Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for determining the diagnosability of spacecraft control systems under the influence of noise

A control system and determination method technology, applied in the direction of instruments, electrical testing/monitoring, special data processing applications, etc., can solve problems such as difficult diagnosability determination, simplify the fault diagnosis process, improve accuracy and robustness, The effect of improving controllability

Active Publication Date: 2017-08-29
BEIJING INST OF CONTROL ENG
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is difficult to generalize and apply to the diagnosable determination of faults in dynamic systems such as spacecraft control systems and actuators

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
  • A method for determining the diagnosability of spacecraft control systems under the influence of noise
  • A method for determining the diagnosability of spacecraft control systems under the influence of noise
  • A method for determining the diagnosability of spacecraft control systems under the influence of noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0094] The spacecraft control system composed of an infrared earth sensor and a gyroscope is an example. The infrared earth sensor and gyroscope are used to measure the attitude angle and angular rate of the spacecraft respectively, and the combined use of the two can achieve high-precision combined attitude determination.

[0095] To simplify the problem description, only the discrete state space model of the y-axis of the spacecraft control system is given here:

[0096]

[0097] In the formula: θ represents the pitch angle of the spacecraft; d y and b y denote the exponentially dependent drift and constant drift terms of the gyroscope, respectively; τ y represents the time constant and dt represents the sampling time interval and dt=0.1s; ω 0 represents the orbital angular velocity of the spacecraft and ω 0 =0.06rad / s;g y Indicates the measurement output of the gyroscope; f gy and f hθ Respectively represent the failure of the gyroscope and the failure of the in...

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 provides a diagnostic determination method for a spacecraft control system under influence of noise. First, a multivariate probability distribution statistic model of the spacecraft control system is built through a standard model and an equivalent space method; then a detectability index is obtained; and fault detectability is determined; finally, an isolability index is obtained, and the fault isolability is determined. According to the diagnostic determination method, influence of process noise, observation noise and other interference factors on diagnostic performance are fully taken into consideration, fault diagnosis algorithms are not required to be designed, and the fault detectability and the isolability can be determined according to system information including kinetics, kinematics, a controller model and the like of the spacecraft control system and the configuration and installation condition of a sensor and an actuator, the fault diagnosis process of the spacecraft control system is simplified, meanwhile, a theoretical basis can be provided for design of a diagnosis algorithm, the design method of the spacecraft control system is optimized, and the controllability of the spacecraft control system is improved.

Description

technical field [0001] The invention relates to a method for determining the diagnosability of a spacecraft control system under the influence of noise, belonging to the field of spacecraft control. Background technique [0002] The control system is an important subsystem to realize the orbit and attitude control of the spacecraft and the drive of various components (such as solar wings, space-borne antennas, etc.). With the development of aerospace technology, the structure and function requirements of the spacecraft control system are becoming more and more complex. For the expensive spacecraft control system, high reliability is the most basic requirement. The function is reduced or lost, and in severe cases, it may even cause catastrophic accidents and huge economic losses. At present, the high reliability of the spacecraft control system is generally guaranteed by the high reliability and redundancy of software / hardware. However, due to objective factors such as the ...

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 Patents(China)
IPC IPC(8): G05B23/02G06F19/00
CPCG05B23/02G16Z99/00
Inventor 王大轶李文博刘成瑞邢琰何英姿
Owner BEIJING INST OF CONTROL ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com