SU1001003A1 - Inertial device - Google Patents

Description

(54) INERTIAL DEVICE

one

The invention relates to radio analog devices and can be used in PI controllers with adjustable constant integration time.

Active inertial devices are known that contain an operational amplifier with a passive parallel circuit connected between the output and the inverting input of the Cl3 operational amplifier. A disadvantage of the known inertial devices is the impossibility of controlling the constant integration time.

The closest in technical essence to the proposed device is an inertial device containing an operation amplifier, to the inverting input of which the first outputs are connected to a capacitor and a resistor, the second output of the capacitor is connected to the output of the operational amplifier, and the second output of the resistor to the engine of the potentiometer connected extreme conclusions between

the output of the operational amplifier and the zero potential bus, the input signal source being connected through the coupling resistor to the inverting input of the operational amplifier f 2.

The disadvantage of the device is the low range of constant time control.

The purpose of the invention is to expand the range of adjustment of the constant integration time.

The goal is achieved by the fact that in the inertial device containing an operational amplifier, the first terminals of the first capacitor are connected to the inverting input of which. the third and fourth resistors and the source switch of the initial state, as well as the potentiometer, are connected to the resistor and the third and fourth resistors, and the output of the operational amplifier is connected to the moving contact of the potentiometer, the extreme terminals of which are connected respectively to the second terminals of the first resistor and the capacitor and through the third and fourth resistors - with a zero potential bus. The drawing shows a diagram of the inertial device. The inertial device contains an operational amplifier 1, to the inverting input of which are connected the first terminals of the capacitor 2, the first resistor 3 and through the second resistor 4 connected in series, and the key 5 the source 6 of the initial state setting, as well as the potentiometer 7 and the third and fourth resistors 8 and 9 entered and the output of the operational amplifier is connected to the lodging potential of the potentiometer, the extreme terminals of which are connected}, respectively, with the second terminals of the first resistor and the capacitor and through the third and fourths resistors with zero potential bus. The inertial device operates as follows. The initial level of the voltage on the capacitor 2 is preliminarily established with the help of the source 6 of the initial state setting, after a certain initial state is established.

Nick 6 is turned off with the key 5. At the extreme position of the slider of potentiometer 7 (the first case) all voltage from the output of operational amplifier 1 is applied to resistor 9 and resistor 8, and to resistor 8 and capacitor 2 only a part of the voltage determined by a resistive divider 7 and 8 "

In the extreme right position of the potentiometer slider 7 (second case), all the voltage from the output of operational amplifier 1 is applied to resistor 8 and capacitor 2, and to resistors 9 and 3 only the part determined by resistive divider 7 and 9. Condenser 2 is discharged. Assuming that the resistance of the resistor 3 is much greater than the resistance of the resistor 7, it can be qualitatively estimated that in the first case the time constant of the inertial device is minimal, and in the second it is maximum. The quantification of the range of adjustment of the constant integration time is determined by the mathematical dependence.

Denoting Ugj ,, is the output voltage on amplifier 1; Uj, Ug

and, respectively, the voltage drop across resistors 3, 9, and 8; U2 is the voltage across the capacitor; - relative polo up

or

(s)

g fi + Q

ps

.} where 1 + 2Q

From the expression (6) it follows that with a change in d. from 1 / n to 10 / n, the time constant of the inertial device changes by a factor of 100, while the prototype has an order of magnitude less.

Claims (1)

Invention Formula An inertial device containing an operational amplifier, to the inverting input of which are connected the first outputs of the capacitor, the first resistor and the serially connected second resistor and the key source for setting the initial state, as well as a potentiometer, characterized in that of the integration time, the potentiometer's engine from the left ora, we get, xm: il- (5) time is the ratio of the voltage on the capacitor 2 to the rate of change of this voltage, equal to eniyu thzha capacitor discharge of capacitor 9 (3) in terms dstaviv depending 7G- "9. (4) 51001 of it are the third and fourth peancTOfry, and the output of the operational amplifier is connected to a moving contact of a potential meter, the extreme terminals of which are connected respectively to the second terminals of the first resistor and code sensor and through the third and fourth resistors. 03 Sources of information taken into account during the examination 1. Instruments and control systems, 198O, No. 1, p. 22, fig. 2 a, b. 2, Bank M. U. Analog integrated circuits in radio equipment. Radio and Communication, 1981, p. 56, fig. 4.11 (prototype).