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Fault diagnosis using cascade H observers with application to spacecraft attitude control

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3 Author(s)
Yulei Wang ; Dept. of Control Sci. & Eng., Harbin Inst. of Technol., Harbin, China ; Guangfu Ma ; Chuanjiang Li

This paper proposes a gyro and star sensor fault diagnosis architecture that designs two groups of cascade H optimal fault observers using LMI for spacecraft attitude control systems and schemes a Compensation PD controller to achieve fault tolerant control. The basic idea of the approach is to identify the gyro fault to good effect first and then makes a further diagnosis for the star sensor based on the former. The H optimal fault observers in design have the robustness with respect to model uncertainties, disturbance and diagnosis uncertainties. The Compensation PD controller ensures the attitude error maintains to a small set around the equilibrium point even though the gyro and star sensor faults occur simultaneously. Simulation results demonstrate the effectiveness and feasibility of the proposed control algorithm.

Published in:

Industrial Electronics and Applications (ICIEA), 2010 the 5th IEEE Conference on

Date of Conference:

15-17 June 2010

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