Multi-gyroscope fault diagnosis and reconstruction method based on non-homogeneous equation solution

A homogeneous equation and fault diagnosis technology, applied in measurement devices, instruments, etc., can solve the problems of large control system influence, gyro failure, weak algorithm generality, etc., and achieve the effect of wide application range and fast self-reconfiguration design.

Active Publication Date: 2020-09-08
BEIJING INST OF CONTROL ENG
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of the space environment or the long-term aging of equipment, it is not ruled out that the gyroscope will fail for a short time or even fail to recover.
However, compared with other sensors, the problem of gyroscopes has a great impact on the control system. Therefore, the control system must have the design capabilities of anomaly detection, positioning and self-reconfiguration for multiple gyroscopes.
[0003] The existing standard algorithms are limited to the detection and positioning of gyroscopes, and cannot directly perform self-reconfiguration operations on gyroscope groups, and the generality of the algorithms is relatively weak

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-gyroscope fault diagnosis and reconstruction method based on non-homogeneous equation solution
  • Multi-gyroscope fault diagnosis and reconstruction method based on non-homogeneous equation solution
  • Multi-gyroscope fault diagnosis and reconstruction method based on non-homogeneous equation solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] The invention provides a multi-gyroscope fault diagnosis and reconstruction method based on the solution of non-homogeneous equations. The satellite is equipped with 7 gyroscopes, which mainly measure the angular velocity of the output star. When a gyroscope is abnormal, the abnormal gyroscope is located by this algorithm. And give the output of the reconstructed stellar angular velocity.

[0125] (1) Establish non-homogeneous equations and general correlation equations

[0126] The known gyro i installation matrix is The measured angular velocity is w g1 , the three-axis angular velocity of the control system is w x 、w y 、w z ,make

[0127]

[0128] C 1

0.577350269189626 0.000000000000000 0.816496580927726 C 2

0.577350269189626 -0.524833885571765 0.625472668645329 C 3

0.577350269189626 -0.707106781186548 -0.408248290463863 C 4

0.577350269189626 -0.279258277633819 -0.767255811994708 C 5

0.577350269189626 0.7...

Embodiment 2

[0203] Simulation conditions: Gyro 1 and 9 are abnormal. Threshold δ i =0.1, i=1,...,9

[0204] Calculate through the method that the present invention proposes, obtain the column number of X and calculate the residual value, see the following table:

[0205] column number residual 1 -1 6 0.844029628745985 7 0.347296355333861 8 -2.87938524157181 9 1.13715804260326

[0206] That is, if the equations 1, 6, 7, 8, and 9 exceed the given threshold of 0.1, it can be seen from Table 2 that gyro 1 and gyro 9 are abnormal. Then the three-axis angular velocity of the star is

[0207]

[0208]

[0209]

[0210] The method of the present invention can simultaneously determine the number of abnormal gyroscopes in the gyroscope group through the decoupling method, and replace the abnormal gyroscopes with normal gyroscopes to give the correct result of the three-axis angular velocity of the star.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a multi-gyroscope fault diagnosis and reconstruction method based on a non-homogeneous equation solution, which is suitable for a spacecraft for measuring a plurality of gyroscopes. According to the method, a general non-homogeneous equation set described by m gyroscopes is solved, the equation set contains three unknown quantities and m equations, and through equivalent transformation, the satellite three-axis angular velocity described by m gyroscope measurement values and m-3 groups of gyroscope associated equations are obtained. By processing the associated equations of the gyroscopes, not only can the fault location of a plurality of gyroscopes be quickly realized, but also a plurality of problem gyroscopes can be avoided at the same time to realize the quickself-reconfiguration design of the gyroscope group. The invention provides a universal design method for multi-gyroscope anomaly positioning and reconstruction, is wide in application range, and is suitable for gyroscope autonomous anomaly positioning and reconstruction design of satellites of various models.

Description

technical field [0001] The invention relates to a multi-gyroscope fault diagnosis and reconstruction method, which belongs to the technical field of satellite fault diagnosis and fault-tolerant control. Background technique [0002] With the in-depth application of satellites in various fields, the structure of the whole satellite tends to be complex, and the mission requirements are also improved from general accuracy to ultra-high and very high-precision, from long-term relative reference static state to continuous large-scale maneuver or short-term fast machine. Dynamic changes, even for communication satellites, there are 24-hour uninterrupted service requirements during the service life of more than ten years. For this reason, the configuration of the number of gyroscopes has been added to the satellite's control system. However, due to the impact of the space environment or the long-term aging of equipment, it is not ruled out that the gyroscope will fail for a short ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 刘洁武云丽林波刘文静刘成瑞王淑一
Owner BEIJING INST OF CONTROL ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap