Method for determining relative attitude of microsatellite by using dual array antenna

A relative attitude, micro-satellite technology, used in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices and other directions, can solve the problems of increasing the size of the spacecraft, failure, and high lighting requirements.

Inactive Publication Date: 2019-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Because this method requires additional sensors and light sources for the spacecraft, it inevitably increases the size of the spacecraft, which is not suitable for tiny satellites, and this method is used when the distance between the master and slave spacecraft is very large. will no longer...

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  • Method for determining relative attitude of microsatellite by using dual array antenna
  • Method for determining relative attitude of microsatellite by using dual array antenna
  • Method for determining relative attitude of microsatellite by using dual array antenna

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Embodiment Construction

[0057] The invention provides a method for determining the relative attitude of micro-satellites by using dual array antennas. Firstly, two array antennas are installed on the master spacecraft, and each slave spacecraft is equipped with receiving array antennas to establish a coordinate system. According to the relative attitude dynamics Equations construct system equations; design each slave spacecraft's array antenna transmit signal and transmit and receive timing; use code division multiple access technology to identify each spacecraft, and make sliding correlation between the output signal and the corresponding detection signal, and obtain each slave at a certain time The LOS path impulse response vector of the spacecraft, respectively determine the angle of arrival and the angle of departure of the two array antennas from the spacecraft to the main spacecraft; use the angle of arrival and the angle of departure to obtain the corresponding unit line-of-sight vector; use the...

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Abstract

The invention discloses a method for determining a relative attitude of a microsatellite by using a dual array antenna. A relative attitude dynamics equation is used as a system equation to form a probe frame, and then a transmitting and receiving timing sequence is designed; two array antennas of a main spacecraft receive a transmitted signal from a slave spacecraft array antenna which is used asan output signal, and moving correlation is carried out according to the output signal and a probe signal, so as to obtain an array impulse response matrix; two-dimensional spectral peak search is performed to obtain two sets of wave leaving angles and wave arrival angles; four unit line-of-sight vectors are obtained by using the two sets of wave leaving angles and wave arrival angles; a measurement equation is constructed by using the bidirectional unit line-of-sight vectors and a relative attitude rotation matrix to obtain a measurement noise variance matrix; the TRIAD algorithm is used toobtain an attitude quaternion at the initial moment; and then the relative attitude and a relative rotational angular velocity which are convergent gradually are obtained according to the system equation and the measurement equation. The method for determining the relative attitude of the microsatellite by using the dual array antenna has low computational complexity, high estimation precision andwide application range.

Description

technical field [0001] The invention belongs to the technical field of determining the relative attitude of micro-satellite formations, and in particular relates to a method for determining the relative attitude of micro-satellites by using dual array antennas. Background technique [0002] Microsatellites have a series of advantages such as light weight, small size, high technical content, and short development cycle. In addition, they can also adopt modular design technology and standardized stars, mass-produce and store them on the assembly line, and facilitate mobile launches. It is also possible to use new technological achievements such as distributed constellations, formations, or the introduction of artificial intelligence, and use smart constellations to complete more complex application tasks, which cannot be accomplished with traditional large satellites. Therefore, microsatellites are widely used in military or civilian fields, including commercial communications...

Claims

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Application Information

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IPC IPC(8): G01S19/53
CPCG01S19/53
Inventor 袁源王姣张若南孙冲张博
Owner NORTHWESTERN POLYTECHNICAL UNIV
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