Tiny fault diagnosis for bilinear systems with single input

Aiming at the difficulty of the tiny fault diagnosis, this paper researches the fault diagnosis approach of a class of tiny faults for bilinear systems. First of all, based on reduced-order observer, a fault diagnoser is proposed without using the residual to embody faults, and a diagnosability criterion of faults is given. Then, the solving scheme for parameters of the fault diagnoser is given, and real-time fault diagnosis is realized for tiny faults. The feasibility and validity of the proposed scheme is demonstrated by a simulation example.