CN102426026B - Star simulator and star sensor ground calibration device - Google Patents

Star simulator and star sensor ground calibration device Download PDF

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Publication number
CN102426026B
CN102426026B CN 201110256960 CN201110256960A CN102426026B CN 102426026 B CN102426026 B CN 102426026B CN 201110256960 CN201110256960 CN 201110256960 CN 201110256960 A CN201110256960 A CN 201110256960A CN 102426026 B CN102426026 B CN 102426026B
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China
Prior art keywords
star
light
negative lens
signal
illuminator
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CN 201110256960
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Chinese (zh)
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CN102426026A (en
Inventor
张国玉
付芸
苏拾
王凌云
孙高飞
杨孟飞
王大轶
郝彩云
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长春理工大学
北京控制工程研究所
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Priority to CN201010515696 priority Critical
Priority to CN201010515696.3 priority
Application filed by 长春理工大学, 北京控制工程研究所 filed Critical 长春理工大学
Priority to CN 201110256960 priority patent/CN102426026B/en
Publication of CN102426026A publication Critical patent/CN102426026A/en
Application granted granted Critical
Publication of CN102426026B publication Critical patent/CN102426026B/en

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Abstract

The invention provides a star simulator and a star sensor ground calibration device. The star simulator comprises an illumination system and an optical system. The illumination system comprises a control module, an analogue switch module, a light-emitting module, a star map target incident plate and a target. The control module generates a control signal and a star magnitude analogue signal and outputs the control signal and the star magnitude analog signal. The analogue switch module selects an analog access according to the received control signal and outputs the received star magnitude analog signal through the selected analog access. The light-emitting module includes a plurality of amplification and current drive circuits and a plurality of LEDs. And the optical system comprises a first negative lens, a first positive lens, a second positive lens, and a second negative lens. The first negative lens, the first positive lens, the second positive lens, and the second negative lens are successively arranged on optical axes of light paths at a same level. According to the star simulator and the star sensor ground calibration device in the invention, a resolution ratio and contrast of star map simulation can be improved and precision of the star map simulation can also be enhanced.

Description

Star simulator and star sensor ground calibration device
Technical field
The present invention relates to the spacecraft calibration technique, relate in particular to a kind of star simulator and star sensor ground calibration device.
Background technology
Development along with Space Science and Technology, spacecraft has more and more trended towards adopting the space optics attitude sensor to carry out seizure and the measurement of real-time attitude, and adopt celestial guidance to replace inertial navigation, the star sensor that replaces single shaft or three axle gyrocontrol states by star chart real time correction, stable aircraft attitude, be widely used at present, flight position deviation and attitude misalignment that aircraft can provide in real time according to it, start servo-drive system at any time to proofread and correct these deviations.
Star simulator is as the important component part of the ground calibration facility of star sensor, for position, brightness and the spectral characteristic etc. of simulating the sky culminant star.Star simulator can be divided into static star simulator and Dynamic Star simulator according to the difference of working method.Static star simulator essence is a parallel light tube, place star tester in position of focal plane, after light source irradiation, star tester just can be imaged onto infinite distance by parallel light tube and simulate star chart, this star simulator simple in structure, do not have requirement of real-time, can realize the high-precision analog of single star subtended angle, asterism position and magnitude, but can only simulate single star chart, dirigibility is not high.Dynamic Star simulator is usingd liquid crystal light valve etc. usually as the star chart display device, and the control by computer software to each pixel realizes the dynamic similation of star chart and the magnitude of asterism are controlled.This star simulator structure is comparatively complicated, high to the requirement of star chart refresh rate, and, owing to being subject to the restriction of Pixel Dimensions when simulating asterism, often simulation precision is high not as static star simulator.
Summary of the invention
The invention provides a kind of star simulator and star sensor ground calibration device, to improve precision and the dirigibility of star image simulation.
The invention provides a kind of star simulator, comprising:
Illuminator, comprise control module, analog switch module, light emitting module, star chart target incident plate and target;
Described control module is for according to what receive, in order to the championship indicator signal of indicating the asterism position with in order to the magnitude indicator signal of indicating asterism brightness, producing control signal and magnitude simulating signal, and output;
Described analog switch module comprises a plurality of analog channels, described analog switch module is connected with described control module, select a described analog channel for the described control signal according to receiving, and the described magnitude simulating signal received is passed through to the described analog channel output of selecting;
Described light emitting module comprises a plurality of amplifications and current driving circuit, with a plurality of LED, described amplification and current driving circuit are corresponding connected one by one with described LED, described amplification and current driving circuit are corresponding connected one by one with the analog channel of described analog switch, described amplification and current driving circuit are for amplifying the described magnitude simulating signal received and the voltage-current transformation processing, the generation current output signal, to drive described LED luminous;
Described a plurality of LED array formula is arranged on described star chart target incident plate;
Be equipped with a plurality of circular holes on described target, the setting corresponding to described LED of described circular hole;
Optical system, comprise the first negative lens, the first positive lens, the second positive lens and the second negative lens, described the first negative lens, described the first positive lens, described the second positive lens and described the second negative lens are successively set on the optical axis of same level light path, the light that described illuminator is sent parallel ejaculation after described the first negative lens, described the first positive lens, described the second positive lens and described the second negative lens.
The invention provides a kind of star sensor ground calibration device, comprise the air-flotation type optical table, also comprise as star simulator provided by the invention, described star simulator is arranged on described air-flotation type optical table.
As shown from the above technical solution, star simulator provided by the invention and star sensor ground calibration device, it is luminous that illuminator can realize controlling one of them of a plurality of LED according to the championship indicator signal, with the simulation to the asterism position, improved the dirigibility of star chart conversion.The luminous brightness of LED can be controlled according to the current signal of magnitude indicator signal generation respective magnitudes, with the simulation to asterism brightness.And LED is for can produce highlighted element, and the adjustable extent of brightness is large, and brightness is even, improved resolution and the contrast of star image simulation, improved the precision of star image simulation.And optical system is the separate type optical system, can avoid gluing together the impact of the cemented surface of eyeglass on imaging, further improved imaging precision, and the optical element used is few, simple in structure, be conducive to processing and assembling.
The accompanying drawing explanation
The star simulator structural representation that Fig. 1 provides for the embodiment of the present invention one;
The structural representation that Fig. 2 is illuminator in Fig. 1;
The optical system structure schematic diagram of the star simulator that Fig. 3 provides for the embodiment of the present invention two;
The optical system structure schematic diagram of the star simulator that Fig. 4 provides for the embodiment of the present invention three;
The lighting system structure schematic diagram of the star simulator that Fig. 5 provides for the embodiment of the present invention four;
The structural representation of the very Rotating Platform for High Precision Star Sensor ground caliberating device that Fig. 6 provides for the embodiment of the present invention six.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention is clearer, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.It should be noted that, in accompanying drawing or instructions, similar or identical element is all used identical Reference numeral.
Embodiment mono-
The star simulator structural representation that Fig. 1 provides for the embodiment of the present invention one, the structural representation that Fig. 2 is illuminator in Fig. 1.As depicted in figs. 1 and 2, the star simulator that the present embodiment provides specifically can be applied to the ground of star sensor is demarcated, and the star simulator that the present embodiment provides specifically comprises illuminator 81 and optical system 82.Illuminator 81 comprises control module 11, analog switch module 12, light emitting module 13, star chart target incident plate and target.Control module 11 is for according to what receive, in order to the championship indicator signal of indicating the asterism position with in order to the magnitude indicator signal of indicating asterism brightness, producing control signal and magnitude simulating signal, and output.Analog switch module 12 comprises a plurality of analog channels, and analog switch module 12 is connected with control module 11, for the control signal according to receiving, selects an analog channel, and the magnitude simulating signal received is exported by the analog channel of selecting.Light emitting module 13 comprises a plurality of amplifications and current driving circuit 131, with a plurality of LED, amplification and current driving circuit 131 are corresponding connected one by one with LED, amplification and current driving circuit 131 are corresponding connected one by one with the analog channel of analog switch, amplification and current driving circuit 131 amplify for the magnitude simulating signal by receiving and voltage-current transformation is processed, the generation current output signal, luminous with driving LED.A plurality of LED array formulas are arranged on star chart target incident plate (not shown).Be equipped with a plurality of circular holes on the target (not shown), circular hole setting corresponding to LED.The diameter of circular hole is specifically as follows 20 microns.The light that the LED arranged on star chart target incident plate sends, after the circular hole on target, forms the uniform star chart of brightness.Optical system 82 comprises the first negative lens 21, the first positive lens 22, the second positive lens 23 and the second negative lens 24, the first negative lens 21, the first positive lens 22, the second positive lens 23 and the second negative lens 24 are successively set on the optical axis of same level light path, and the light that illuminator 81 is sent is through the first negative lens 21, the first positive lens 22, the second positive lens 23 and parallel ejaculation after the second negative lens 24.
Concrete, control module 11 can be for the user provides human-computer interaction interface, for user's input in order to the championship indicator signal of indicating the asterism position with in order to indicate the magnitude indicator signal of asterism brightness.The magnitude simulating signal is specially voltage signal, has certain magnitude of voltage, and the magnitude simulating signal is with the magnitude indicator signal to corresponding, and the magnitude of voltage of the magnitude simulating signal that the magnitude indicator signal of different numerical value is corresponding is also different.Can control the luminosity of LED by this magnitude simulating signal, to realize the simulation to magnitude.Control signal is specially the digital signal value of controlling the LED position, analog switch module 12 under the control of control signal, selects a plurality of analog channels one of them, one of them is luminous to control a plurality of LED, to simulate the position of asterism.Analog switch module 12 is specifically as follows the single pole multiple throw with address control end, under the control of control signal, between a plurality of analog channels, switches.Magnitude simulating signal by 12 outputs of analog switch module is processed through the amplification of amplification and current driving circuit 131, and it is luminous to convert the corresponding LED of current signal rear drive to by voltage signal, has just realized the single-point of LED is controlled.The position of LED and quantity specifically can need to arrange according to star chart.
Concrete, the photocentre of the first negative lens 21, the first positive lens 22, the second positive lens 23 and the second negative lens 24 all is positioned on same optical axis, can each lens be fixed by support.The first negative lens 21 materials are specifically as follows BF11 glass, belong to barium flint glass.The material of the first positive lens 22 is specifically as follows TF3 glass, belongs to extraordinary flint glass.The material of the second positive lens 23 is specially TF3 glass, belongs to extraordinary flint glass.The material of the second negative lens 24 is specifically as follows BF11 glass, belongs to barium flint glass.Each lens also can adopt other to have the material of low abbe number, with the present embodiment, are not limited.The focal length of the optical system 82 that the first negative lens 21, the first positive lens 22, the second positive lens 23 and the second negative lens 24 form is specifically as follows 5000mm.The light that illuminator 81 is sent forms directional light after the processing of each lens of optical system 82, and star chart is imaged onto to infinite distance, to simulate the star chart that very Rotating Platform for High Precision Star Sensor observes in-orbit.
The star simulator that the present embodiment provides, it is luminous that illuminator 81 can realize controlling one of them of a plurality of LED according to the championship indicator signal, with the simulation to the asterism position, improved the dirigibility of star chart conversion.The luminous brightness of LED can be controlled according to the current signal of magnitude indicator signal generation respective magnitudes, with the simulation to asterism brightness.And LED is for can produce highlighted element, and the adjustable extent of brightness is large, and brightness is even, improved resolution and the contrast of star image simulation, improved the precision of star image simulation.And optical system 82 is separate type optical system 82, can avoid gluing together the impact of the cemented surface of eyeglass on imaging, further improved imaging precision, and the optical element used is few, simple in structure, be conducive to processing and assembling.
Embodiment bis-
The optical system structure schematic diagram of the star simulator that Fig. 3 provides for the embodiment of the present invention two.As shown in Figure 3, in the present embodiment, this star simulator can also comprise optical filter 25 and attenuator 26.Optical filter 25 is arranged between illuminator 81 and optical system 82, for the light that illuminator 81 the is sent processing that filters.Attenuator 26 is arranged between optical filter 25 and optical system 82, for the light that will penetrate from optical filter 25, carries out attenuation processing.Concrete, optical filter 25, for the simulated spectra wave band, can be realized 0.5 μ m~0.8 μ m spectral range.Attenuator 26 is for the asterism output energy of decaying, and the attenuator 26 that can adopt attenuation coefficient to be respectively 30% (transmitance T=0.7), 50% (transmitance T=0.5) or 75% (transmitance T=0.25) supplies.
In the present embodiment, optical system 82 can also comprise the first catoptron 27, the first Amici prism 28 and the first reading microscope 29.The first catoptron 27 is arranged on the back of the second negative lens 24, the directional light former road reflection of the first catoptron 27 for penetrating from the second negative lens 24, and directional light is 0 degree to the incident angle of the first catoptron 27.The first Amici prism 28 is arranged between illuminator 81 and the first eyeglass, and Amici prism is given the first eyeglass for the light transmission that will send from illuminator 81, and the light that will penetrate from the first eyeglass carry out light-splitting processing, forms the first beamlet.The first reading microscope 29 is for being detected the first beamlet.
The light that illuminator 81 is sent is through the first Amici prism 28, after part light transmits the first Amici prism 28, after the processing of the first negative lens 21, the first positive lens 22, the second positive lens 23 and the second negative lens 24, form directional light, directional light vertical incidence the first catoptron 27, reflection Hou Yuan road through the first catoptron 27 is returned, after the second negative lens 24, the second positive lens 23, the first positive lens 22 and the first negative lens 21, carry out light-splitting processing through the first Amici prism 28 again, form the first beamlet.Detected by 29 pairs of the first beamlets of the first reading microscope, can be realized the detection to starlight outgoing precision.Concrete, the first reading microscope 29 is arranged on three-dimension adjusting mechanism, be provided with cross-graduation plate 30 or high precision waffle slab before the first reading microscope 29, can adopt laser direct writing method to make, its groove positioning precision is 0.2~0.5 μ m, to improve the first microscopical detection angles and precision.Concrete, the interval of the first reading microscope 29 and the first Amici prism 28, and the interval with the first Amici prism 28 of illuminator 81 equates.
In actual star simulator starlight outgoing precision calibration process, can adopt special standard target to be designated as the outgoing precision that benchmark is demarcated starlight, change the target of star simulator into the standard target, and the standard target cursor position is adjusted on the focal plane of optical system 82, the pattern that is provided with 81 generations of standard target target illuminator is standard target target pattern, pattern is through the first Amici prism 28, Amici prism, the first negative lens 21, the first positive lens 22, after the second positive lens 23 and the second negative lens 24, vertical incidence the first catoptron 27Hou Yuan road is returned, carry out light-splitting processing through the first Amici prism 28 again, form standard target target autocollimation picture on cross-graduation plate 30, measuring mark on a map the position of each picture point of case autocollimation picture of standard target by the first reading microscope 29 (for aim at) and three-dimension adjusting mechanism (for measuring displacement) puts on the known pattern position with standard target and compares, if the maximal value of its error is Δ max, return after by the autocollimation plane mirror and be exaggerated two times on image planes due to the error of optical system 82, improved testing accuracy, starlight outgoing precision Δ θ is:
Wherein, f realfor optical system 82 actual measurement focal length values.
If the measuring error that optical system 82 produces is 0.124 ", the standard target adopts laser direct writing equipment to make, the groove positioning precision is 0.2~0.5 μ m, the measuring error caused thus is 0.0083 "~0.021 ", the displacement measurement precision of three-dimension adjusting mechanism is 1 μ m, the measuring error caused thus is 0.058 ", reading microscope adopts the clamp alignment so, the magnification of choosing reading microscope is 50 *, consequent measuring error is 0.03 ", after error is synthetic, the measuring error of starlight outgoing accuracy detection is 0.142 ", improved thus the precision of starlight outgoing accuracy detection.
Embodiment tri-
The optical system structure schematic diagram of the star simulator that Fig. 4 provides for the embodiment of the present invention three.As shown in Figure 4, the difference of the star simulator that the present embodiment provides and embodiment bis-is, can also adopt following structure to test to starlight outgoing precision.Optical system 82 can also comprise the second catoptron 31, the 3rd catoptron 32, the second Amici prism 33 and the second reading microscope 34.The second catoptron 31 reflects to the first eyeglass for the light that illuminator 81 is sent, and the light that illuminator 81 is sent is 10 degree to the incident angle of the second catoptron 31.The 3rd catoptron 32 is arranged on the back of the 4th eyeglass, and the 3rd catoptron 32 is for the directional light that will penetrate from the 4th eyeglass former road reflection, and directional light is 0 degree to the incident angle of the 3rd catoptron 32.The second Amici prism 33 is arranged between illuminator 81 and the second catoptron 31, and be arranged on the light path of illuminator 81, the second Amici prism 33 is given the second catoptron 31 for light transmission that illuminator 81 is sent, and the light that will reflect through the second catoptron 31 carries out light-splitting processing, form the second beamlet.The second reading microscope 34 is for being detected the second beamlet.
The light that illuminator 81 is sent is through the second Amici prism 33, after part light transmits the first Amici prism 28, after the reflection of the second catoptron 31, through the first negative lens 21, the first positive lens 22, the processing of the second positive lens 23 and the second negative lens 24 forms directional light, directional light vertical incidence the 3rd catoptron 32, reflection Hou Yuan road through the 3rd catoptron 32 is returned, through the second negative lens 24, the second positive lens 23, after the first positive lens 22 and the first negative lens 21, reflection through the second catoptron 31, carry out light-splitting processing through the first Amici prism 28 again, form the second beamlet.Detected by 34 pairs of the second beamlets of the second reading microscope, just can be completed the detection to starlight outgoing precision.By the setting of the second catoptron 31, carry out light path and turn back, can reduce the size of whole optical system of star simulator 82, further reduced the size of air-flotation type optical table, also improved the utilization factor in space.
Embodiment tetra-
The lighting system structure schematic diagram of the star simulator that Fig. 5 provides for the embodiment of the present invention four.As shown in Figure 5, in the present embodiment, control module 11 specifically can comprise controller 111 and digital to analog converter 112.Controller 111 produces magnitude digital signal and control signal for the championship indicator signal that is used to indicate the asterism position according to receiving and the magnitude indicator signal that is used to indicate asterism brightness, and output.Digital to analog converter 112 is connected with controller 111, for the magnitude digital signal is passed through to analog-converted, is the magnitude simulating signal, and output.The magnitude digital signal is for controlling the digital signal value of LED brightness, brightness with the simulation asterism, the magnitude digital signal converts the magnitude simulating signal corresponding with this magnitude digital signal to through D/A interface circuit 120, and D/A interface circuit 120 specifically can adopt the DAC0832 chip.
In the present embodiment, light emitting module 13 is a plurality of, and light emitting module 13 has Enable Pin.Correspondingly, illuminator 81 also comprises address decoder 14, address decoder 14 has address signal input end and a plurality of chip selection signal output terminal, the address signal input end is for the control signal of reception control circuit output, the chip selection signal output terminal is corresponding connected one by one with the Enable Pin of light emitting module 13, address decoder 14, for the control signal according to receiving, produces chip selection signal, and by the output of chip selection signal output terminal.Address decoder 14 produces chip selection signal according to control signal, to control a plurality of light emitting module 13 one of them work, by the setting of address decoder 14, can realize the selection of a plurality of light emitting modules 13 is controlled.When the LED quantity of star chart needs is many, can increases in addition control module 11 and can realize the control to LED.
In the present embodiment, the quantity of LED is specifically as follows 121, correspondingly on star chart target incident plate wear 121 installation positions, the front end of installation position is connected with the first aperture arranged on star chart target incident plate, the rear end of installation position be provided with star chart target incident plate on the second aperture of arranging be connected, the diameter in the first aperture is 1 millimeter, and the diameter in the second aperture is 3 millimeters.The second aperture is specifically for LED is installed, and its diameter value specifically can adapt with the size of LED, with the present embodiment, is not limited.The light that LED sends penetrates by the first aperture.
In the present embodiment, light emitting module 13 also comprises a plurality of amplifications and current driving circuit 131, and a plurality of holding circuit 132.Each holding circuit 132 be connected to one amplify and current driving circuit 131 and LED between, holding circuit 132 continues to export to LED for the current output signal by receiving in Preset Time.By the setting of holding circuit 132, can realize that a plurality of LED are simultaneously luminous, the complicacy and the polytrope that have improved star chart.
Embodiment five
The embodiment of the present invention five provides a kind of star sensor ground calibration device, and this star sensor ground calibration device comprises the air-flotation type optical table, also comprises the star simulator that any embodiment of the present invention provides, and star simulator is arranged on the air-flotation type optical table.
Embodiment six
The structural representation of the very Rotating Platform for High Precision Star Sensor ground caliberating device that Fig. 6 provides for the embodiment of the present invention six.As shown in Figure 6, very Rotating Platform for High Precision Star Sensor ground caliberating device is specially star sensor ground calibration device, it comprises, be placed on air-flotation type optical table 1, be arranged at the star chart target 2 on air-flotation type optical table 1, provide the controlled star image simulation matrix form of the single-point illuminator 3 of light source for it after being arranged at star chart target 2, be arranged at the rear computing machine 4 that utilizes the 3 each point light on and off of the controlled star image simulation matrix form of software control single-point illuminator and illumination of star chart target 2, being arranged at the controlled star image simulation matrix form of single-point illuminator 3 rear is the Switching Power Supply 5 for for DC voltage, be arranged at the attenuator 7 that the front optical filter for the simulated spectra wave band 6 of star chart target 2 reaches for the asterism energy of decaying, be arranged in light path and turn to plane mirror 8 for the light path of turning back, be arranged at and turn to after plane mirror 8 for star chart target 2 being imaged on to the long-focus large field projection optical system 9 of infinite distance.Wherein star chart target 2 is for analog starry sky asterism relative position, and asterism spacing positional precision is better than 1 μ m; The controlled star image simulation matrix form of single-point illuminator 3 is variable for the magnitude of realizing the star chart target, the uniform lighting requirement of brightness; Computing machine 4 is controlled light on and off and the illumination of the controlled star image simulation matrix form of single-point illuminator 3 each points for design software; Switching Power Supply 5 is for providing required DC voltage to each circuit part of system; Optical filter 6 is for the 0.5 μ m that realizes very Rotating Platform for High Precision Star Sensor requirement~0.8 μ m spectral range; Attenuator 7, for the asterism output energy of decaying, has attenuation coefficient and is respectively the attenuator of 30% (transmitance T=0.7), 50% (transmitance T=0.5) and 75% (transmitance T=0.25) for selecting; Turn to plane mirror 8 for the light path of turning back to shorten light path; Long-focus large field projection optical system 9 is that a kind of little distortion, wave aberration and ratio chromatism, be comprised of four lens is little, the uniform high imaging quality long-focus large field of disc of confusion projection optical system, completes the high-quality infinite distance imaging to star chart target 2.
Utilize very Rotating Platform for High Precision Star Sensor of the present invention ground caliberating device to carry out the course of work of star image simulation as follows: the star chart target to be arranged on the focal plane of long-focus large field projection optical system, light source by the controlled star image simulation matrix form of single-point illuminator as the star chart target, be formed into the standard analog star chart of picture infinity by the controlled star image simulation matrix form of computer software control single-point illuminator according to Rotating Platform for High Precision Star Sensor visual field very, and there is variable star chart systematic function.Wherein the star chart target is static variable standard source is arranged on the simulator focal plane.The controlled star image simulation matrix form of single-point illuminator coordinates the star chart target that the full variable field of view magnitude of little celestial body target is provided.
The starlight outgoing precision calibration equipment of very Rotating Platform for High Precision Star Sensor provided by the invention ground caliberating device as shown in Figure 1, it comprises, be arranged on the autocollimation plane mirror 50 that the long-focus large field projection optical system 9 front pictures for by the star chart target return, be arranged at the Amici prism 51 after long-focus large field projection optical system 9, be arranged at the front graticule 52 of Amici prism, be arranged at the reading device reading microscope 53 of graticule 52 fronts, be arranged at the gearshift three-dimension adjusting mechanism 54. under reading microscope 53
Utilize the course of work of starlight outgoing precision calibration equipment of very Rotating Platform for High Precision Star Sensor of the present invention ground caliberating device as follows: (1) is designated as with a special standard target outgoing precision that benchmark is demarcated starlight, change star chart target 2 into the standard target, and the standard target cursor position is adjusted on long-focus large field projection optical system 9 focal planes, with the pattern in the controlled star image simulation matrix form of single-point illuminator 3 lighting criteria target (2) standard targets through long-focus large field projection optical system 9, autocollimation plane mirror 50, after returning, Amici prism 51 forms standard target target autocollimation picture on graticule 52, measuring mark on a map the position (3) of each picture point of case autocollimation picture of standard target by reading microscope (for aim at) 53 and three-dimension adjusting mechanism (for measuring displacement) 54 puts on the known pattern position with standard target and compares, if the maximal value of its error is, the error of optical system turns back on image planes after by the autocollimation plane mirror and is exaggerated two times.The measuring error that wherein long-focus large field projection optical system 9 produces is 0.124 "; The standard target adopts laser direct writing equipment to make, and the groove positioning precision is 0.2~0.5 μ m, and the measuring error caused thus is 0.0083 "~0.021 "; The displacement measurement precision of three-dimensional adjusting structure 54 is 1 μ m, and the measuring error caused thus is 0.058 "; Reading microscope 53 adopts the clamp alignment so, and the magnification of choosing reading microscope is 50 *, consequent measuring error is 0.03 "; After error is synthetic, the measuring error of the starlight outgoing precision calibration equipment of very Rotating Platform for High Precision Star Sensor of the present invention ground caliberating device is 0.142 ".
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: its technical scheme that still can put down in writing previous embodiment is modified, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (9)

1. a star simulator, is characterized in that, comprising:
Illuminator, comprise control module, analog switch module, light emitting module, star chart target incident plate and target;
Described control module is for according to what receive, in order to the championship indicator signal of indicating the asterism position with in order to the magnitude indicator signal of indicating asterism brightness, producing control signal and magnitude simulating signal, and output;
Described analog switch module comprises a plurality of analog channels, described analog switch module is connected with described control module, select a described analog channel for the described control signal according to receiving, and the described magnitude simulating signal received is passed through to the described analog channel output of selecting;
Described light emitting module comprises a plurality of amplifications and current driving circuit, with a plurality of LED, described amplification and current driving circuit are corresponding connected one by one with described LED, described amplification and current driving circuit are corresponding connected one by one with the analog channel of described analog switch, described amplification and current driving circuit are for amplifying the described magnitude simulating signal received and the voltage-current transformation processing, the generation current output signal, to drive described LED luminous;
Described a plurality of LED array formula is arranged on described star chart target incident plate;
Be equipped with a plurality of circular holes on described target, the setting corresponding to described LED of described circular hole;
Optical system, comprise the first negative lens, the first positive lens, the second positive lens and the second negative lens, described the first negative lens, described the first positive lens, described the second positive lens and described the second negative lens are successively set on the optical axis of same level light path, the light that described illuminator is sent parallel ejaculation after described the first negative lens, described the first positive lens, described the second positive lens and described the second negative lens.
2. star simulator according to claim 1, is characterized in that, also comprises:
Optical filter, be arranged between described illuminator and described optical system, for the light that described illuminator the is sent processing that filters;
Attenuator, be arranged between described optical filter and described optical system, for the light that will penetrate from described optical filter, carries out attenuation processing.
3. star simulator according to claim 1, is characterized in that, described optical system also comprises:
The first catoptron, be arranged on the back of described the second negative lens, the directional light former road reflection of described the first catoptron for penetrating from described the second negative lens, and described directional light is 0 degree to the incident angle of described the first catoptron;
The first Amici prism, be arranged between described illuminator and described the first negative lens, described the first Amici prism is given described the first negative lens for the light transmission that will send from described illuminator, and the light that will penetrate from described the first negative lens carry out light-splitting processing, forms the first beamlet;
The first reading microscope, for being detected described the first beamlet.
4. star simulator according to claim 1, is characterized in that, described optical system also comprises:
The first catoptron, reflect to described the first negative lens for the light that described illuminator is sent, and the light that described illuminator is sent is 10 degree to the incident angle of described the first catoptron;
The second catoptron, be arranged on the back of described the second negative lens, the directional light former road reflection of described the second catoptron for penetrating from described the second negative lens, and described directional light is 0 degree to the incident angle of described the second catoptron;
The first Amici prism, be arranged between described illuminator and described the first catoptron, and be arranged on the light path of described illuminator, the light transmission that described the first Amici prism is used for described illuminator is sent is to described the first catoptron, and the light that will return through described the first mirror reflects carries out light-splitting processing, form the first beamlet;
The first reading microscope, for being detected described the first beamlet.
5. according to the arbitrary described star simulator of claim 1-4, it is characterized in that, described control module comprises:
Controller, produce magnitude digital signal and control signal for the championship indicator signal that is used to indicate the asterism position according to receiving and the magnitude indicator signal that is used to indicate asterism brightness, and output;
Digital to analog converter, be connected with described controller, for described magnitude digital signal is passed through to analog-converted, is the magnitude simulating signal, and output.
6. star simulator according to claim 5 is characterized in that:
Described light emitting module is a plurality of, and described light emitting module has Enable Pin;
Correspondingly, described illuminator also comprises address decoder, described address decoder has address signal input end and a plurality of chip selection signal output terminal, described address signal input end is for receiving the control signal of described control circuit output, described chip selection signal output terminal is corresponding connected one by one with the Enable Pin of described light emitting module, described address decoder, for the control signal according to receiving, produces chip selection signal, and by described chip selection signal output terminal output.
7. star simulator according to claim 1 is characterized in that:
The quantity of described LED is 121, correspondingly on described star chart target incident plate wear 121 installation positions, the front end of described installation position is connected with the first aperture arranged on described star chart target incident plate, the rear end of described installation position be provided with described star chart target incident plate on the second aperture of arranging be connected, the diameter in described the first aperture is 1 millimeter, and the diameter in described the second aperture is 3 millimeters.
8. star simulator according to claim 6, it is characterized in that: described light emitting module also comprises a plurality of holding circuits;
Each described holding circuit is connected between a described amplification and current driving circuit and described LED, and described holding circuit for continuing to export to described LED by the described current output signal received in Preset Time.
9. a star sensor ground calibration device, comprise the air-flotation type optical table, it is characterized in that: also comprise described star simulator as arbitrary as claim 1-8, described star simulator is arranged on described air-flotation type optical table.
CN 201110256960 2010-10-22 2011-09-01 Star simulator and star sensor ground calibration device CN102426026B (en)

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