SU441582A1 - Static Error Compensator - Google Patents

Description

one

The invention relates to the systems of automatic control and regulation

Static error compensators are known that contain a correction element made in the form of transformers connected via a rectifier to an adder and a compensating drum with a screen.

However, such devices have a small number of corrections for the period of change in the output signal, and also they do not provide the possibility of automatically adjusting the required law of change in the output signal from the input signal and high accuracy of operation.

The proposed static error compensator is different in that it introduces a generator and flux-probes made in the form of a branched magnetic circuit with a gap c with recording, biasing and output windings, and the outputs of the generator P are connected to the windings of the magnetizations

ferroprobes, the output windings of which through a rectifier are connected to an adder, and the compensating drum of the contractive element is equipped with magnetic tapes attached to the ends of the drum and located in the gaps of the magnetic circuits of the flux-probes.

This embodiment improves the accuracy of the device.

Figure 1 shows the principal compensator circuit; FIG. 2 is a structural diagram of a compensator; Fig, 3 - performance of the fluxgate.

The compensator contains (see FIG. L) a corrector I with resistors 2, 3 and potentiometers, 5, low-power transformers 6 and 7 with electrostatic screens 8 and 9, a compensating drum U, a frequency generator II, flux probes 12 and 13, amplifiers 14 and 15 , rectifier 16-19 and adder 20,

Structurally, the nompendatos were performed as follows (figure 2). On the shaft 21 there is a compensating drum Yu fixed, which is a flyz-screen 2, covered with a magnetically insulating material. In the central part of the drum there is a disk 23 with magnetically insulated lapestkash 2 into which adjusting BINTS are inserted. At both ends of the drum there are magnetic L9NTY 25 and 26 in the form of magnetically insulated sections covered from the inside with a magnetic composition. The receiving elements of the compensator are transformers b and 7 and flux-probes 12 and 13. The receiving elements 6, 7, 12, 13, as well as the shaft 21 of the compensator are mounted on covers 28 and 29 fixed in the housing 27, with the shaft 21 being bearings. The drum 10 has openings in the outer diameter for the input and output of adjusting screws and the nest of air gaps between the magnetic conductors of transformers 6.7 and lobes 24 located on the disk 23о Three holes are made in the housing 27: one for inserting the adjusting screws and adjusting the air gaps between the magnetic cores transformers and petals 249 two others - to adjust the gaps between the front and rear probe 12 and 13 m magnetic tape W 25 and 26, For turning the shaft 21 JOOTEBTCT VII with the value of the input signal, you can use different keys matic transmission. warrzondy 12 and 13 are enclosed in E1p :) and 31. Magitololod 32 ferrosonde (see Fig, 3) is assembled from plates of a magnet of a soft material and provided with windings 33,34 and 35. The windings 33 and 34 are receiving, each of them consists of two half-windings . Together with the magnetic core 32, they constitute one ferrosonde, whose work is based on the appearance of even harmonics in the AC windings when the magnetic core is biassed by a magnetic flux in one direction. Magnetic flux of one direction of snmambtsn from magnetically insulated sections of magnetic insulation Winding 355 consists of two half-pins, intended to apply and erase the recording on magnetic tape. This winding is located in the central part of the magnetic conductor “and 66 is located in special slots of the magnetic circuit. The winding 33 is powered by high frequency alternating current - From the output of the winding 34, the voltage U2 is removed, corresponding to even harmonics. When writing to the inputs of the winding 35, a constant voltage signal is applied (75 "the value of which corresponds to the required magnetic flux. When erasing recordings from a magnetic tape, the voltage transferred to the winding inputs with the required frequency, for example 50 Hz, is applied. The proposed compensator works as follows At a certain value of the input signal, the shaft 21 (see FIG. 2), and thus the compensating drum 10 is set to the desired position. This removes the voltage Uvy (cm, figl), the magnitude and the polarity of which corresponds to the angular position of the shaft (see Fig. 2). Obtaining the required magnitude and polarity of the output voltage depending on the input signal is carried out by changing the magnetic induction in the magnetically isoated sections of magnetic tapes 25 and 26, as well as the impedance of the magnetic resistance During the input and output of the adjustment. X BINTS into the talo from the body of the petals 24 o The recording on magnetic tapes 25 and 26 is ensured by the constant voltage Ug of the fluxgate 12 and 13, the voltage value (Jj depends on the angular position Shaft At the output of each transformer 6 or 7, a rectifier 18 and 19 is installed, respectively. This is done in order to eliminate the error of the phase angle B of the output voltages C and C / 2 of the transformers. Each ferrosonde should produce a voltage whose amplitude smoothly depends on the angle of rotation of the shaft 21. For this, it is NECESSARY that the magnetic flux probe of the fluxgate has a width corresponding to several magnetically insulated sections of magnetic tape 25 and 26, the primary windings 33 of flux-probes feed the second frequency generator. At the output of each flux probe, a pin of series-connected amplifier 14 or 15 and rectifier 16 or 17 is installed. The output voltages of rectifiers 16-19, different in size and fullness, are added to the sumimator 20. The polarities of the voltages at the output of the rectifiers 16 and 17 in the Ferrozondot circuits have opposite signs; the voltages at the output of the rectifiers 18 and 19 in the circuits of the transformers 6 and 7 are reverse polarities.

Pummator 20 includes a voltage divider system and is intended for pumirs of either different magnitudes and polarities of stresses, as well as for relieving residual voltages. In addition, the 2C petals in the disk 23, as well as the magnetically insulated sections of the magnetic tapes 25 and 26 are shifted relative to each other, the UTR provides a large number of corrections for the period of change of the monitored parameter, and hence the smoother dependence of the output voltage of the Ovy static error compensator on angle of rotation of the shaft 21.

To reduce the mutual influence of magnetic fields, screens 30 and 31 are provided on the heads of Forrozondp-p. and on the tompt of transformers to and 7 are screens 8 and 9. In addition, the compensating drum 10 has a flange-screen 22.

Adjustment of the compensator is carried out as follows. The magnetic tapes 25 and 26 use constant magnetic fluxes generated by the windings of 35 flux-probes (ohm .. G) to record the required law of change in the output voltage Usb / x from the angle of rotation.

shaft 21. At the same time, the inputs and outputs of the Ferrozond are disconnected. After recording on magnetic tapes 25 and 26 pi. taniv 35 is turned off. Errors in recording and retrieving information in Willow's output voltage. at the corresponding values of the input signal are eliminated with the help of the corrector I, working with resistors 2 and 3 and with potentiometers 4 and 5, as well as with the voltage divider system, which is part of the adder 20.

SUBJECT OF INVENTION

A static error compensator containing a correction element, made in the form of transformers connected via rectifiers to an adder, and a compensating drum with a screen, which is distinguished by the fact that, in order to improve the accuracy of the device, a generator and ferrozond are introduced in the form of a branched a magnetic circuit with a gap and with recording, biasing and output windings; the generator outputs are connected to the windings of the magnetic flux probe magnetizations, the output windings of which through a rectifier dklyucheny to umiatoru ,. and the compensating drum of the corrective element is provided with magnetic tapes fixed at the ends of the drum and located in the gaps of the magnetic cores and erozondov.

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fig.Z