SU1022161A1 - Random process generator - Google Patents

Abstract

GENERATOR OF THE CASE OF THE PRESHESSA, containing the first memory block, the output of which is connected to the first control input of a random number sensor, the output of which is connected to the control input of the pulse counter. And the inputs of the first and second memory register, the count input of the pulse counter is connected to the output the first generator is a pulse, the output of the second memory register is connected to the control input and a frequency divider, whose information input is connected to the output of the second pulse generator, the first output of the first memory register is connected A control polarizer modulator, whose informative input is connected to the output of a code-voltage converter, and the polarity modulator output is a generator output, which in order to improve accuracy, two functional converters are introduced , sum ator, third memory register, second and third memory blocks, generator of uniformly distributed {x random numbers, accumulation unit, trigonometric function block, first and second counters and third pulse generator, divider output The main input is connected to the first input of the first functional converter, the second input of which is connected to the output of the pulse counter, the second output of the first memory register is connected to the third input of the first functional converter, the first output of which is connected to the second control of the random number sensor input (L second output of the first The 47-channel converter is connected to the first input of the adder, the output of which is connected to the third-memory memory register input, the output of which is connected to the input of the transducer code-voltage gate, the second input of the adder is connected to the ND N3 in the accumulation unit, the first input of which is connected to the output of the second memory block, the input of which © is connected to the information input of the third block: the lamp, the first input of the second functional converter, and the output the first counter, the output of the third memory block is connected to the second input of the second functional converter, the output of which is connected to the input of the trigonometric functions forming unit, the output of the last is connected to the second input of the block the third input of which is connected to the control input of the third memory register, the input of the second counter and the output of the transfer signal of the first counter whose input is

Description

dinene with the output of the third pulse generator, the output of the second counter is connected to the third input of the second functional converter, the output of the generator is evenly distributed

the random numbers are connected to the address input of the third memory block, the control input of which is connected to the output of the transfer signal of the second counter.

The invention relates to computing and can be used to create stochastic computational modeling devices and automated test control systems, in particular for mechanical solutions.

A device is known that allows the formation of a continuous random process of the vibration type. The power spectral density control of a random process formed is accomplished by varying the frequency characteristics of the shaping filters 111

However, that practical point of view, the design and manufacture of shaping filters with a tunable frequency response is a difficult technical task. In addition, configurations of forming filters allow the restructuring of frequency properties in a wide range only

mechanically.

It is also known a device comprising a random number sensor, pulse generators, triggers, AND and OR elements, memory register, adder, memory block,

two counters, cyclic shift register and the corresponding connection 2 J.

A device is known that allows forming a random pulse process, of the type, which turns out to be a sequence of signals of a certain form, following at random intervals of time .:

It contains many pulse generators, elements AND and OR, and some other auxiliary elements, the waveform is rectangular, and the control of the spectral characteristics of the output random process is carried out by adjusting (changing) the law of distribution of random time intervals between pulses; 3. .

i The closest technical solution to the present invention is a device containing serially connected memory block and a random number sensor, the output of which is connected to the first input of the pulse counter and the input of the first and second registers, the second input of the pulse counter connected to the output of the first pulse generator, the output the second register is connected to the first input of the frequency divider, the second input of which is connected to the output of the second generator, the code-voltage converter, the output of which is connected to the first input th modulator polarity, the first output of the first register is connected to a second input of the modulator polarity, whose output is the output device 4.

The main disadvantage of the known devices is the impossibility of forming a pulsed random process with a controlled waveform, as well as a random process, which is a composition of a pulsed random process with control laws for the distribution of signal parameters and a continuous random process with the required (controlled) spectral density power.

The purpose of the invention is to increase the accuracy of forming a random process with

complex waveform and controlled probabilistic and spectral characteristics. characteristics and expansion of the class of reproducible random processes.

The goal is achieved by the fact that a random process generator containing the first memory block, whose output is connected to the first control, random number sensor input, the output of which is connected to the control of the pulse counter input and to the inputs of the first and second memory registers, the counting input of the pulse counter is connected to the output of the first pulse generator, the second memory register is connected to the control input of a frequency divider, whose information input is connected to the output of the second pulse generator, the first in the course of the first memory register is connected to the control input of the polarity modulator, whose information input is connected to the output of the code- apr converter, and the input of the polarity modulator is the generator output, two power output converter, an adder, the third memory register, the second and third memory blocks, the generator of uniformly distributed random numbers, the accumulation unit, the generation of triggi metric functions, the first and second counters and the third pulse generator, the output of the frequency divider is connected to the first input of the first functional converter, the second input of which is connected to the output of the pulse counter, the second output of the first memory register is connected to the third input of the first functional converter, the first output of which is connected to the second upstream input of the random number sensor, the second output of the first functional converter is connected to the first input of the adder, the output of which is connected to the information input of the third memory register, the output of which is connected to the input of the code-voltage converter, The second input of the adder is connected to the output of the accumulation unit, the first input of which is connected to the output of the second memory block, the input of which is connected to the information input of the third memory block, the first input of the second one to the 5T1Cational converter and the output of the first counter, the output of the third memory block is connected to the second input of the second functional Converter, the code of which is connected to the input of the block of formation of trigonometric functions, the output of which is connected to the second input of the accumulator, the third of which is connected to the control The third third register memory input, the second counter input and the transfer output of the first counter, whose input is connected to the output of the third pulse generator, connect the second counter output to the third input of the second fuac. converter, the generator output of uniformly distributed random condoms {1Non with the address input of the third memory block, the street of which is connected to the output of the transfer signal of the second counter. The essence of the invention is that the output process is formed as a composition of a low-frequency pulse process with a programmable waveform and arbitrary given laws of parameter distribution and a high-frequency continuous random process with desired and controlled spectral properties. FIG. 1 shows a block diagram of a random process generator; in fig. 2 - the first functional transformer; in fig. 3 — accumulation unit; in fig. 4 - the second functional converter; in fig. 5 shows an example of the implementation of the process; the device contains the first 1, second 2 and third 3 memory blocks, the sensor 4 random numbers, the first 5 and second 6 pulse generators, the first 7, the second 8 and the third 9 memory registers, the counter 1 of pulses, the first 11 and second 12 counters, frequency divider 13, code-voltage converter 14, polarity modulator 15, first functional converter 16, adder. 17, an accumulation unit 18, a trigonometric function generation unit 19, a second (| 1n1 converter; 20 generator, 21 uniformly distributed random numbers, a third pulse generator 22. The first memory block 1 is designed to store codes defining the type and numerical characteristics of the distribution functions the probabilities of the parameters of a pulse random process. The second memory block 2 is designed to store the coefficients Pp (i) of the amplitude spectrum of a continuous random process. The third memory block 3 provides storage An array of random codes of amplitude, duration, and interval between the pulses, subject to the distribution functions, which codes are stored in the first memory block 1. The first 5 and second 6 generators of pulses are designed to generate clock pulses. The first memory register 7 serves for storing the code determining the amplitude and polarity of the next pulse, the second memory register 8 serves for storing the code determining the duration; the bone of the next pulse. Truty register 9pam tee is designed to write codes mpaovnyh values of a random process generated by the device. Pulse counter 10 is used to store a random code defining the interval between the pulses of the process being formed and to convert it into a time interval. The first counter 11 generates address codes for retrieving information from the second block 2 and the third memory block 3. The second counter 12 serves to set the codes used by the argument generation unit 19. The frequency divider 13 is designed to convert a clock sequence. the pulses generated by the second generator 6 into a pulse sequence with a frequency inversely proportional to the code stored in the second register 8. The code-voltage converter 14 is designed to convert to voltage codes whose sequence determines the instantaneous values of the generated process. The polarity modulator 15 provides a positive or negative polarity signal. The first functional converter 16 (FIG. 2) is designed to convert random codes defining pulse parameters into a code sequence corresponding to instantaneous values of the pulse process. It contains a multiplication device 23, an address counter 24, a fourth memory block 25, a first decoder 26, a second decoder 27, and a trigger 28. The fourth memory block 25 is designed to store the required pulse signal ordinates. The first input of the functional converter 16 is the counting input of the address counter 24, the output of which is connected to the address input of the fourth memory block 25 and to the input of the first distfrater 26. The second input of the functional converter 16 is the input of the second decoder 27, the output of which is connected to the first The setup trigger input 28 is installed at the first input of the address counter 24 and is the first output of the function converter. The output of the first decoder 26 is connected to the second setup input of the trigger 28, the output of which w of the connections to the control input of the fourth conductive unit 25. A third input of the memory functional bodies transform 16 is the first input of the multiplication device 23, a second input coupled to an output of the fourth memory block 25. The output of the fourth multiplication unit 23 is the second output of the functional transducer 16. The adder 17 is intended to form. code sequence defining the output process. Accumulation unit 18 is designed to focus the sum of the pairwise products of rPpU). The accumulation unit 18 (Fig. 3) is the third multiplication device 29 and the accumulator of the accumulator 30 of the accumulating type. The first input of the third multiplier 29 is the first input of the accumulation unit 18. The second input of the accumulation unit 18 is the second input of the third multiplication device 29, the output of which is connected to the input of the accumulating type adder 30. The third input of block 18 is the accumulation of voli etc by the input of the installation to zero of the accumulator of the accumulator of the accumulating type. The trigonometric functions forming unit 19 is intended to .ol the formation of the cosine of the argument. The second functional transformation: body 20 (Fig. 4) is designed to calculate the argument of the trigonometric function by the formula e iK - «- 4 (i), where 1, K are codes received respectively from the outputs of the first 11 and second 12 counters, ((i ) is the random phase code from the output of the third memory block 3. It contains a multiplier 31 and an adder 32. The first input of the converter is the first input of the second multiplication device 31, the output of which is connected to the first input of the second adder 32, the second input of the converter is the second input summatf 32, and This input is the second input of the second multiplier device 31 The output of the adder 32 is the output of the converter. A uniformly distributed random number generator 21 is used to generate a sequence of uniformly distributed deduction codes. The third generator 22 is designed to synchronize the operation of the device. In Fig. 5c As a pulse process, a sequence of triangular equilateral signals is shown.

forms with random values of 5 and amplitude (A) i of duration Co) and interval (T).

The device works as follows, h

To form a current pulse, codes of parameter values (amplitude, duration, polarity of the pulse and the interval between pulses) are formed. The values of the process parameters are formed with in accordance with the assigned distribution laws, the codes of which are stored in the first memory block 1. From the output of the sensor 4 random numbers, the generated values of the parameters of the current pulse go to registers 7 and 8 and to the counter 1 of pulses. The value of the random code recorded in the second register 8 determines the conversion factor. divider 13 frequencies. This provides c for each value of the pulse width of formation: e at the output of the divider 13 clock frequency with a frequency inversely proportional to the code value of the pulse duration. The pulse sequence of pulses generated at the input of the frequency divider 13 is fed to the first input of the functional converter 16 to the second input of which codes are received that determine the current state of the counter of 10 pulses. The third input, the functional south of the transducer 16, receives the code stored in the first register 7 and determining the amplitude value te. kuschego impulse. The functional converter 16 generates a code sequence corresponding to the instantaneous values of the current pulse, and generates a control signal for generating the following process parameter values.

Functional Converter 16 operates as follows.

When the trigger position is 28 & a single (initial) STATUS, the control signal from its output goes to the control input of the fourth memory block 25, allowing information to be read. The clock sequence arrives at the counting input of the counter 24 addresses, the codes from the output of which arrive at the address input of the fourth block 25. In this way, sequential reading of the ordinate codes of a pulse signal of a software-defined form with a frequency inversely proportional to the value of the length code is provided. pulses. Codes read from

the fourth memory block 25, is received as the first operand to the second input of the multiplier 23, and the amplitude code of the current pulse, in the first register 7, enters the first input of the last.

At the output of the multiplier 23, the values of the orders of the pulse signal, directly proportional to the amplitudes of the current pulse, are received at the second output of the functional converter 16.

At the end of the formation of a single pulse (the counter reaches 24

The maximum value) at the output of the first decoder 26 produces a signal arriving at the second installation input of the trigger 28 and setting it to the zero state. Wherein

at the output of the trigger, a signal is generated that prohibits the reading of information from the fourth memory block 25.

The codes corresponding to the pulse counter 1O arrive at the second input of the functional converter 16, and when the interval formation ends (when the pulse reaches the single state pulse 1O), the output of the interval formation signal is output at the output of the second decoder. This signal arrives at the installation input of the 24. Address counter, sets it to the initial state, translates the trigger 28 into a single state, and enters the input of the sensor 4 random numbers. After this, the formation and transfer to the registers 7 and 8 and to the counter 1O of the pulses of the new values of the pulse parameters occurs.

The code sequence, which determines the instantaneous values of the pulse process, generated at the second output of the functional converter 16, is supplied as the first operand.

to the input of the adder 17. To the second input of the adder 17, codes defining the values of a continuous random process are received. To synchronize and control the generation of the codes of the continuous random process, the third generator 22 is used. In the initial state, the first 11 and second 12 counters are located in zero states Taktova after-

The output from the third generator 22 is fed to the input of the first counter 11, and the codes from the output of the last post T1 are input to the second memory block 2 and to the first (address) input of the third memory block 3. At the same time, information is read to the specified addresses in the memory blocks. In addition, the codes from the output of the first counter 11 are fed to the first input of the functional converter 2O, to the second input of which information is received, counted from the third memory block. The third input of converter 20 receives a code determining the state of the second counter 12. Code 1 determining the state of the first counter 11 goes to the first second device; and 31 multiplying 31, the second input receives the code K determining the state the second counter 12. At the output of the multiplier 31, a code is generated equal to the product i K, which is nocTjTiaeT at the first input of the second adder 32. The second input of the second adder 32 receives the code from the output of the third memory block 3, which determines the value of the random phase P { ) .At the exit Converter 2O in accordance with each state of the first counter, the value of the argument is generated - 1 K i -f (V. The argument code t 5 - (K) is fed to the input of block 1 of trigonometric functions, the output of which is the cosine value of the argument () in accordance with the formed value C: j. The value is fed to the first input of the 18th unit, the second input of which receives the codes of the values of the coefficients Pp (i; amplitude spectrum of a continuous random process, coming from the output of the second 2 ms. The function of the accumulation unit 18 includes the formation of the sum 4) cos, j where N is the maximum code value in the first counter 11. At the output of the third multiplication device 29, the value of the products Pp COCOv is generated, which is fed by. input of accumulator AOR accumulating type). At its output, the sum of the products Pp (.) Is formed, which arrive at the second input of the adder 17. At the output of the adder 17, codes are formed, which are the sum of the codes defining the pulsed and continuous processes. Codes from the output of the adder 17 are fed to the input of the third register 9, which is written to after the end of the formation of the sum. |%, e-i) cosp. When the first counter 11 reaches the maximum value at its output of the transfer signal, a signal is generated which receives the code from the output of the adder 17 to the third register 9. The same signal enters the input of the second counter 12; increasing the unit value of the code determining its state and to the third input of the accumulation unit 18. In this case, the accumulator of the accumulator of the accumulator type is set to the zero state. Thus, a new cycle of forming a continuous process begins. . The codes defining the values of the random process come from the output of the third register 9 to the input of the code-voltage converter 14, at the output of which an analog signal is generated. The module 15 of the polarity transmits a signal from the output of the converter 14 code-voltage to the device's voltage either to maintain its polarity or to change it to the opposite in accordance with the pulse amplitude code stored in the first register 7. Upon reaching the first 11 and second 12 the maximum value counters at the output of the transfer signal of the second counter 12 generate a signal, by which new values of random codes generated by the generator 21 of uniformly distributed random numbers are entered into the third memory block ci. In this way, a new period of formation of the non-rift process begins. The technical and economic efficiency of the proposed device is determined by the fact that it allows the formation of a random process with a complex signal form, makes it possible to form shock (pulsed) and uninterrupted random processes separately, allows you to simulate the reflected signals propagated in various media take into account the influence of various random factors on them, as well as simulate the spinning processes that are adequate to the processes in real conditions during the transportation of products, the operation of the system communication, etc ...

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Claims (1)

{54) ATOP GENERIC OF A RANDOM PROCESS, comprising a first memory block, the output of which is connected to the first control input of the random number sensor, the output of which is connected to the control input of the pulse counter and to the inputs of the first and second register ”memory, the counting input of the pulse counter is connected to the output the first pulse generator, the output of the second memory register is connected to the control input of the frequency divider, the information input of which is connected to the output of the second pulse generator, the first output of the first memory register is connected to directs input polarity modulator having an information input connected to the output of the code-voltage converter, and the output of the polarity modulator is the output of the generator distinguishing *. in order to increase accuracy, two functional converters, an adder, a third memory register, a second and third memory blocks, a uniformly distributed random number generator, an accumulation unit, a trigonometric function generation unit, the first and second counters and a third generator were introduced pulses, the output of the frequency divider is connected to the first input of the first functional converter, the second input of which is connected to the output of the pulse counter, the second output of the first memory register is connected to the third input of the first about a functional converter, the first output of which is connected to the second control input of the random number sensor, the second output of the first functional converter is connected to the first CVC of the adder, the output of which is connected to the information input of the third memory register, the output of which is connected to the input of the code-voltage converter, the second input of the adder connected to the output of the storage unit, the first input of which is connected to the output of the second memory unit, the input of which is connected to the information input of the third memory unit, p by the first input of the second functional converter and the output of the first counter, the output of the third block pa and g, 1022161 of the memory is connected to the second input of the second functional converter, the output of which is • connected to the input of the trigonometric function generation unit, the output of the latter is connected to the second input of the storage unit, the third input of which connected to the control input of the third memory register, the input of the second counter and the output of the transfer signal of the first counter, the input of which is connected to the output of the third pulse generator s, the second counter output is connected to the third input of the second function converter, the output of the generator are uniformly distributed random numbers connected to the address input of the third memory unit, a control input of which is connected to the output of the second counter signal transfer.