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System error correction method of autonomous navigation sensor by using yaw maneuvering

A technology of autonomous navigation and system error, applied in the direction of integrated navigator, etc., can solve the problem of poor observability of error

Active Publication Date: 2014-07-02
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0005] The technical solution problem of the present invention is: to overcome the deficiencies in the prior art, propose a kind of method that utilizes satellite yaw maneuvering to correct the error of the autonomous navigation sensor system, solve the problem that the original navigation system has poor observability of the error of the autonomous navigation sensor system , better on-orbit calibration and compensation for navigation sensor system errors, thereby improving the accuracy of the navigation system

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  • System error correction method of autonomous navigation sensor by using yaw maneuvering
  • System error correction method of autonomous navigation sensor by using yaw maneuvering
  • System error correction method of autonomous navigation sensor by using yaw maneuvering

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Embodiment Construction

[0049] Such as figure 1 Shown, the present invention is concretely realized as follows:

[0050] (1) Define the coordinate system: the origin of the inertial system is at the center of the earth, the positive direction of the X-axis is along the intersection line between the equatorial plane and the ecliptic plane of the earth, pointing to the vernal equinox, the Z-axis is the normal line of the equatorial plane, and the positive direction points to the North Pole, and the Y-axis and The X and Z axes form a right-handed system; the origin of the orbital system is at the center of mass of the satellite, moving along the orbit with the satellite, the Z-axis points to the center of the earth, the X-axis is perpendicular to the Z-axis and points to the satellite speed direction, and the Y-axis forms a right-handed relationship with the X and Z axes system; the satellite system is a coordinate system established based on the satellite structure, the origin is a point fixed on the s...

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Abstract

The invention discloses a system error correction method of an autonomous navigation sensor by using yaw maneuvering, comprising the following steps: observing the earth by the autonomous navigation sensor to obtain the earth direction vector and geocentric distance of a satellite system, observing stars by the autonomous navigation sensor to obtain the pose transform matrix from an inertial system to the satellite system, combining the two observation results to obtain the earth direction and geocentric distance in the inertial system to determine a satellite orbit. According to the invention, the autonomous navigation sensor system error is extended to a state variable, and the deviation self-calibration is carried out by using the earth direction and geocentric distance as the measured values; the mostly studied idea of moving-base alignment in the field of the inertial navigation system is used for reference, and yaw maneuvering is used for raising the observability of the sensor system error of the navigation system, thus the estimation and compensation of the sensor system error can be well carried out. The method has simple operation, and can significantly raise the autonomous navigation precision.

Description

technical field [0001] The invention relates to an error correction method of an autonomous navigation sensor system utilizing yaw maneuvering, and belongs to the technical field of spacecraft autonomous navigation. Background technique [0002] Autonomous navigation technology means that the satellite only relies on on-orbit measurement equipment to determine the position and velocity of the satellite in real time without relying on the support of the ground system, also known as autonomous orbit determination. For satellite systems, autonomous navigation is beneficial to reduce the dependence of satellites on the ground and improve the survivability of satellite systems. Maintain, which is very important for military satellites. In addition, autonomous navigation can also effectively reduce the burden on ground measurement and control stations and reduce ground support costs, thereby reducing the development costs of the entire space program. Autonomous navigation is the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/24
Inventor 魏春岭张斌张青春刘良栋李果亢淼
Owner BEIJING INST OF CONTROL ENG
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