CN110553124A - Two-stage composite single-reflector type mechanical tracking rotary table for laser communication - Google Patents
Two-stage composite single-reflector type mechanical tracking rotary table for laser communication Download PDFInfo
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- CN110553124A CN110553124A CN201810545214.5A CN201810545214A CN110553124A CN 110553124 A CN110553124 A CN 110553124A CN 201810545214 A CN201810545214 A CN 201810545214A CN 110553124 A CN110553124 A CN 110553124A
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- optical axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
- F16M11/12—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting in more than one direction
Abstract
The invention relates to a two-stage composite single-reflector type mechanical tracking rotary table for laser communication, and belongs to the field of space mechanisms. The high-precision optical axis tracking device is characterized in that the turntable adopts a coarse and fine two-stage adjusting mechanism to work in a combined mode to drive a reflector to realize large-range high-precision rotation, and the optical axis is aligned and tracked with high precision. The coarse adjustment mechanism adopts a low-precision self-locking transmission shaft system to realize the large-range adjustment of the lower precision of the reflector, and the shaft system can be self-locked. The fine adjustment mechanism adopts piezoelectric ceramics combined with a flexible hinge to realize the high-precision rotation of the reflector in a small range. The two-stage adjusting mechanism can be used for performing two-dimensional large-range high-precision adjustment on the optical axis in a combined operation mode, and the position precision of the optical axis can be guaranteed when the motor stops working. Meanwhile, the system coarse adjustment mechanism adopts a common motor to drive the shafting to rotate through the transmission mechanism, and a miniaturized motor can be adopted, so that the system has smaller weight and power consumption.
Description
Technical Field
The invention relates to a two-stage composite single-reflector type mechanical tracking rotary table for laser communication, and belongs to the field of space mechanisms.
Background
The laser communication has the advantages of high communication speed, strong anti-interference capability and the like, and has become a research hotspot in various countries. Because the divergence angle of the laser communication laser beam is small, the tracking unit is required to realize the high-precision alignment of the optical axes of the two communication parties. The tracking rotary table is a core component of the tracking and aiming unit, and the direction of an optical axis is adjusted through two-dimensional rotation of the rotary table, so that the alignment error of the optical axis meets certain precision requirements. The tracking rotary table generally requires a large working range while meeting a certain tracking precision, so that the mechanical rotary table is generally combined with a motor to directly drive a shaft system to realize large-range and high-precision rotation. Although the direct drive shafting of motor precision is high, the shafting itself does not possess self-locking function, and the motor needs to last work just can keep the shafting position, is unfavorable for reducing the consumption to the work occasion that does not need real-time tracking, and the higher high performance torque motor that need adopt of requirement to the motor simultaneously, and the motor volume weight is great is unfavorable for the system lightweight.
The invention provides a two-stage composite single-reflector type mechanical tracking rotary table for laser communication, which is characterized in that the rotary table adopts a coarse and fine two-stage adjusting mechanism with different working ranges and precisions to work compositely, the rotary table drives a reflector to rotate in two dimensions and high precision together, and communication laser realizes the adjustment of an optical axis through the reflection of the reflector to finish the alignment and tracking of the optical axis. The coarse adjustment mechanism adopts a low-precision self-locking transmission shaft system to drive the reflector to perform low-precision large-range adjustment, and meanwhile, the position of the self-locking motor of the shaft system can be kept unchanged after the power failure. The fine adjustment mechanism adopts piezoelectric ceramics combined with a flexible hinge to drive the reflector to rotate in a small range and high precision. The two-stage adjusting mechanism can be used for performing two-dimensional large-range high-precision adjustment on the optical axis in a combined operation mode, and the position precision of the optical axis can be guaranteed when the motor stops working. The requirement on the adjustment precision of the coarse adjustment mechanism is reduced, a common motor is adopted to drive the shafting to rotate through the transmission mechanism, a miniaturized low-performance motor can be adopted, and the coarse adjustment mechanism shafting is designed to have a self-locking function, so that the motor can stop working when the coarse adjustment mechanism is not adjusted, and the coarse adjustment mechanism is beneficial to reducing the weight and the power consumption of the system.
Disclosure of Invention
In order to meet the requirement of light and small tracking rotary table, the invention provides a two-stage composite single-reflector type mechanical tracking rotary table for laser communication, which comprises the following required equipment and implementation steps:
The rotary table is composed of an azimuth axis 1, a U-shaped frame 2, a reflector 3, piezoelectric ceramics 4, a back plate 5, a flexible hinge 6 and a pitching axis 7. The reflector 3 is installed on the back plate 5 through a flexible hinge 6, and one end of the piezoelectric ceramic 4 is connected with the back plate 5 while the other end is connected with the reflector 3. The system adopts three piezoelectric ceramics 4 which are arranged in a triangular mode by taking a flexible hinge 6 as a center, and the piezoelectric ceramics 4 can drive the reflector 3 to do two-dimensional rotation on the back plate 5 through the flexible hinge 6 in a stretching mode. The back plate 5 is connected to the U-shaped frame 2 through the pitching axis 7, and the back plate 5 can be driven by the pitching axis 7 to perform pitching rotation on the U-shaped frame 2. The U-shaped frame 2 is connected with the azimuth axis 1, and the azimuth axis 1 can drive the U-shaped frame 2 to rotate in azimuth. The reflector 3, the piezoelectric ceramics 4, the back plate 5 and the flexible hinge 6 form a fine adjusting mechanism, and the reflector 3 can be driven by the piezoelectric ceramics 4 to rotate on the back plate 5 in a small range and in a high-precision two-dimensional mode. The azimuth axis 1, the U-shaped frame 2 and the pitching axis 7 form a coarse adjusting mechanism, and the axis drives the fine adjusting mechanism to rotate in a low-precision two-dimensional mode in a large range by adopting a motor combined with a transmission mechanism such as a gear and the like to drive the axis to rotate. When the system is designed, the azimuth axis system 1 and the pitching axis system 7 have self-locking capability, and the position of the axis system can be ensured when the motor does not work, so that the working power consumption of the system is reduced. Meanwhile, the working range of the reflector 3 is larger than the shafting errors of the azimuth shafting 1 and the pitching shafting 7, so that the fine adjusting mechanism can compensate the shafting errors of the coarse adjusting mechanism, and high-precision adjustment is realized.
The implementation steps are as follows:
Step 1, when the system carries out optical axis pointing and does not need real-time tracking, a fine adjustment mechanism composed of a reflector 3, a piezoelectric ceramic 4, a back plate 5 and a flexible hinge 6 is driven by an azimuth axis system 1 and a pitching axis system 7 to carry out two-dimensional rotation for carrying out initial pointing. After the initial pointing is completed, the motors in the azimuth axis system 1 and the pitch axis system 7 are powered off to stop working, and the azimuth axis system 1 and the pitch axis system 7 are self-locked to keep the current positions.
And step 2, the piezoelectric ceramic 4 drives the reflector 3 to rotate in two dimensions, so that the initial pointing error is compensated, and high-precision pointing alignment is realized. The coarse and fine two-stage adjusting mechanism is matched to realize large-range high-precision pointing of the optical axis.
And 3, when the system performs real-time tracking, the piezoelectric ceramic 4 drives the reflector 3 to perform two-dimensional rotation to perform real-time high-precision tracking on the target. When the rotation angle of the reflector 3 is smaller than the working range, the azimuth axis system 1 and the pitch axis system 7 do not work, the current position is kept still by the self-locking capability of the reflector, and the reflector 3 is driven to track the target only by the piezoelectric ceramic 4.
And 4, when the rotation angle of the reflector 3 is close to the working range, the azimuth axis system 1 and the pitch axis system 7 rotate along with the reflector 3, so that the rotation range of the reflector 3 is enlarged. The coarse and fine two-stage adjusting mechanism performs combined work to realize large-range high-precision real-time tracking.
The large-range high-precision alignment and tracking of the optical axis can be realized through the steps.
The invention provides a two-stage composite single-reflector type mechanical tracking rotary table for laser communication, which comprises the following components: the coarse and fine two-stage adjusting mechanism is adopted to work in a combined mode to drive the reflector to rotate in two dimensions, and large-range high-precision alignment tracking of the optical axis is achieved. The shafting has self-locking capability, reduces the requirement on the motor, and can reduce the weight and the power consumption of the system.
Drawings
Fig. 1 is a composition diagram of a two-stage compound single-mirror mechanical tracking turntable for laser communication, in which: 1 is an azimuth axis system, 2 is a U-shaped frame, 3 is a reflector, 4 is piezoelectric ceramic, 5 is a back plate, 6 is a flexible hinge, and 7 is a pitching axis system.
Fig. 2 is a schematic diagram of a piezoelectric ceramic and flexible hinge arrangement.
Fig. 1 is also an explanatory abstract drawing.
Detailed Description
Taking a certain high-orbit satellite earth laser communication servo turntable as an example, the system comprises the following steps:
The rotary table is composed of an azimuth axis 1, a U-shaped frame 2, a reflector 3, piezoelectric ceramics 4, a back plate 5, a flexible hinge 6 and a pitching axis 7. The azimuth axis system 1 and the pitch axis system 7 are driven by a stepping motor and a gear, the axis system error is 0.6mrad and has self-locking capability, the working range of the azimuth axis system 1 is +/-160 degrees, and the working range of the pitch axis system 7 is +/-5 degrees. The two working ranges of the reflector 3 are all 1mrad, and the adjusting precision is 30 μ rad. The rotary table can realize high-precision alignment and tracking with the precision of 30 mu rad within the range of azimuth +/-160 DEG and pitching +/-5 deg.
Step 1, when the system carries out optical axis pointing and does not need real-time tracking, a fine adjustment mechanism composed of a reflector 3, a piezoelectric ceramic 4, a back plate 5 and a flexible hinge 6 is driven by an azimuth axis system 1 and a pitching axis system 7 to carry out two-dimensional rotation for carrying out initial pointing. After the initial pointing is completed, the motors in the azimuth axis system 1 and the pitch axis system 7 are powered off to stop working, and the azimuth axis system 1 and the pitch axis system 7 are self-locked to keep the current positions.
And step 2, the piezoelectric ceramic 4 drives the reflector 3 to rotate in two dimensions, so that the initial pointing error is compensated, and high-precision pointing alignment is realized. The coarse and fine two-stage adjusting mechanism is matched to realize large-range high-precision pointing of the optical axis.
And 3, when the system performs real-time tracking, the piezoelectric ceramic 4 drives the reflector 3 to perform two-dimensional rotation to perform real-time high-precision tracking on the target. When the rotation angle of the reflector 3 is less than 0.5mrad, the azimuth axis system 1 and the pitching axis system 7 do not work, the current position is kept still by the self-locking capability of the azimuth axis system and the pitching axis system, and the reflector 3 is driven by the piezoelectric ceramic 4 to track the target.
And 4, when the rotation angle of the reflector 3 is larger than 0.5mrad, the azimuth axis system 1 and the pitch axis system 7 rotate along with the rotation, so that the rotation range of the reflector 3 is enlarged. The coarse and fine two-stage adjusting mechanism performs combined work to realize large-range high-precision real-time tracking.
The large-range high-precision optical axis alignment and tracking of the optical axis can be realized through the steps. The high-precision optical axis alignment and tracking with the precision of 30 mu rad in the range of azimuth +/-160 DEG and pitching +/-5 DEG of the optical axis can be realized through the steps.
Claims (3)
1. A two-stage composite single-reflector type mechanical tracking rotary table for laser communication is characterized in that: the rotary table is composed of an azimuth axis 1, a U-shaped frame 2, a reflector 3, piezoelectric ceramics 4, a back plate 5, a flexible hinge 6 and a pitching axis 7.
2. A two-stage compound single mirror mechanical tracking turret for laser communication according to claim 1, wherein: the turntable drives a reflector to realize large-range high-precision optical axis adjustment and alignment by adopting the combined work of a coarse adjusting mechanism and a fine adjusting mechanism, wherein the coarse adjusting mechanism has a large working range and low adjustment precision, and the fine adjusting mechanism has a small working range and high adjustment precision.
3. a two-stage compound single mirror mechanical tracking turret for laser communication according to claim 1, wherein: the coarse adjustment mechanism is designed to have self-locking capacity, the position of a shaft system can be ensured to be unchanged when the motor stops working due to power failure, and the coarse adjustment mechanism can follow the fine adjustment mechanism during working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810545214.5A CN110553124A (en) | 2018-06-01 | 2018-06-01 | Two-stage composite single-reflector type mechanical tracking rotary table for laser communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810545214.5A CN110553124A (en) | 2018-06-01 | 2018-06-01 | Two-stage composite single-reflector type mechanical tracking rotary table for laser communication |
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| CN110553124A true CN110553124A (en) | 2019-12-10 |
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| CN201810545214.5A Pending CN110553124A (en) | 2018-06-01 | 2018-06-01 | Two-stage composite single-reflector type mechanical tracking rotary table for laser communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610626A (en) * | 2020-05-29 | 2020-09-01 | 中国科学院长春光学精密机械与物理研究所 | Antenna structure capable of realizing simultaneous and continuous multi-path laser communication |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195717A (en) * | 2011-05-24 | 2011-09-21 | 中国科学院上海技术物理研究所 | Quantum communication system compatible with laser communication |
| CN102323656A (en) * | 2011-09-28 | 2012-01-18 | 哈尔滨工业大学 | High-frequency response two-dimensional micro angular deflection control reflector based on double-shaft flexible hinge |
| CN106227241A (en) * | 2016-08-01 | 2016-12-14 | 西北工业大学 | A kind of motion platform double-view field double loop scan tracing system and method |
| CN106980328A (en) * | 2017-05-09 | 2017-07-25 | 南京理工大学 | A kind of coarse-fine tracking test turntable for carrying fast mirror |
| CN108400520A (en) * | 2018-03-28 | 2018-08-14 | 赵智亮 | Wavelength continuously adjustable longitudinal mode semiconductor laser |
-
2018
- 2018-06-01 CN CN201810545214.5A patent/CN110553124A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195717A (en) * | 2011-05-24 | 2011-09-21 | 中国科学院上海技术物理研究所 | Quantum communication system compatible with laser communication |
| CN102323656A (en) * | 2011-09-28 | 2012-01-18 | 哈尔滨工业大学 | High-frequency response two-dimensional micro angular deflection control reflector based on double-shaft flexible hinge |
| CN106227241A (en) * | 2016-08-01 | 2016-12-14 | 西北工业大学 | A kind of motion platform double-view field double loop scan tracing system and method |
| CN106980328A (en) * | 2017-05-09 | 2017-07-25 | 南京理工大学 | A kind of coarse-fine tracking test turntable for carrying fast mirror |
| CN108400520A (en) * | 2018-03-28 | 2018-08-14 | 赵智亮 | Wavelength continuously adjustable longitudinal mode semiconductor laser |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610626A (en) * | 2020-05-29 | 2020-09-01 | 中国科学院长春光学精密机械与物理研究所 | Antenna structure capable of realizing simultaneous and continuous multi-path laser communication |
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Application publication date: 20191210 |
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