Abstract
For the nonlinear system with gain fault, an alternative estimation method is given in this paper. Firstly, a joint estimation is presented to estimate the system state and the gain fault synchronously, based on the joint system function of the state evolution process and the gain evolution process. Then, an alternative estimation method is developed, which includes the state estimation process and the fault estimation process. Compared with the joint estimation method, the alternative method reduces the dimension of each sub-system, further reduces the computation requirement. The final simulation result shows that the feasibility and the effectiveness of the alternative method.
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