SU1137485A1 - Analog computing device - Google Patents

Abstract

ANALOG COMPUTING DEVICE containing a multiply block, low pass filter and integrator, the integrator output is the output of the device, characterized in that, in order to improve the accuracy of the device and expand the functionality of the device by performing division operations, an inverter is entered into it the multivibrator, the first, the second and the third switches, and the outputs of the first and second switches are connected to the first and second inputs of the multiplication unit, respectively, the output of the multiplication unit is connected to the first input The third switch, the output of which is connected via the low-pass filter to the integrator input, the multiplier unit output is connected via the inverter to the second input of the third switch, the first input of the first switch is the first input of the device, the second input of the first switch and the second inputs of the second switch are the second and third inputs of the device, respectively, the output of the multivibrator is connected to the control inputs of the first, second and third switches. 10 11 ОО 4 00 СП

Description

The invention relates to electrical computing devices and can be used in analog computers. One of the known multiplying devices contains an intrator, a filter, and a multivibrator ij. The disadvantage of this device is low accuracy of operation. The closest to the proposed is an analog computing device that contains a unit with a multiply low-pass filter and an integrator. The well-known analog computing device is characterized by low accuracy due to the presence of uncompensated additive multiplier unit, limited functionality and the impossibility of matching with digital devices. The purpose of the invention is to improve the accuracy of the operation, to expand the functionality by performing a division operation and to simplify coordination with digital devices. For this purpose, an analog computing device containing a multiplication unit, a low-pass filter and an integrator, the integrator output is an inverter, a multivibrator are introduced, the first, second and third switches, the outputs of the first and second switches, respectively, are connected to the first and second inputs of the multiplication unit, sheath is coupled to the first input of the third switch, the output of which through a low pass filter connected to the input of the integrator, the output unit. multiplying through the inverter is connected to the second input of the third switch; the first input of the first switch is the first input of the device; the second input of the first switch is connected to the output of the integrator; the first and second inputs of the second switch are the second and third inputs of the device, respectively; the output of the multivibrator is connected to the controller the inputs of the first, second and third switches. Figs 1 and 2 show the functional diagrams of the proposed analog computing device. The device contains a multiplier 1, an inverter 2, a filter for the usual 5 frequencies 3, an integrator 4, a multivibrator 5, the first, second and third switches 6.7 and 8, first, the second and third inputs 9.10 and 11 and output 12, the converter 13 voltage - frequency, frequency converter 14 frequency - voltage, additional output 15, Analog computing device operates as follows. Let the half-period frequency of the multivibrator 5 to the inputs of the multiplication unit 1 are connected to the signals from the first and third inputs 9 and 11, a. the output of multiplier 1 is connected directly to integrator 4, the change in voltage on integrator .Рre 4 over this interval, assuming -i SRI, that the transform function of the multiplication unit, Z .j, bU, -Kv, a Mnthlil Jt, (2) where Kc is the block transfer coefficient.: multiplying 1 ;, x, y are the signals at the first and third inputs 9 and t1; the integrator constant 4, the next half-period of the multivibrator 5 multiplies the signals from the second input 10 and from output 12, and the integration occurs in the opposite direction and the voltage on the integrator is: uU2) pli) Ji (3) t / g where K (t ), / 3 (t) - signals at the second input 10 and output 12, the signal at the output of the integrator 4 changes until the average value of the voltage during the integration time is zero, In the steady state, the average value of the signal at output integratoa 4 for the time interval determined by the spectral characteristics ticks signals is zero. Then, by equating (2) and (3), we get: xltl lD-orit / Ht), (4) the devil from above means the average reading.

311

Over the half-period of the multivibrator 4, it is assumed that the signals are nicely changed.

If we additionally assume that the signal A (t) changes little during the period of the main harmonic of the signals, then, taking into account (

SHCHY (iG

 (five)

From (3) it follows that the result does not depend either on the additive or on the multiplicative errors of the multiplication unit 1, nor on its transmission coefficient n% f.

.2 shows a functional diagram of the proposed analog computing device of example 374854. .

related to digital devices.

For this case, the relation is:

(6)

,

(, (c - transfer coefficient;

de k converter frequency 14 - voltage. From (b) it follows:

x (tiya)

i (

".-to

PKN

Thus, in comparison with the prototype device, the proposed analog computing device has an increased work accuracy and wider functionality.

Claims (1)

ANALOGUE COMPUTER DEVICE containing multiplication unit, low-pass filter and integrator, integrator output is the output of the device, characterized in that, in order to improve the accuracy and expand the functionality of the device due to the operation of the division. the inverter, the multivibrator, the first, second and third switches are introduced into it, and the outputs of the first and second switches are connected to the first and second inputs of the multiplication unit, respectively, the output of the multiplication unit is connected to the first input of the third switch, the output of which is connected to the input through a low-pass filter integrator, the output of the multiplication unit through the inverter is connected to the second input of the third switch, the first input of the first switch is the first input of the device, the second input of the first switch is connected with the output of the integrator * § torus, the first and second inputs of the second switch are the second and third inputs of the device, respectively, the output of the multivibrator is connected to the control inputs of the first, second and third switches.