Small body spinning angular velocity dynamics correcting method

A small celestial body and angular velocity technology, which is applied in the field of deep space exploration, can solve the problems of low estimation accuracy of spin angular velocity of small celestial bodies, low measurement accuracy of optical sensors, and failure to meet requirements, so as to improve orbit and attitude control accuracy and improve safety performance, and the effect of improving accuracy

Active Publication Date: 2020-01-31
BEIJING INSTITUTE OF TECHNOLOGYGY
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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 celestia

Method used

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  • Small body spinning angular velocity dynamics correcting method
  • Small body spinning angular velocity dynamics correcting method
  • Small body spinning angular velocity dynamics correcting method

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[0030] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Such as figure 1 As shown, a small celestial body spin angular velocity dynamic correction method disclosed in this example, the specific implementation method is as follows:

[0032] Step 1: Introduce the spin angular velocity into the estimated system state vector, and establish a small celestial body spin angular velocity dynamics correction state model based on the inter-device measurement under the small celestial body solid-connection system.

[0033] During the process of flying around the small celestial body, the two detectors need to rely on the inter-device ranging information to correct the spin angular velocity of the small celestial body, as well as the position and velocity information of the two detectors. The state vector to be corrected is ...

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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...

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Application Information

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IPC IPC(8): B64G1/24
CPCB64G1/242B64G1/245
Inventor 秦同乔栋黄江川罗燕
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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