CN107608071B - A kind of space camera reflecting mirror surface shape control system based on Temperature Distribution - Google Patents
A kind of space camera reflecting mirror surface shape control system based on Temperature Distribution Download PDFInfo
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- CN107608071B CN107608071B CN201710915484.6A CN201710915484A CN107608071B CN 107608071 B CN107608071 B CN 107608071B CN 201710915484 A CN201710915484 A CN 201710915484A CN 107608071 B CN107608071 B CN 107608071B
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Abstract
A kind of space camera reflecting mirror surface shape control system based on Temperature Distribution of the present invention, the system comprises reflecting mirrors, at least one correction actuator, at least one temperature sensor, supporting substrate and electric controller；The temperature sensor is arranged on the reflecting mirror, for detecting the temperature of the reflecting mirror；The correction actuator is arranged between the reflecting mirror and supporting substrate；The electric controller is electrically connected with the temperature sensor and the correction actuator respectively, for obtaining the temperature for the reflecting mirror that temperature sensor detects, and the calibrated force of output needed for obtaining each correction actuator according to the temperature of the reflecting mirror or torque are corrected with the face shape for realizing reflecting mirror.
Description
Technical field
The present invention relates to space active optics system regions more particularly to a kind of space camera reflections based on Temperature Distribution
Mirror surface-shaped control system.
Background technique
With the continuous development of Modern Astronomical technology, the requirement to imaging capability is higher and higher, the bore of space camera
It is increasing therewith.For long-focus, heavy caliber, high-resolution space camera, it is easy by space environment and inside
The influence of environment and image quality is deteriorated, main error source has following aspects: 1 due to space microgravity environment and defend
Overload and impact vibration when star emits will make optical element generate deformation；2 due to inside satellite equipment heating (inner heat source) and
The heat radiation of the radiations heat energy and deep layer space that absorb from the sun, the earth and other celestial bodies, makes optical component generate biggish position
It moves and deformation (inclination, translation, surface distortion etc.).In these error sources, mirror surface deformation is smaller as caused by gravity and has rule
Rule；The deformation of the generations such as bring overload and impact vibration can be by selecting reasonable structure and the way of restraint when satellite launch
Etc. reducing or inhibit substantially.Thus, the major disturbances source being presently considered is exactly that space camera is produced due to the variation in temperature field
Raw low frequency deformation.
Effective means of the active optics technology as reflecting mirror aberration correction, for improving the face of reflecting mirror in space camera
Shape error successfully applies in terrestrial optical/infrared telescope.The composed structure for the active optics technology taken at present is equal
For Wavefront sensor, computer control system and corrector, technology path is to be become using Wavefront sensor real-time detection wavefront
Change and error, then computer control system calculates calibrated force in real time, and driving corrector goes out to export certain power or torque, thus
Real-time correction wavefront error is to guarantee the face shape meet demand of optical element.The technology has the advantages that techniqueflow is clear, but
The disadvantage is that system structure is complicated, weight is high, higher to the dependence of Wavefront sensor.And satellite to the volume of payload,
The requirement of weight, power consumption etc. is very stringent, and volume, weight and power consumption of the overwhelming majority of traditional active optics system etc. are by wavefront
Occupied by sensor and wave-front corrector, so that there are complexity height, system weight are big for existing space active optics system
With the higher problem of dependence to Wavefront sensor.
Summary of the invention
Present invention seek to address that it is big to solve existing space active optics system complexity height, system weight in the prior art
With the higher problem of dependence to Wavefront sensor, a kind of space camera reflecting mirror surface shape control based on Temperature Distribution is proposed
System.
The present invention provides a kind of space camera reflecting mirror surface shape control system based on Temperature Distribution of embodiment, the system
System includes reflecting mirror, at least one correction actuator, at least one temperature sensor, supporting substrate and electric controller；
The temperature sensor is arranged on the reflecting mirror, for detecting the temperature of the reflecting mirror；
The correction actuator is arranged between the reflecting mirror and supporting substrate；
The electric controller is electrically connected with the temperature sensor and the correction actuator respectively, is passed for obtaining temperature
The temperature for the reflecting mirror that sensor detects, and output needed for obtaining each correction actuator according to the temperature of the reflecting mirror
Calibrated force or torque with realize reflecting mirror face shape correct.
Compared with prior art, beneficial effect is technical solution of the present invention: being obtained in real time by temperature sensor anti-
Penetrate the temperature of mirror, the calibrated force or power of output needed for electric controller obtains each correction actuator according to the temperature of the reflecting mirror
Square, final each correction actuator export specified calibrated force or torque respectively to realize the face shape correction of reflecting mirror, therefore can
To cancel Wavefront sensor, without carrying out real-time detection and feedback to reflecting mirror surface shape, so that it is multiple to reduce Surface contral system
Miscellaneous degree, while making the structure of space active optics system simple, it is light-weight, and cost is relatively low.
Detailed description of the invention
Fig. 1 is that the present invention is based on a kind of structures of embodiment of space camera reflecting mirror surface shape control system of Temperature Distribution to show
It is intended to.
1, reflecting mirror, 11, the pedestal of reflecting mirror, 12, the mirror surface of reflecting mirror, 2, correction actuator, 3, temperature sensor, 4,
Supporting substrate, 5, electric controller.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.
The present invention provides a kind of space camera reflecting mirror surface shape control system based on Temperature Distribution of embodiment, such as Fig. 1
Shown, the system comprises reflecting mirrors 1, at least one correction actuator 2, at least one temperature sensor 3,4 and of supporting substrate
Electric controller 5；
The temperature sensor 2 is arranged on the reflecting mirror 1, for detecting the temperature of the reflecting mirror 1；
The correction actuator 2 is arranged between the reflecting mirror 1 and supporting substrate 4；
The electric controller 5 is electrically connected with the temperature sensor 3 and the correction actuator 2 respectively, for obtaining temperature
The temperature of the reflecting mirror that degree sensor detects, and needed for obtaining each correction actuator according to the temperature of the reflecting mirror
The calibrated force or torque of output are corrected with the face shape for realizing reflecting mirror.
Since reflecting mirror 1 is under temperature loading effect, reflecting mirror 1 can generate thermal deformation, so as to cause the mirror surface of reflecting mirror
12 surfaces generate different degrees of protrusion or recess in different zones, and the mirror shape under perfect optical system is smooth continuous
Curved surface realizes that the face shape school of reflecting mirror is to restore the face shape correction of mirror surface after deformation to close to the mirror under perfect optical system
Face face shape.
The present invention obtains the temperature of reflecting mirror 1 by temperature sensor 3 in real time, and electric controller 5 is according to the reflecting mirror 1
Temperature obtains the calibrated force exported needed for each correction actuator 2 or torque, and final each correction actuator exports specified respectively
Calibrated force or torque corrected with the face shape for realizing reflecting mirror, therefore Wavefront sensor can be cancelled, without to reflecting mirror surface shape
Real-time detection and feedback are carried out, to reduce Surface contral system complexity, while making the knot of space active optics system
Structure is simple, light-weight, and cost is relatively low.In addition, the scale of system is easy extension, it can adapt to various space camera reflecting mirrors.
In specific implementation, one end of the correction actuator 2 is fixedly connected with the pedestal 11 of the reflecting mirror, the correction
The other end of actuator 2 connects the supporting substrate 4.Specifically, the back side of the reflecting mirror 1, the school is arranged in pedestal 11
One end of positive actuator 2 is by the pedestal 11 of reflecting mirror described in epoxy glue fixed bonding to transmit certain force or moment loading to institute
Reflecting mirror 1 is stated, the other end of the correction actuator 2 connects the supporting substrate 4 by flexible structure.
In specific implementation, when temperature sensor 3 be it is multiple when, the multiple temperature sensor 3 be uniformly distributed or it is non-
It is fixed on the mirror surface 12 of the reflecting mirror or on pedestal 11 to even distribution, by described in 3 real-time detection of temperature sensor
On the mirror surface 12 of reflecting mirror or the temperature of 11 current location of pedestal, current location institute can be more accurately reacted by temperature value
The deformation of the mirror surface 12 of reflecting mirror is stated so that the electric controller 5 controls the correction actuator accurately output calibration power or power
Square.
In specific implementation, when the correction actuator 2 be it is multiple when, the multiple correction actuator 2 be uniformly distributed or
It is fixed on to non-uniform Distribution on supporting substrate 4.
In specific implementation, the reflecting mirror 1 uses cellular structure, and material is silicon carbide；The supporting substrate 4 is
Triangle plank frame, and material is titanium alloy TC 4.Specifically, temperature sensor 3 uses thermistor, model MF501 leads to
It crosses room temperature vulcanized silicone rubber GD414 to be pasted on reflecting mirror 1, quantity is 24.Actuator 2 is corrected to drive using stepper motor,
Quantity is 18.
In specific implementation, the electric controller 5 is also used to be obtained instead according to the temperature value that all temperature sensors 3 measure
Penetrate the face shape to be corrected of mirror 1, and the correction of output needed for obtaining each correction actuator 2 according to the face shape to be corrected of reflecting mirror 1
In addition power or correction torque pass through the available calculated result of the existing calculation formula in this field in the above calculating process.Finally
Specific correction power or moment loading are generated on reflecting mirror 1, to complete 1 Surface contral of reflecting mirror by control correction actuator 2
With correction.
The above embodiments and description only illustrate the principle of the present invention and most preferred embodiment, is not departing from this
Under the premise of spirit and range, various changes and improvements may be made to the invention, these changes and improvements both fall within requirement and protect
In the scope of the invention of shield.
Claims (7)
1. a kind of space camera reflecting mirror surface shape control system based on Temperature Distribution, it is characterised in that: the system comprises anti-
Penetrate mirror, at least one correction actuator, at least one temperature sensor, supporting substrate and electric controller；
The temperature sensor is arranged on the reflecting mirror, for detecting the temperature of the reflecting mirror；
The correction actuator is arranged between the reflecting mirror and supporting substrate；
The electric controller is electrically connected with the temperature sensor and the correction actuator respectively, for obtaining temperature sensor
The temperature of the reflecting mirror detected, and according to the temperature of the reflecting mirror obtain it is each correction actuator needed for output school
Positive force or torque are corrected with the face shape for realizing reflecting mirror；
When temperature sensor be it is multiple when, the multiple temperature sensor be uniformly distributed or non-uniform Distribution be fixed on institute
It states on the mirror surface of reflecting mirror or on pedestal.
2. space camera reflecting mirror surface shape control system as described in claim 1, it is characterised in that: the one of the correction actuator
End is fixedly connected with the pedestal of the reflecting mirror, and the other end of the correction actuator connects the supporting substrate.
3. space camera reflecting mirror surface shape control system as claimed in claim 2, it is characterised in that: the one of the correction actuator
End is by the pedestal of reflecting mirror described in epoxy glue fixed bonding to transmit certain force or moment loading to the reflecting mirror, the school
The other end of positive actuator connects the supporting substrate by flexible structure.
4. space camera reflecting mirror surface shape control system as described in claim 1, it is characterised in that: when the correction actuator is
When multiple, the multiple correction actuator be uniformly distributed or non-uniform Distribution be fixed on supporting substrate.
5. space camera reflecting mirror surface shape control system as claimed in claim 2, it is characterised in that: the pedestal of the reflecting mirror is adopted
With cellular structure, and material is silicon carbide.
6. space camera reflecting mirror surface shape control system as described in claim 1, it is characterised in that: the supporting substrate is triangle
Plank frame, and material is titanium alloy TC 4.
7. space camera reflecting mirror surface shape control system as claimed in any one of claims 1 to 6, it is characterised in that: described automatically controlled
Device processed is also used to obtain the face shape to be corrected of reflecting mirror according to the temperature of the reflecting mirror, and according to the face shape to be corrected of reflecting mirror
Obtain the calibrated force exported needed for each correction actuator or torque.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710915484.6A CN107608071B (en) | 2017-09-30 | 2017-09-30 | A kind of space camera reflecting mirror surface shape control system based on Temperature Distribution |
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| CN201710915484.6A CN107608071B (en) | 2017-09-30 | 2017-09-30 | A kind of space camera reflecting mirror surface shape control system based on Temperature Distribution |
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| CN107608071B true CN107608071B (en) | 2019-11-05 |
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| CN112068307B (en) * | 2020-09-21 | 2021-12-07 | 中国科学院长春光学精密机械与物理研究所 | Hybrid thermally-driven wavefront correction device |
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Non-Patent Citations (2)
| Title |
|---|
| 变形镜热变形及其对光束质量的影响分析;胡小川等;《中国激光》;20150131;第42卷(第1期);第0102003-1至0102003-9页 * |
| 基于变形镜热变形预估模型的自校正效果分析;胡小川等;《中国激光》;20151231;第42卷(第12期);第1202001-1至1202001-8页 * |
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