360-degree azimuth angle fast reflector applied to free space optical communication

Abstract

The invention relates to the technical field of spaceflight optical communication, and particularly discloses a 360-degree azimuth angle fast reflecting mirror applied to free space optical communication, which comprises a large pitch angle double-shaft fast reflecting mirror, an azimuth self-locking rotating base and a controller, the large-pitch-angle double-axis fast reflecting mirror is installed on the azimuth self-locking rotating base, the controller is electrically connected with the large-pitch-angle double-axis fast reflecting mirror and the azimuth self-locking rotating base, and the controller controls the azimuth self-locking rotating base and the azimuth axis of the large-pitch-angle double-axis fast reflecting mirror to be matched to achieve integrated control over coarse adjustment and fine adjustment of the azimuth axis. The large-pitch-angle double-axis fast reflecting mirror independently realizes high-precision adjustment of a pitch axis; the fast reflecting mirror is of an integrated structure, external light path fusion is not needed, 360-degree large-range adjustment of the azimuth axis is achieved through the azimuth self-locking rotating base, and large-angle high-precision adjustment of the pitch axis and fine adjustment of the azimuth axis are achieved through the large-pitch-angle double-axis fast reflecting mirror.

Description

Technical Field

[0001] This invention relates to the field of aerospace optical communication technology, and in particular to a 360° azimuth fast reflector for use in free space optical communication. Background Technology

[0002] As a core component for beam aiming and deflection control in free-space optical communication, a fast reflector typically consists of a structural body, a flexible support mechanism, a driving voice coil motor, and a two-dimensional high-precision angle measurement system. The voice coil motor provides driving power, and the angle measurement device provides feedback on the deflection angle information. Together with the servo control circuit, they form a closed-loop servo system to achieve high-precision beam adjustment.

[0003] In practical applications, traditional biaxial fast reflectors are limited by their inherent mechanism, with angular movement range controlled only between ±1.5° and ±2°. Expanding this range requires significantly increasing the air gap of the voice coil motor, which severely reduces the fast reflector's bandwidth and efficiency, making it difficult to balance adjustment range and device performance. To meet the practical needs of free-space optical communication terminals for large-angle beam aiming adjustment, the industry commonly employs a coarse-fine combined system. This system integrates the fast reflector with a traditional biaxial servo mechanism via optical path fusion, allowing the biaxial servo mechanism to perform coarse adjustment and the fast reflector to perform fine adjustment, thereby expanding the overall angular adjustment range.

[0004] However, this coarse-fine combined aiming structure has many inherent defects: First, the system requires a dual-axis servo mechanism and a dual-axis fast reflector, and a specially designed rear optical path is needed to achieve optical path fusion between the two, resulting in a large and complex overall device that cannot meet the installation requirements of miniaturized free-space optical communication terminals; Second, the dual-mechanism design significantly increases the production and assembly costs of the device, which does not meet the research and development and application requirements of low-cost terminals; Third, the coarse and fine adjustment mechanisms need to be controlled independently and cooperate with each other, which increases the design difficulty of the servo control circuit and the complexity of system control, and is prone to problems such as control delay and coordination error, affecting the accuracy and efficiency of beam aiming.

[0005] At the same time, although a simple biaxial fast reflector has the advantages of small size, light weight, simple control and low cost, and can meet the basic requirements of miniaturized terminals, its limited angular motion range is far from meeting the actual use needs of free space optical communication terminals, and it cannot be used as a core device for beam aiming alone.

[0006] In summary, neither existing coarse-precision combined aiming systems nor single dual-axis fast reflectors can simultaneously meet the comprehensive requirements of miniaturized, low-cost free-space optical communication terminals for beam aiming devices, which include a wide angle adjustment range, high-precision control, compact structure, simple control, and low cost. This has become a key technological bottleneck restricting the research and development and promotion of miniaturized free-space optical communication terminals, and a new fast reflector structure and control scheme urgently need to be proposed to solve this problem. Summary of the Invention

[0007] To address the issue that fast reflectors cannot simultaneously meet the comprehensive requirements of miniaturized, low-cost free-space optical communication terminals for a wide-angle adjustment range, high-precision control, compact structure, simple control, and low cost in beam aiming devices, this application provides a 360° azimuth fast reflector for free-space optical communication.

[0008] The 360° azimuth fast reflector for free-space optical communication provided in this application adopts the following technical solution: A 360° azimuth fast reflector for free-space optical communication includes a large elevation angle dual-axis fast reflector, an azimuth self-locking rotating base, and a controller. The large elevation angle dual-axis fast reflector is mounted on the azimuth self-locking rotating base. The controller is electrically connected to both the large elevation angle dual-axis fast reflector and the azimuth self-locking rotating base. The controller controls the azimuth axis of the azimuth self-locking rotating base to cooperate with the azimuth axis of the large elevation angle dual-axis fast reflector to achieve integrated coarse and fine adjustment of the azimuth axis. The large elevation angle dual-axis fast reflector independently achieves high-precision adjustment of the elevation axis. This fast reflector is an integrated structure that does not require external optical path fusion. It achieves a 360° wide-range azimuth axis adjustment through the azimuth self-locking rotating base and achieves large-angle high-precision adjustment of the elevation axis and fine adjustment of the azimuth axis through the large elevation angle dual-axis fast reflector.

[0009] Optionally, the azimuth self-locking rotating base includes an azimuth hollow self-locking motor, an azimuth bearing, and an azimuth axis hollow encoder. The azimuth hollow self-locking motor includes a rotor and a stator base. The azimuth bearing is disposed between the rotor and the stator base. The large pitch angle dual-axis fast reflector is fixedly connected to the rotor. The rotor of the azimuth axis hollow encoder is connected to the rotor of the azimuth hollow self-locking motor. The reading head of the azimuth axis hollow encoder is connected to the stator base of the azimuth hollow self-locking motor. The azimuth axis hollow encoder and the azimuth hollow self-locking motor cooperate to form an azimuth axis closed-loop control system.

[0010] Optionally, the large pitch angle dual-axis fast reflector includes a fast reflector body, a oscillating body, a load reflector, an arc voice coil motor assembly, and an eddy current sensor assembly. The load reflector is fixed on the upper surface of the oscillating body, and the oscillating body is rotatably connected to the fast reflector body via a flexible shaft. The arc voice coil motor assembly is located between the oscillating body and the fast reflector body and drives the oscillating body to deflect. The eddy current sensor assembly is respectively located on the fast reflector body and the oscillating body and is used to detect the deflection of the pitch axis and azimuth axis of the large pitch angle dual-axis fast reflector.

[0011] Optionally, the arc-shaped voice coil motor assembly includes an arc-shaped voice coil motor magnet and a voice coil motor coil. The arc-shaped voice coil motor magnet is symmetrically distributed at a position where the azimuth axis and pitch axis are at 45°. The pitch axis deflection range of the large pitch angle dual-axis fast-reflecting mirror is ≥±15°, and the bandwidth and working efficiency of the arc-shaped voice coil motor assembly are not affected by the large pitch axis deflection.

[0012] Optionally, the eddy current sensor assembly includes an eddy current sensor probe and an eddy current probe reference surface. The eddy current probe reference surface is located on the back of the oscillating body, and the eddy current sensor probe is mounted on the fast-reflecting mirror body and corresponds to the position of the eddy current probe reference surface. The eddy current sensor probes are divided into two groups. The first group of eddy current sensor probes is located on the azimuth axis and symmetrically distributed on both sides of the pitch axis, and is used to measure the pitch axis deflection. The second group of eddy current sensor probes is located on the pitch axis and symmetrically distributed on both sides of the azimuth axis, and is used to measure the azimuth axis deflection.

[0013] Optionally, a switch is also included. The output terminal of the controller is electrically connected to the input terminal of the switch. The two output terminals of the switch are respectively electrically connected to the azimuth axis of the large pitch angle dual-axis fast-reflecting mirror and the azimuth hollow self-locking motor of the azimuth self-locking rotating base. The controller realizes the control switching between coarse and fine adjustment of the azimuth axis through the switch.

[0014] Optionally, the controller employs segmented coarse and fine adjustment control for the azimuth axis. The control logic is as follows: when the commanded angle exceeds the adjustment range of the azimuth axis of the large pitch angle dual-axis quick-reflecting mirror, the controller controls the azimuth hollow self-locking motor to work through a switching switch, coarsely adjusting the azimuth axis to the commanded position; after the azimuth axis is coarsely adjusted to the desired position, the controller switches to the azimuth axis of the large pitch angle dual-axis quick-reflecting mirror through a switching switch, controlling it to complete the fine adjustment and aiming of the azimuth axis.

[0015] Optionally, when the switch is switched to the azimuth axis of the large pitch angle dual-axis fast reflector for fine adjustment, the azimuth hollow self-locking motor shuts down the power amplifier and enters a self-locking state, providing a stable support base for the large pitch angle dual-axis fast reflector and reducing system energy consumption.

[0016] Optionally, the azimuth self-locking rotating base has two working modes: stepping and continuous constant speed. These modes work in conjunction with the large pitch angle dual-axis fast-reflecting mirror to achieve target search. In stepping mode, the azimuth self-locking motor steps and then locks itself. The pitch axis of the large pitch angle dual-axis fast-reflecting mirror is linked with the azimuth axis to complete a rapid scan within its own angle range, repeatedly stepping and scanning until a target is found or a 360° rotation is completed. In continuous constant speed mode, the azimuth self-locking motor rotates continuously at a constant speed as a slow axis, while the pitch axis of the large pitch angle dual-axis fast-reflecting mirror performs a high-speed scan as a fast axis. The combination of fast and slow axes achieves efficient target scanning.

[0017] Optionally, it also includes a quick-reflecting mirror fixing screw, wherein the large pitch angle dual-axis quick-reflecting mirror is detachably and fixedly connected to the azimuth self-locking rotating base hollow self-locking motor rotor by the quick-reflecting mirror fixing screw.

[0018] In summary, this application includes at least one of the following beneficial technical effects: The 360° azimuth fast reflector is an integrated structure that can achieve most of the functions that traditional aiming mechanisms require coarse-fine combination and subsequent optical path without the need for external optical path coarse-fine combination. It effectively solves the problems of large size, high cost, complex control and inability to match miniaturized free space optical communication terminals of traditional coarse-fine combination aiming structures. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the fast-reflecting mirror according to an embodiment of this application; Figure 2 This is an exploded structural diagram of the fast reflector according to an embodiment of this application; Figure 3 This is a schematic diagram of the exploded structure of the fast reflector according to another perspective of the present application embodiment; Figure 4 This is a cross-sectional structural diagram of the fast-reflecting mirror body according to an embodiment of this application; Figure 5 This is the positional arrangement of the voice coil motor and the eddy current probe in this application (view from the front of the fast-reflecting mirror). Figure 6 This is a schematic diagram of the controller controlling the fast reflector in this application.

[0020] Explanation of reference numerals in the attached figures: 1. Fast-reflecting mirror fixing screws; 2. Large pitch angle dual-axis fast-reflecting mirror; 21. Load reflector; 22. Swing body; 221. Flexible shaft; 23. Eddy current sensor probe; 231 / 232 / 233 / 234. Eddy current sensor probe unit; 24. Voice coil motor coil; 25. Arc-shaped voice coil motor magnet; 251 / 252 / 253 / 254. Arc-shaped voice coil motor magnet unit; 26. Fast-reflecting mirror body; 27. Eddy current probe reference surface; 3. Azimuth hollow self-locking motor rotor; 4. Azimuth bearing; 5. Azimuth hollow self-locking motor stator base; 6. Azimuth axis hollow encoder; 7. Controller; 8. Fast-reflecting mirror pitch axis; 9. Fast-reflecting mirror azimuth axis; 10. Azimuth hollow self-locking motor; 11. Switch. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0022] This embodiment provides a 360° azimuth fast reflector for free-space optical communication, such as... Figure 1-6 As shown, the fast reflector is an integrated structure that does not require external optical paths for coarse-fine fusion. The fast reflector includes a large pitch angle dual-axis fast reflector 2, an azimuth hollow self-locking motor rotor 3, an azimuth bearing 4, an azimuth hollow self-locking motor stator base 5, an azimuth axis hollow encoder 6, a controller 7, and a switch 11. The large pitch angle dual-axis fast reflector 2 is connected to the azimuth hollow self-locking motor rotor 3 through fast reflector fixing screws 1. The controller 7 is electrically connected to the pitch axis 8 of the fast reflector, and the controller 7 is electrically connected to the azimuth axis 9 and the azimuth hollow self-locking motor 10 of the fast reflector through the switch 11. Through coordinated control, the coarse and fine adjustment of the 360° azimuth angle and the large-angle high-precision adjustment of the pitch axis are achieved.

[0023] The large pitch angle dual-axis fast-reflecting mirror 2 is the core fine-tuning and pitch axis adjustment component of the device, including a load reflector 21, a swing body 22, an eddy current sensor probe 23, a voice coil motor coil 24, an arc-shaped voice coil motor magnet 25, and a fast-reflecting mirror body 26. The load reflector 21 is bonded to the upper surface of the swing body 22, and the swing body 22 is connected to the fast-reflecting mirror body 26 through a flexible shaft 221. The eddy current sensor probe 23 is installed inside the fast-reflecting mirror body 26, and an eddy current probe reference surface 27 is provided on the back of the swing body 22, and the eddy current probe reference surface 27 is located directly above the eddy current sensor probe 23. The arc-shaped voice coil motor magnet 25 is fixed to the back of the swing body 22, wherein the arc-shaped voice coil motor magnet individual units 252 and 253 form a group, and the arc-shaped voice coil motor magnet individual units 251 and 253 form a group. The iron unit 254 forms a group, and two sets of arc-shaped voice coil motor magnets 25 are symmetrically distributed at a 45° angle between the azimuth and pitch axes. The voice coil motor coil 24 and the arc-shaped voice coil motor magnets 25 cooperate to form a drive assembly, realizing the deflection drive of the large pitch angle dual-axis fast reflector 2. The pitch axis deflection range of the fast reflector is ≥±15°, and the bandwidth and working efficiency of the voice coil motor are not sacrificed within this deflection range. The eddy current sensor probe 23 has a total of four probe units. Eddy current sensor probe units 231 and 232 form a group, located on the azimuth axis and symmetrically distributed on both sides of the pitch axis, used to measure the pitch axis deflection. Eddy current sensor probe units 233 and 234 form a group, located on the pitch axis and symmetrically distributed on both sides of the azimuth axis, used to measure the azimuth axis deflection.

[0024] The azimuth hollow self-locking motor rotor 3, azimuth bearing 4, azimuth hollow self-locking motor stator base 5, azimuth shaft hollow encoder 6, and azimuth hollow self-locking motor 10 together form an azimuth self-locking rotating base, providing support for the large pitch angle dual-axis fast-reflecting mirror 2 and enabling 360° large-range coarse adjustment of the azimuth axis; the azimuth bearing 4 is located between the azimuth hollow self-locking motor rotor 3 and the azimuth hollow self-locking motor stator base 5, realizing the relative rotation between the two; the rotor of the azimuth shaft hollow encoder 6 and the azimuth hollow self-locking motor 10... The rotor 3 of the self-locking motor is connected to the azimuth axis. The reading head of the hollow encoder 6 of the azimuth axis is connected to the stator base 5 of the hollow self-locking motor of the azimuth axis. The two work together to form a closed-loop control system for the azimuth axis, providing angle feedback for coarse adjustment of the azimuth axis. The large pitch angle dual-axis fast-reflecting mirror 2 is connected to the rotor 3 of the hollow self-locking motor of the azimuth axis. With the rotation of the rotor, the overall azimuth is coarsely adjusted. The rotation output of the azimuth axis 9 of the fast-reflecting mirror and the rotation output of the hollow self-locking motor of the azimuth axis 10 are combined through the shaft system relationship to form the final output of the system azimuth axis.

[0025] The controller 7 is the core control unit of the device. It is electrically connected to the pitch axis 8 of the fast-reflecting mirror and can directly output control signals to achieve independent adjustment of the pitch axis. The output terminal of the controller 7 is electrically connected to the input terminal of the switch 11. The two output terminals of the switch 11 are electrically connected to the azimuth axis 9 of the fast-reflecting mirror and the azimuth hollow self-locking motor 10, respectively. The switch 11 enables the controller 7 to switch the control path of the azimuth axis 9 and the azimuth hollow self-locking motor 10, thereby realizing the orderly connection between coarse and fine adjustment of the azimuth axis. The signal output terminals of the eddy current sensor probe 23 and the azimuth axis hollow encoder 6 are both connected to the signal acquisition terminal of the controller 7, providing the controller 7 with real-time angle deflection feedback signals to form a closed-loop control.

[0026] After receiving the external pitch angle command, the controller 7 directly outputs a control signal to the pitch axis 8 of the fast-reflecting mirror, driving the arc voice coil motor assembly to work and causing the swing body 22 to deflect around the pitch axis; the probe group in the eddy current sensor probe 23 that measures the pitch axis deflection detects the deflection in real time and transmits the feedback signal to the controller 7. The controller 7 adjusts the control command in real time according to the feedback signal to achieve high-precision closed-loop adjustment within the pitch axis range of ≥±15°.

[0027] After receiving the external azimuth angle command, the controller 7 first determines whether the commanded angle exceeds the adjustment range of the quick-reflective mirror azimuth axis 9: ① If the command angle exceeds the adjustment range of the azimuth axis 9 of the fast-reflecting mirror, the controller 7 controls the switch 11 to switch to the azimuth hollow self-locking motor 10 side, drives the azimuth hollow self-locking motor 10 to work, drives the large pitch angle dual-axis fast-reflecting mirror 2 to rotate as a whole, and realizes a large range of coarse adjustment of the azimuth axis. During this process, the azimuth axis hollow encoder 6 detects the rotation angle in real time and feeds it back to the controller 7 to ensure the accuracy of the coarse adjustment position; ② After the azimuth hollow self-locking motor 10 coarsely adjusts the azimuth axis to the command position, the controller 7 controls the switch 11 to switch to the azimuth axis 9 side of the fast-reflecting mirror. At the same time, the controller controls the azimuth hollow self-locking motor 10 to turn off the power amplifier and put it in a self-locking state, providing a stable base for the operation of the large pitch angle dual-axis fast-reflecting mirror 2, while reducing system energy consumption. The controller 7 outputs a control signal to the azimuth axis 9 of the fast-reflecting mirror to drive it to complete the micro-arc level fine-tuning aiming of the azimuth axis, and finally achieves high-precision positioning within the 360° azimuth angle range.

[0028] When the device is in the target search state of free space optical communication, the azimuth hollow self-locking motor 10 can be switched to stepping mode or continuous uniform speed rotation mode by the controller 7, and in conjunction with the large elevation angle dual-axis fast-reflecting mirror 2, it can achieve efficient scanning search: ①Stepping mode: The azimuth hollow self-locking motor 10 operates in stepping mode, driving the large pitch angle dual-axis fast-reflecting mirror 2 to complete one step and then lock itself. At this time, the controller 7 controls the fast-reflecting mirror pitch axis 8 and fast-reflecting mirror azimuth axis 9 to work together to complete a fast scan search within the angle range of the fast-reflecting mirror. After a single scan is completed, the azimuth hollow self-locking motor 10 continues to step one step and locks itself. The large pitch angle dual-axis fast-reflecting mirror 2 scans again. This operation is repeated until the target is found or the azimuth hollow self-locking motor 10 completes the entire 360° rotation. ② Continuous uniform speed rotation mode: The azimuth hollow self-locking motor 10 operates in continuous uniform speed rotation mode, which serves as the slow axis for scanning and drives the large pitch angle dual-axis fast-reflecting mirror 2 to rotate 360° continuously; at the same time, the controller 7 controls the pitch axis 8 of the fast-reflecting mirror as the fast axis for scanning to perform high-speed scanning. Through the combination of fast and slow axes, a more efficient and faster target scanning search is achieved.

[0029] The 360° azimuth fast reflector in this embodiment is an integrated structure that can achieve most of the functions that traditional aiming mechanisms require coarse-fine combination plus a rear optical path without the need for external optical path coarse-fine combination. It effectively solves the problems of large size, high cost, and complex control of traditional coarse-fine combination aiming structures, which cannot be matched with miniaturized free space optical communication terminals.

[0030] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A 360° azimuth fast reflector for free-space optical communication, characterized in that, The system includes a large pitch angle dual-axis fast reflector (2), an azimuth self-locking rotating base, and a controller (7). The large pitch angle dual-axis fast reflector (2) is mounted on the azimuth self-locking rotating base. The controller (7) is electrically connected to the large pitch angle dual-axis fast reflector (2) and the azimuth self-locking rotating base, respectively. The controller (7) controls the azimuth axis of the azimuth self-locking rotating base and the large pitch angle dual-axis fast reflector (2) to achieve integrated coarse and fine adjustment of the azimuth axis. The large pitch angle dual-axis fast reflector (2) independently achieves high-precision adjustment of the pitch axis. The fast reflector is an integrated structure that does not require external optical path fusion. The azimuth axis can be adjusted over a 360° range through the azimuth self-locking rotating base. The large pitch angle dual-axis fast reflector (2) achieves high-precision adjustment of the pitch axis and fine adjustment of the azimuth axis.

2. The 360° azimuth fast-reflecting mirror according to claim 1, characterized in that, The azimuth self-locking rotating base includes an azimuth hollow self-locking motor (10), an azimuth bearing (4), and an azimuth axis hollow encoder (6). The azimuth hollow self-locking motor (10) includes a rotor and a stator base. The azimuth bearing (4) is disposed between the rotor and the stator base. The large pitch angle dual-axis fast-reflecting mirror (2) is fixedly connected to the rotor. The rotor of the azimuth axis hollow encoder (6) is connected to the rotor of the azimuth hollow self-locking motor (10). The reading head of the azimuth axis hollow encoder (6) is connected to the stator base of the azimuth hollow self-locking motor (10). The azimuth axis hollow encoder (6) and the azimuth hollow self-locking motor (10) cooperate to form an azimuth axis closed-loop control system.

3. The 360° azimuth fast-reflecting mirror according to claim 1, characterized in that, The large pitch angle dual-axis fast reflector (2) includes a fast reflector body (26), a swing body (22), a load reflector (21), an arc voice coil motor assembly, and an eddy current sensor assembly. The load reflector (21) is fixed on the upper surface of the swing body (22). The swing body (22) is rotatably connected to the fast reflector body (26) through a flexible shaft (221). The arc voice coil motor assembly is located between the swing body (22) and the fast reflector body (26) and drives the swing body (22) to deflect. The eddy current sensor assembly is located on the fast reflector body (26) and the swing body (22) respectively, and is used to detect the deflection of the pitch axis and azimuth axis of the large pitch angle dual-axis fast reflector (2).

4. The 360° azimuth fast-reflecting mirror according to claim 3, characterized in that, The arc-shaped voice coil motor assembly includes an arc-shaped voice coil motor magnet (25) and a voice coil motor coil (24). The arc-shaped voice coil motor magnet (25) is symmetrically distributed at a position where the azimuth axis and the pitch axis are at 45°. The pitch axis deflection range of the large pitch angle dual-axis fast-reflecting mirror (2) is ≥ ±15°, and the bandwidth and working efficiency of the arc-shaped voice coil motor assembly are not affected by the large pitch axis deflection.

5. The 360° azimuth fast-reflecting mirror according to claim 3, characterized in that, The eddy current sensor assembly includes an eddy current sensor probe (23) and an eddy current probe reference surface (27). The eddy current probe reference surface (27) is located on the back of the oscillating body (22). The eddy current sensor probe (23) is mounted on the fast-reflecting mirror body (26) and corresponds to the position of the eddy current probe reference surface (27). The eddy current sensor probe (23) is divided into two groups. The first group of eddy current sensor probes (23) is located on the azimuth axis and symmetrically distributed on both sides of the pitch axis, and is used to measure the deflection of the pitch axis. The second group of eddy current sensor probes (23) is located on the pitch axis and symmetrically distributed on both sides of the azimuth axis, and is used to measure the deflection of the azimuth axis.

6. The 360° azimuth fast-reflecting mirror according to claim 1, characterized in that, It also includes a switch (11). The output end of the controller (7) is electrically connected to the input end of the switch (11). The two output ends of the switch (11) are electrically connected to the azimuth axis of the large pitch angle dual-axis fast-reflecting mirror (2) and the azimuth hollow self-locking motor (10) of the azimuth self-locking rotating base, respectively. The controller (7) realizes the control switching between coarse and fine adjustment of the azimuth axis through the switch (11).

7. The 360° azimuth fast-reflecting mirror according to claim 6, characterized in that, The controller (7) adopts segmented coarse and fine adjustment control for the azimuth axis. The control logic is as follows: when the command angle exceeds the adjustment range of the azimuth axis of the large pitch angle dual-axis quick-reflection mirror (2), the controller (7) controls the azimuth hollow self-locking motor (10) to work through the switching switch (11) to coarsely adjust the azimuth axis to the command position; when the azimuth axis is coarsely adjusted to the command position, the controller (7) switches to the azimuth axis of the large pitch angle dual-axis quick-reflection mirror (2) through the switching switch (11) to control it to complete the fine adjustment and aiming of the azimuth axis.

8. The 360° azimuth fast-reflecting mirror according to claim 7, characterized in that, When the switch (11) is switched to the azimuth axis of the large pitch angle dual-axis fast mirror (2) for fine adjustment, the azimuth hollow self-locking motor (10) shuts down the power amplifier and is in a self-locking state, providing a stable support base for the large pitch angle dual-axis fast mirror (2) and reducing system energy consumption.

9. The 360° azimuth fast-reflecting mirror according to claim 1, characterized in that, The azimuth self-locking rotating base has two working modes: stepping and continuous constant speed. It works in conjunction with the large pitch angle dual-axis fast-reflecting mirror (2) to achieve target search. In stepping mode, the azimuth self-locking motor (10) steps and then locks itself. The pitch axis of the large pitch angle dual-axis fast-reflecting mirror (2) is linked with the azimuth axis to complete a rapid scan within its own angle range. The stepping scan is repeated until the target is found or a 360° rotation is completed. In continuous constant speed mode, the azimuth self-locking motor (10) rotates continuously at a constant speed as a slow axis. The pitch axis of the large pitch angle dual-axis fast-reflecting mirror (2) performs a high-speed scan as a fast axis. The fast and slow axes work together to achieve efficient target scanning.

10. The 360° azimuth fast-reflecting mirror according to any one of claims 1-9, characterized in that, It also includes a quick-reflecting mirror fixing screw (1), and the large pitch angle dual-axis quick-reflecting mirror (2) is detachably and fixedly connected to the azimuth self-locking motor (10) rotor (3) of the azimuth self-locking rotating base through the quick-reflecting mirror fixing screw (1).

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