Vector-matching based automatic mutual verification method of multiple sensors on satellite

A technology of vector matching and sensors, which is applied in the direction of aerospace vehicles, aircraft, space navigation equipment, etc., can solve problems such as the inability to judge the correctness of sensors independently, and achieve the effect of a reliable matching method

Active Publication Date: 2016-05-04
INNOVATION ACAD FOR MICROSATELLITES OF CAS
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Problems solved by technology

However, for the slow-changing fault signal of the sensor, at present, the satellite

Method used

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  • Vector-matching based automatic mutual verification method of multiple sensors on satellite
  • Vector-matching based automatic mutual verification method of multiple sensors on satellite
  • Vector-matching based automatic mutual verification method of multiple sensors on satellite

Examples

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[0017] In the following, the actual application of the mutual verification of a certain satellite on-orbit sensor is taken as a typical example to describe the specific implementation of the present invention in detail. The satellite is equipped with 3 star sensors, 2 gyroscopes, 3 too sensors, and 1 ground sensor. The mutual check priority is sorted from high to low according to the reliability of each sensor as follows, star sensitive, too sensitive, and ground sensitive. Sensitive, top. The matching threshold is appropriately selected according to the measurement and installation accuracy of each sensor, while considering a certain margin. according to figure 1 The flow shown is for mutual sensor verification.

[0018] Step 1. Self-judgment of the output validity of the sensor.

[0019] Judge the validity of the output data of the sensor. Combining the characteristics of the stand-alone machine, the data that is obviously not logical or out of range and the abnormal data of t...

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Abstract

The invention provides a method for automatically conducting mutual verification through measured output information of multiple posture sensors on a satellite, by the adoption of the method in the in-orbit operation period of the satellite, correctness of output of all posture sensors can be verified automatically, and it is guaranteed that the satellite obtains correct posture measurement information. The multi-sensor mutual verification method includes the following steps that 1, effectiveness self-judgment is conducted on output data of all the posture sensors; 2, mutual verification is conducted on multiple satellite sensors through an optical axis vector matching method; 3, mutual verification is conducted on the satellite sensors and a sun sensor through a sun vector matching method; 4, mutual verification is conducted on the satellite sensors and an earth sensor through a geocentric vector matching method; 5, mutual verification is conducted on the satellite sensors and a gyroscope through a angular velocity vector matching method; 6, mutual verification is conducted on the satellite sensors and the sun sensor through a sun and earth included angle matching method. By means of the method, the sensor with the correct output can be verified.

Description

technical field [0001] The invention belongs to the technical field of spacecraft attitude measurement, and relates to a method for mutual verification by using the measurement data output by a plurality of sensors on a satellite and using the vector (sun, earth, optical axis, etc.) matching principle. Background technique [0002] The correct attitude can guarantee the energy of the satellite, as well as the pointing of the measurement and control and load antenna, which is a prerequisite for the normal execution of the satellite's mission. The sensors used to obtain attitude information on satellites mainly include star sensors, sun sensors, earth sensors, and gyroscopes. A single sensor or a combination of sensors can be used to determine the satellite attitude. Therefore, the correctness of the sensor measurement information is particularly important, which directly determines the correctness of the satellite attitude. [0003] Usually, satellites use methods such as th...

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Application Information

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IPC IPC(8): B64G1/28B64G1/36
CPCB64G1/28B64G1/361B64G1/363B64G1/365
Inventor 张锐白涛熊淑杰武国强王昊光李笑月
Owner INNOVATION ACAD FOR MICROSATELLITES OF CAS
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