Flexible testing device for hemispherical resonator gyroscope
By designing a flexible connecting section combined with the test base, and optimizing the stiffness to isolate the vibration of the resonator from the base, the problem of the test accuracy of the hemispherical resonator gyroscope being affected by the external environment was solved, achieving higher test accuracy and stability.
Patent Information
- Application Number
- CN202511413576.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-01-23
AI Technical Summary
In existing technologies, during the testing process of hemispherical resonator gyroscopes, the unbalanced inertial force caused by defects in the mass distribution of the resonator is transmitted to the mounting interface, resulting in the dissipation of vibration energy and affecting accuracy. External environmental vibrations and stress interference also affect the testing accuracy.
Design a flexible testing device for a hemispherical resonator gyroscope. The device uses a test base and a flexible connecting section. The gyroscope mounting surface is connected to the base by evenly distributed connecting columns. The stiffness is optimized to isolate the structural vibration of the resonator and the base in the working frequency band, avoid the working frequency of the resonator, and reduce the influence of the external environment.
It effectively isolates the vibration energy transfer between the resonator and the base, improves the test accuracy and stability, and reduces the impact of the external environment on the gyroscope.
Smart Images
Figure CN121384084A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a kind of flexible test device of hemispherical resonator gyroscopes, belong to the field of hemispherical resonator gyroscopes test device design. BACKGROUND
[0002] Hemispherical resonator gyro is a kind of solid wave gyroscope based on coriolis effect, when working, harmonic oscillator is in four wave abdomen standing wave vibration state, when gyro has input angular velocity, standing wave abdomen advances along the circumferential direction of harmonic oscillator under the action of coriolis force, and the measurement of angular velocity is realized by detecting the size of wave abdomen advance.It is widely used in aviation, aerospace, strategic navigation and many other fields with simple structure, high precision and good reliability.
[0003] Hemispherical resonator gyro works when harmonic oscillator is in four wave abdomen standing wave vibration state, when gyro has input angular velocity, standing wave abdomen advances along the circumferential direction of harmonic oscillator under the action of coriolis force, and the measurement of angular velocity is realized by detecting the size of wave abdomen advance.Hemispherical resonator spherical shell usually exists in actual manufacturing process Micro mass distribution defect, when harmonic oscillator spherical shell carries out standing wave vibration, it will produce unbalanced inertia force of same frequency, cause vibration energy to transfer dissipation to other structural parts, make quality factor be easily affected by structural stress.
[0004] When hemispherical resonator gyro is tested, in order to ensure the stability of sensitive axis direction, rigid tooling is usually used for installation and fixation.In actual test, on the one hand, unbalanced inertia force produced by mass distribution defect of harmonic oscillator will be transmitted to the installation interface of gyro and test device, so that harmonic oscillator vibration energy dissipation is affected by gyro installation stress, resulting in the decline of gyro precision;On the other hand, the mechanical disturbance such as vibration, impact and stress of test device base will be transmitted to gyro structure, further affecting the precision of gyro. SUMMARY
[0005] The technical problem solved by the present application is: in view of the deficiencies of the prior art, a kind of flexible test device of hemispherical resonator gyro is provided, which isolates the structure vibration of working frequency band between hemispherical resonator gyro and base, and reduces the influence of external environment on test precision.
[0006] The technical solution of the present application is: a kind of flexible test device of hemispherical resonator gyro, including test base, flexible connecting section;
[0007] The test base is cylindrical structure;Flexible connecting section is installed on the test base;The flexible connecting section includes connecting column, gyro mounting surface and base, the upper surface of flexible connecting section is gyro mounting surface, and the base is connected with gyro mounting surface through connecting column which is uniformly distributed along the circumference.
[0008] Further, the thickness of the bottom and sidewall of the test base is greater than 10mm, and the flatness of the bottom surface and top surface is less than 0.01mm.
[0009] Furthermore, the flatness of the mounting surface where the flexible connecting section connects to the test base is less than 0.01 mm.
[0010] Furthermore, the flatness of the gyroscope mounting surface is less than 0.01 mm.
[0011] Furthermore, the cross-sectional shape of the connecting columns can be circular, rectangular, or sector-shaped, and the number can be no more than 4.
[0012] Furthermore, in the design of the dimensions of the connecting column, the structural modes and harmonic responses are analyzed, and the stiffness of the flexible connecting section is optimized according to the gyroscope structure and the operating frequency of the resonator. It is required that the natural frequencies of the test base and the flexible connecting section avoid the operating frequency of the resonator, and that the first natural frequency of the test base and the flexible connecting section is greater than the bandwidth of the gyroscope.
[0013] Furthermore, the flexible connecting segment can be used independently.
[0014] Furthermore, the flexible connecting section and the test base can be manufactured as a single piece.
[0015] The advantages of this invention compared to the prior art are:
[0016] 1. This invention employs a simple structure to effectively isolate the outward transmission of resonator vibration, solving the problem that the quality factor of a hemispherical resonator gyroscope is easily affected by the external environment; it achieves the isolation of the operating frequency band structural vibration between the resonator head and the base using a simple structure, reducing the impact of the external environment on the test accuracy.
[0017] 2. By adding a flexible element to the structure and optimizing the stiffness by combining the gyroscope structure with the operating frequency of the resonator, this invention effectively isolates the influence of external vibration, impact, and stress on the gyroscope structure, thereby improving the testing accuracy and stability of the hemispherical resonator gyroscope. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the flexible testing device for the hemispherical resonator gyroscope of the present invention.
[0019] Figure 2 This is a schematic diagram of the flexible connecting segment of the present invention. Detailed Implementation
[0020] The present invention will be described in conjunction with the accompanying drawings.
[0021] A flexible testing device for a hemispherical resonator gyroscope, such as Figure 1 As shown, it consists of a test base 11 and a flexible connecting section 12, with the gyroscope mounting surface 13 on the upper part of the flexible connecting section 12.
[0022] likeFigure 1 As shown, the test base 11 is the main structure of the hemispherical resonator gyroscope testing device. To ensure rigidity and stability, a cylindrical structure is adopted, with the bottom and side wall thickness typically greater than 10mm, and the flatness of the bottom and top surfaces typically less than 0.01mm, in order to achieve stable installation on the test reference platform.
[0023] like Figure 1 As shown, the flexible connecting section 12 is installed on the test base 11. The flatness of the mounting surfaces of the flexible connecting section 12 and the test base 11 is usually less than 0.01mm, and they are fastened by screws or other means.
[0024] like Figure 1 As shown, the upper surface of the flexible connecting section 12 is the gyroscope mounting surface 13, and the flatness usually needs to be less than 0.01mm. The gyroscope is usually fastened with screws.
[0025] like Figure 2 As shown, the flexible connecting section 12 uses connecting columns 21 evenly distributed along the circumference to achieve a low-stiffness connection between the test base 11 and the gyroscope mounting surface 13. The cross-sectional shape of the connecting columns 21 can be circular, rectangular, fan-shaped, etc., and the number must not be less than 4 to avoid coupling interference with the four-wave antinode vibration of the harmonic oscillator.
[0026] like Figure 2 As shown, the flexible connecting section 12 includes a connecting column 21, a gyroscope mounting surface 13, and a base 22. The base 22 and the gyroscope mounting surface 13 are connected by connecting columns 21 that are evenly distributed along the circumference. The gyroscope mounting surface 13 and the base 22 need to have high rigidity to avoid the stress affecting the flatness of the connecting column 21 when it deforms.
[0027] like Figure 2 As shown, the cross-sectional shape of the connecting column 21 can be circular, rectangular, or fan-shaped. The design of the connecting column dimensions requires structural modal and harmonic response analysis, and the stiffness of the flexible connecting section needs to be optimized in conjunction with the gyroscope structure and the resonator's operating frequency. It is required that the natural frequencies of the test base 11 and the flexible connecting section 12 avoid the resonator's operating frequency, thereby isolating the resonator head from structural vibrations in the operating frequency band between the base and the resonator, reducing the impact of the external environment on test accuracy. Simultaneously, it is required that the first-order natural frequencies of the test base 11 and the flexible connecting section 12 be greater than the gyroscope bandwidth to prevent the gyroscope from being sensitive to the swaying of the flexible section, thus avoiding gyroscope noise and errors.
[0028] The flexible connecting section 12 can be used alone, for example, installed on the base of the inertial navigation system to achieve vibration isolation between the gyroscope and the inertial navigation system.
[0029] The flexible connecting section 12 and the test base 11 can also be integrally manufactured, and the installation process between the two is omitted.
[0030] The test base is designed with high rigidity, and the bottom surface has high flatness requirement, so as to realize stable installation on the test table. The flexible connecting section is installed on the test base, and is designed with long column structure distributed along the circumference, so as to realize low rigidity connection between the upper and lower surfaces of the flexible connecting section. The gyro mounting surface part has high flatness requirement, so as to ensure stable installation of the gyro. The part is designed with high rigidity, so as to effectively avoid the influence of the deformation stress of the flexible section on the flatness. In the device design, the structure modal and harmonic response analysis are carried out, and the rigidity of the flexible connecting section is optimized in combination with the gyro structure and the working frequency of the harmonic oscillator, so that the natural frequency of each order of the overall structure avoids the working frequency of the harmonic oscillator, so as to realize the isolation of the working frequency band structure vibration between the harmonic oscillator and the base, and reduce the influence of the external environment on the test precision.
[0031] The part of the present application not described in detail belongs to the common knowledge of the person skilled in the art. The specific embodiments described are only examples of the spirit of the present application. The person skilled in the art can make different modifications or supplements to the specific embodiments described or adopt similar ways instead, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.
Claims
1. A flexible testing device for a hemispherical resonator gyroscope, characterized in that, Includes a test base (11) and a flexible connecting section (12); The test base (11) is a cylindrical structure; the flexible connecting section (12) is installed on the test base (11); the flexible connecting section (12) includes a connecting column (21), a gyroscope mounting surface (13) and a base (22), the upper surface of the flexible connecting section (12) is the gyroscope mounting surface (13), and the base (22) and the gyroscope mounting surface (13) are connected by connecting columns (21) evenly distributed along the circumference.
2. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that, The thickness of the bottom and side walls of the test base (11) is greater than 10mm.
3. The flexible testing device for a hemispherical resonator gyroscope according to claim 2, characterized in that, The flatness of the bottom and top surfaces of the test base (11) is less than 0.01 mm.
4. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that: The flatness of the mounting surface where the flexible connecting section (12) connects to the test base (11) is less than 0.01 mm.
5. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that: The flatness of the mounting surface (13) of the gyroscope is less than 0.01 mm.
6. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that: The cross-sectional shape of the connecting column (21) is circular, rectangular or fan-shaped, and the number is not equal to 4.
7. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that: In the size design of the connecting column (21), the structural modes and harmonic responses are analyzed, and the stiffness of the flexible connecting section (12) is optimized according to the gyroscope structure and the working frequency of the resonator. It is required that the natural frequencies of the test base (11) and the flexible connecting section (12) avoid the working frequency of the resonator, and the first natural frequency of the test base (11) and the flexible connecting section (12) is greater than the bandwidth of the gyroscope.
8. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that: The flexible connecting segment (12) can be used alone.
9. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that: The flexible connecting section (12) and the test base (11) can be manufactured as a single piece.
10. The flexible testing device for a hemispherical resonator gyroscope according to claim 1, characterized in that: The gyroscope is fixed to the gyroscope mounting surface (13) with screws.