Method for carrying out measurement on high-frequency attitude of spacecraft by utilizing low-frequency attitude determination sensor

Abstract

The invention belongs to the technical field of attitude and orbit control, and relates to a method for implementing measurement on a high-frequency attitude of a spacecraft by utilizing a low-frequency attitude determination sensor. The method comprises the following steps of: S1, acquiring spacecraft original attitude estimated values by utilizing a conventional attitude determination method; S2, fusing N groups of spacecraft original attitude estimated values with different frequencies; S3, recovering high-frequency-band attitude data from the fused spacecraft original attitude estimated values. The method disclosed by the invention can implement spacecraft high-frequency attitude estimation only by the attitude determination sensor under a conventional sampling frequency, and can reachhigh accuracy; the method utilizes sparsity of a spacecraft high-frequency attitude quantity in a frequency domain; by a compressed sensing technology, the spacecraft high-frequency attitude data canbe recovered from low-frequency attitude measurement data; a simulation result proves that the method can measure a high-frequency attitude and has good robustness for an error. By adding the attitude determination sensor and improving a reconfiguration algorithm, accuracy of measuring the high-frequency attitude can be further improved.

Description

technical field [0001] The invention belongs to the technical field of attitude and orbit control, and relates to a method for measuring the high-frequency attitude of a spacecraft by using a low-frequency attitude-measuring sensor through the principle of compressed sensing. Background technique [0002] High-frequency attitude determination plays a key role in spacecraft attitude control. High-frequency oscillations are a key error source in spacecraft attitude determination. This type of vibration is usually beyond the measurement range of traditional gyroscopes and star sensors. Therefore, the performance of traditional attitude determination systems is always unsatisfactory when high-frequency oscillations exist. [0003] Based on recent studies, we find that there are mainly two typical categories of approaches to deal with high-frequency attitude oscillations. One is to improve the accuracy of the attitude determination and control system to suppress oscillations. ...

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Problems solved by technology

[0004] In order to solve the problem that the existing low-frequency attitude sensor is difficult to measure the high-frequency attitude jitter of the spacecraft, the present invention proposes a method that can use the low-frequency attitude sensor to realize the high-frequency attitude measurement of the spacecraft

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