Device and method for implementing compound drag-free mode for high-precision autonomous navigation

An autonomous navigation, no tow technology, applied in the field of no tow satellite systems, can solve problems such as light pressure interference, and achieve the effects of reducing interference, improving accuracy, and compact overall structure

Active Publication Date: 2022-06-07
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

However, active lighting will cause light pressure interference to the inspection quality, and it is necessary to carefully control the power of the projected light and maintain the uniformity and symmetry of the lighting

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  • Device and method for implementing compound drag-free mode for high-precision autonomous navigation
  • Device and method for implementing compound drag-free mode for high-precision autonomous navigation
  • Device and method for implementing compound drag-free mode for high-precision autonomous navigation

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Embodiment Construction

[0041] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0042] The present invention provides a device for realizing a composite drag-free mode for high-precision autonomous navigation, including a laser array 11 , a laser beam shaping device 12 , a proof mass 13 , a photoelectric conversion array 14 , a data processing module 15 , and a spacecraft cavity 16 , shaping the laser input window 17 and mirror 18, such as figure 1 shown.

[0043] The laser array 11 is composed of N lasers, where N is an even number and N is not less than 2. In this embodiment, the laser is a single-frequency laser of 1064 nm, which can provide a laser with stable power and frequency, the laser light intensity follows a Gaussian distribution, and the output power is in the order of milliwatts.

[0044] The mirror 18 adjusts the optical path of the N beams of laser light output by the laser array 11 and sends them to the laser bea...

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Abstract

The invention provides a device and method for implementing a compound drag-free mode for high-precision autonomous navigation, including a laser array, a laser beam shaping device, a proof mass, a photoelectric conversion array, a data processing module, a spacecraft cavity and an input window. The laser beam shaping device divides the beam emitted by the laser into left and right parts, and after shaping, a rectangular beam is obtained and distributed to the input window; the rectangular beam enters the cavity of the spacecraft through the left input window and the right input window respectively, and is detected by the photoelectric conversion array ; The photoelectric conversion array converts the detected optical signal into an electrical signal output power to the data processing module; the data processing module solves the power of the proof mass according to the relationship between the power difference at two different moments and the relative position of the proof mass Relative position and relative acceleration magnitude. The invention adopts pure optical measurement means, can simultaneously complete the measurement of relative displacement and non-conservative force acceleration, and improves the interference suppression to the inspection quality.

Description

technical field [0001] The invention relates to the technical field of drag-free satellite systems, in particular to a device and method for realizing a composite drag-free mode for high-precision autonomous navigation. Background technique [0002] The no-tow satellite is mainly composed of inspection mass and satellite body. The inspection mass is located inside the satellite cavity. The satellite cavity is equivalent to a barrier, which can shield the external environment interference. Therefore, ideally, the inspection mass is only affected by gravity, and its orbit is a pure gravitational orbit. However, due to the disturbance of the external environment, the satellite body will have a relative displacement with the inspection mass. The satellite uses the thrust generated by the thruster to make itself follow the inspection mass block, that is, the center of mass of the satellite and the center of mass of the inspection mass always coincide, so the satellite body can al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/20G01C21/24
CPCG01C21/20G01C21/24Y02T90/00
Inventor 傅江良甘庆波
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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