SU1220008A1 - Device for determining distribution laws of random processes - Google Patents

Abstract

The invention relates to computing and can be used to determine the likelihood characteristics of random processes. The aim of the invention is to increase speed. The goal is achieved by introducing m channels containing m switches, (t-1) amplifiers, m integrators, m blocks of determining the rms value, as well as a control unit, 3 sludge,

Description

The invention relates to computing and can be used / for automatic measurement of the probability characteristics of random multi-channel processions;); source in

The purpose of the invention is to increase speed.

The figure shows a structural electrical circuit; FIG. 2 is a structural electrical circuit of the measuring channel; FIG. 3 is a structural electrical circuit of the control unit.

The device contains m measuring channels 1 .; multiplexer 2 counter 3 CR, arithmetic unit 4J block 5 memory type 7 control unit S generator 8 pulses counter 9 sample pulses generator 10 clock pulses., buses 11-13 switch i4s fleas 15 matching adjustable amplifiers iG, unit 17 for determining the root-mean-square value, scaled block 18; amplitude discriminator 19} integrator 19s integrator 20, distributor 21 pulses f counter 22 addresses distributor 23 pulses fs regulator 24 time intervals ;, counter 25 cycles generator 26 commands bus 27.

The device works as follows.

Measurement of the distribution function

division

at the DRC point of each process being studied x; - (t) j (where i 1,, kz | k is the number of inputs of each measuring channel i; j 1 j,. „. ,, m; m; the number of measuring channels 1) is based on Discrete Sampling Method The implementation value of x- (t) Npa is compared with the level of analysis.

C i

es-pi x; - (t) C; j, p e el and X; I {t) C

representing a binary signal

The obtained values of b; are summed at discrete points in time and then the average value of the accumulated sum is calculated

t: e:, function is calculated

h-. J

(Jr.

where F ,,,. ,, N; N is the sample size, s, which is an estimate of the probability of exceeding the studied response: 1–1–1 and threshold C. —, Value of the distribution function

 J

 R

j

(3)

ten

Calculation of the estimate of the cumulative sum-M1 R ;; The APC of all in-appliance implements a & t parallel-sequential method; m, e, in parallel, the functions h ;; and PJ yl m input realizations and the measurement process is repeated in times, "The total number of automatically analyzed processes is equal to the product of m by K.

In order to obtain comparable values of the P estimates: with a certain fixed threshold C, it is necessary to know the propagation variance j (power) for each random signal under study and from the known dispersion calculate the normalized values of P; .

In order to eliminate additional calculations and to simplify the processing algorithm 5 in the device to obtain the normalized values of P, the mean square value of the random process is measured in each test channel.

 J

and from these values are calculated

 j

(four)

where L is the proportionality coefficient D

3 of the proposed device, the d-set of IC1: random processes iX; (f-) i is fed simultaneously to the corresponding inputs m of measuring channels I

Consider the operation of the device from a certain moment of time determined by the impulse. Start of measurements. The start pulse is fed to the first input of the distributor 215 which expresses the leading edge of the gate measuring 1 T ,, thus allowing the passage of clock pulses from the output of the 10 clock clocks HNmynbCOB and the second input of the distributor 21,

in. (here with the second input of the block 7, the control input to the counter 22 of the command address to the first input of the distributor 23 ,. From the output distributor 23, c ;; the third output of the block 7

control and tuls1,1 polling arrive at the second input of the address counter 3 and to the generator input 8 pulses of samples, and from the output of the last

t, t

the pulses of the samples are fed to the input of the counter 9. The period i, of the pulses of the samples, is selected from the different correlation times of random processes equal to the maximum of them. The pulses from the output of the counter 9 are fed to the input of the generator 24, which is also the first input of the control unit 7, where the intervals Tj, T, T, and the counting pulses coming to the counter input 25 cycles are outputted. The duration of the interval. T, is selected based on the required accuracy of the variance estimate (j; j of the random process X; -; T N. s ;; Tj is determined by the recording time. To simplify the explanation of the principle of operation of the device

Te

The pulses of the intervals T ,, T, Tj from the output of the generator 24 intervals on the bus 27 commands nocTyn JOT to the first input of the generator 26 commands, which depending on them produces the corresponding commands on the bus 11 commands, and to the second input of the distributor 23, allowing for its corresponding the outputs, the output of the polling pulses during the interval Tt or the pulses of the output during the interval T. The counter 25 cycles upon completion of the K measurement cycles produces a pulse Stop coming from its output to the third input of the distributor 21, which by this pulse generates adny front strobe measuring T and thereby to inhibit passage imgGulsov clock in the control unit 7 terminates the measurement process

Thus, the automatic measurement of the m distribution functions (3) of the processes fx,; l is performed over three intervals T,, T, T, forming a measurement cycle Tc ;. All m + k distribution functions (3) are measured in k repeating cycles ц; During the measurement gate of T.

Consider the operation of the device within each of the intervals T ,, T, T.

During the interval Tj, the counter 22 command addresses on the bus 12 addresses initiates 26 commands in the generator, connecting e via buses 12 addresses and 11 commands To the inputs x; -, j 1,.,. m (consider, for example, the first cycle Тц ,, this process is repeated in the same way as K times) m iz20008

1 channel 1 random processes f X ... x.V In channels 1 for L 11 im J

time T, preparation for calculating the function (1) is carried out. During the interval T ,, the control unit 7 on the command bus 11 enables the operation of block 4, which can calculate either function (2) or function (3). The work of multi-channel unit 4

10 we will consider on the example of calculation of functions (2). At the beginning of the interval T, for the time s, in block 4, the initial value of the function Pjj, 0 is written to the block 5 of the memory. To the input of the block 4 s

15 of the output of multiplexer 2, under the influence of the address code from the output of the address counter 3 with the polling cycle, / t, the values of the function (1) generated in the m measuring channels 1 and

2Q its second input on bidirectional data bus 6 - function values

what B je

25 calculated in the previous polling cycle of multiplexer 2 and selected from memory block 5 by the same code of the address of counter 3. In block 5 with a cycle of at least t, / m according to the accumulating sum algorithm

thirty

  P, jtV h-e

the current estimate of the function (2) for the j-ro measurement channel is generated,

which is stored in the same cell of block 5. During the interval T. multiplexer 2 interrogates the measurement channels in series, with the sample pulses in adjacent channels 1 being shifted by c / m relative to each other. For the interval T, the multichannel block 4 generates estimates of the functions (2) of the processes that are stored in the corresponding cells of block 5. The capacity of the latter for storing the results for all random processes must be at least mtk-S bits, where S, N is the size of the estimate of the function (2).

The output pulses are output at the first output of the distributor 23, which is also the first output of the control unit 7.

The interval T can be excluded from the diagram, since at the end of the measurement process in the memory block 5 the values of the function estimates are found (2)

S

each of the m-k random processes. The introduction of T- is expedient for prompt recording of results at the end of a measurement cycle,

In measuring channel 1, for example, the first one of the studied implementations x; 1 goes through electronic switch 14 and block 15 to the input of adjustable amplifier 16. Number i of the analyzed implementation and the time of switching on switch 14 are determined by address and command received on buses 12, respectively addresses and I1 commands from the control unit. Switch 14 can be made on the basis of standard electronic switches 5, manufactured by F1x J, as a rule, with control circuits,

From the output of the adjustable amplifier 16, the process Xj is fed to the input of the block 17 and to the second input of the amplitude discriminator 19 From the value measured in block 17), j in block 18, the threshold C is calculated; , The value of the threshold С ;, ,, as can be seen from the expression (4) g is normalized by a measure, the day of each process studied

meaning

d;

Further calculated

the value C ;, arrives at the other input of the amplitude discriminator 19j in which the values of the function h J determined by the expression (1) are calculated

The values of the functions P ;; They will also be rated for power, which will allow the device to calculate the normalized values of the functions P ;;

-

defined, respectively, as well as (2) and (3) without complicating further processing. This, in turn, makes it possible to directly compare the results obtained at the output of the proposed device, with the same values of the proportionality ratio,

Meter I7 measures the rms ijj. by erection in qua /:; rat

X

Claims (1)

1 (T current signal Mr. on the interval t DIJIM extract quadratic core1 I , averaged j and 1 (h.) and dt about In block 18, the threshold C ;; calculated by expression (4), Since in meter 17, c1; can be represented as direct constant-200086 ka, then the value of C ;; easy to calculate with a dc accelerator, with a gain of early L. S AJv the lit discriminator 19 in the proposed device is a voltage comparator, one input of which receives the studied implementations ;, the other - to the threshold Ci; and a binary signal hj is generated at the output; . The INPUT of the measuring channel 1 is the output of the amplitude p of the i9. 5 Ф о рм у л and iso R a t en i i. A device for determining the laws of probability distribution of random nponeccoBj containing amplifier. An adjustable amplifier amplitude discriminator scaling unit Arithmetic unit generator w-pulses sampling counter, the counting input of which is connected to The output of the pulse generator j the output of the scaling unit is connected to the information diagonal input of the amplitude displacement generator. the input of the threshold of which is connected to the input of an adjustable amplifier,; differ- ent with that in order to improve speed;: a memory block, a clock and a clock generator, an address counter, a multiplexer p m switches, 2 (m-l) amplifiers, m integrators 5 P1 definition blocks are entered into it. in the bottom of a quadratic value and the control unit, containing the address-; counter: command, command generator ,, counter iLHKJ,: o.B, shaper of time intervals,: distribution of g1k pulses,: the actual input of the first distribution, l pulses is connected to the OUTPUT of the generator- - right clock pulses, the first you) of the time slot generator,; O11 is connected to the input C tog via a cyt counter; the first distributor mmpulsoEr whose third input ow - g; . Input Start b.Poka control J The ohm nepBOj o of the Sh-Shul-SOE distributor is connected to the counting input of the counter of the counter and to the clock input of the second pulse distributor, whose information input is combined with the input of the task and the time intervals of the command generator, the input of which is connected to the output of the time interval 5 intervals of the counter output 7 the command addresses are connected to the address input of the command generator, the first control of the ix input of the switches (i 1, t) and to the senior bits of the address input of the memory block, whose information input is connected to the output of the arithmetic unit, the first information input of which is connected to the output the memory unit, the command input input of the arithmetic unit, the multiplexer of the switches and the write-read input of the memory unit are combined and connected to the output of the command generator; the bits of the address input of the memory unit are combined with the address input ohm multiplexer and connected to the output of the address counter, the clock input of which is combined with the input of the pulse generator and connected to the first output of the second pulse distributor, the second output of which is connected to the counting input of the address counter, the information output of the multiplexer is connected to the second information input of the arithmetic unit, output i- ro amplitudes of the discriminator connected to the i-information input multiplex 20008 Copa, the output of the i-ro switch is connected to the input of the i-ro input amplifier, the output of which is connected to the information input of the i-ro of the adjustable amplifier, the input of the gain control of which is connected to the output of the i-ro integrator, the first input of which is connected to the output of the The rms value, which is connected to the input of the scaling unit, the output of the i-amp of the amplifier is connected to the input of the RMS value block, the input of the i-ro. the switch is inserted into the i-M information input of the random process analysis device. 2, The device according to claim 1, wherein the command generator comprises first, second and third decoders, the first inputs of which are combined and are the address inputs of the command generator, the second 25 inputs of the decoders are the control inputs of the generator commands, the decoder outputs are command generator outputs. .I 2 h-  t  V7 - ,, nd G // G. 9  fiJ KZ and 9 needles J tsm Compiled by P. Mukhin Editor N, Dumb Tehred L „Oleinik Proofreader L. Pilnpenko Order 1323/54 Circulation 671 Subscription of the USSR State Committee for inventions and discoveries 113035, Moscow Zh-35 ,, Raushsk nab., d.4 / 5 Branch P1Sh Patent, Uzhgorod, ul "Project, 4