ft, I 2 input streams --- l, MUCH AND D) For this purpose, the frequency of the oscillator 9, determining the frequency of switching of the trigger 10, is one order higher than the intensity of one of the two streams f ,, 5 10 max (2) it 1, 2 When condition (2) is satisfied, the uniform distribution of the pulses of the flows A / (and D 2 at the output of the four elements I (11, 12 and 13, 1), in which non-dependent Poisson flows with an in -D are formed Intensities I-.g-D. -7g and 42- -2 at the outputs of the respective 15 4 auxiliary elements I. Taking into account the Cross-links, between the outputs of the elements And (12 and 13) and the inputs of the elements OR (15 and 16) at the outputs of the latter, streams with intensity mI (1) are formed. Each pulse from the output of the element OR 15 increases the state n (t) of the counter 5 by one. The pulses from the output of the element OR 16 increase the state of the frequency divider, and each (K + 1) -th pulse resets the contents of counter 3 to zero. In the gated decoder 6, the process n (t) is indicated by the hold time in the open state for only one nth Output. The polling pulses that arrive at arbitrary points in time are distributed along the outputs of the decoder with unconditional probability (Pfi (K)) constituting the complete event groups at different values of K, 1P "(K) 1, K 0.1 , 2, ..., (3) h - o is the output number of the decoder 6; (K + 1) is the division ratio of the divisor t. frequency counter 5, shown in Fig. 2. On the graph, transitions to the right occur under the influence of flow on the counting input of counter 5, and transitions downward - under the influence of the flux I. at the counting input of the divider. 00 RP, -QP, ROO., Neither; 4, K-P P ZR pi, o by Pn -,. N4o2V Pn.,. Р. 1. P-ORP-1.K-4 P.I- -2 Pcs-h The parameter O, entering the left and right sides of the equations of the system (k), is reduced. Unconditional probabilities P (K) from Sf (K) (Fig. 2) of counter 5 are determined by the sum of conditional probabilities of counter 5 states for different states of frequency divider C of frequency S

where - “possible states of divider

4 frequencies 0,1,2, ..., K-1. From the solution of the system () of linear algebraic equations under the condition Γ (3) and taking into account (5) we find the unconditional probabilities of the states S), j (K) of the counter 5 at an arbitrary time

The sets of probabilistic constants calculated by formula (6) taking into account m of the table of coefficients) are given. The graphs of FIG. 3. Thus, in the proposed generator, the formed RP probabilistic constants (K) do not depend on the parameters of sensors 1 and 2. Due to this, the proposed generator is not inferior in accuracy to the known generator. Since the excitation probabilities of each output of the decoder 6 are known a priori, by combining these outputs using the switch 7 and block 8 of the OR elements, incompatible random events distributed in space (over the outputs of the geerator) can be generated in accordance with the required law. The procedure for setting the proposed generator of atsa is logical to the procedure of setting the known generator. In this case, the ones shown in FIG. 3 sets of probabilistic constants Pfj (k). To form independent case events, period T of the survey

where bn (K) are coefficients, the values of which for n 1 and K1 1 are determined with the help of the recurrence relation bn (K) - bj (K-1) i bn (K) under two boundary conditions b (0) 1 with n

.5 0,1,2, .. and bo (K). at K 0,1,2, ...

The numerical values of the helix coefficients, as in the case of the known generator, must exceed the value of T o. Thus, replacing the time delay line with a logic device for equalizing the intensities of the two impulse streams reduces the volume of electronic equipment and simplifies the design of the generator; methodological error is almost absent. , the reliability of operation is improved; when one of the sensors fails, the generator remains operable with a certain decrease in NII operating speed (Formula J and 7). In addition, the circuit of the proposed generator contains a small number of external contacts and consists of the simplest. Structural and logical elements of discrete technology, which creates improved opportunities for performing significant parts of it in the form of a unified chip based on integrated technology. t 2 3 C 5 6 1 8 in Fig.Z Yu tr t

Claims (2)

1. A random event flow generator, comprising a first Poisson pulse flow sensor, a frequency divider, the control input of which is a control input of the generator, a counter whose bit outputs are connected to the corresponding bit inputs of a gated decoder, the outputs of which through the switch are connected to the corresponding inputs of the block of OR elements, characterized in that, in order to simplify the generator without reducing the accuracy of operation, a second Poisson pulse flow sensor and a block are introduced into it equalization of intensities of the flow of pulses, the first and the second inputs of which are connected respectively to the outputs of the first and second sensors of the Poisson pulse stream. and the first and second outputs of the unit for equalizing the intensities of the pulse flows are connected respectively to the counting input of the counter and to the * input of the frequency divider, the output of which is' \. connected to the input Reset counter, f control input gated de! the encoder is the input Poll generator, and the outputs of the block of elements OR are the outputs of the generator. 2. The generator according to claim 1, wherein the block for equalizing the intensities of the pulse flows contains the first and second OR elements, the first, second, third and fourth AND elements, a trigger and a high-frequency pulse generator, the output of which is connected to the counting the trigger input, the direct output of which is connected to the first inputs of the first and fourth elements And, and the inverse output of the trigger is connected to the first inputs of the second and third elements And, the second inputs of the first and second, elements And are interconnected and are the first input OK, the second inputs of the third and fourth elements AND are interconnected and are the second input / block, the outputs of the first and third elements AND are connected respectively to the first and second inputs of the first OR element, the output of which is the first output of the block, the outputs of the second and fourth elements AND connected respectively to the first and second inputs of the second OR element, the output of which is the second output of the block. h