Sensor fault-tolerant observer applied in satellite attitude control

Jiaolong Wei, Zhaohui Cen, Rui Jiang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The observing failure and feedback instability might happen when the partial sensors of a satellite attitude control system (SACS) go wrong. A fault diagnosis and isolation (FDI) method based on a fault observer is introduced to detect and isolate the fault sensor at first. Based on the FDI result, the object system state-space equation is transformed and divided into a corresponsive triangular canonical form to decouple the normal subsystem from the fault subsystem. And then the KX fault-tolerant observers of the system in different modes are designed and embedded into online monitoring. The outputs of all KX fault-tolerant observers are selected by the control switch process. That can make sense that the SACS is part-observed and in stable when the partial sensors break down. Simulation results demonstrate the effectiveness and superiority of the proposed method.

Original languageEnglish
Pages (from-to)99-107
Number of pages9
JournalJournal of Systems Engineering and Electronics
Volume23
Issue number1
DOIs
Publication statusPublished - 1 Feb 2012

Keywords

  • Integrity in closed-loop
  • KX observer
  • Satellite attitude control
  • Triangular canonical form

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering

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