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
CN108645407BActive Publication Date: 2022-06-07ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2022-06-07

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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.
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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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