RU1835488C - Testing appliance for elastic bracket of dynamically adjusting gyroscope - Google Patents

Abstract

The invention relates to gyroscopic instrumentation. An object of the invention is to enable the determination of the relative displacement of the elastic axes of a suspension of a dynamically tuned gyroscope. The process of measuring the non-intersection of the axes of least rigidity consists of two steps. The first stage is balancing the center of mass of the parts attached to the elastic suspension relative to one of the axes of the smallest angular stiffness of the suspension using the balancing weight and bringing the mirrors in one plane. The second stage is the measurement of the magnitude of the angular deviation of the mirror under the action of the axial imbalance of the masses attached to the elastic suspension relative to the orthogonal axis of the least suspension rigidity. angular deviation of the mirror; non-intersection of the axes of least angular stiffness of the elastic suspension is calculated. 9 ill.

Description

The invention relates to gyroscopic instrumentation. The non-intersection of the axes of least rigidity of the elastic suspension of a dynamically tuned gyroscope (DNG) is the reason for the additional error of the device under the influence of vibrations, therefore it is important to know the amount of non-intersection for finalizing the suspension in order to compensate for this error.

The aim of the invention is to enable the determination of the relative displacement of the elastic axes of the DNG suspension.

This goal is achieved in that in the device containing the base, the mechanism for securing the suspension in the form of a drum with clamps, an arm through which the drum is mounted on the base,

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the loading mechanism of the suspension in the form of a rod intended to be connected to the elastic suspension with a balancing weight and a damping element, two mirrors are introduced, one of which is designed to be mounted on the elastic suspension, and the other is fixed on the drum at one point by the newly introduced flexible support, and in two others - by means of newly introduced studs with adjusting nuts and springs, moreover, the drum is located on the bracket with the possibility of a fixed rotation.

Fig. 1 shows an external view of an apparatus for determining the non-intersection of axes of least rigidity; figure 2 is a view of the device from the side of the mirror; in Fig.Z - rack with a flexible neck; figure 4 - clip; figure 5 - the location of elemen00

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tov of the measuring system when balancing its center of mass (position 1); figure 6 is the same after rotation of the drum 180 ° (position 2); Fig.7 is the same after a rotation of 90 ° (position 3); on Fig - the same, after adjusting the base mirror (position 4); figure 9 is the same after turning the drum 180 ° (position 5).

The device consists of a base 1, a mechanism for securing the suspension 2 in the form of a drum 3 with clamps 4, an arm 5 with which the drum 3 is mounted on the base 1, a suspension loading mechanism in the form of a rod 6 for connecting to the elastic suspension with a balancing weight 7, the damping element 8 of the mirror 9. The balancing weight 7 is mounted on the rod 6 with the possibility of axial movement. The drum 3 is connected to the bracket 5 by means of a bearing support 10. A groove 11 is made along the generatrix of the drum every 90 °, and at the base 1 there is a ball lock 12 with a compression spring.

The mirror 9 is intended to be mounted on an elastic suspension. The mirror 13 is mounted on the drum at one point by means of a flexible support 14, implemented, for example, by a flexible neck 15, and in the other two by pins 16, adjusting nuts 17 and springs 18. The attachment points of the base mirror 14 are offset relative to the fixing axes of the drum 3, which facilitates the adjustment of the angular position of the base mirror.

The process of measuring the non-intersection of the axes of least rigidity consists of two phases: the first phase is the balancing of the center of mass of the parts attached to the roller of the elastic suspension relative to one of the axes of least angular rigidity of the suspension; the second phase is the measurement of the angular deviation of the mirror 9 under the action of axial imbalance of masses attached to the suspension roller relative to the orthogonal axis of the least suspension stiffness. - - :. ..;

By moving the load 7 in the axial direction, it is ensured that the rod b with attached parts does not touch the stops present in the drum at angular positions of 0 °, 90 °, 180 °. When the drum is in the zero position, the reflections from the mirrors are recorded in the theodolite eyepiece mounted in front of the mirrors. By rotating the adjusting nuts 17, the mirrors are matched, which indicates the coplanarity of the two mirrors (position 1). Roll the drum 3 with the suspension 180 ° (position 2). If in those

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5

 .

If there is a discrepancy between the mirrors, then by adjusting the axial position of the load 7, approximately half of the mirror misalignment angle is eliminated. By turning the drum 180 ° several times and making adjustments in position 1 of the base mirror with nuts 17, and in position 2 by moving the load 7, it is ensured that, when changing positions, the coplanarity of the mirrors is not impaired. This state of the system testifies to the balance of its center of mass with respect to the horizontal axis of the least rigidity of the suspension.

The angle ± y in Figs. 5 and 6 is explained by the presence of an end runout of the suspension and the drum.

After that, the drum is rotated 90 ° (position 3). The horizontal axis becomes the orthogonal axis of least rigidity of the suspension (Fig. 7). By adjusting the position of the mirror 13 with the nuts 17, the mirrors 9 and 13 are again coplanar (position 4. of Fig. 8).

The drum is rotated 180 ° (position 5, FIG. 9) and the angular positions of the mirrors 9 and 13 are recorded on a vertical theodolite scale.

The value of non-intersection of the axes of least angular rigidity of the suspension is calculated by the formula

6

± a- K 2P

where ± a is the difference in angles between the movable mirror 9 associated with the suspension roller 2 and the stationary mirror 13 associated with the drum;

K is the angular stiffness of the suspension relative to the horizontal axis at positions 3, 4, gsm / rad;

P-mass of the roller and parts attached to it, g;

b - the value of non-intersection of the axes, see

Coefficient 2 is introduced into the formula due to the double effect of terrestrial gravity.

After the conversion, we get

6 0.103, microns.

The error from the non-intersection of the axles of the elastic suspension is part of the random component of the departures, measured at the stages of adjustment and testing of the device. The device makes it possible to determine the amount of non-intersection of the axes of least rigidity of the elastic suspension during its manufacture in order to improve the accuracy level of the device by refinement.

Claims (1)

SUMMARY OF THE INVENTION A device for testing an elastic suspension of a dynamically tuned gyroscope, comprising a base, a mechanism for securing the suspension in the form of a drum with clamps, an arm by which the drum is mounted on the base, a suspension loading mechanism in the form of a rod intended to be connected to the elastic suspension with a balancing weight and damping an element characterized in that, in order to ensure possible To determine the relative displacement of the elastic axes of the suspension of a dynamically tuned gyroscope, two mirrors are inserted into it, one of which is designed to be mounted on the elastic suspension of the gyroscope, and the other is fixed to the drum at one point by means of a newly introduced flexible support, and in the other two by means of introduced studs with adjusting nuts and springs, and the drum is located on the bracket with the possibility of a fixed rotation. ////// P Figure 1 1R35488 15 ° 4 M eleven 6-5 17,. sixteen .h G // U // // A L u FIG. 2 FIG. FIG. 6 (position I) FIG. 7 (position 3)  / yg FIG. 5 (position)  0-center of mass 1-1, I-M-axis K of the smallest pg w / ys x / Lj Designation z8ena rkuliroba Fig .8 (position) neither Fig. 91yuAachete5)