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Error correction method for solar facula mass center and solar output angle of solar facula mass center

A technology of error correction and output angle, which is applied in the field of optical sensors, can solve the problems of complex calculation and incomplete correction factors, and achieve the effects of saving computing resources, simplifying error correction theory, and reducing complexity

Active Publication Date: 2013-09-25
HARBIN INST OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of complicated calculation and incomplete correction factors in the error correction of the centroid of the sun spot and its solar output angle in general, and provides a brand-new error correction method of the centroid of the sun spot and its sun output angle

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  • Error correction method for solar facula mass center and solar output angle of solar facula mass center
  • Error correction method for solar facula mass center and solar output angle of solar facula mass center
  • Error correction method for solar facula mass center and solar output angle of solar facula mass center

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specific Embodiment approach 1

[0027] Specific embodiment one: a kind of brand-new error correction method of solar spot centroid and its solar output angle of this embodiment is realized according to the following steps:

[0028] Step 1: Correct the translation error of the sun spot centroid;

[0029] Step 2: Correct the z-axis rotation error of the center of mass of the sun spot;

[0030] Step 3: Correct the x and y axis rotation errors of the center of mass of the sun spot and calculate the sun output angle.

[0031] figure 2 is a schematic diagram of the spot centroid of the sun sensor and the sun output angle, where h is the distance between the photosensitive surface and the mask, α, β are the output angles of the sun sensor, (X C , Y c ) is the barycenter coordinate of the sun spot;

[0032] image 3 It is a schematic diagram of the imaging of solar facula under ideal conditions. At this time, the arctangent method can be used to directly calculate the solar output angle:

[0033] ...

specific Embodiment approach 2

[0088] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: in step 1, in correcting the translation error of the sun spot centroid, the z-axis translation error refers to the distance between the photosensitive surface of the sun sensor and the mask The translation error of H, the expression of the translation error correction model is:

[0089] X c 1 = X c 0 ± Δx Y c 1 = Y c 0 ± Δy ...

specific Embodiment approach 3

[0091] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the correction of the z-axis rotation error of the center of mass of the sun spot in step 2 is realized by using the method of phase rotation based on coordinates. According to the actual sun spot image, The expressions involved in the revised model are:

[0092] x c 2 i = | x c 1 i - S | y c 2 i = | ...

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Abstract

The invention discloses an error correction method for a solar facula mass center and a solar output angle of the solar facula mass center, belongs to the technical field of optical sensors in spacecraft posture adjustment control systems, and especially relates to an error correction method for a solar facula mass center and a solar output angle of the solar facula mass center in a sun sensor. The invention aims at solving the problems that complex calculations and incomplete correction factors exist in general error correction methods for solar facula mass centers and solar output angles of the solar facula mass centers. The error correction method comprises the following steps of step 1, correcting translational errors of the solar facula mass center; step 2, correcting Z-axis rotation errors of the solar facula mass center; and step 3, correcting X-axis rotation errors and Y-axis rotation errors of the solar facula mass center and calculating the solar output angle. The error correction method for the solar facula mass center and the solar output angle of the solar facula mass center belongs to the technical field of optical sensors.

Description

technical field [0001] The invention belongs to the technical field of optical sensors in spacecraft attitude adjustment control systems, and in particular relates to a method for correcting errors of sun facula centroids and sun output angles of sun sensors. Background technique [0002] The sun sensor is widely used in the attitude control system of satellites and other spacecraft. It mainly calculates the sun output angle by solving the center of mass of the sun and coordinate transformation, and using the corresponding calibration parameters. From the original 0-1 solar sensor to the widely used COMS APS solar sensor, the solar centroid algorithm has always been the focus of research in the industry, and the error correction method of the spot centroid and its solar output angle is one of its key technologies. A set of efficient error correction methods is the guarantee for the accurate output of the sun output angle. In the field of solar sensor research, the Jet Propu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00G01C21/02
Inventor 付方发傅永杰王进祥刘鹏飞
Owner HARBIN INST OF TECH