CN106371192A - Large-size astronomical telescope panel actuator and control method thereof - Google Patents
Large-size astronomical telescope panel actuator and control method thereof Download PDFInfo
- Publication number
- CN106371192A CN106371192A CN201610838931.8A CN201610838931A CN106371192A CN 106371192 A CN106371192 A CN 106371192A CN 201610838931 A CN201610838931 A CN 201610838931A CN 106371192 A CN106371192 A CN 106371192A
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- China
- Prior art keywords
- electric machine
- astronomical telescope
- support plate
- head
- ultrasound electric
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/198—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors with means for adjusting the mirror relative to its support
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a large-size astronomical telescope panel actuator and a control method thereof. The actuator comprises a fixation support plate, a dish-shaped spring stack, an actuating head, a differential thread shaft, an axial flexible hinge, an ultrasonic motor, a sealing ring and an encoder, wherein one end of the dish-shaped spring stack is connected with the fixation support plate through a bolted joint, and the other end is connected with the actuating head; one end of the differential thread shaft is connected with the ultrasonic motor and the encoder, and the other end is connected with a thread through hole of the fixation support plate and a thread blind hole of the actuating head through two scyewed joints with unequal pitches; and one end of the axial flexible hinge is fixed on the fixation support plate, and the other end is fixed on a pedestal of the ultrasonic motor. The large-size astronomical telescope panel actuator has the advantages of high positioning precision, rapid response, high stability and the like.
Description
Technical field
The invention belongs to piezoelectric actuator technical field, specifically a kind of large-scale astronomical telescope panel actuator and its control
Method.
Background technology
At present, with astronomical continuous fast development, higher requirement be it is also proposed to astronomical telescope, for radio
Astronomical telescope, its Active Reflector technology is that the manufacture of Large-diameter Radio Telescope reflecting surface provides technical support.Leading
In dynamic reflection surface technology, reflecting surface is put together by polylith sub-panel, and each sub-panel is generally required for the microbit of more than 3
Displacement actuator is supported and quick regulation, realizes pitching, beat and the translation of sub-panel, thus reaching the high accuracy of reflecting surface
Require.Mechanical micro-displacement actuator, as the support of sub-panel and governor motion, is the core in astronomical telescope Active Reflector technology
Center portion part, is a kind of accurate straight-line displacement output device, needs with high-resolution (micro/nano level), high stability, Gao Gang
The features such as degree, high repeatable accuracy, heavy load performance and grade stroke, therefore, mechanical micro-displacement actuator based on piezoelectric activity
Very worth further investigation.
Content of the invention
It is directed to above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of high-precision based on piezoelectric activity
Degree, high stability and high-resolution large-scale astronomical telescope panel actuator and its control method, to solve prior art
Some technological deficiencies that the mechanical micro-displacement actuator structure of middle many large-scale astronomical telescopes exists.
For reaching above-mentioned purpose, a kind of large-scale astronomical telescope panel actuator of the present invention, comprising: fixed support plate,
Dish-shaped-spring stack, actuate head, differential thread axle, axial elasticity hinge, ultrasound electric machine, sealing ring and encoder；Described combination
Disk spring passes through bolt-connection, and its one end is connected with described fixed support plate, and the other end is connected with the described head that actuates；Institute
State differential thread axle, its one end is connected with described ultrasound electric machine and described encoder, the other end passes through the spiral shell of two decreasing worm-pitch
Stricture of vagina connection respectively with the tapped through hole of fixed support plate and actuate the tapped blind hole of head and be connected；One end is fixed on described fixing support
On plate, the other end is fixed on the pedestal of described ultrasound electric machine；Described sealing ring is between ultrasound electric machine and encoder.
Preferably, combinations of the above disk spring, while restriction actuates circumferentially displaced, is in extended state all the time,
To actuate the screw thread backhaul gap of head described in elimination and to provide axial displacement to compensate.
Preferably, above-mentioned axial elasticity hinge provides to the axial displacement of ultrasound electric machine and compensates.
Preferably, above-mentioned differential thread axle is respectively with fixed support plate with the pitch not phase that actuates the screw thread that head is connected
Deng；When applying pumping signal to described ultrasound electric machine, when driving the rotation of described differential thread axle, described to actuate head relatively described solid
Determine gripper shoe and produce axial displacement, its displacement is the product with the differential thread axle rotation number of turns for the pitch difference of two sections of screw threads.
A kind of control method of large-scale astronomical telescope panel actuator of the present invention, includes the following:
Apply same frequency, the constant amplitude alternating voltage drive signal that phase contrast is to ultrasound electric machine, inverse by piezo ceramic element
Piezoelectric effect inspire stator over time and space all dephased two homotypes with frequency mode, two mode are on stator
Superposition forms traveling wave, by the rubbing action between stator and rotor, drives rotor to rotate, drives the rotation of differential thread axle, due to difference
The pitch of dynamic two sections of screw threads of thread spindle, makes to actuate head and is relatively fixed gripper shoe and produce small axial displacement, its displacement
Pitch difference for two sections of screw threads and the product of the differential thread axle rotation number of turns；Encoder is real as a kind of angular displacement detecting device
Existing feedback control is thus ensure that panel actuator preferably works.
Beneficial effects of the present invention:
Actuate head in the large-scale astronomical telescope panel actuator of the present invention to cut with scissors and differential spiral shell in dish-shaped-spring stack, axial elasticity
Screw thread backhaul gap can be eliminated, restriction is circumferentially displaced, provide axial displacement compensation, reduction error, raising smart in the presence of stricture of vagina axle
Degree is thus realize actuating the micro-displacement of head axial direction so that fine adjustment telescope panel angle；This structure has positioning precision
The advantages of high, response is fast, stability is high.
Brief description
The structural representation of Fig. 1 illustrated embodiments medium-and-large-sized astronomical telescope panel actuator.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further with accompanying drawing with reference to embodiment
Bright, the content not limitation of the invention that embodiment refers to.
With reference to shown in Fig. 1, in embodiment, a kind of large-scale astronomical telescope panel actuator of the present invention, comprising: fixing
Gripper shoe 1, dish-shaped-spring stack 2, actuate a 3, differential thread axle 4, axial elasticity hinge 5, ultrasound electric machine 6, sealing ring 7 and coding
Device 8, one end of described dish-shaped-spring stack 2 is connected with described fixed support plate 1 by bolt-connection, the other end with described
Actuate 3 to be connected；One end of described differential thread axle 4 is connected with described ultrasound electric machine 6 and described encoder 8, and the other end leads to
Cross the thread connection of two decreasing worm-pitch respectively with the tapped through hole of described fixed support plate 1 and described actuate 3 screw thread blind
Hole is connected；Described axial elasticity hinge 5 is arranged between ultrasound electric machine 6 and fixed support plate 1, and solid up and down with both by bolt
Fixed.
Wherein, it is provided with sealing ring 7 between described ultrasound electric machine 6 and encoder 8, make compact conformation, and prevent inside
Part is affected normal operation by external environmental interference.
Described dish-shaped-spring stack 2 actuate described in limiting 3 circumferentially displaced while, be in extended state all the time, with
Actuate a 3 screw thread backhaul gap described in elimination and provide axial displacement to compensate.
Described axial elasticity hinge 5 provides to the axial displacement of ultrasound electric machine 6 and compensates, and this ultrasound electric machine 6 selects travelling-wave type to revolve
Turn ultrasound electric machine.
Described differential thread axle 4 respectively with fixed support plate 1 and to actuate a pitch of 3 screw threads being connected unequal；When giving
Described ultrasound electric machine 6 applies pumping signal, when driving described differential thread axle 4 rotation, described actuate a 3 relatively described fixation and props up
Fagging 1 produces axial displacement, and its displacement is the product with the differential thread axle 4 rotation number of turns for the pitch difference of two sections of screw threads.
A kind of control method of large-scale astronomical telescope panel actuator of the present invention, includes the following:
Apply same frequency (in supersonic range), the constant amplitude alternating voltage drive signal that phase contrast is to ultrasound electric machine, by piezoelectricity
The inverse piezoelectric effect of ceramic component inspire stator over time and space all dephased two homotypes with frequency mode, two
Mode is superimposed formation traveling wave on stator, by the rubbing action between stator and rotor, drives rotor to rotate, drives differential thread
Axle rotates, and due to the pitch of two sections of screw threads of differential thread axle, makes to actuate head and is relatively fixed gripper shoe and produces small axial direction
Displacement, its displacement is the product with the differential thread axle rotation number of turns for the pitch difference of two sections of screw threads；Encoder is as a kind of angle
Displacement detector realizes feedback control thus ensureing that panel actuator preferably works.
But the presence due to error, so need described dish-shaped-spring stack coupling, eliminate screw thread backhaul gap, limit
System is circumferentially displaced, provide axial displacement and described axial elasticity to cut with scissors the circumferential position of small electromotor axial displacement and limiting motor
Move, final stroke reaches required precision target.
Concrete application approach of the present invention is a lot, the above be only the preferred embodiment of the present invention it is noted that for
For those skilled in the art, under the premise without departing from the principles of the invention, some improvement can also be made, this
A little improvement also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of large-scale astronomical telescope panel actuator is it is characterised in that include: fixed support plate, dish-shaped-spring stack, rush
Dynamic head, differential thread axle, axial elasticity hinge, ultrasound electric machine, sealing ring and encoder；Described dish-shaped-spring stack passes through bolt
Connection, its one end is connected with described fixed support plate, and the other end is connected with the described head that actuates；Described differential thread axle, its
One end is connected with described ultrasound electric machine and encoder, and the thread connection that the other end passes through two decreasing worm-pitch is supported with fixing respectively
The tapped through hole of plate is connected with the tapped blind hole actuating head；One end is fixed on described fixed support plate, and the other end is fixed on institute
State on the pedestal of ultrasound electric machine；Described sealing ring is between ultrasound electric machine and encoder.
2. large-scale astronomical telescope panel actuator according to claim 1 it is characterised in that combinations of the above dish bullet
Spring, while restriction actuates circumferentially displaced, is in extended state all the time, to actuate the screw thread backhaul gap of head described in eliminating
And provide axial displacement to compensate.
3. large-scale astronomical telescope panel actuator according to claim 1 is it is characterised in that above-mentioned axial elasticity cuts with scissors
There is provided compensation to the axial displacement of ultrasound electric machine.
4. large-scale astronomical telescope panel actuator according to claim 1 is it is characterised in that above-mentioned differential thread axle
Respectively with fixed support plate and actuate the screw thread that head is connected pitch unequal；When to described ultrasound electric machine apply pumping signal,
When driving described differential thread axle rotation, the described head that actuates is relatively fixed gripper shoe generation axial displacement, and its displacement is two sections
The pitch difference of screw thread rotates the product of the number of turns with differential thread axle.
5. a kind of control method of large-scale astronomical telescope panel actuator is it is characterised in that include the following:
Apply same frequency, the constant amplitude alternating voltage drive signal that phase contrast is to ultrasound electric machine, inverse by piezo ceramic element
Piezoelectric effect inspire stator over time and space all dephased two homotypes with frequency mode, two mode are on stator
Superposition forms traveling wave, by the rubbing action between stator and rotor, drives rotor to rotate, drives the rotation of differential thread axle, due to difference
The pitch of dynamic two sections of screw threads of thread spindle, makes to actuate head and is relatively fixed gripper shoe and produce small axial displacement, its displacement
Pitch difference for two sections of screw threads and the product of the differential thread axle rotation number of turns；Encoder is real as a kind of angular displacement detecting device
Existing feedback control is thus ensure that panel actuator preferably works.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610838931.8A CN106371192B (en) | 2016-09-21 | 2016-09-21 | A kind of large-scale astronomical telescope panel actuator and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610838931.8A CN106371192B (en) | 2016-09-21 | 2016-09-21 | A kind of large-scale astronomical telescope panel actuator and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106371192A true CN106371192A (en) | 2017-02-01 |
| CN106371192B CN106371192B (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610838931.8A Expired - Fee Related CN106371192B (en) | 2016-09-21 | 2016-09-21 | A kind of large-scale astronomical telescope panel actuator and its control method |
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| CN (1) | CN106371192B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112799208A (en) * | 2020-12-29 | 2021-05-14 | 中国科学院国家天文台南京天文光学技术研究所 | High-precision micro-displacement actuator for adjusting mirror surface position of astronomical telescope |
| CN113687489A (en) * | 2021-09-16 | 2021-11-23 | 中国科学院国家天文台南京天文光学技术研究所 | Flexible displacement actuator for large optical infrared telescope splicing mirror surface |
Citations (7)
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|---|---|---|---|---|
| EP0391045A2 (en) * | 1989-04-06 | 1990-10-10 | Rockwell International Corporation | High-range and resolution determinate mount and positioner |
| US20020021504A1 (en) * | 2000-05-27 | 2002-02-21 | Martin Bayer | Precision positioning apparatus for positioning a component especially an optical component |
| CN2733390Y (en) * | 2003-12-29 | 2005-10-12 | 中国科学院光电技术研究所 | Unidirectional differential adjusting mechanism of 45-degree reflector |
| CN103091834A (en) * | 2013-02-20 | 2013-05-08 | 清华大学 | Deformation mirror |
| CN103645556A (en) * | 2012-12-28 | 2014-03-19 | 清华大学 | Deformable mirror |
| CN105048866A (en) * | 2015-07-31 | 2015-11-11 | 上海卫星工程研究所 | Ultrasonic motor based high-precision driving device for effective load and assembly method |
| CN206115005U (en) * | 2016-09-21 | 2017-04-19 | 南京航空航天大学 | Large -scale astronomical telescope panel actuator |
-
2016
- 2016-09-21 CN CN201610838931.8A patent/CN106371192B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0391045A2 (en) * | 1989-04-06 | 1990-10-10 | Rockwell International Corporation | High-range and resolution determinate mount and positioner |
| US20020021504A1 (en) * | 2000-05-27 | 2002-02-21 | Martin Bayer | Precision positioning apparatus for positioning a component especially an optical component |
| CN2733390Y (en) * | 2003-12-29 | 2005-10-12 | 中国科学院光电技术研究所 | Unidirectional differential adjusting mechanism of 45-degree reflector |
| CN103645556A (en) * | 2012-12-28 | 2014-03-19 | 清华大学 | Deformable mirror |
| CN103091834A (en) * | 2013-02-20 | 2013-05-08 | 清华大学 | Deformation mirror |
| CN105048866A (en) * | 2015-07-31 | 2015-11-11 | 上海卫星工程研究所 | Ultrasonic motor based high-precision driving device for effective load and assembly method |
| CN206115005U (en) * | 2016-09-21 | 2017-04-19 | 南京航空航天大学 | Large -scale astronomical telescope panel actuator |
Non-Patent Citations (1)
| Title |
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| 尹育聪 等: "行波型旋转超声电机双路行波的运行机理", 《中国电机工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112799208A (en) * | 2020-12-29 | 2021-05-14 | 中国科学院国家天文台南京天文光学技术研究所 | High-precision micro-displacement actuator for adjusting mirror surface position of astronomical telescope |
| CN113687489A (en) * | 2021-09-16 | 2021-11-23 | 中国科学院国家天文台南京天文光学技术研究所 | Flexible displacement actuator for large optical infrared telescope splicing mirror surface |
Also Published As
| Publication number | Publication date |
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| CN106371192B (en) | 2019-01-29 |
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Granted publication date: 20190129 Termination date: 20200921 |