A Method for Determining Spacecraft Attitude
A determination method and spacecraft technology, applied in the field of attitude determination of aerospace vehicles, can solve problems such as particle degradation, and achieve the effect of improving the performance of state estimation
Active Publication Date: 2017-08-29
上海航天控制工程研究所
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The purpose of the present invention is to provide a method for determining the attitude of a spacecraft, which can solve the noise problem of non-Gaussian distribution, and can also solve the particle degradation problem of particle filter
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The invention discloses a method for determining the attitude of a spacecraft. In the method, a star sensor and a gyroscope are used as the attitude sensors of the satellite, and a combination of particle filter and extended Kalman filter is used to complete high-precision attitude determination. Aiming at the problem of particle degradation, the traditional nonlinear filtering algorithm is introduced into the particle filter, and a better importance density function is obtained by combining the latest observation values; The hybrid filter method of EKF reduces the amount of calculation, saves a lot of tedious and difficult calculation work, and obtains a high-precision attitude determination algorithm suitable for engineering applications.
Description
A Method for Determining Spacecraft Attitude technical field The invention relates to a method for determining the attitude of an aerospace vehicle, in particular to a particle filter method based on extended Kalman filter. Background technique The attitude determination of the spacecraft is an important part of the attitude control system. The high-precision attitude determination system provides high-precision input parameters for the attitude control algorithm, and is the basis of the high-precision attitude control system. With the development of modern aerospace technology, many tasks have higher and higher requirements for attitude control systems, which also put forward higher requirements for attitude determination. The accuracy of attitude determination is related to the accuracy of the sensor and the attitude determination algorithm. Therefore, it is of great significance to use advanced attitude determination algorithms to determine the attitude of the spacecraf...
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IPC IPC(8): G05D1/08
Inventor 宋婷张树瑜郭文彦
Owner 上海航天控制工程研究所