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Sun synchronous orbit satellite consistency analysis method based on fixed star annual time sequence matching

A sun-synchronous orbit and timing matching technology, applied in special data processing applications, instruments, character and pattern recognition, etc., can solve problems such as difficult to identify satellite telemetry anomalies

Active Publication Date: 2020-09-18
BEIHANG UNIV
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Problems solved by technology

[0006] The embodiment of the present invention provides a sun-synchronous orbit satellite consistency analysis method based on sidereal year time series matching, which solves the problem that it is difficult to identify the small-scale time dimension caused by the time period. The problem of satellite telemetry anomalies

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  • Sun synchronous orbit satellite consistency analysis method based on fixed star annual time sequence matching
  • Sun synchronous orbit satellite consistency analysis method based on fixed star annual time sequence matching
  • Sun synchronous orbit satellite consistency analysis method based on fixed star annual time sequence matching

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Embodiment Construction

[0045] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0046] Consistency analysis of satellite telemetry data is an important means of anomaly detection, and satellite telemetry data has its own characteristics, such as random error points, and anomalies may be manifested in the cumulative time dimension rather than the data amplitude at a certain moment These characteristics make it difficult for the currently applied time series similarity measurement methods, such as Euclidean distance and Pearson distance, to achieve more accurate consistency detection. The present invention adopts a multi-index comprehensive analysis method of large-scale time series matching, and can accurately analyze the consistency of satellites.

[00...

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Abstract

The invention discloses a sun synchronous orbit satellite consistency analysis method based on fixed star annual time sequence matching, and relates to an abnormal state detection technology in an on-orbit operation period of a satellite. The method comprises the following steps: constructing a normal telemetry data set of the sun-synchronous orbit satellite in a fixed star year period according to historical telemetry data related to a calendar date in the fixed star year period of the sun-synchronous orbit satellite; acquiring normal telemetry data corresponding to a calendar date from the normal telemetry data set according to the calendar date of the telemetry data to be detected of the sun-synchronous orbit satellite; determining DTW distances and time domain characteristic deviationsof the two groups of data according to the telemetry data to be detected and the normal telemetry data; and determining whether the telemetry data to be detected is consistent abnormal data or not according to the DTW distance and the time domain feature deviation.

Description

technical field [0001] The invention relates to the technical field of abnormal state detection during satellite in-orbit operation, in particular to a consistency analysis method for sun-synchronous orbit satellites based on sidereal year timing matching. Background technique [0002] Sun-synchronous orbit satellites have an orbital inclination greater than 90° and pass near the poles. Their orbital plane is consistent with the orientation of the sun and moves eastward by 0.9856° every day. Since its orbital plane is consistent with the orientation of the sun, the satellite always passes the same position when it is at the same place, and the satellite operating environment such as illumination and the like is the same when the satellite is at the same place in each sidereal year. A large number of satellite telemetry is closely related to the operating environment of the satellite, and the same telemetry in the same operating environment is highly similar, which provides a...

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Application Information

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IPC IPC(8): G06F30/20G06K9/62
CPCG06F30/20G06F18/22
Inventor 陶来发张统宋登巍杨帆郝杰吕琛
Owner BEIHANG UNIV
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