SU1049930A2 - Device for implementing function of two variables - Google Patents

Abstract

A DEVICE FOR REPRODUCTION OF TWO VARIABLE FUNCTIONS BY AUT, EV, No. 773642, characterized in that, in order to expand the class of reproducible functions due to the possibility of reproducing spiral functions of two variables, an inverter, a second and a third adders, a differentiating unit, a discriminator, and a second are introduced into it. the key, the inverter input is connected to the first input of the device, and its output is connected to the first input of the second adder, the output of which is connected to the discriminator input through a differentiation unit, the first output to They are connected respectively to the first control inputs of the switch and the second key, and the second year to the second control inputs of the switch and the second key, respectively, the output of which is connected to the control input of the second CF tube, the first input of the third adder is connected to the generator output linearly variable voltage, and the output of the third adder W is connected to the third input of the second key, the second inputs of the second and third adders are connected to a constant bias source.

Description

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The invention relates to computing and can be used in automatic control systems.

According to the main author. St. 773642

A device for the reproduction of functions of two variables is known, comprising three electron beam tubes of the polytron type, three memory blocks, a linearly varying voltage generator, an adder, a switch and a key, the outputs of the first, second and third memory blocks are connected respectively to the functional inputs of the first, second and the third electron tube, and the control input of the first electron tube is the first input of the device, and the input of the generator of linearly varying voltage is combined with the first in Odom and the switch is a second. the input of the device, the generator output of a linearly varying voltage is connected to the second input of the switch, the output of which is connected to the control input of the second electron beam tube, the output of which is connected to the first input of the adder, the output of which is the output of the device, the key input is connected to the first input of the device, and the key output is connected to the control input of the third electron-beam tube, the output of which is connected to the second input of the adder, and the output of the first electron-beam tube is connected to the input of the second memory block l,

The drawback of the device is that it is impossible to reproduce the spiral functions of the two pregnant. The purpose of the invention is to expand the class of reproducible functions, namely the ability to reproduce the functions of two variables having the form of a spiral.

The goal is achieved by adding an inverter to the device to reproduce the functions of two variables — the second and third adders, the differentiating unit, the discriminator and the second key, with the inverter input connected to the first input of the device, and its output connected to the first input of the second adder which through the differentiating unit is connected to the input of the discriminator, the first output of which is connected respectively to the first control inputs of the switch and the second key, and the second output to the second control The switches and the BITO key, respectively, are connected to the control input of the second electron-receiving tube, the first input of the third adder is connected to the generator output of a linearly varying voltage, and the output of the third adder is connected to the third input of the second key, the second, the second and The third adders are connected to a constant bias source.

FIG. 1 depicts graphs explaining the principle of operation of the device; on .fig. 2 is a functional diagram of a device for reproducing functions of two variables.

The device (Fig. 2) contains electrofraumatic tubes (CRTs) 1-3, for example, a type of polytron, memory blocks 4-6, a generator of linearly varying voltage (GLINE), the first adder 8, the switch 9, the first key 10, an inverter 11, a second adder 12, a differentiating unit 13, a discriminator 14, a second key 15, a third adder 16.

The introduction of blocks 11-16 allows the classes of reproducible functions to be expanded by reproducing functions of the same type, as shown in FIG. la. This type of function is often encountered when solving automatic control problems.

In order to understand the modeling principle, in FIG. L6 is a projection on the plane L O x of one turn of the helix. It is easy to see that with a decrease in the value of 4 X max, movement occurs along the upper branch of the coil, with increasing i- along the lower branch. The first case corresponds to the negative value of the first derivative of & (), the second - the positive (aSO).

Therefore, if on block 5 of memory of CRT 2, b1 is the function of the form shown in FIG. 16. and either section 1 / or section II is read, depending on the value of L, the dependence ({(a) corresponding to the function shown in Fig. 15) is provided, and when inputting the CRT 1 of the parameter i to the device output, the function f is removed ( X X) of the form shown in Fig. 1 (Me.

When it is necessary to model the FUNCTION of the species shown in FIG. iq on block 4 of memory of CRT 1, the normalized cross section of functions 1 (X, X 2) is set by the plane X.,; xl, with xj such that the section i (vj / Xg) has a maximum value (it is a sinusoid with a variable period and amplitude). On block 5 of the memory of the CRT 2, an FUNCTION of the form shown in FIG. 1b A constant offset is applied to the second input of the second adder .12, corresponding to. The CLAY 7 sweep must be matched in such a way as to read the function x, y (i) from a to point p. On. the second input of the third adder 16 is supplied with such a constant displacement o, which, summing up with the saw GLINE 7, should ensure the reading of the function FH ((I (1) from point P to point b. The device (Fig. 2) works as follows., When applying the value of x 2 output to the –first input of the device, CRT 1 removes the value of i (x ,, x), which is fed to the input of memory block 5 and scales the value of the function х т: 1 (€, Simultaneously at the second adder 12 the difference is formed L - - × -2 which, after differentiation by block 13, is fed to the input of the discriminator 14. If & Accurate, the second key 15 is closed by the discriminator sirnal, the switch 9 is open, and the signal from GLINE 7 reads the function (, (t) from point a to point p, Value x / postuyu to control input GLIN 7, provides scaling of the speed of increase of the saw, i.e., the degree of compression or expansion of the X function. (y {b) Since in block 4 of the memory, information is already available (x, g Y 1 g when the device’s input x value is output from the ETOR. CRT 2 is removed f (xj, x | ) of the type shown in FIG. 10 |. If 4 is positive, the signal from the second output of the discriminator 14 closes the switch 9 and opens the second key. 15, which provides the reading of the function X, - H () in the segment Qtl, b). Otherwise, the operation of the proposed device is similar to the work of the well-known ... Thus, along with the former functions, the proposed device makes it possible to simulate the spiral functions of two variables.

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Claims (1)

DEVICE 'FOR PLAYBACK FUNCTIONS OF TWO VARIABLES by ed. St. No. 773642, characterized in that, in order to expand the class of reproducible functions due to the possibility of reproducing the spiral functions of two variables, an inverter, a second and a third adder, a differentiating unit, a discriminator, and a second key are introduced into it, and the inverter input is connected to the first the input of the device, and its output is connected to the first input ^ of the second adder, the output of which through the differentiating unit is connected to the input of the discriminator, the first output of which is connected respectively to the first control inputs of the switch ator and the second key, and the second you *; d. stroke - to the second control inputs of the switch and the second key, respectively, the output of which is connected to the control input of the second cathode ray tube, the first input of the third adder is connected to the output of the ramp generator, and the output of the third adder is connected to the third input of the second key, the second inputs of the second and the third adder connected to a constant bias source. and., 1049930>