Large-aperture spliced reflecting surface and splicing and adjusting method thereof

Abstract

The invention provides a large-caliber spliced reflecting surface and a splicing and adjusting method thereof, and the method comprises the steps: applying a six-degree-of-freedom Stewart platform to the posture adjustment in the splicing process of an upper part, a lower part, a left part and a right part of the reflecting surface, and enabling the upper part, the lower part, the left part and the right part of the reflecting surface to be parked on the Stewart platform through an adjustable supporting tool, high-precision position and posture fine adjustment in the splicing process of an upper petal, a lower petal, a left petal and a right petal of the reflecting surface is achieved through movement of the Stewart platform, then a multilateral measurement system is formed through multiple laser trackers, position and posture deviation between the petals of the reflecting surface is measured, the position and posture deviation is calculated as the position and posture regulation and control quantity of the Stewart platform, the Stewart platform is controlled to drive the upper petal, the lower petal, the left petal and the right petal of the reflecting surface to carry out posture adjustment, and the position and posture adjustment precision of the reflecting surface is improved. The spliced surface type is measured in a non-contact mode through a laser radar, and multiple times of iterative approximation through installation, measurement and adjustment are carried out till the splicing and assembling precision of the reflecting surface meets the design requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite optical reflector antenna assembly, and in particular, to a large-aperture spliced ​​reflector and a splicing and adjusting method thereof, and more particularly, to a high-precision and high-efficiency splicing and adjusting method for a large-aperture spliced ​​reflector antenna. Background Art

[0002] With the development of space optical technology, space reflector antennas need to have larger apertures and high surface accuracy requirements. Large-aperture reflectors require multiple petals to be spliced ​​and deployed after entering orbit. Since the adjustment range of each spliced ​​petal of the reflector is limited in orbit, in order to obtain the maximum adjustment range after deployment in orbit, the reflector splicing petals must be assembled with high precision during ground assembly to ensure that the surface accuracy meets the index requirements after the satellite is released from gravity after entering orbit. For large-aperture reflectors with multiple petals, small gaps between the splices and high surface accuracy are required, and the precision requirements for assembly and adjustment are high, which makes assembly and adjustment difficult. The existing installation and debugging methods are not adaptable to the high-precision splicing and adjustment of reflectors. In addition, traditional space measurement and adjustment methods have not yet realized the integrated closed-loop control of "precision measurement-precision adjustment", and the adjustment accuracy, efficiency and reliability are difficult to guarantee.

[0003] Patent document CN221727465U (application number: 202420292503.X) discloses a spliced ​​reflective surface, which relates to the field of satellite antenna technology, including a central disk body, four arc-shaped brackets are evenly fixed on the outside of the central disk body, and positioning columns are fixed on the outside of the central disk body and between every two arc-shaped brackets. The outside of each positioning column is slidably connected to a reflective petal body, and the outside of each reflective petal body is symmetrically fixed with side sliding protrusions, and each arc-shaped bracket is fixed with an assembly buckle seat on the side away from the central disk body. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a large-diameter spliced ​​reflective surface and a splicing and adjustment method thereof.

[0005] A large-caliber splicing reflective surface splicing and adjustment method provided by the present invention comprises:

[0006] Step S1: constructing a precision measurement system based on laser radar, multiple laser trackers and a surface difference meter;

[0007] Step S2: installing the middle lobe of the reflective surface on a reflective surface back frame, wherein the reflective surface back frame is installed on a load parking frame;

[0008] Step S3: The upper lobe adjustable support device of the reflecting surface, the lower lobe adjustable support device of the reflecting surface, the left lobe adjustable support device of the reflecting surface, and the right lobe adjustable support device of the reflecting surface are respectively installed on corresponding Stewart platforms, and the upper lobe adjustable support device of the reflecting surface, the lower lobe adjustable support device of the reflecting surface, the left lobe adjustable support device of the reflecting surface, and the right lobe adjustable support device of the reflecting surface are respectively moved to initial splicing positions using the Stewart platforms;

[0009] Step S4: respectively adjust the heights of the upper lobe adjustable support device of the reflecting surface, the lower lobe adjustable support device of the reflecting surface, the left lobe adjustable support device of the reflecting surface, and the right lobe adjustable support device of the reflecting surface to the initial splicing height, and respectively install the upper lobe, lower lobe, left lobe, and right lobe of the reflecting surface on the upper lobe adjustable support device, the lower lobe adjustable support device, the left lobe adjustable support device, and the right lobe adjustable support device of the reflecting surface;

[0010] Step S5: Based on the precise measurement system, the splicing process is measured to obtain precise measurement data, and the precise measurement data is transmitted to the data acquisition and control system. The data acquisition and control system drives the corresponding Stewart platform to adjust the splicing reflection surface according to the preset requirements, and repeatedly triggers step S5 until the measurement result meets the preset requirements;

[0011] Step S6: Install the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface to the reflecting surface back frame respectively, withdraw the upper lobe adjustable support device, lower lobe adjustable support device, left lobe adjustable support device and right lobe adjustable support device of the reflecting surface, and withdraw the Stewart platform.

[0012] Preferably, step S4 includes: when the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface are respectively installed on the upper lobe adjustable supporting device, the lower lobe adjustable supporting device, the left lobe adjustable supporting device and the right lobe adjustable supporting device of the reflecting surface, the surface accuracy of the upper lobe, the lower lobe, the left lobe and the right lobe of the reflecting surface are measured by laser radar, and the upper lobe adjustable supporting device, the lower lobe adjustable supporting device, the left lobe adjustable supporting device and the right lobe adjustable supporting device of the reflecting surface are fine-tuned to make the surface accuracy of the upper lobe, the lower lobe, the left lobe and the right lobe of the reflecting surface meet the preset requirements and eliminate the influence of gravity deformation.

[0013] Preferably, step S5 comprises:

[0014] Step S5.1: setting calibration feature points on the mid-lobe of the reflection surface, and calibrating the relationship between the mid-lobe feature points and the surface shape of the reflection surface by using a laser radar and a laser tracker;

[0015] Step S5.2: Set precise measurement feature points on each Stewart platform, set calibration feature points on the upper lobe, lower lobe, left lobe and right lobe of the reflector surface, and use multiple laser trackers to form a multilateral measurement system to measure the relative position relationship between each Stewart platform and the upper lobe, lower lobe, left lobe and right lobe of the reflector surface. Use laser radar and laser tracker to calibrate the relationship between the upper lobe, lower lobe, left lobe and right lobe of the reflector surface and the surface shape;

[0016] Step S5.3: Use multiple laser trackers to measure the calibrated feature points of the middle lobe of the reflector and the upper lobe, lower lobe, left lobe and right lobe of the reflector. Based on the relationship between the calibrated feature points and the surface shape and the relative posture relationship between the Stewart platform and the upper lobe, lower lobe, left lobe and right lobe of the reflector, use a surface difference meter to measure the gap and height difference between the upper lobe, lower lobe, left lobe, right lobe and the middle lobe of the reflector to obtain precise measurement data.

[0017] Step S5.4: transmitting the precise measurement data to a data acquisition and control system, wherein the data acquisition and control system calculates the posture adjustment values ​​of the upper lobe, the lower lobe, the left lobe, and the right lobe of the reflective surface in the Stewart platform coordinate system based on the precise measurement data and the numerical model theoretical value;

[0018] Step S5.5: drive and control the Stewart platform to adjust the position of the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface.

[0019] Preferably, the step S5.1 comprises: setting feature points for precise measurement and calibration in the non-coated surface area including the side and back sides of the lobe in the reflective surface.

[0020] Preferably, step S5.2 comprises: setting feature points for precise measurement and calibration on the non-coated surface areas including the side edges and back sides of the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface.

[0021] Preferably, step S5.5 includes: driving and controlling the Stewart platform to drive the upper lobe, the lower lobe, the left lobe and the right lobe of the reflecting surface to adjust their positions by first rotating and then translating.

[0022] Preferably, during the posture adjustment process, the upper lobe splicing laser ranging sensor and the lower lobe splicing laser ranging sensor installed on the back of the reflecting surface; the left lobe splicing laser ranging sensor and the right lobe splicing laser ranging sensor of the reflecting surface are used for anti-collision monitoring.

[0023] Preferably, step S6 includes: installing the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface on the reflecting surface back frame respectively, and then lowering the supporting heights of the adjustable support device of the upper lobe, the adjustable support device of the lower lobe, the adjustable support device of the left lobe and the adjustable support device of the right lobe to below the reflecting surface back frame respectively, and the Stewart platform carries the adjustable support device of the upper lobe, the adjustable support device of the lower lobe, the adjustable support device of the left lobe and the adjustable support device of the right lobe of the reflecting surface away from the reflecting surface back frame, thereby completing the withdrawal of the adjustment device and equipment.

[0024] A large-diameter spliced ​​reflective surface provided by the present invention is obtained by using the large-diameter spliced ​​reflective surface splicing and adjustment method described above.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention applies a high-precision Stewart platform to the posture fine-tuning during the splicing process of the splicing reflective surface, which can not only ensure the splicing and adjustment accuracy, but also improve the splicing and adjustment efficiency;

[0027] 2. The present invention sets up a high-precision measurement system combining a multi-laser tracker and a laser radar by setting feature points, calibrates the relationship between the feature points of the reflective surface and the surface shape through precise measurement, and converts the surface shape accuracy to the posture accuracy of the feature points. The measurement system has high measurement accuracy, and the measurement is more convenient and easier to implement after calibration and conversion;

[0028] 3. The present invention solves the precise measurement data through the solving software, solves the posture deviation of each petal of the reflecting surface relative to the reference middle petal as the posture adjustment amount in the Stewart platform coordinate system, directly drives the Stewart platform to perform iterative fine-tuning, and realizes the integrated control of "precision measurement-precision adjustment" through closed-loop control to ensure the final splicing installation accuracy;

[0029] 4. The present invention realizes the simple process steps of "installation-testing-adjustment" of the spliced ​​reflective surface. Each petal of the reflective surface is independently installed and adjusted, and the installation and adjustment processes do not affect each other.

[0030] 5. The present invention uses a laser rangefinder sensor to perform anti-collision monitoring during the assembly and adjustment process to avoid collisions during the adjustment process, effectively control the assembly and adjustment risks, and ensure the reliability of splicing and assembly.

[0031] 6. The present invention solves the technical problems that large-diameter reflective surfaces with multiple petals require small gaps in the splicing seams, high surface accuracy, great difficulty in splicing and adjustment, low assembly and adjustment accuracy, and low assembly and adjustment efficiency and reliability. Through the integrated closed-loop control of "assembly-measurement-adjustment", combined with precise measurement and high-precision posture fine-tuning, the accuracy, efficiency and reliability of the splicing and adjustment of the reflective surfaces are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0033] Figure 1 The present invention discloses a process flow for splicing and assembling spliced ​​reflective surfaces.

[0034] Figure 2 It is a schematic diagram of the splicing and assembly method of the spliced ​​reflective surface.

[0035] Among them, 1-load parking rack; 2-reflecting surface back frame; 3-reflecting surface middle petal; 4-reflecting surface upper petal; 5-reflecting surface lower petal; 6-reflecting surface left petal; 7-reflecting surface right petal; 8-reflecting surface upper petal adjustable support device; 9-reflecting surface lower petal adjustable support device; 10-reflecting surface left petal adjustable support device; 11-reflecting surface right petal adjustable support device; 12-first Stewart platform; 13-second Stewart platform; 14-third Stewart platform; 15-fourth Stewart platform; 16-reflecting surface upper petal splicing laser ranging sensor; 17-reflecting surface lower petal splicing laser ranging sensor; 18-reflecting surface left petal splicing laser ranging sensor; 19-reflecting surface right petal splicing laser ranging sensor; 20-laser radar; 21-first laser tracker; 22-second laser tracker; 23-third laser tracker; 24-fourth laser tracker; 25-face difference meter; 26-data acquisition and control system. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0037] Example 1

[0038] According to a large-diameter spliced ​​reflective surface splicing and adjustment method provided by the present invention, Figure 1-2 As shown, it includes: high-precision multi-degree-of-freedom posture adjustment of the spliced ​​reflective surface based on the Stewart platform, high-precision measurement of the splicing process by the laser radar and multi-laser tracker, and the precise measurement data acquisition and solution and control system to solve the posture adjustment requirements and drive the Stewart platform to adjust the posture of the spliced ​​reflective surface. Through the integrated closed-loop control of "precision measurement-precision adjustment", high-precision and efficient splicing of the reflective surface is achieved;

[0039] Specifically, it includes:

[0040] Step 1: The reflective surface back frame 2 is installed on the load parking frame 1, and the reflective surface middle lobe 3 is hoisted and installed on the reflective surface back frame 2. The laser radar 20 and the first laser tracker 21, the second laser tracker 22, the third laser tracker 23, and the fourth laser tracker 24 establish a precision measurement system, and feature points for precision measurement and calibration are set on the side, back and other non-coated surface areas of the reflective surface middle lobe 3, and the feature points and surface shape of the reflective surface middle lobe 2 are precisely measured, and the relationship between the feature points and the surface shape of the reflective surface middle lobe 2 is calibrated. The above precision measurement data is collected and called by the data acquisition and control system 26;

[0041] Step 2: Install the upper lobe 4, the lower lobe 5, the left lobe 6, the right lobe 7, the upper lobe adjustable support device 8, the lower lobe adjustable support device 9, the left lobe adjustable support device 10, and the right lobe adjustable support device 11 of the reflecting surface respectively on the corresponding first Stewart platform 12, the second Stewart platform 13, the third Stewart platform 14, and the fourth Stewart platform 15. The first Stewart platform 12, the second Stewart platform 13, the third Stewart platform 14, and the fourth Stewart platform 15 have a moving function, and move the above-mentioned assembly to the initial splicing position planned below the reflecting surface back frame 2 corresponding to the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface respectively;

[0042] Step 3: According to the theoretical model and the proposed initial splicing height, the required support heights of the upper lobe adjustable support device 8, the lower lobe adjustable support device 9, the left lobe adjustable support device 10, and the right lobe adjustable support device 11 of the reflecting surface are analyzed and adjusted to their proper positions, and the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface are hoisted and installed to the upper lobe adjustable support device 8, the lower lobe adjustable support device 9, and the left lobe adjustable support device 11 of the reflecting surface respectively. 0, on the upper lobe adjustable support device 11 of the reflecting surface right lobe, the laser radar 20 is used to measure the surface accuracy of the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface respectively, and the upper lobe adjustable support device 8, the lower lobe adjustable support device 9, the left lobe adjustable support device 10, and the right lobe adjustable support device 11 of the reflecting surface are fine-tuned according to the measurement results to ensure the surface accuracy of the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface, and eliminate the influence of gravity deformation;

[0043] Step 4: Feature points for precision measurement are set on the first Stewart platform 12, the second Stewart platform 13, the third Stewart platform 14, and the fourth Stewart platform 15, and feature points for precision measurement and calibration are set on the side and back of the non-coated surface areas such as the lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 on the reflecting surface. The first laser tracker 21, the second laser tracker 22, the third laser tracker 23, and the fourth laser tracker 24 form a multilateral measurement system to measure the first Stewart platform 12 and the lobe 4, the second Stewart platform 14, and the right lobe 7 on the reflecting surface. The relative position relationship between the Stewart platform 13 and the lower lobe 5 of the reflecting surface, the third Stewart platform 14 and the left lobe 6 of the reflecting surface, and the fourth Stewart platform 15 and the right lobe 7 of the reflecting surface; the precision measurement system established by the laser radar 20 and the first laser tracker 21, the second laser tracker 22, the third laser tracker 23, and the fourth laser tracker 24, precisely measures the feature points and surface shapes of the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface, and calibrates the relationship between the feature points of each lobe and the surface shape of each lobe, and the above precision measurement data is collected and called by the data acquisition and control system 26;

[0044] Step 5: The gap and height difference between the upper lobe 4, the lower lobe 5, the left lobe 6, the right lobe 7 and the middle lobe 3 on the reflecting surface are measured by the face difference meter 25 respectively. The difference data of the seam are collected and called by the data acquisition and control system 26. Then, according to the precise measurement data in step 1 and step 4 combined with the theoretical value of the numerical model, the position adjustment amount of the upper lobe 4, the lower lobe 5, the left lobe 6 and the right lobe 7 on the reflecting surface corresponding to the coordinate system of the first Stewart platform 12, the second Stewart platform 13, the third Stewart platform 14 and the fourth Stewart platform 15 is calculated by the data acquisition and control system 26. The data acquisition and control system 26 drives and controls the first Stewart platform 12, the second Stewart platform 13, the third Stewart platform 14 and the fourth Stewart platform 15. The platform 12, the second Stewart platform 13, the third Stewart platform 14, and the fourth Stewart platform 15 drive the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface to adjust the position of each spliced ​​lobe of the reflecting surface by using an adjustment strategy of first rotating and then translating. During the adjustment process, anti-collision monitoring is performed by the reflecting surface lobe splicing laser ranging sensor 16 installed on the back of the upper lobe, the reflecting surface lower lobe splicing laser ranging sensor 17 installed on the back of the lower lobe, the reflecting surface left lobe splicing laser ranging sensor 18 installed on the back of the left lobe, and the reflecting surface right lobe splicing laser ranging sensor 19 installed on the back of the right lobe. The data acquisition and control system 26 sets an alarm value to avoid collision during the adjustment process.

[0045] Step 6: After the posture adjustment of the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface is completed, the laser radar 20 is used to measure the surface shape of the reflecting surface after splicing. If the required surface accuracy is not achieved, the first laser tracker 21, the second laser tracker 22, the third laser tracker 23, and the fourth laser tracker 24 are used to accurately measure the feature points of the upper lobe 4, the lower lobe 5, the left lobe 6, and the right lobe 7 of the reflecting surface, and then step 5 is repeated. A closed loop is performed through posture adjustment, accuracy measurement, and software solution, and multiple iterations are performed to gradually approximate until the surface shape meets the splicing installation accuracy requirements;

[0046] Step 7: After the reflective surface shape reaches the splicing installation accuracy requirements, the reflective surface upper lobe 4, the reflective surface lower lobe 5, the reflective surface left lobe 6, and the reflective surface right lobe 7 are respectively installed on the reflective surface back frame 2, and then the supporting heights of the reflective surface upper lobe adjustable support device 8, the reflective surface lower lobe adjustable support device 9, the reflective surface left lobe adjustable support device 10, and the reflective surface right lobe adjustable support device 11 are respectively lowered to below the reflective surface back frame 2, and the first Stewart platform 12, the second Stewart platform 13, the third Stewart platform 14, and the fourth Stewart platform 15 respectively carry the reflective surface upper lobe adjustable support device 8, the reflective surface lower lobe adjustable support device 9, the reflective surface left lobe adjustable support device 10, and the reflective surface right lobe adjustable support device 11 away from the reflective surface back frame 2, completing the withdrawal of the adjustment device and equipment.

[0047] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A method for assembling and adjusting a large-caliber spliced ​​reflective surface, characterized in that: include: Step S1: constructing a precision measurement system based on laser radar, multiple laser trackers and a surface difference meter; Step S2: installing the middle lobe of the reflective surface on a reflective surface back frame, wherein the reflective surface back frame is installed on a load parking frame; Step S3: The upper lobe adjustable support device of the reflecting surface, the lower lobe adjustable support device of the reflecting surface, the left lobe adjustable support device of the reflecting surface, and the right lobe adjustable support device of the reflecting surface are respectively installed on corresponding Stewart platforms, and the upper lobe adjustable support device of the reflecting surface, the lower lobe adjustable support device of the reflecting surface, the left lobe adjustable support device of the reflecting surface, and the right lobe adjustable support device of the reflecting surface are respectively moved to initial splicing positions using the Stewart platforms; Step S4: respectively adjust the heights of the upper lobe adjustable support device of the reflecting surface, the lower lobe adjustable support device of the reflecting surface, the left lobe adjustable support device of the reflecting surface, and the right lobe adjustable support device of the reflecting surface to the initial splicing height, and respectively install the upper lobe, lower lobe, left lobe, and right lobe of the reflecting surface on the upper lobe adjustable support device, the lower lobe adjustable support device, the left lobe adjustable support device, and the right lobe adjustable support device of the reflecting surface; Step S5: Based on the precise measurement system, the splicing process is measured to obtain precise measurement data, and the precise measurement data is transmitted to the data acquisition and control system. The data acquisition and control system drives the corresponding Stewart platform to adjust the splicing reflection surface according to the preset requirements, and repeatedly triggers step S5 until the measurement result meets the preset requirements; Step S6: Install the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface to the reflecting surface back frame respectively, withdraw the upper lobe adjustable support device, lower lobe adjustable support device, left lobe adjustable support device and right lobe adjustable support device of the reflecting surface, and withdraw the Stewart platform.

2. The large-diameter splicing reflective surface splicing and adjustment method according to claim 1 is characterized in that: The step S4 includes: when the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface are respectively installed on the upper lobe adjustable support device, the lower lobe adjustable support device, the left lobe adjustable support device and the right lobe adjustable support device of the reflecting surface, the surface accuracy of the upper lobe, the lower lobe, the left lobe and the right lobe of the reflecting surface are measured by laser radar, and the upper lobe adjustable support device, the lower lobe adjustable support device, the left lobe adjustable support device and the right lobe adjustable support device of the reflecting surface are fine-tuned to make the surface accuracy of the upper lobe, the lower lobe, the left lobe and the right lobe of the reflecting surface meet the preset requirements and eliminate the influence of gravity deformation.

3. The large-diameter splicing reflective surface splicing and adjustment method according to claim 1 is characterized in that: The step S5 comprises: Step S5.1: setting calibration feature points on the mid-lobe of the reflection surface, and calibrating the relationship between the mid-lobe feature points and the surface shape of the reflection surface by using a laser radar and a laser tracker; Step S5.2: Set precise measurement feature points on each Stewart platform, set calibration feature points on the upper lobe, lower lobe, left lobe and right lobe of the reflector surface, and use multiple laser trackers to form a multilateral measurement system to measure the relative position relationship between each Stewart platform and the upper lobe, lower lobe, left lobe and right lobe of the reflector surface. Use laser radar and laser tracker to calibrate the relationship between the upper lobe, lower lobe, left lobe and right lobe of the reflector surface and the surface shape; Step S5.3: Use multiple laser trackers to measure the calibrated feature points of the middle lobe of the reflector and the upper lobe, lower lobe, left lobe and right lobe of the reflector. Based on the relationship between the calibrated feature points and the surface shape and the relative posture relationship between the Stewart platform and the upper lobe, lower lobe, left lobe and right lobe of the reflector, use a surface difference meter to measure the gap and height difference between the upper lobe, lower lobe, left lobe, right lobe and the middle lobe of the reflector to obtain precise measurement data. Step S5.4: transmitting the precise measurement data to a data acquisition and control system, wherein the data acquisition and control system calculates the posture adjustment values ​​of the upper lobe, the lower lobe, the left lobe, and the right lobe of the reflective surface in the Stewart platform coordinate system based on the precise measurement data and the numerical model theoretical value; Step S5.5: drive and control the Stewart platform to adjust the position of the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface.

4. The large-diameter splicing reflective surface splicing and adjustment method according to claim 3 is characterized in that: The step S5.1 comprises: setting feature points for precise measurement and calibration in the non-coated surface area including the side and back of the lobe in the reflective surface.

5. The large-diameter splicing reflective surface splicing and adjustment method according to claim 3 is characterized in that: The step S5.2 includes: setting feature points for precise measurement and calibration in the non-coated surface areas including the side edges and back sides of the upper lobe, the lower lobe, the left lobe and the right lobe of the reflecting surface.

6. The large-diameter splicing reflective surface splicing and adjustment method according to claim 3 is characterized in that: The step S5.5 includes: driving and controlling the Stewart platform to drive the upper lobe, the lower lobe, the left lobe and the right lobe of the reflecting surface to adjust their positions respectively by first rotating and then translating.

7. The large-diameter splicing reflective surface splicing and adjustment method according to claim 1 is characterized in that: During the posture adjustment process, the upper lobe splicing laser ranging sensor and the lower lobe splicing laser ranging sensor installed on the back of the reflecting surface; the left lobe splicing laser ranging sensor and the right lobe splicing laser ranging sensor of the reflecting surface are used for anti-collision monitoring.

8. The large-diameter splicing reflective surface splicing and adjustment method according to claim 1 is characterized in that: The step S6 includes: installing the upper lobe, lower lobe, left lobe and right lobe of the reflecting surface on the reflecting surface back frame respectively, and then lowering the support heights of the upper lobe adjustable support device, the lower lobe adjustable support device, the left lobe adjustable support device and the right lobe adjustable support device of the reflecting surface to below the reflecting surface back frame respectively; the Stewart platform carries the upper lobe adjustable support device, the lower lobe adjustable support device, the left lobe adjustable support device and the right lobe adjustable support device of the reflecting surface away from the reflecting surface back frame respectively, and completes the withdrawal of the adjustment device and equipment.

9. A large-caliber spliced ​​reflective surface, characterized in that: It is obtained by using the large-diameter spliced ​​reflective surface splicing and adjustment method described in any one of claims 1 to 8.

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