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Robust detection and isolation of failures in satellite attitude sensors and gyro

Ahmadi, B ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1017/S0263574711001391
  3. Publisher: 2012
  4. Abstract:
  5. Summary Reliability of a satellite attitude control system depends on accurate detection of failures in its sensors. This paper presents an observer for robust detection and isolation of a class of failures in satellite attitude sensors. The proposed observer uses measurement of a three-axis gyro together with only one attitude sensor, and generates a residual signal which is sensitive to faults and is simultaneously robust against disturbance and noise. A nonlinear model of satellite kinematics is considered for design of the observer. The structure of the observer is in the form of a delayed continuous-time differential equation ensuring its robustness properties. A realistic simulation is provided to illustrate the performance of the proposed observer in the face of the faults occurring in a magnetometer, as the attitude sensor, and also the faults occurring in the gyro
  6. Keywords:
  7. Mobile robots ; Navigation ; Pose estimation and registration ; Robotic self-diagnosis and self-repair ; Attitude sensors ; Continuous time ; Non-linear model ; Pose estimation ; Realistic simulation ; Residual signals ; Robust detection ; Robustness properties ; Satellite attitude ; Satellite attitude control systems ; Self-diagnosis ; Three-axis ; Automation ; Differential equations ; Gyroscopes ; Robotics ; Sensors
  8. Source: Robotica ; Volume 30, Issue 7 , 2012 , Pages 1157-1166 ; 02635747 (ISSN)
  9. URL: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8725027&fileId=S0263574711001391