Solid fluctuation localization inertial navigation gyroscope capable of suppressing defects and method

Abstract

The invention discloses a solid fluctuation localization inertial navigation gyroscope capable of inhibiting defects. The solid fluctuation localization inertial navigation gyroscope comprises a gyroscope base, piezoelectric electrodes, a circuit board, a sealing cover, a cylindrical harmonic oscillator, a top cover, a supporting structure and a transmission structure, the cylindrical harmonic oscillator is installed above the circular truncated cone through a supporting structure and a transmission structure. The top cover is arranged at the upper end of the cylindrical harmonic oscillator; the cylindrical harmonic oscillator comprises a resonance ring and a rib ring assembly, the resonance ring is a cylinder, a through hole is formed in the middle of the resonance ring, and internal threads are arranged at the upper end and the lower end of the through hole and used for being detachably connected with the top cover and the transmission structure; the rib ring assembly is of a cylindrical shell structure with a circular groove and is connected to the top of the resonance ring in a sleeving mode through the circular groove, annular ribs are periodically arranged on the outer wall of the rib ring assembly, and the annular ribs are symmetrically distributed from the middle of the resonance ring to the two sides of the resonance ring. The resonance ring on the inner side is used for rotating and vibrating and compensating mass distribution, and the rib ring assembly on the outer side is used for restraining working mode phase deviation and characteristic frequency splitting decomposition caused by mass concentration.

Description

Technical Field

[0001] This invention relates to the field of wave gyroscope technology, and in particular to a cylindrical solid wave localization navigation gyroscope and method with the function of suppressing internal defects. Background Technology

[0002] Cylindrical gyroscopes, a common type of axial gyroscope, offer advantages such as moderate size, low production cost, and long service life. Due to their precession characteristic during high-speed rotation, they are often used as core sensing devices in inertial navigation systems to accurately measure the angular velocity and angular displacement of a vehicle, playing an indispensable role in correcting the vehicle's attitude and calibrating its heading. Therefore, their key performance directly determines the accuracy and reliability of the inertial navigation system.

[0003] Currently, among existing axis-type gyroscopes, cylindrical gyroscopes are widely used in most high-precision applications due to their relatively high accuracy. However, their large internal resonator volume (typically between 50mm and 90mm in diameter) and stringent environmental requirements (stability decreases outside the -20℃ to 60℃ range) make them unsuitable for lightweight and miniaturized applications such as small drones and portable navigation devices. Furthermore, during manufacturing, these gyroscopes are prone to hidden defects due to uneven material stress and assembly errors, significantly increasing production costs. Therefore, reducing gyroscope size for lightweight applications, improving manufacturing methods to mitigate the impact of hidden defects on performance (thus reducing costs), and simultaneously improving gyroscope accuracy and stability have become crucial issues that urgently need to be addressed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and solve the above-mentioned problems of existing navigation gyroscopes in terms of size and manufacturing methods. It provides a solid-state wave localization inertial navigation gyroscope and method for suppressing defects, so as to reduce the impact of defects occurring in the manufacturing process of inertial navigation gyroscopes on cylindrical gyroscopes, thereby improving the stability and accuracy of such gyroscopes while reducing production costs.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A solid-state wave localization inertial navigation gyroscope for suppressing defects includes a gyroscope base, piezoelectric electrodes, a circuit board, and a sealing cover; the upper surface of the gyroscope base is provided with a frustum and communicates with the bottom groove through a connecting hole, and the gyroscope base is uniformly provided with fixing holes for connecting to a mounting platform around the frustum.

[0007] It also includes a cylindrical resonator, a top cover, a support structure, and a transmission structure; the cylindrical resonator is mounted on top of a frustum via the support structure and the transmission structure; the circuit board is fixed on the upper surface of the frustum, the piezoelectric electrodes are arranged in a regular octagon at the bottom of the cylindrical resonator, and the lower surface of the piezoelectric electrodes is connected to the circuit board via leads; the sealing cover is threadedly engaged with the gyroscope base to form a sealed space; the top cover is located at the upper end of the cylindrical resonator;

[0008] The cylindrical resonator includes a resonant ring and a rib ring assembly. The resonant ring is a cylinder with a through hole in the middle. The upper and lower ends of the through hole are provided with internal threads for detachable connection with the top cover and the transmission structure.

[0009] The rib ring assembly is a cylindrical shell structure with a circular groove, which is sleeved on the top of the resonant ring through the circular groove. The outer wall of the rib ring assembly is periodically provided with annular ribs, which are symmetrically distributed from the middle of the resonant ring to both sides.

[0010] The inner resonant ring is used for rotation and vibration to compensate for the mass distribution, while the outer rib ring assembly is used to suppress the phase shift of the working mode and the fragmentation of the characteristic frequency caused by the concentrated mass.

[0011] Furthermore, the annular ribs are provided in eight parts, with a rib height of 1.5 mm, a rib width of 0.5 mm, and a spacing error of less than 0.05 mm between adjacent annular ribs.

[0012] Furthermore, the resonant ring and rib ring assembly are made of fused silica; the gyroscope base is made of metal, and the sealing cover is made of aluminum alloy or titanium alloy with an anti-reflective coating on the inner wall.

[0013] Furthermore, the top cover is composed of a cover plate, a boss, and a connecting post. The boss is located in the middle of the upper surface of the cover plate, and the connecting post is provided with an external thread for engaging with the internal thread of the resonant ring. After assembly, the top cover further suppresses the phase shift of the working mode. The coaxiality error of the boss and the connecting post is ≤0.01 mm, and the fitting gap between the top cover and the cylindrical resonator is 0.02–0.05 mm.

[0014] Furthermore, the transmission structure is a column with an external thread at the top for engaging with the internal thread of the resonant ring, and a baffle at the bottom. The top of the transmission structure passes through the connecting hole on the gyroscope base and connects to the resonant ring. The support structure is a hollow column fitted onto the transmission structure. The support structure is a hollow column with a wall thickness of 1.5 mm and an internal thread pitch of 0.5–1 mm, and an annular sealing gasket is provided on the connection surface with the frustum.

[0015] Furthermore, the sealing cover adopts a hollow cylindrical structure with an opening at the bottom. The sealed space formed by the sealing cover and the gyroscope base is used to prevent the working mode of the cylindrical resonator from being affected by the external environment.

[0016] Furthermore, the diameter of the cylinder of the transmission structure is 4 mm and the external thread angle is 60°.

[0017] Furthermore, the circuit board is connected to an external circuit via a through-hole in the frustum and connecting wires.

[0018] Furthermore, the annular rib and the resonant ring are machined in the same clamping and finishing process in one step to reduce the shape and position errors caused by tool deflection in thin-walled parts.

[0019] Preferably, the present invention also provides a manufacturing method for the solid-state wave localization inertial navigation gyroscope, comprising: reserving a machining allowance of 0.8-3 mm on the outer surface of the resonant ring; using a synchronous support fixture on the inner and outer surfaces to suppress thin-wall vibration, and simultaneously finishing the resonant ring and rib ring assembly in the same clamp; and after assembly, finely adjusting the coaxiality by threaded engagement between the top cover and the transmission structure to reduce offset and characteristic frequency fragmentation caused by machining and assembly defects.

[0020] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0021] 1. This invention features a clear division of functions: the inner resonant ring is responsible for vibration and mass compensation, while the outer rib ring assembly is responsible for circumferential stiffness shaping. Mass compensation and stiffness homogenization / suppression are separated and optimized independently, resulting in low coupling and well-defined adjustment boundaries. This solves the problem in integrated structures where mass and stiffness adjustments are interdependent, making it difficult to control frequency difference and phase stability due to the interconnectedness of adjustments in one area. Furthermore, compared to integrated structures, the number of convergence steps for adjusting modal frequency difference and phase drift is reduced.

[0022] 2. The resonant ring has internal threads at both ends of its through-hole for detachable connection to the top cover and transmission structure, respectively. The outer rib ring assembly is then positioned separately. By first aligning the inner ring's coaxiality using the upper and lower threads, and then independently adjusting the phase / anti-rotation of the rib ring assembly, the geometric and circumferential uniformity are addressed in two steps. This allows for an assembly coaxiality ≤0.01 mm, and reduces the startup phase offset by an order of magnitude after assembly. This solves problems such as difficulty in controlling coaxiality and eccentricity, the reliance on rework or additional counterweights in integrated designs, low efficiency, and large fluctuations.

[0023] 3. The rib ring assembly can be quickly replaced based on actual application scenarios and needs, and the number of ribs, rib width, and groove depth can be selected; by making the rib ring assembly into a standardized part, the resonant ring can be pulled back to the target frequency band by replacing the rib ring assembly with different parameters, thereby improving efficiency and reducing rework rate; it solves problems such as frequency drift caused by machining tolerance, and that some batch parts are high and some are low, which are difficult to remedy with integrated parts.

[0024] 4. More direct suppression of frequency difference splitting: The annular ribs are symmetrically distributed and periodically arranged from the middle of the resonant ring to both sides, realizing the periodic homogenization of stiffness and mass. The symmetrical distribution suppresses bias to one side, effectively improving the modal anti-deflection capability. Finite element comparison shows that the deflection angle is significantly reduced. It solves the problems of modal splitting and increased frequency difference caused by uneven circumferential stiffness due to processing and assembly.

[0025] 5. By shifting the risk of tool deflection in thin-walled structures to the outer ring assembly for separate machining of complex annular ribs, the inner resonant ring remains a relatively simple rotating body, allowing for greater control over its dimensions and shape. This improves yield and pass rate, and shortens the machining cycle time. It also solves the problems of difficult machining, easy deformation, and high scrap rates associated with directly machining thin-walled ribs onto the resonant ring.

[0026] 6. Performance can be restored by replacing the outer rib ring assembly individually, simplifying the spare parts strategy and reducing lifecycle costs. In contrast, existing integrated technologies require the entire unit to be scrapped if the rib area is damaged or contaminated. Furthermore, after lifespan testing, this invention significantly improves the repairability rate, reduces the overall scrap rate, and shortens maintenance time.

[0027] 7. The top cover and transmission structure are threadedly fitted to the resonant ring. The top cover and the upper internal thread form a controllable preload and positioning, which, together with the lower transmission structure, forms an upper and lower clamping adjustment, enabling fine-tuning of coaxiality and suppression of phase drift after installation. This solves the problems of difficult-to-control assembly coaxiality and the easy disturbance of the free edge at the top of the resonator, thus amplifying modal offset.

[0028] 8. This invention employs a cylindrical resonator design; the combination of a cylindrical outer wall and a rib ring assembly, compared to a cup-shaped bottom opening (modified hole) path, reduces the disturbance of the bottom additional structure to the electrode coupling, which is beneficial to the stability of the readout link. This achieves high modal stability and controllability in processing and assembly on a miniaturized and lightweight platform.

[0029] 9. The threaded connection between the sealing cover and the base creates a relatively constant sealed, low-damping environment, improving modal stability and signal-to-noise ratio. This mitigates the impact of external air pressure, humidity, and pollution on modal performance and quality factors.

[0030] 10. The present invention employs a combination of octagonal electrode array, circular circuit board, and through-hole wiring to achieve symmetrical circuit and mechanical layout, thereby reducing uneven excitation and system errors.

[0031] 11. The precision-machined rib ring assembly and resonant ring are clamped together, and the subsequent thread fit and attitude adjustment are combined to comprehensively reduce the fundamental cause of modal deviation.

[0032] 12. This invention achieves large-scale consistency, meaning the impact of process variations on performance is more controllable. Sensitive circumferential stiffness homogenization is handled by reusable, mass-producible rib-ring assemblies, while high-precision rotating parts are concentrated in the inner ring. Process layers are implemented, ensuring stability from the source. This solves the unpredictable drift problems caused by tool wear and fixture variations in mass production.

[0033] In summary, this invention integrates mechanical structure and assembly posture adjustment methods to suppress the impact of defects, physically separates mass compensation and stiffness shaping, reduces the coupling between the two from the source, and does not rely on shaping holes and BP neural network modeling, which facilitates maintenance and graded mass production. Attached Figure Description

[0034] Figure 1 This is a cross-sectional structural diagram of an inertial navigation gyroscope provided in an embodiment of the present invention.

[0035] Figure 2 This is a front view of the assembly structure of the inertial navigation gyroscope provided in an embodiment of the present invention, excluding the sealing cover.

[0036] Figure 3 This is a top view of the assembly structure of the inertial navigation gyroscope provided in an embodiment of the present invention, excluding the sealing cover.

[0037] Figure 4 This is a schematic diagram of the assembly structure of an inertial navigation gyroscope including a sealing cover, provided for an embodiment of the present invention.

[0038] Figure 5a and Figure 5b These are horizontal cross-sectional top views of the inertial navigation gyroscope provided in the embodiments of the present invention at different heights.

[0039] Figure 6a , Figure 6b and Figure 6c These are schematic diagrams showing the assembly details of different parts of the inertial navigation gyroscope provided in the embodiments of the present invention, based on the modeling software model.

[0040] Figure 7a and Figure 7b The figures show the coincidence of the mode shapes before and after the mode shape shift caused by the concentrated mass in the cylindrical resonator resonator embodiment of the present invention, with and without ring ribs.

[0041] Reference numerals: 1-Resonant ring, 2-Rib ring assembly, 3-Support structure, 4-Transmission structure, 5-Top cover, 6-Piezoelectric electrode, 7-Gyroscope base, 8-Circuit board, 9-Sealing cover, 10-Bolt. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0043] Modal localization through specific structures can suppress modal variations caused by defects, including the fragmentation of characteristic frequencies and the shift of mode shapes. This embodiment proposes a scheme to add a rib ring assembly to the resonant ring of a cylindrical resonator to correct the error caused by surface concentrated mass in the resonant ring under operating modes.

[0044] This embodiment provides a cylindrical solid-state wave localized navigation gyroscope with surface defect suppression function. Based on the precession exhibited by the cylindrical gyroscope during high-speed rotation, it performs navigation and other behaviors. When there is an input angular velocity in the axial direction, the sensitive mode of the harmonic oscillator, excited by the Coriolis force, has a characteristic frequency consistent with the driving mode. The vibration of the sensitive mode of the harmonic oscillator acts on the piezoelectric electrode 6 at the bottom of the harmonic oscillator cup through the transmission structure 4, generating bound charges under the piezoelectric effect. By detecting and adjusting the output charge signal of the piezoelectric electrode 6, the magnitude of the input angular velocity in the axial direction of the cylindrical harmonic oscillator can be calculated.

[0045] Specifically, the solid-state wave localization inertial navigation gyroscope provided in this embodiment is as follows: Figures 1 to 6c As shown, it includes a cylindrical resonator, a top cover 5, a support structure 4, a transmission structure 5, a gyroscope base 7, a piezoelectric electrode 6, a circuit board 8, and a sealing cover 9.

[0046] The gyroscope base 7 is a cylindrical base with a frustum made of metal. The gyroscope base 7 has threaded holes arranged in a square pattern around its perimeter. After being placed on a horizontal and stable mounting platform, it is connected to the platform via bolts 10 and the threaded holes. The frustum of the gyroscope base 7 has threaded holes symmetrically arranged along its central axis on its upper surface, through which the circuit board 8 is connected to the gyroscope base 7 via bolts. The cylindrical resonator has piezoelectric electrodes 6 arranged radially in a regular octagonal pattern at its base. The lower surface of the piezoelectric electrodes 6 is connected to the circuit board 8 via leads. The lower surface of the circuit board 8 is connected to external circuitry through through holes on the frustum of the gyroscope base 7 and square grooves on the bottom of the gyroscope base 7.

[0047] Regarding the sealing between the gyroscope base 7 and the sealing cover 9, the gyroscope base 7 can be threaded on its side wall, and the sealing cover 9 can be connected to the gyroscope base 7 via the threads on its inner wall to form a closed structure. Alternatively, the sealing cover can have a flange flush with the edge of the gyroscope base 7, and be integrally fixed to the mounting platform with bolts. The gap between the sealing cover and the gyroscope base 7 can be sealed with sealant.

[0048] The cylindrical resonator includes a resonant ring 1 and a rib ring assembly 2. The resonant ring 1 is a cylinder with a through hole in the middle. The upper and lower ends of the through hole are provided with internal threads for detachable connection with the top cover 5 and the transmission structure 4. The rib ring assembly 2 is a cylindrical shell structure with a circular groove, which is fitted onto the top of the resonant ring 1 through the circular groove. The outer wall of the rib ring assembly 2 is periodically provided with annular ribs, which are symmetrically distributed from the middle of the resonant ring to both sides. The rib ring assembly 2 is precision machined at the same time as the resonant ring 1 during the processing.

[0049] The support structure 3 is located between the resonant ring 1 and the gyroscope base 7. The support structure 3 is connected to the top of the frustum of the gyroscope base 7 through an annular sealing gasket and is in contact with or fixed to the bottom of the resonant ring 1.

[0050] The transmission structure 4 is a column with an external thread at the top for engaging with the internal thread of the resonant ring 1 and a baffle at the bottom. The top of the transmission structure passes through the connecting hole on the gyroscope base 7 and connects to the resonant ring 1 to transmit vibration. The diameter of the column of the transmission structure is 4 mm and the tooth angle of the external thread is 60°. The support structure is a hollow column fitted onto the transmission structure. The support structure is a hollow column with a wall thickness of 1.5 mm and an internal thread pitch of 0.5–1 mm.

[0051] Specifically, in this embodiment, the resonant ring 1 is a hollow cylindrical ring with an outer diameter R1=25mm, a thickness T1=21mm, and a height H1=15.5mm; the rib height h=1.5mm, the rib width d1=0.5mm, and the rib spacing d2=0.5mm on the annular ribs of the rib ring assembly 2 are provided with a total of eight annular ribs.

[0052] The support structure 3 is a hollow cylindrical ring with an outer diameter R2=4mm, a thickness T2=1.5mm, and a height H2=5mm; the transmission structure 4 has a height H3=25mm; the piezoelectric electrode 6 has a thickness t1=0.4mm, a length L=8.5mm, and a width b=2mm; the circuit board 8 has a diameter D=30mm and a thickness t2=2mm; the sealing cover 9 has a height H4=50mm and a wall thickness T3=2.5mm; the total weight of the cylindrical resonator is m=7.591g.

[0053] The top cover 5 consists of a cover plate, a boss, and a connecting post. The boss is located in the middle of the upper surface of the cover plate, and the connecting post has an external thread for engaging with the internal thread of the resonant ring 1. After assembly, the top cover 5 further suppresses the phase shift of the working mode. The coaxiality error of the boss and the connecting post is ≤0.01 mm, and the fitting gap between the top cover and the cylindrical resonator is 0.02–0.05 mm. Among them, the boss has a radius r1=6 mm and a height h1=1 mm, the cover plate has a radius r2=12.5 mm and a height h2=1 mm, and the connecting post has a radius r3=4 mm and a height h3=3 mm.

[0054] In this embodiment, both the resonant ring and the rib ring assembly are made of fused silica. Quartz has high elasticity and strength, a low coefficient of thermal expansion, a high mechanical quality factor, and a low temperature coefficient of elastic modulus, making it a widely used material for gyroscope resonators. The bottom of the cylindrical resonator features uniformly distributed piezoelectric electrodes 6 in a regular octagonal shape. These piezoelectric electrodes are PZT-5H piezoelectric strain gauges, connected to the circuit board via leads, and can be adjusted via an external circuit to achieve mechanical balance of the cylindrical resonator. The sealing cover 9 and the gyroscope base 7 form a sealed space and are evacuated to prevent the resonator's operating modes from being affected by the external environment. Furthermore, the materials and coefficients of thermal expansion of the resonant ring and the rib ring assembly can also be different.

[0055] Preferably, in one embodiment, the inner resonant ring and the rib ring assembly are allowed to use different materials / heat treatments (e.g., the inner ring uses a low-expansion material, and the outer ring uses a higher-strength material), separating the thermal stress path from the stiffness shaping. This enables a smaller frequency drift slope under temperature cycling (e.g., −40 to +85°C); faster phase return after temperature drift; and solves the problem of frequency and phase drift caused by thermal expansion and contraction under different operating conditions; and addresses the issue of single-material integration that cannot be easily adjusted.

[0056] In one embodiment, the rib ring assembly 2 is a replaceable series component with rib parameters completely different from those in the above embodiments, used for rapid frequency tuning and banding; and the rib ring assembly and the resonant ring sleeve surface are provided with an annular seal and damping layer to suppress environmental disturbances.

[0057] In one embodiment, the rib ring assembly 2 is fixed to the resonant ring by means of anti-rotation key, spline, three-point positioning, etc., allowing for phase fine adjustment and locking; it maintains both detachability and stability; and solves the problem that the sleeve method may cause rotation or wobbling, which may cause position drift after long-term use.

[0058] The specific scheme adopted in this embodiment of the invention for adding a rib ring assembly to a cylindrical resonator and analyzing its suppression of phase shift of the operating mode and fragmentation of the characteristic frequency of the operating mode is as follows:

[0059] 1. Machining scheme for adding a rib ring assembly to a cylindrical resonator: When machining the resonator, leave at least 2mm-3mm of finishing allowance on the blank, and at least 0.8mm of finishing allowance on the outer surface of the resonator ring. During the finishing of the resonator ring, a fixture should be provided to fix the resonator ring to prevent "tool deflection" due to thin-walled vibration, so that the resonator ring and the rib ring assembly can be finished simultaneously. It should be noted that, to solve the problem of machining deformation, relevant process parameters such as cutting speed, feed rate, tool geometry parameters, fixture positioning method, and clamping force should be determined through trial and error for resonators of different sizes.

[0060] 2. Analysis of the phase shift effect of the rib ring assembly in suppressing the working mode: Figure 7aThe modal shape diagrams calculated by finite element software on the resonant ring without the addition of the rib ring assembly show that the mode shape deflection is relatively large after measurement. Figure 7b When adding rib parameters, the modal shape diagrams calculated by the finite element analysis software show a small degree of mode shape deflection after measurement. It should be noted that measurement errors exist, but analysis after adding the rib assembly reveals a significant suppression of the working mode shape deflection. More precise values ​​can be determined and calculated by those skilled in the art without any creative effort.

[0061] In one embodiment, a method for manufacturing the above-mentioned solid-state wave localization inertial navigation gyroscope is provided, including: reserving a machining allowance of 0.8-3 mm on the outer surface of the resonant ring; using a synchronous support fixture on the inner and outer surfaces to suppress thin-wall vibration, and simultaneously finishing the resonant ring and rib ring assembly in the same clamp; and after assembly, finely adjusting the coaxiality by threaded engagement between the top cover and the transmission structure to reduce modal shift and characteristic frequency fragmentation caused by machining and assembly defects.

[0062] In summary, the technical solution of this invention achieves solid-state wave localization through the rib ring assembly, thereby suppressing phase shifts in the operating mode and breaking down the resonant characteristic frequencies of the operating mode. While reducing size to suit lightweight applications, it effectively reduces the impact of manufacturing defects on performance, thus lowering production costs and significantly improving the accuracy and stability of the gyroscope.

[0063] This invention is not limited to the embodiments described above. The above description of specific embodiments is intended to illustrate and explain the technical solutions of this invention. The specific embodiments described above are merely illustrative and not restrictive. Without departing from the spirit and scope of the claims, those skilled in the art can make many specific modifications based on the teachings of this invention, and these modifications all fall within the scope of protection of this invention.

Claims

1. A solid-state wave localization inertial navigation gyroscope for suppressing defects, comprising a gyroscope base, piezoelectric electrodes, a circuit board, and a sealing cover; the upper surface of the gyroscope base is provided with a frustum and communicates with a bottom groove through a connecting hole, and the gyroscope base is uniformly provided with fixing holes around the frustum for connecting to a mounting platform; characterized in that, It also includes a cylindrical resonator, a top cover, a support structure, and a transmission structure; the cylindrical resonator is mounted on top of a frustum via the support structure and the transmission structure; the circuit board is fixed on the upper surface of the frustum, the piezoelectric electrodes are arranged in a regular octagon at the bottom of the cylindrical resonator, and the lower surface of the piezoelectric electrodes is connected to the circuit board via leads; the sealing cover is threadedly engaged with the gyroscope base to form a sealed space; the top cover is located at the upper end of the cylindrical resonator; The cylindrical resonator includes a resonant ring and a rib ring assembly. The resonant ring is a cylinder with a through hole in the middle. The upper and lower ends of the through hole are provided with internal threads for detachable connection with the top cover and the transmission structure. The rib ring assembly is a cylindrical shell structure with a circular groove, which is sleeved on the top of the resonant ring through the circular groove. The outer wall of the rib ring assembly is periodically provided with annular ribs, which are symmetrically distributed from the middle of the resonant ring to both sides. The inner resonant ring is used for rotation and vibration to compensate for the mass distribution, while the outer rib ring assembly is used to suppress the phase shift of the working mode and the fragmentation of the characteristic frequency caused by the concentrated mass.

2. The solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1, characterized in that, The ring ribs are provided in eight parts, with a rib height of 1.5 mm, a rib width of 0.5 mm, and a spacing error of less than 0.05 mm between adjacent ring ribs.

3. The solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1, characterized in that, The resonant ring and rib ring assembly are made of fused silica; the gyroscope base is made of metal, and the sealing cover is made of aluminum alloy or titanium alloy with an anti-reflective coating on the inner wall.

4. The solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1, characterized in that, The top cover consists of a cover plate, a boss, and a connecting post. The boss is located in the middle of the upper surface of the cover plate, and the connecting post has an external thread for engaging with the internal thread of the resonant ring. After assembly, the top cover further suppresses the phase shift of the working mode. The coaxiality error of the boss and the connecting post is ≤0.01 mm, and the fitting gap between the top cover and the cylindrical resonator is 0.02–0.05 mm.

5. A solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1, characterized in that, The transmission structure is a column with an external thread at the top for engaging with the internal thread of the resonant ring, and a baffle at the bottom. The top of the transmission structure passes through the connection hole on the gyroscope base and connects to the resonant ring. The support structure is a hollow column fitted onto the transmission structure. The support structure is a hollow column with a wall thickness of 1.5 mm and an internal thread pitch of 0.5–1 mm, and an annular sealing gasket is provided on the connection surface with the frustum.

6. A solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1 or 3, characterized in that, The sealing cover adopts a hollow cylindrical structure with an opening at the bottom. The sealed space formed by the sealing cover and the gyroscope base is used to control the working mode of the cylindrical resonator from the influence of the external environment.

7. A solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1 or 5, characterized in that, The diameter of the cylinder of the transmission structure is 4 mm and the external thread angle is 60°.

8. A solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1, characterized in that, The circuit board is connected to an external circuit through a through-hole in a frustum and connecting wires.

9. A solid-state wave localization inertial navigation gyroscope for suppressing defects according to claim 1, characterized in that, The annular rib and the resonant ring are machined in the same clamping and finishing process in one step to reduce the shape and position errors caused by tool deflection in thin-walled parts.

10. A method for manufacturing a solid-state wave localization inertial navigation gyroscope as described in any one of claims 1-9, characterized in that, include: Leave a machining allowance of 0.8-3 mm on the outer surface of the resonant ring; The inner and outer surface synchronous support fixture is used to suppress thin-walled vibration, and the resonant ring and rib ring assembly are precision machined simultaneously in the same clamping. After assembly, the coaxiality is finely adjusted by the threaded engagement between the top cover and the transmission structure to reduce modal shift and characteristic frequency fragmentation caused by machining and assembly defects.

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