SU529460A1 - Pneumatic device for calculating linear function - Google Patents

Description

(54) PNEUMATIC DEVICE FOR CALCULATION OF LINEAR FUNCTION

stacks with a correction signal using an additional adder.

The disadvantages of the known variant are the circuit-hardware complexity and low general accuracy of the calculations, due to the fact that the range of variation of the correction signal is comparable with the error of the additional adder.

The purpose of the invention is to improve the accuracy of the work of the VU.

For this purpose, a shift amplifier and a switch are installed in the device, the second direct input of the differential membrane amplifier and the feedback choke divider input are connected via a switch to the correction signal channel and the output of the repeater with a shift of the input camera.

The drawing shows a schematic diagram of the proposed device.

The device contains two choke adders 1 and 2, a membrane differential amplifier 3, a choke feedback divider 4, a repeater 5 with a shift, and a switch 6.

Input channels of the device signals P, and P ;. connected to the inputs of throttle adders 1 and 2, the outputs of which are connected respectively to the first direct and invariant inputs of the amplifier 3, the output of which is connected through divider 4 to its second input terminal and connected to the output channel of the device. The other direct input of the amplifier and the input of the divider 4 are connected via a switch 6 to the channel of the correction signal РКОР and the output of the repeater 5 with an offset, to the input camera of which the channel of the correction signal is connected.

The device works as follows

The pressures in the output channels of the choke adders 1 and 2, proportional to the direct and inverse to the partial sums, are summed up taking into account the sign on the membrane unit of the amplifier 3 and are amplified by the feedback divider. The required values of the scale factors are provided by the appropriate setting of the throttle adders and the selection of the transfer coefficient K Q (the throttle divider, and the offset is introduced using an offset repeater.

Depending on the position of the switch, the device operates in one of two modes: with positive values of the bias, the repeater output is connected to another direct input of the difference amplifier, and the channel of the correction signal is connected.

Zenin with the input of the divider 4; at negative offset values, the connection is reversed.

The repeater output is equal to the sum of the correction signal and the bias, so the correction signal is always fed simultaneously to two inputs: the direct input of the amplifier and the input of the feedback divider. Since the total transfer coefficient for these inputs is equal to one

-(-TO,

m).

WITH

v

to

wasp

changes in the correction signal lead to the same changes in the output signal of the RT.

The application of the proposed device will allow halving the error in calculating the indicators of the fractional composition of products in the separation process: x mixtures, for example, by the method of absorption gas fractionation.

Claims (3)

1.Birman A.I., Ovezov B.B. Modeling linear regression equations by means of pneumatic computational techniques. - Izvesti TSSR, series of physico-technical sciences, 1969, No. 4. 2. USSR author's certificate number 121289, M.Kl. G About G 5 / OO. 3. USSR author's certificate No. 452831, M.C. G 06 & 5/00 (prototype).