CN112539766B - Device and method for testing perpendicularity error of rotation axis of single-axis rate gyroscope rotary table - Google Patents
Device and method for testing perpendicularity error of rotation axis of single-axis rate gyroscope rotary table Download PDFInfo
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- CN112539766B CN112539766B CN202011401068.2A CN202011401068A CN112539766B CN 112539766 B CN112539766 B CN 112539766B CN 202011401068 A CN202011401068 A CN 202011401068A CN 112539766 B CN112539766 B CN 112539766B
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- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
- G01C25/005—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices
Abstract
A device and a method for testing the perpendicularity error of the rotating axis of a single-axis rate gyro rotating table are used for carrying out development analysis on a testing system of the high-precision perpendicularity error of the single-axis rate gyro rotating table and completing the measurement process of the testing system. According to the invention, a verticality error calculation formula is formed by a Fourier series principle, an average value principle and an error compensation method, and the verticality error of the single-axis rate gyro rotary table is tested by adopting the rotary table tool, so that the high-precision verticality errors of all the single-axis rate gyro rotary tables can be tested, the measuring time is shortened, and the measuring efficiency is improved.
Description
Technical Field
The invention relates to a device and a method for testing the verticality error of the rotary axis of a single-axis rate gyro rotary table, which are used for developing and analyzing a testing system of the high-precision verticality error of the single-axis rate gyro rotary table and completing the measurement process of the testing system.
Background
The uniaxial rate gyroscope rotary table is an important key product of an aerospace system, the requirement on the parameters of a test system is more, no clear technical method for detecting the uniaxial perpendicularity error technical index exists at home and abroad, and in the main performance test method of GJB1801-1993 inertia technical test equipment, no uniaxial rotary table perpendicularity test method exists, and only a biaxial rotary table test method is related. Particularly, for the measurement of the perpendicularity error, no detection means is provided at home for the measurement within 20 ″, but the accuracy of the perpendicularity error required by a rate gyro turntable is continuously improved from the earliest 30 ″, to the current 20 ″, and the requirement of the inclination angle rotation error of a rotary table is met mainly through the improvement of the accuracy, so that the requirement of comprehensive technical indexes is met.
Disclosure of Invention
The technical problem solved by the invention is as follows: the device and the method for testing the verticality error of the rotary axis of the single-axis rate gyro rotary table overcome the defects of the prior art, provide a solution for solving the verticality error of the rotary table in 20 'on the basis that the verticality error of the original rotary table cannot be quantified in 20' and the test cannot be carried out, and design a set of test auxiliary safety testing device for ensuring the safety in the testing process.
The technical solution of the invention is as follows: the device for testing the perpendicularity error of the rotation axis of the single-axis rate gyro turntable comprises a turntable tool and an electronic level meter; a uniaxial rate gyro revolving platform to be detected is placed on the revolving table tool, and an electronic level meter is placed on the uniaxial rate gyro revolving platform;
the turntable tool comprises a fixing screw, a base, a height adjusting seat, a height adjusting structural part, an angular contact bearing and a supporting table; the height adjusting seat is of a hollow cylinder structure; the bottom of the height adjusting seat is fixedly arranged on the base through a fixing screw; the inner side of the height adjusting seat is provided with threads which are matched with the external threads of the column body at the bottom of the height adjusting structural part to realize the lifting of the height adjusting structural part relative to the height adjusting seat; the angular contact bearing outer ring is fixedly connected with the height adjusting structural part in an interference fit mode, the supporting table is fixedly connected with the inner ring through screws in an interference fit mode, the angular contact bearing inner ring is higher than the angular contact bearing outer ring, and the supporting table can freely rotate relative to the height adjusting structural part.
Further, the interference dimension of the interference fit is 0.015mm.
The method for testing the verticality error of the rotary axis of the single-axis rate gyro rotary table, which is realized according to the device for testing the verticality error of the rotary axis of the single-axis rate gyro rotary table, comprises the following steps:
firstly, preparing a marble platform, three centers, a turntable tool, a lever dial indicator, a magnetic gauge stand and an electronic level meter;
secondly, placing the rotary table tool and the three apexes on a marble platform, and placing the three apexes around the rotary table tool at an angle of 120 degrees;
thirdly, placing the single-axis rate gyro rotary table to be measured on a support table of the rotary table tool, adjusting a height adjusting structural part of the rotary table tool to enable the bottom of the single-axis rate gyro rotary table to be measured to contact three apexes, and enabling one of the apexes to be aligned to a 0-degree point of the single-axis rate gyro rotary table to be measured;
fourthly, mounting a lever dial indicator on a magnetic gauge stand; the extension line of the measuring rod of the lever dial indicator passes through the center of the single-axis rate gyro revolving platform to be measured, and the measuring head of the lever dial indicator is placed at the edge of the single-axis rate gyro revolving platform to be measured; locking the magnetic gauge stand, loosening the locking device of the uniaxial rate gyro rotary table to be tested, rotating at least three circles of uniaxial rate gyro rotary tables to be tested in time, and reading the maximum difference value of the lever dial indicator; if the maximum difference value meets the preset condition, continuing the next step; otherwise, judging that the uniaxial rate gyroscope rotary table to be tested is unqualified, and ending the test;
fifthly, locking the uniaxial rate gyro rotary table to be tested, respectively aligning pi grooves of the electronic level meter to the longitudinal direction of 0-180 degrees and the transverse direction of 90-90 degrees, drawing four mutually vertical lines at intervals in the longitudinal direction and four transverse lines at intervals by taking the electronic level meter as a scale, and aligning pi grooves of the electronic level meter to the transverse direction of 90-90 degrees;
sixthly, aligning the electronic level meter to four vertical lines which are vertical to each other in the transverse direction and four vertical lines which are vertical to each other in the longitudinal direction in sequence, and repeatedly adjusting the single-axis rate gyro rotary table to be measured until the precision range of the single-axis rate gyro rotary table to be measured is horizontal and horizontal in the longitudinal direction, wherein the horizontal and vertical horizontal ranges are 0.001 mm/m;
seventhly, aligning the measuring direction of the electronic level meter to four vertical lines at intervals and four horizontal lines at intervals in sequence, and measuring the longitudinal horizontal angle value r of the uniaxial rate gyro revolving platform to be measured at intervals of 10 degrees Longitudinal direction (θ i ) And the value r of the horizontal angle line Horizontal bar (θ i )，i＝0,1，2…35；
The eighth step of passing r Longitudinal direction (θ i ) And r Horizontal bar (θ i ) Calculating the verticality H of the 0-degree point alignment uniaxial rate gyro rotary table to be measured 0 And completing the test.
Further, the division value of the lever dial indicator is 0.01mm.
Further, the verticality is
Further, the accuracy of the electronic level is not lower than 0.001mm/m.
Compared with the prior art, the invention has the advantages that:
(1) According to the method, a verticality error calculation formula is formed through a Fourier series principle, an average value principle and an error compensation method, and the verticality error of the single-axis rate gyro rotary table is tested by adopting the rotary table tool, so that the high-precision verticality errors of all the single-axis rate gyro rotary tables can be tested, the measuring time is shortened, and the measuring efficiency is improved.
(2) And forming a verticality error calculation formula according to a Fourier series principle, an average value principle and an error compensation method.
(3) The three centers matched with the rotary table tool for use fine threads, so that the difficulty in the adjusting process is reduced, and the efficiency is improved.
(3) The rotary table tool can stably support the rotary table at an approximate elevating position and can be adjusted up and down, and the tool base is provided with a tip placing position, so that the tip can be placed in position quickly. In addition, the center is designed into fine threads, and the rotating adjusting diameter is increased, so that the horizontal adjusting process is quicker and more accurate.
(4) The tool supporting structure comprises a supporting table, a bearing, a height adjusting structural part, a height adjusting seat, a base and the like. Wherein the plane degree of base bottom surface can ensure frock and platform stationary contact, through the screw thread adjustment frock height on the regulating structure spare, provides rotatory degree of freedom by the bearing, and the revolving stage does not follow its rotation when making the frock go up and down.
(5) The tool has the advantage that the bearing provides a degree of freedom for preventing the rotary table from rotating when the rotary table is lifted. The surface heat treatment of the tool can provide enough strength to ensure the stability of the test process. In addition, the supporting center adopts nonstandard fine thread, so that the precision of the horizontal adjustment process can be improved to 0.002mm/m from 0.004mm/m, and the efficiency of single adjustment is improved accordingly.
(6) The bottom of the rotary table is attached to a tool supporting table surface, the rotary table is elevated by adjusting the table surface, and the rotary table is adjusted to be horizontal by adjusting the center. Because the position of the rotary table contacted by the tip is relatively narrow, the rotary table is easy to slide when the test is carried out by the original test method. The supporting structure not only can replace manpower to elevate the rotary table, but also provides guarantee for the safety of the test.
Drawings
FIG. 1 is a schematic structural diagram of a device for testing the perpendicularity error of the rotation axis of a single-axis rate gyroscope rotary table according to the invention;
in the figure, 1-a fixing screw, 2-a base, 3-a height adjusting seat, 4-a height adjusting structural part, 5-an angular contact bearing and 6-a supporting platform;
FIG. 2 is a flow chart of the method for testing the perpendicularity error of the axis of rotation of the single-axis rate gyro turntable.
Detailed Description
In order to better understand the technical solutions, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
The following describes in further detail the apparatus and method for testing perpendicularity error of rotation axis of a single-axis rate gyro turret provided in the embodiments of the present application with reference to the drawings (as shown in fig. 1 and 2).
In the scheme provided by the embodiment of the application, the device for testing the perpendicularity error of the rotary axis of the single-axis rate gyro rotary table comprises a rotary table tool and an electronic level meter; placing a uniaxial rate gyro rotary table to be tested on a rotary table tool, and placing an electronic level meter on the uniaxial rate gyro rotary table; the turntable tool comprises a fixing screw 1, a base 2, a height adjusting seat 3, a height adjusting structural part 4, an angular contact bearing 5 and a supporting table 6; the height adjusting seat 3 is of a hollow cylinder structure; the bottom of the height adjusting seat 3 is fixedly arranged on the base 2 through a fixing screw 1; the inner side of the height adjusting seat 3 is provided with threads which are matched with the external threads of the column at the bottom of the height adjusting structural part 4 to realize the lifting of the height adjusting structural part 4 relative to the height adjusting seat 3; 5 outer lane of angular contact bearing and height adjustment structure 4 fixed connection and interference fit, brace table 6 passes through screw and inner circle fixed connection and interference fit, and 5 inner circles of angular contact bearing are higher than 5 outer lanes of angular contact bearing, realize 6 relative height adjustment structure 4 free rotations of brace table. The interference dimension of the interference fit is 0.015mm.
The invention also provides a device for testing the verticality error of the rotary axis of the rotary table based on the uniaxial rate gyroscope, which comprises the following steps:
1 appearance and interaction of parts
The lever dial indicator is erected on the magnetic gauge seat, the lever dial indicator is adjusted on the table top of the uniaxial rate gyro revolving platform to be detected, at least four sections in the radial direction of the uniaxial rate gyro revolving platform to be detected are used for upwards lifting the table top of the uniaxial rate gyro revolving platform to be detected or downwards pressing the table top of the uniaxial rate gyro revolving platform to be detected, and the variation is less than or equal to 0.030mm.
2 function of each part
1) The electronic level meter is placed on the table top of the uniaxial rate gyroscope rotary table to be tested, four metal corners on the bottom surface of the electronic level meter are held by hands on any four planes, and the electronic level meter is lifted up and down without obvious change.
2) Locking device
And aligning to a 180-degree point, and plugging and pulling the locking device to ensure whether the single-axis rate gyro rotary table to be tested is locked and loosened.
3 maximum variable quantity of platform surface of uniaxial rate gyro revolving platform to be measured
The maximum and minimum variable quantities of the table top of the uniaxial rate gyroscope rotary table to be tested are called as the maximum verticality value of the table top of the uniaxial rate gyroscope rotary table to be tested. Three tops which are 120 degrees in each other are placed on a marble platform, a single-axis rate gyro revolving platform to be measured is placed on a supporting table 6 of a rotary table tool, a height adjusting structural part 4 of the rotary table tool is adjusted, the bottom of the single-axis rate gyro revolving platform to be measured is in contact with the three tops, one of the tops is aligned to a 0-degree point of the single-axis rate gyro revolving platform to be measured, an electronic level meter is used for rotating at least three circles of the single-axis rate gyro revolving platform to be measured to level on two planes which are perpendicular to the table surface of the single-axis rate gyro revolving platform to be measured in time, a lever percentage meter is placed beyond the radius of the single-axis rate gyro revolving platform to be measured, and the maximum value of verticality caused by the table surface of the single-axis rate gyro revolving platform to be measured is measured and recorded at a point where a measuring rod extension line of the lever percentage meter passes through the center of the single-axis rate gyro revolving platform to be measured.
4 line drawing
The center of an n-shaped groove of the electronic level meter is aligned to 0 degree and 180 degrees of the rotary table, so that the gravity center of the electronic level meter is positioned at the center of the table top of the uniaxial rate gyroscope rotary table to be measured. Two lines are drawn by using the transverse and longitudinal ends of the electronic level as scales. The center of the pi groove of the electronic level is aligned with a clockwise 90-degree point and a counterclockwise 90-degree point of the rotary table, so that the gravity center of the electronic level is positioned at the center of the table top, and two lines are drawn by taking the transverse direction and the longitudinal direction of the electronic level as a ruler.
5 set up the electronic spirit level
The electronic level was set at 0.001mm/m. Namely "RANGE II".
6 adjusting the level of the table top of the uniaxial rate gyro revolving platform to be measured
1) And unlocking the uniaxial rate gyro turntable to be detected.
2) Firstly, the transverse level of the uniaxial rate gyroscope rotary table to be measured is adjusted, namely, the electronic level meter is aligned to clockwise and anticlockwise 90 degrees points, the electronic level meter is continuously turned for 180 degrees, and three apexes are adjusted to enable two ends of the electronic level meter to be horizontal.
3) And then adjusting the longitudinal level of the single-axis rate gyro turntable to be measured, namely aligning the electronic level meter to the 0-degree point and the 180-degree point, continuously turning the electronic level meter for 180 degrees, and adjusting the three apexes to enable the two ends of the three apexes to be level.
4) And continuously exchanging and adjusting the horizontal and vertical levels of the single-axis rate gyro rotary table to be measured to enable the horizontal and vertical levels to reach respective levels, wherein the respective difference value of the horizontal and vertical levels cannot exceed 0.002mm/m.
7 measured data processing and 0-degree point verticality measuring result of to-be-measured single-axis rate gyro rotary table
1) And (4) placing the electronic level meter.
Firstly measuring the longitudinal horizontal values of the single-axis rate gyro revolving platform to be measured, namely aligning the electronic level instrument to the 0-degree point and the 180-degree point, and secondly measuring the transverse horizontal values of the single-axis rate gyro revolving platform to be measured, namely aligning the electronic level instrument to the clockwise 90-degree point and the anticlockwise 90-degree point.
2) And measuring the horizontal quantity value, namely measuring the verticality error.
Every 10 degrees, 36 points are measured horizontally and longitudinally, the magnitude of the horizontal and longitudinal measuring points is completely corresponding to the measuring points of the rotary table, namely the magnitude of each measuring point comprises two magnitudes measured horizontally and longitudinally, the longitudinal magnitude is called r longitudinal (theta i), the transverse magnitude is called r transverse (theta i), i =0.1, …, theta i =2 pi/N, and N =36.
c) Substituting data of r longitudinal (theta i) and r transverse (theta i) into a verticality formula
And acquiring a verticality error.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (6)
1. Device for testing perpendicularity error of rotary axis of single-axis rate gyro rotary table, characterized in that: the device comprises a turntable tool and an electronic level meter; placing a uniaxial rate gyro rotary table to be tested on a rotary table tool, and placing an electronic level meter on the uniaxial rate gyro rotary table;
the turntable tool comprises a fixing screw (1), a base (2), a height adjusting seat (3), a height adjusting structural part (4), an angular contact bearing (5) and a supporting table (6); the height adjusting seat (3) is of a hollow cylinder structure; the bottom of the height adjusting seat (3) is fixedly arranged on the base (2) through a fixing screw (1); the inner side of the height adjusting seat (3) is provided with threads which are matched with the external threads of the column body at the bottom of the height adjusting structural part (4) to realize the lifting of the height adjusting structural part (4) relative to the height adjusting seat (3); the outer ring of the angular contact bearing (5) is fixedly connected with the height adjusting structural part (4) in an interference fit mode, the supporting table (6) is fixedly connected with the inner ring through screws in an interference fit mode, the inner ring of the angular contact bearing (5) is higher than the outer ring of the angular contact bearing (5), and the supporting table (6) can rotate freely relative to the height adjusting structural part (4).
2. The apparatus of claim 1 for testing the verticality error of the axis of rotation of a single-axis rate-gyro turret, wherein: the interference dimension of the interference fit is 0.015mm.
3. The method for testing the perpendicularity error of the rotary axis of the single-axis rate gyro rotary table, which is realized by the device for testing the perpendicularity error of the rotary axis of the single-axis rate gyro rotary table according to claim 1, is characterized by comprising the following steps of:
firstly, preparing a marble platform, three centers, a turntable tool, a lever dial indicator, a magnetic gauge stand and an electronic level meter;
secondly, placing the rotary table tool and the three apexes on a marble platform, and placing the three apexes around the rotary table tool at an angle of 120 degrees;
thirdly, placing the single-axis rate gyro rotary table to be measured on a support table (6) of the rotary table tool, and adjusting a height adjusting structural part (4) of the rotary table tool to enable the bottom of the single-axis rate gyro rotary table to be measured to contact three apexes, and enabling one of the apexes to be aligned to a 0-degree point of the single-axis rate gyro rotary table to be measured;
fourthly, mounting a lever dial indicator on a magnetic gauge stand; an extension line of a measuring rod of the lever dial indicator passes through the center of the single-axis rate gyro rotary table to be measured, and a measuring head of the lever dial indicator is placed at the edge of the single-axis rate gyro rotary table to be measured; locking the magnetic gauge stand, loosening the locking device of the uniaxial rate gyro rotary table to be tested, rotating at least three circles of uniaxial rate gyro rotary tables to be tested in time, and reading the maximum difference value of the lever dial indicator; if the maximum difference value meets the preset condition, continuing the next step; otherwise, judging that the uniaxial rate gyro rotary table to be tested is unqualified, and ending the test;
fifthly, locking the uniaxial rate gyro rotary table to be tested, respectively aligning pi grooves of the electronic level meter to the longitudinal direction of 0-180 degrees and the transverse direction of 90-90 degrees, drawing four mutually vertical lines at intervals in the longitudinal direction and four transverse lines at intervals by taking the electronic level meter as a scale, and aligning pi grooves of the electronic level meter to the transverse direction of 90-90 degrees;
sixthly, aligning the electronic level meter to four vertical lines which are vertical to each other in the transverse direction and four vertical lines which are vertical to each other in the longitudinal direction in sequence, and repeatedly adjusting the single-axis rate gyro rotary table to be measured until the precision range of the single-axis rate gyro rotary table to be measured is horizontal and horizontal in the longitudinal direction, wherein the horizontal and vertical horizontal ranges are 0.001 mm/m;
seventhly, aligning the measuring direction of the electronic level meter to four vertical lines at intervals and four horizontal lines at intervals in sequence, and measuring the longitudinal horizontal angle value r of the uniaxial rate gyro revolving platform to be measured at intervals of 10 degrees Longitudinal direction (θ i ) And the value r of the horizontal angle line Horizontal bar (θ i )，i＝0,1，2…35；
The eighth step of passing Longitudinal direction (θ i ) And r Cross bar (θ i ) Calculating the 0-degree point alignment uniaxial velocity to be measuredVerticality H of gyro rotary table 0 And completing the test.
4. The method of claim 3 for testing the perpendicularity error of the axis of rotation of the single-axis rate gyro turret, wherein the method comprises the steps of: the division value of the lever dial indicator is 0.01mm.
5. The method of claim 3 for testing the perpendicularity error of the axis of rotation of the single-axis rate gyro turret, wherein the method comprises the steps of: the verticality is
6. The method of claim 3 for testing the perpendicularity error of the axis of rotation of the single-axis rate gyro turret, wherein the method comprises the steps of: the precision of the electronic level meter is not less than 0.001mm/m.
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| CN202011401068.2A CN112539766B (en) | 2020-12-02 | 2020-12-02 | Device and method for testing perpendicularity error of rotation axis of single-axis rate gyroscope rotary table |
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