Small body spinning angular velocity dynamics correcting method

Abstract

The invention discloses a small body spinning angular velocity dynamics correcting method, and belongs to the technical field of deep space exploration. The method includes the steps of introducing the spinning angular velocity into an estimation system state vector, establishing a small body spinning angular velocity dynamics correcting state model based on intra-equipment measurement under a small body fixed connection system, establishing a small body spinning angular velocity dynamics correcting observation model based on the intra-equipment measurement with intra-equipment ranging as theobservation amount, correcting the small body spinning angular velocity and the position and speed vectors of two detectors through a nonlinear estimation filtering algorithm in combination with the small body spinning angular velocity dynamics correcting state model and the small body spinning angular velocity dynamics correcting observation model based on the intra-equipment measurement, and establishing a small body detector control system state model through the corrected spinning angular velocity so as to improve the orbit and attitude control precision of the detectors under the small body fixed connection coordinate system and improve the diversion and landing task safety.

Description

technical field [0001] The invention relates to a dynamic correction method for the spin angular velocity of a small celestial body, which belongs to the technical field of deep space detection. Background technique [0002] The spin angular velocity of small celestial bodies is an important physical parameter of small celestial bodies. Determining the spin angular velocity of small celestial bodies is of great significance for analyzing the evolution of small celestial bodies, determining the motion of spacecraft near small celestial bodies, and fixed-point landing sampling. Ground radar and on-orbit optical measurements are conventional methods for estimating the spin angular velocity of small celestial bodies. The angular spin velocity of small celestial bodies can be estimated by receiving periodically changing photometric information through optical sensors. However, the measurement accuracy of the optical sensor is low, resulting in a low estimation accuracy of the spi...

AI Technical Summary

Problems solved by technology

However, the measurement accuracy of the optical sensor is low, resulting in a low estimation accuracy of the spin angular velocity of small celestial bodies, which cannot meet the requirements for high-precision spin angular velocity of small celestial bodies in short-distance detection missions.

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