SU1120369A1 - Device for simulating inductance coil - Google Patents

Abstract

A DEVICE FOR MODELING INDUCTION, containing the first, second and third voltage amplifiers, between the outputs and the non-inverting input of the first and the first non-inverting inputs of the second and third voltage amplifiers, phase-shifting shifts are included. a capacitor and a resistor with a controlled conductivity, which are connected respectively between the first non-splicing inputs of the second and third voltage amplifiers and the zero potential bus, non-inverting the input of the first and the first non-inverting input of the second voltage suppressor, respectively, the inverting input of the first amplifier connected to a first non-inverting input of a second voltage amplifier, characterized in that, in order to increase its accuracy by providing the ability to model the inertialess inductance, the second non inverter input of the second voltage amplifier is connected to the first noninverting input of the third voltage amplifier, the second noninverting input of which. connected to a non-inverting input. h kn) b of the first voltage amplifier. tnaok ibO

Description

The invention relates to analog computing and can be used to model parametric differential equations, as well as to build various devices, the characteristics of which should not depend on the rate of parameter adjustment. Known devices W imitating when connected as a load of a tunable resistor, the inductance, the voltage on which is defined as.,. ,, JUti aiai Ult) L {ll-M (tl-. However, the second term of this interference corresponds to the component voltage of the rate of change of the parameter L (t), which in many cases significantly limits the functionality of parametric devices, reducing their speed and operating frequency range. The closest to the invention is a device for modeling inductance, containing the first, second and third voltage amplifiers with resistive circuits of positive feedback, and the non-inverting input of the first amplifier It is the input of the function generator, the inverting input of the first voltage amplifier is connected to the non-inverting input of the second voltage amplifier, the inverting input of the second voltage amplifier is connected to the non-inverting input of the third voltage amplifier, the inverting input of the third voltage amplifier is connected to the input of the function generator, bipolar circuit with a conductivity equal in magnitude to the required resistance of gyration, and non-inverting to the stroke of the second voltage amplifier is with the output of the device 2j. A disadvantage of the known device is that the voltage at its input depends on the speed of the adjustment (if a resistor with controlled conductivity is used as a load and the gyration resistance is S). This follows from the form of an external description of the device circuit in the frequency domain where If (S) is the function of flux linking, and (S) is the input voltage, UnCS) is the output voltage (at the load), I, (S) - input current. Then, with respect to the input terminals Uj (s) S4; (s) or in the time domain IKH- -Kfl - /.) Qi | --c L (t) -j | -f, (i) -, i.e. there is a component voltage of the rate of change of parameters .i ,, M .. The goal is achieved by the fact that in the device for modeling the inductance containing the first, second and third voltage amplifiers, between the outputs and the non-inverting input of the first and the first non-inverting inputs of the second and third voltage amplifiers, a phase-shifting capacitor and a controlled resistor are included conductivity, which are connected respectively between the first non-inverting inputs of the second and third voltage amplifiers and the zero potential bus, non-inverting The first and first non-inverting input inputs of the second voltage amplifiers are the input and output of the device, the inverting input of the first voltage amplifier is connected to the first non-inverting input of the second voltage amplifier, the second non-inverting input of the second voltage amplifier is connected to the first non-inverted third input of the third voltage amplifier the second noninverting input of which is connected to the noninverting input of the first voltage amplifier.

The drawing shows a diagram of the proposed device.

The device contains the first 1, second 2 and third 3 voltage amplifiers, the first 4, second 5 and third 6 large-scale resistors connected to the feedback circuit, phase shift common capacitor 7, controlled-conductivity resistor 8c, input 9 and output 10.

The device works as follows.

The system of device unit equations is as follows:

de (s)

the input voltage, and (8) the voltage across a resistor with controlled conductivity,

U (S) voltage on capacitor

convolution in the frequency domain,

conductivity i-ro resistor,

complex frequency

Gain factor

TO

13 i-ro amplifier input. Connected to the jth amplifier. Provided that

 one,

to

 TO

P - 21

23

31

3

"

G 1,

G

nodal conduction atria

1 About S

OO

Ц5ИОг (5)

Uil)

L o-1

conductivity rel (input of device J

 IGGYY 1i5U9

-. 1L)

Then in the time domain the voltage at the input of the device

JUtJ

U, lt HWc3i

WHAT corresponds to a non-inertia inductive element, since there is no component

Uw

Mtv

dt

The technical and economic efficiency of the invention is that the proposed device allows the filter to be reorganized without distorting its characteristics.

which, when using a known device, are caused by the occurrence of a voltage component of the rate of change of the parameter.

The use of the invention as control devices greatly improves the speed of the equipment, removing restrictions on the speed of adjustment. These limitations are particularly strong in high-quality analog circuits. On the other hand, the difficulties of implementing parametric systems are due to the fact that the frequency of the processed signal must be much / less than the frequency of change of the parameter. The proposed device overcomes this. the difficulty that opens up new possibilities for designing a wide class of parametric devices with great potential.

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Claims (1)

A device for simulating inductance, containing the first, second and third voltage amplifiers, between the outputs and the non-inverting input of the first and first non-inverting inputs of the second and third voltage amplifiers, the corresponding scale resistors, phase-shifting capacitor and controlled conductance resistor, which are connected respectively between the first non-inverting inputs, are included second and third voltage amplifiers and a bus of zero potential, non-inverting input of the first and first non-inverting the input of the second voltage amplifier is respectively the input and output of the device, the inverting input of the first voltage amplifier is connected to the first non-inverting input of the second voltage amplifier, characterized in that, in order to increase its accuracy by allowing simulation of inertialess inductance, the second non-inverting input of the second voltage amplifier connected to the first non-inverting input of the third voltage amplifier, the second non-inverting input of which. connected to the non-inverting input of the first voltage amplifier. *. 1120369