RU2039959C1 - Device for correction of axial unbalance of dynamically erected gyroscopes - Google Patents

Abstract

FIELD: balancing. SUBSTANCE: device for correction of axial unbalance of dynamically erected gyroscope has body 2 accommodating coils 3 of torque motor 3 and encasings 4 of the variable- capacitance angle angle-data transmitter. Located in the body are the drive, using electric motor 7 and shaft 13 intended for attachment of torsion bars 14, intermediate and locating rings 15 and 16, and handwheel 17 on it. The angle data transmitter is connected to the inputs of the feedback amplifier, whose output together with the power source is connected through a switch to the torque motor. At continuous rotation of shaft 13 with handwheel 17 axial unbalance and its correction are determined simultaneously. EFFECT: enhanced balancing capacity. 7 dwg

Description

 The invention relates to instrumentation, in particular to balancing dynamically tuned gyroscopes.

 A known installation for correcting imbalances of DNG in a vacuum [1] containing a base, a technological case, a gyro rotor angle sensor, a correction tool made in the form of screwdrivers for screwing balancing screws, and a mechanism for moving it.

 Known DNG [2] comprising a housing, a drive placed thereon, torque sensor coils and an angle sensor, a shaft mounted in the housing for fixing torsions of the intermediate and landing rings and a flywheel on it, a feedback amplifier connected to the angle sensor, and a power source .

 The disadvantage of this device is the low performance of the correction of axial imbalance of DNG.

 The aim of the invention is to increase the performance of the correction of axial imbalance of DNG.

 This is achieved by the fact that the proposed device is equipped with a switch, the inputs of which are connected to the feedback amplifier, and the output with the coils of the torque sensor. This makes it possible to correct the axial imbalance by moving the flywheel mounted on the landing ring with the possibility of axial movement, under the influence of electromagnetic forces of interaction of the flywheel with the coils of the torque sensor.

 In FIG. 1 shows a device for correcting axial imbalance of DNG; in FIG. 2 section aa in figure 1; figure 3 view along arrow B in figure 1; figure 4 is a block diagram of a device for correcting axial imbalance of DNG; figure 5 connecting the coils of the torque sensor in the mode of determining the axial imbalance of DNG; in FIG. 6 connection of the moment sensor coils in the mode of axial unbalance correction of DNG; Fig.7 connection of the coils of the torque sensor in a combined mode.

 The device for correcting the axial imbalance of DNG contains a base 1 on which the housing 2 with the coils of the sensor 3 of the moment and the plates of the capacitive angle sensor 4 on the substrate 5 is fixed. The housing 6 is equipped with a drive 6 containing an electric motor 7, a shaft sleeve 8 and bearings 9. Gaskets the capacitive angle sensor 4 is connected to the inputs of the feedback amplifier 10, the output of which together with the power source 11 is connected through the switch 12 to the coils of the torque sensor 3.

 The operation of the device is as follows. A shaft 13 with torsion bars 14, an intermediate ring 15, a seat ring 16 and a flywheel 17 with an annular permanent magnet 18 fixed thereon is inserted into the sleeve 8. With a drive 6, a shaft 13 with an elastic suspension is deployed (torsion bars 14, the intermediate ring 15, the seat ring 16) and flywheel 17 to a position in which one pair of torsion bars 14 is in a horizontal plane.

With the axial displacement of the center of mass of the flywheel 17 from the axis of the horizontal torsion bars 14, a moment appears that turns the flywheel through an angle α ₁ .

(1) где P вес маховика 17;
Δ₁ осевое смещение центра масс маховика 17 от оси первой пары торсионов 14;
С₁ угловая жесткость первой пары торсионов 14.α ₁

(1) where P is the weight of the flywheel 17;
Δ ₁ axial displacement of the center of mass of the flywheel 17 from the axis of the first pair of torsion bars 14;
With ₁ angular stiffness of the first pair of torsion bars 14.

When the shaft 13 with the elastic suspension and the flywheel 17 is rotated to the position where the axis of the second pair of torsion bars 14 is aligned with the horizontal plane, in the case of the axial displacement of the center of mass of the flywheel 17 from the axis of the second pair of torsion bars 14, a moment appears that turns the flywheel 17 through the angle α ₂ .

(2) где Р вес маховика 17;
Δ ₂ осевое смещение центра масс маховика 17 от оси второй пары торсионов 14;
С₂ угловая жесткость второй пары торсионов 14.α ₂

(2) where P is the weight of the flywheel 17;
Δ ₂ axial displacement of the center of mass of the flywheel 17 from the axis of the second pair of torsion bars 14;
With ₂ angular stiffness of the second pair of torsion bars 14.

осуществляется осевое смещение маховика 17 относительно посадочного кольца 16. Перемещение маховика 17 производится на величину
Δ₃

(5) причем
Δ₁ Δ₃ ± δ
Δ₂ Δ₃ ± δ (6) При этом будет наблюдаться остаточный момент
М₃ ± P ˙ δ (7) Контроль перемещения маховика производится по сигналу с датчика угла 4 и прекращается при достижении величин углов

±

(8)

±

При подключении катушек датчика момента 3 в комбинированном режиме часть их (а именно 2, 4, 6, 8) работает в режиме определения осевого дисбаланса, а часть (1, 3, 5, 7) в режиме коррекции осевого дисбаланса. В этом случае перемещение маховика 17 контролируется по сигналу с катушек датчика 3 момента и прекращается при достижении величины остаточного момента М₃.When connecting the coils of the torque sensor 3 in the axial imbalance determination mode, the signs and values of the moments are determined
M ₁ P ˙ Δ ₁ (3)
M ₂ P ˙ Δ ₂ (4)
Next, the coil of the sensor 3 of the moment are connected in the correction mode of the axial unbalance. Moreover, under the influence of electromagnetic forces of interaction of the annular permanent magnet 18 and currents in the coils of the torque sensor 3

the flywheel 17 is axially displaced relative to the seat ring 16. The flywheel 17 is moved by the amount
Δ ₃

(5) where
Δ ₁ Δ ₃ ± δ
Δ ₂ Δ ₃ ± δ (6) In this case, the residual moment will be observed
M ₃ ± P ˙ δ (7) The flywheel is controlled by the signal from the angle sensor 4 and stops when the angles are reached

±

(8)

±

When connecting the coils of the torque sensor 3 in the combined mode, part of them (namely 2, 4, 6, 8) works in the mode of determining axial imbalance, and part (1, 3, 5, 7) in the mode of correction of axial imbalance. In this case, the movement of the flywheel 17 is controlled by a signal from the coils of the torque sensor 3 and stops when the residual moment M _{3 is} reached.

 With the continuous rotation of the shaft 13 with an elastic suspension and a flywheel 17, the axial imbalance is simultaneously determined and controlled with its compensation. In this case, the torque sensor coils 3 are connected in the axial unbalance compensation mode (the control signal is taken from the angle sensor 4) or in the combined mode (the control signal is removed from the part of the torque sensor 3 coils operating in the axial unbalance determination mode). The movement of the flywheel 17 stops when zeroing over the period of rotation of the control signal.

 Fixing the flywheel 17 in a balanced position is done by welding the flywheel 17 with the seat ring 16 or by polymerizing the glue applied immediately before balancing on the seats of the flywheel 17 and the seat ring 16. After compensating the axial imbalance and fixing the flywheel 17 in the balanced position, the shaft 13 with elastic suspension and the flywheel 17 is removed from the sleeve 8 and transmitted to subsequent technological operations.

Claims (1)

 DEVICE FOR CORRECTION OF AXIAL IMBALANCE OF DYNAMICALLY ADJUSTABLE GYROSCOPES, comprising a housing, a drive placed thereon, a torque sensor coil and an angle sensor, a shaft installed in the housing for fixing torsion bars of the intermediate and landing flywheel rings, a feedback amplifier connected to the sensor and a power source, characterized in that, in order to increase productivity, the device is equipped with a switch, the inputs of which are connected to a feedback amplifier and a power source, and in turn coils torque sensor.

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