A NOVEL REDUCED-ORDER FAULT RECONSTRUCTION APPROACH FOR MISMATCHED SYSTEMS, 330-337.
Zhenwen Sheng, Yiheng He, Jing He, and Xinliang Hu
Keywords
Sliding mode observer, reduced-order reconstruction, fault reconstruction
Abstract
In this paper, a reduced-order fault reconstruction approach
is proposed for a mismatched non-linear system with actuator
faults, disturbances and uncertainties. First, such a system is
separated into multiple sub-systems through state transformation,
and then, reduced-order transformation is conducted on the system
to transform the mismatched system into matched sub-systems
to obtain a reduced-order model that is efficient for locally
separating the effects of mismatched faults and disturbances.
Then, a sliding-mode observer is designed for the reduced-order
model by reconstructing the faults using the equivalent output
injection principle. Finally, a fourth-order non-linear aircraft model
is conducted to verify the effectiveness of the proposed method.
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