Method for calibrating and compensating fine code error of encoding type sun sensor

A solar sensor, error calibration technology, used in instruments, measuring devices, surveying and navigation, etc.

Active Publication Date: 2015-01-14
BEIJING INST OF CONTROL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, a method for calibrating and compensating coded sun sensor fine code errors is proposed, which solves the sinusoidal regular change of the measurement er

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  • Method for calibrating and compensating fine code error of encoding type sun sensor
  • Method for calibrating and compensating fine code error of encoding type sun sensor
  • Method for calibrating and compensating fine code error of encoding type sun sensor

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[0040] The specific realization idea of ​​the present invention is: considering the diffraction of light through the optical system and the system constant error of each optical component relative to the reference mirror of the sun sensor, a unified mathematical model of the fine code error compensation of the sun sensor is established, and then The turntable, the reference mirror of the solar sensor and the solar simulator are established in the same coordinate system, an error calibration system is established, the least square method is used to determine the parameters in the error compensation mathematical model, and finally the error compensation model is encapsulated in the solar sensor. In the processor, the sun sensor outputs the measurement angles of the first optical component and the second optical component in real time.

[0041] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

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Abstract

The invention discloses a method for calibrating and compensating the fine code error of an encoding type sun sensor. The method comprises the following steps: calculating optical diffraction error of the fine code of the encoding type sun sensor and building a uniform mathematical model of fine code compensation for the encoding type sun sensor; building an error calibrating system and obtaining data of calibrating points under all angles of the encoding type sun sensor; then respectively substituting the data of the calibrating points into the mathematical model to obtain a parameter value of the mathematical model, and encapsulating the mathematical model after the parameter is determined into an inner processor of the encoding type sun sensor; and outputting measuring angles after compensating the fine code error in time under any measuring angle by the encoding type sun sensor. By virtue of the method, the problem that the measurement error of the encoding type sun sensor regularly changes in a sine mode along with the angles can be solved; the constant error of the encoding type sun sensor system can be effectively improved; the encoding type sun sensor can be simply mounted; and the calibrating efficiency of the system is improved.

Description

technical field [0001] The invention relates to a method for calibrating and compensating a sun sensor, in particular to a method for calibrating and compensating a small code error of a coded sun sensor, and belongs to the field of calibrating the code error of a coded sun sensor. Background technique [0002] The sun sensor is an important measurement component of the satellite attitude control system, and it is also the earliest attitude sensor used for satellite attitude measurement. It is used to measure the incident angle of the sun relative to the sensor. [0003] The coded sun sensor uses a dedicated integrated silicon photocell as the core device, with a field of view greater than 120°×120° and a comprehensive measurement accuracy of better than 0.1° for the entire field of view. [0004] The optical assembly of the coded sun sensor is used as the angle measuring part. It is mainly composed of a piece of prism glass. Coding patterns with transparent and opaque inte...

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Application Information

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IPC IPC(8): G01C25/00G01C1/00
CPCG01C1/00G01C25/00
Inventor 赵媛吕政欣莫亚男贾锦忠崔坚陈然
Owner BEIJING INST OF CONTROL ENG
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