Composite drag-free mode realization apparatus for high-precision autonomous navigation, and method thereof

Abstract

The invention provides a composite drag-free mode realization apparatus for high-precision autonomous navigation, and a method thereof. The apparatus comprises a laser array, a laser beam shaping device, an examination mass block, a photoelectric conversion array, a data processing module, a spacecraft cavity and an input window. The laser beam shaping device divides beams emitted by lasers into aleft part and a right part, shapes the left part and the right part of the beams to obtain a rectangular beam, and distributes the rectangular beam to the input window; the rectangular beam enters the spacecraft cavity from a left input window and a right input window respectively, and is detected by the photoelectric conversion array; the photoelectric conversion array converts a detected optical signal into an electrical signal, and outputs the power of the electric signal to the data processing module; and the data processing module resolves the relative position and the relative acceleration of the examination mass block according to the relationship between of a power difference at two different moments and the relative position of the examination mass block. The apparatus and the method, which adopt a pure optical measuring way, can simultaneously measure the relative displacement and the non-conservative force acceleration, and improve the interference suppression of the examination 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 compound drag-free mode for high-precision autonomous navigation. Background technique [0002] The tow-free satellite is mainly composed of the inspection mass and the satellite body. The inspection mass is located inside the satellite cavity. The satellite cavity is equivalent to a barrier, which can shield external environmental interference. Therefore, ideally, the inspection mass is only affected by gravity, and its orbit is a purely 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 bo...

AI Technical Summary

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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