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Infrared measurement based system and method thereof for determining relative state of inner satellite

A technology of outer satellite and positioning system, which is applied in the field of relative state determination system of inner satellite based on infrared measurement, to achieve a clear effect in the locking and releasing phase

Inactive Publication Date: 2012-07-11
TSINGHUA UNIV
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Problems solved by technology

For example, for high-precision measurement of the earth's gravity field, it is required to be less than 1×10 -10 m / s 2 , which makes the interference introduced by any active measurement method non-negligible

Method used

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  • Infrared measurement based system and method thereof for determining relative state of inner satellite
  • Infrared measurement based system and method thereof for determining relative state of inner satellite
  • Infrared measurement based system and method thereof for determining relative state of inner satellite

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Embodiment Construction

[0025]

[0026] Relation (1) can be obtained through the following derivation:

[0027] The imaging grayscale of a general object is related to the emissivity, reflectivity and emissivity of the surrounding objects of the object itself, that is

[0028] Imaging grayscale = K × (emissivity of the object itself + emissivity of peripheral objects × reflectivity of the object itself)

[0029] where K is a constant.

[0030] Be specific to the system of the present invention then have:

[0031] Foreground imaging gray scale = K × (inner satellite emissivity + outer cavity inner wall emissivity × inner satellite reflectivity) (2)

[0032] Background imaging grayscale = K × (emission rate of the inner wall of the outer satellite cavity + emissivity of the inner satellite × reflectance of the inner wall of the outer satellite cavity) (3)

[0033] For relational expression (2), since the reflectivity of the inner satellite + the absorption rate of the inner satellite = 1, there a...

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Abstract

The invention discloses an infrared measurement based system and a method thereof for determining the relative state of an inner satellite, belonging to the technical field of spacecraft system technologies and measuring instruments. The state determining system comprises an inner satellite, an outer satellite cavity, an infrared positioning system and an inner satellite locking and releasing mechanism, wherein the inner satellite and the outer satellite cavity are subjected to surface processing, have different emission properties and can present images with different gray scales in the infrared positioning system under the condition of no illumination so as to achieve the function of acquiring the three-dimensional motion state of the inner satellite and finish a key measuring task of an inner formation under the condition of not generating disturbing force.

Description

technical field [0001] The invention relates to the technical fields of spacecraft systems and gravitational measurement, in particular to a system and method for determining the relative state of an inner satellite based on infrared measurement. Background technique [0002] Using the proof mass (PM) to conduct orbital flight along the geodesic line is a method for scientific tasks such as satellite gravitational field measurement and space gravitational detection. The inner satellite in the inner formation system flies freely in the cavity of the outer satellite, and the cavity of the outer satellite shields the inner satellite from non-gravitational interference such as atmospheric resistance and solar light pressure, so the inner satellite will follow a purely gravitational orbit under the action of gravity Flying plays a role in verifying the quality. When the inner formation system is working in orbit, the outer satellites measure the relative position and velocity of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V8/00G01S17/50G01S17/66
Inventor 王兆魁张育林范丽韩大鹏刘昆项军华张峰谷振丰
Owner TSINGHUA UNIV
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