A method for calculating the unbalance of a high-speed thin-walled rotating structure and related devices

Abstract

The present invention discloses a method for calculating the unbalance of a high-speed thin-walled rotary structure and related devices, including: measuring and regionally dividing a single-stage rotary structure; establishing an installation edge analysis model of the rotary structure in combination with the measurement results and the region division results; establishing a geometric error transfer model of the steering gear rotary structure; calculating the unbalance generated due to the change of the rotation axis and the unbalance of each stage of the rotary structure on two correction planes after assembly. The present invention integrates the measured geometric topography data with the finite element model, establishes a stop connection model of the high-speed thin-walled rotary structure with the actual surface topography, and considers the influence of the rotor assembly process on the rotation axis of the rotor, and considers the influence of the change of the assembly axis on the initial unbalance and the centroid, which can accurately predict the unbalance after rotor assembly, and also lay a foundation for the assembly optimization design of this type of high-speed thin-walled rotary structure, improving the first-pass assembly rate and assembly quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent manufacturing, and relates to a method for calculating the unbalance of a high-speed thin-walled rotating structure and related devices. Background Art

[0002] High-speed thin-walled rotating structures are widely used in important machinery such as aero-engines and gas turbines, and have typical operating characteristics of high speed, high pressure, and high temperature, and strict requirements for reliability and service life. The existence of unbalance will generate huge forces and torques during high-speed rotation, seriously affecting the vibration characteristics of mechanical components, which will also directly affect their life and reliability. Therefore, unbalance is a very important indicator in the manufacturing and assembly of high-speed thin-walled rotating structures.

[0003] A high-speed thin-walled rotating structure is generally assembled from multiple parts. During the manufacturing process of the parts, no matter how precise the machinery is used, surface topography errors and self-unbalances of the parts will be generated. Due to the small thickness of the flange at the assembly stop, and the existence of topography errors, large deformations usually occur during the initial tightening of the bolts, and the deformation will have a great impact on the centroid position and initial unbalance of the rotating structure. Therefore, accurately predicting the unbalance distribution of such rotating machinery under different assembly processes is particularly important for optimizing the overall unbalance of the aero-engine rotor and improving the service life and reliability of the rotor.

[0004] There are some problems with the existing methods for predicting the unbalance of high-speed thin-walled rotating structures. The main problems are: the influence of the assembly process on the unbalance of multi-stage high-speed thin-walled rotating structures is not considered, and the change in the initial unbalance measurement of the high-speed thin-walled rotating structure caused by the axis change during the assembly process is not considered. Therefore, the prediction of the change trend of the rotor's unbalance is inaccurate, resulting in inaccurate optimization of the rotor for unbalance, and there is no clear guiding method for the assembly process. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the existing technology and provide a method for calculating the unbalance of a high-speed thin-walled rotating structure and related devices.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions to be implemented:

[0007] In the first aspect, the present invention provides a method for testing the unbalance of a high-speed thin-walled rotating structure, including the following steps:

[0008] Measure and divide regions for a single-stage rotating structure;

[0009] Establish an analysis model of the mounting edge of the rotating structure by combining the measurement results and the region division results;

[0010] Using homogeneous coordinate transformation theory, a geometric error transfer model of a multi-stage rotary structure is established, and the overall spatial pose after assembly is calculated by combining with the mounting edge analysis model;

[0011] According to the overall spatial pose after assembly, the spatial pose of the unbalanced mass obtained after unbalance decomposition in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly are calculated;

[0012] According to the spatial pose of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly, the unbalance amount generated due to the change of the rotation axis and the unbalance amounts of each stage of the rotary structure after assembly on two correction planes are calculated.

[0013] In a second aspect, the present invention provides an unbalance measurement system for a high-speed thin-walled rotary structure, including:

[0014] A measurement module for measuring and dividing regions of a single-stage rotary structure;

[0015] A first model establishment module for establishing a mounting edge analysis model of the rotary structure by combining measurement results and region division results;

[0016] A second model establishment module for establishing a geometric error transfer model of the servo rotary structure using homogeneous coordinate transformation theory, and calculating the overall spatial pose after assembly by combining with the mounting edge analysis model;

[0017] A first calculation module for calculating the spatial pose of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly according to the overall spatial pose after assembly;

[0018] A second calculation module for calculating the unbalance amount generated due to the change of the rotation axis and the unbalance amounts of each stage of the rotary structure after assembly on two correction planes according to the spatial pose of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly.

[0019] In a third aspect, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the above method are implemented.

[0020] In a fourth aspect, the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention integrates the measured geometric morphology data with the finite element model to establish a stop connection model for high-speed thin-walled rotary structures with actual surface morphology, and takes into account the influence of the rotor assembly process on the rotary axis of the rotor, and the influence of the change of the assembly axis on the initial unbalance and the centroid. It can accurately predict the unbalance after rotor assembly, and also lay a foundation for the assembly optimization design of this type of high-speed thin-walled rotary structure, improving the first-pass assembly success rate and assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a flowchart of the method of the present invention.

[0025] Figure 2 It is a schematic flowchart of a method for calculating the unbalance of a high-speed thin-walled rotary structure considering the assembly process according to an embodiment of the present invention.

[0026] Figure 3 It is a diagram of the rigid and flexible region division of a single-stage rotary structure according to an embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the centroid offset caused by the change of the axis after the assembly of a multi-stage rotor according to an embodiment of the present invention.

[0028] Figure 5 It is a schematic diagram of the change of the initial unbalance caused by the change of the axis after the assembly of a multi-stage rotor according to an embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the change of the centroid offset caused by the change of the axis after the assembly of a multi-stage rotor according to an embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of the system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0033] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0034] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0035] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0036] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly defined and limited, if terms such as "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The present invention will be further described in detail below with reference to the accompanying drawings:

[0038] See Figure 1 , an unbalance measurement method for a high-speed thin-walled rotary structure is disclosed in the embodiments of the present invention, including the following steps:

[0039] S1 Measure and divide the single-stage rotary structure into regions;

[0040] S2 Establish an analysis model of the mounting edge of the rotary structure in combination with the measurement results and the region division results;

[0041] S3 uses homogeneous coordinate transformation theory to establish a geometric error transfer model for the steering gear rotation structure, and calculates the overall spatial pose after assembly by combining the mounting edge analysis model;

[0042] S4 According to the overall spatial pose after assembly, calculate the spatial pose of the unbalanced mass obtained after decomposition of the unbalance in the rotation structure after assembly and the spatial pose of the centroid in the rotation structure after assembly;

[0043] S5 Calculate the unbalance generated due to the change of the rotation axis and the unbalances of each level of rotation structure on two correction planes after assembly according to the spatial pose of the unbalanced mass in the rotation structure after assembly and the spatial pose of the centroid in the rotation structure after assembly.

[0044] See Figure 2 , an embodiment of the present invention discloses a method for calculating the unbalance of a high-speed thin-walled rotation structure considering the assembly process, including the following steps:

[0045] S101 Measure and obtain the data of the parts themselves.

[0046] Measure and obtain the true surface topography error data of the front and rear stop surfaces of each part, and process the data to obtain the spatial pose of the stop positions of each component; measure the initial unbalance of each component by a horizontal hard support balancing machine.

[0047] S102 Perform the rigid-flexible region division of the single-stage rotation structure.

[0048] During the assembly process, stress and deformation mainly occur near the joint surface. Therefore, the single-stage rotation structure can be cut into a rigid part and a flexible part. The flexible part is the area near the stop surface affected by assembly deformation, and the rigid part is the area basically not affected by assembly;

[0049] S103 Based on the flexible part of the single-stage rotation structure, establish an installation edge analysis model of the rotation structure considering the assembly process in combination with the true surface topography error data.

[0050] Use the ANSYS APDL programming language to construct a solid model according to the part drawings of the high-speed thin-walled rotation structure: establish a solid model of the flexible part near the installation edge of each rotation structure considering the assembly process, including bolt contact, stop end face contact, and stop interference contact;

[0051] After meshing the flexible body part of the solid model, decouple the solid model from the finite element model; use the ANSYS APDL programming language to select the nodes at the corresponding positions on the mesh, and realize the addition of real surface topography error data by driving the movement of the coordinates of the nodes at the mating surfaces of the corresponding end faces and the spigot. To simplify the input of runout data, expand the runout error so that the radial runout at the same angle on each cross-section of the cylindrical surface is consistent, and the axial runout at the same angle on the end face is consistent;

[0052] Apply loads and constraints to the finite element model, and constrain the flexible body part of the single-stage rotary structure according to the actual situation. Determine the starting points and tightening sequences of bolt tightening in the mounting edge model, apply pre-tightening forces to each bolt in turn, and write them into the load step. Simulate the real assembly situation through the load step. If there are requirements for assembly batches, corresponding bolt pre-tightening forces need to be applied to each batch; after applying the corresponding contacts, interferences, constraints, and bolt tightening, perform a simulation calculation on the mounting edge model.

[0053] S104 Calculate the spatial pose of the rigid body part through the principle of similar triangles, and then obtain the spatial pose of the flexible body part using the mounting edge analysis model

[0054] S105 Use the homogeneous coordinate transformation theory to establish a geometric error transfer model for the multi-stage rotary structure considering the assembly process.

[0055] Extract the coordinate data of the mounting edge model after calculation through ANSYA APDL commands, and use the least squares method to fit the extracted coordinate points to obtain the spatial pose at the mounting edge model;

[0056] Calculate the spatial pose of the rigid body part and the cutting surface: As Figure 3 shown, fit the real topography data by the least squares method, and calculate the spatial pose at the cutting surface through the eccentric position relationship, which can be expressed as:

[0057]

[0058] Since the cutting is parallel to the axis of the turntable, there is no inclination at the end face of the cutting surface, and both A and B are 0. Xc and Yc can be calculated from the eccentricity of the upper and lower end faces of the rotor.

[0059]

[0060] Then calculate the spatial pose of the rigid body part from this. Through the homogeneous coordinate transformation theory, based on the spatial pose of the flexible body part and the spatial pose of the rigid body part, the overall spatial pose after assembly can be calculated, that is, the geometric error transfer model of the multi-stage rotary structure can be obtained.

[0061] S106 Decompose the initial unbalance.

[0062] According to the data measured by the horizontal hard support balancing machine, the initial unbalance is decomposed into unbalance mass and radius at the measurement surface. Based on the position of the unbalance measurement surface and the decomposed radius, the coordinates of the unbalance mass of each level of the rotating structure relative to the front stop error measurement surface can be obtained.

[0063] S107 Obtain the spatial poses of each level of the rotating structure.

[0064] Through the geometric error transfer model, determine the spatial poses of each level of the rotating structure after assembly; according to the spatial pose coordinates of each level of components after assembly, obtain the spatial pose of the decomposed unbalance mass: the original position of the decomposed unbalance mass is relative to the front stop error measurement surface of a single-level part. When the spatial poses of each level of components change, the position of the unbalance mass will also change.

[0065] Based on the spatial poses of each level of the rotating structure and the coordinates of the unbalance mass relative to the front stop error measurement surface, obtain the spatial pose of the decomposed unbalance mass in the rotating structure after assembly.

[0066] Based on the spatial poses of each level of the rotating structure and the coordinates of the centroid position relative to the front stop error measurement surface, obtain the spatial pose of the centroid in the rotating structure after assembly.

[0067] S108 Calculate the unbalance of the multi-level rotating structure considering the assembly process.

[0068] According to the spatial poses of each level of components after the assembly of the multi-level rotating structure components, take the front end of the first component and the rear end of the last component, and calculate the rotating axis after assembly according to the eccentricity.

[0069] Calculate the unbalance caused by the centroid deviation from the axis for each level of components: as Figure 4 shown, after the assembly of the multi-level rotating structure components, due to the existence of eccentricity, the rotating axis of the rotating structure shifts, and the centroid will deviate from the axis. According to the centroid position coordinates, calculate the distance between the centroid and the rotating axis, and then calculate the unbalance caused by the centroid position deviation from the axis.

[0070] Calculate the change in the initial unbalance caused by the axis change for each level of components: as Figure 5 shown, since the initial unbalance of each rotating structure component is measured under its own axis of the rotating structure, therefore, the change in the axis after assembly will also cause a change in the initial unbalance of the rotating structure. According to the position of the unbalance mass obtained by decomposing the initial unbalance, calculate the distance from the unbalance mass obtained by decomposing the initial unbalance to the rotating axis, and then calculate the unbalance caused by the axis shift.

[0071] Calculate the unbalance of each level of components: as Figure 6As shown, the unbalance caused by the centroid offset due to the axis change and the initial unbalance due to the axis change are vectorially added and distributed to the two stop error measurement surfaces to obtain the unbalances on each level of components. The unbalances on each level of components after assembly are vectorially added at the same stop error measurement surfaces to obtain the unbalances at each stop error measurement surface. Then, the unbalances at each stop error measurement surface are respectively projected onto the two correction planes of the rotary structure after assembly to obtain the unbalances of each level of rotary structure after assembly on the two correction planes.

[0072] As Figure 7 shown, an embodiment of the present invention discloses an unbalance measurement system for a high-speed thin-walled rotary structure, including:

[0073] A measurement module for measuring and dividing regions of a single-level rotary structure;

[0074] A first model establishment module for establishing an installation edge analysis model of the rotary structure in combination with the measurement results and the region division results;

[0075] A second model establishment module for establishing a geometric error transfer model of the servo rotary structure using the homogeneous coordinate transformation theory, and calculating the overall spatial pose after assembly in combination with the installation edge analysis model;

[0076] A first calculation module for calculating the spatial pose of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly according to the overall spatial pose after assembly;

[0077] A second calculation module for calculating the unbalance generated after the rotation axis changes and the unbalances of each level of rotary structure after assembly on the two correction planes according to the spatial pose of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly.

[0078] A computer device provided by an embodiment of the present invention. The computer device of this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned various method embodiments are implemented. Or, when the processor executes the computer program, the functions of each module / unit in the above-mentioned various device embodiments are implemented.

[0079] The computer program can be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to complete the present invention.

[0080] The computer device can be a computing device such as a desktop computer, a notebook, a handheld computer, and a cloud server. The computer device may include, but is not limited to, a processor and a memory.

[0081] The processor can be a Central Processing Unit (CPU), or can also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0082] The memory can be used to store the computer program and / or module. The processor realizes various functions of the computer device by running or executing the computer program and / or module stored in the memory, and by calling the data stored in the memory.

[0083] If the modules / units integrated in the computer device are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-described embodiment methods of the present invention, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-described various method embodiments can be realized. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for measuring the unbalance of a high-speed thin-walled rotating structure, characterized in that, It includes the following steps: Measure and divide the area of the single-stage rotary structure; Establish an installation edge analysis model of the rotary structure by combining the measurement results and the area division results; The installation edge analysis model includes: Using the ANSYS APDL programming language, construct a solid model according to the part drawing of the high-speed thin-walled rotary structure: establish a solid model of the flexible part near the installation edge of each rotary structure considering the assembly process, including bolt contact, spigot end face contact, and spigot interference contact; After meshing the solid model of the flexible part, decouple the solid model from the finite element model; use the ANSYS APDL programming language to select the corresponding nodes on the mesh, and realize the addition of real surface topography error data by driving the movement of the node coordinates at the corresponding end face and spigot mating surface positions; expand the runout error to make the radial runout at the same angle on each cross-section of the cylindrical surface consistent, and the axial runout at the same angle on the end face consistent; Apply loads and constraints to the finite element model, and constrain the flexible part of the rotary structure according to the actual situation; determine the starting point and tightening sequence of bolt tightening in the installation edge model, apply pre-tightening force to each bolt in turn, and write it into the load step to simulate the real assembly situation through the load step; if there are assembly batch requirements, corresponding bolt pre-tightening forces need to be applied to each batch; after applying the corresponding contact, interference, constraints, and bolt tightening, perform simulation calculations on the installation edge model; Establish a geometric error transfer model of the multi-stage rotary structure using the homogeneous coordinate transformation theory, and calculate the overall spatial pose after assembly by combining the installation edge analysis model; According to the overall spatial pose after assembly, calculate the spatial pose of the unbalanced mass obtained after unbalance decomposition in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly; Calculate the unbalance amount generated due to the change of the rotation axis and the unbalance amounts of each stage of the rotary structure on the two correction planes after assembly according to the spatial pose of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly.

2. The method for measuring the unbalance of a high-speed thin-walled rotating structure according to claim 1, wherein The measurement and area division of the single-stage rotary structure include: Measure the single-stage rotary structure as follows: Measure the real surface topography error data of the front and rear spigots of each part, and process the data to obtain the spatial pose of the spigot position of each component; measure the initial unbalance amount of each component by a horizontal hard-bearing balancing machine; Divide the area of the single-stage rotary structure as follows: Cut the single-stage rotary structure into a rigid part and a flexible part. The flexible part is the area near the spigot affected by assembly deformation, and the rigid part is the area not affected by assembly.

3. The method for measuring the unbalance of a high-speed thin-walled rotating structure according to claim 1, characterized in that, The establishment of a geometric error transfer model of the multi-stage rotary structure using the homogeneous coordinate transformation theory and the calculation of the overall spatial pose after assembly by combining the installation edge analysis model include: Extract the coordinate data calculated by the installation edge model through ANSYA APDL commands, and use the least squares method to fit the extracted coordinate points to obtain the spatial pose of the flexible part; Calculate the spatial pose of the rigid part and the cutting surface: use the least squares method to fit the real topography data, and calculate the spatial pose of the cutting surface through the eccentric position relationship: Among them, T represents the spatial pose of the installation edge. ([[]] A , B , 1) is the normal vector obtained by fitting; ([[]] The eccentricity of the rotor stop surface measurement surface is obtained by calculating the eccentricity of the upper and lower stops. X c , Y c ), and h is the relative height of the stop surface measurement surface; since the cutting is performed parallel to the axis of the turntable, there is no inclination at the end face of the cutting surface, A and B are both 0; X c and Y c are obtained by calculating the eccentricity of the upper and lower end faces of the rotor; H is the total height of the rotor, h 1 and h 2 are the cutting distances at two faces of the rotor, ( eccX 1, eccY 1) and ( eccX 2, eccY 2) respectively represent the eccentric coordinates of the lower rabbet of the rotor and the eccentric coordinates at the upper rabbet of the rotor; ( X c1 , Y c1 ) and ( X c2 , Y c2 ) respectively represent the eccentric coordinates of the lower cutting surface and the upper cutting surface of the rotor; Calculate the spatial pose of the rigid body part based on the spatial poses at the cutting plane and the upper and lower rabbets; establish a geometric error transfer model for the multi-stage rotary structure using the homogeneous coordinate transformation theory, and calculate the overall spatial pose after assembly based on the spatial poses of the rigid body part and the flexible body part.

4. The method for measuring the unbalance of a high-speed thin-walled rotating structure according to claim 3, characterized in that The calculated spatial poses of the unbalanced masses after decomposition of the calculated unbalance and the spatial pose of the centroid in the rotary structure after assembly include: Based on the initial unbalance measured by the horizontal hard-bearing balancing machine, decompose the initial unbalance into unbalanced mass and radius at the measurement surface, and obtain the coordinates of the unbalanced masses of each stage of the rotary structure relative to the front rabbet error measurement surface according to the position of the unbalance measurement surface and the decomposed radius. Determine the spatial poses of each stage of the rotary structure after assembly through the geometric error transfer model, and then obtain the spatial poses of the decomposed unbalanced masses in the rotary structure after assembly according to the spatial poses of each stage of the rotary structure and the coordinates of the unbalanced masses relative to the front rabbet error measurement surface. Determine the spatial poses of each stage of the rotary structure after assembly through the geometric error transfer model, and then obtain the spatial pose of the centroid in the rotary structure after assembly according to the spatial poses of each stage of the rotary structure and the coordinates of the centroid position relative to the front rabbet error measurement surface.

5. The method for measuring the unbalance of a high-speed thin-walled rotating structure according to claim 4, wherein The calculated unbalances generated due to the change of the rotation axis and the unbalances of each stage of the rotary structure at the two correction planes after assembly include: Calculate the rotation axis after assembly based on the overall spatial pose after assembly, and obtain the unbalance generated due to the change of the rotation axis of the initial unbalance according to the rotation axis and the spatial pose of the unbalanced mass in the rotary structure after assembly. Obtain the unbalance generated due to the centroid offset caused by the change of the rotation axis according to the rotation axis and the spatial pose of the centroid in the rotary structure after assembly. Calculate the unbalances of each stage of the rotary structure at the two correction planes after assembly according to the unbalance generated due to the change of the rotation axis and the unbalance generated due to the centroid offset caused by the change of the rotation axis.

6. A high-speed thin-walled rotating structure unbalance measurement system based on the test method described in claim 1, characterized in that, Include: A measurement module for measuring and dividing regions of a single-stage rotary structure; A first model establishment module for establishing an installation edge analysis model of the rotary structure in combination with the measurement results and the region division results; A second model establishment module for establishing a geometric error transfer model of the servo rotary structure using the homogeneous coordinate transformation theory, and calculating the overall spatial pose after assembly in combination with the installation edge analysis model; A first calculation module for calculating the spatial poses of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly according to the overall spatial pose after assembly; A second calculation module for calculating the unbalance generated due to the change of the rotation axis and the unbalances of each stage of the rotary structure at the two correction planes after assembly according to the spatial poses of the unbalanced mass in the rotary structure after assembly and the spatial pose of the centroid in the rotary structure after assembly.

7. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method described in any one of claims 1-5.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-5.

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