Performance analysis of robust fault estimation for a class of nonlinear systems

In this paper, performances of robust fault estimation are analyzed for a class of uncertain nonlinear systems. A novel robust fault estimation algorithm is first presented based on the assumption that the state variables are fully available. Then two approaches are provided to improve the speed and accuracy of robust fault estimation: One is the parameter choice of the fault estimation algorithm; the other is introducing a derivative component into the fault estimation algorithm. The main contributions of the study include the presentation and performance analysis of a novel robust fault estimation algorithm. The numerical simulation results demonstrate the effectiveness of the proposed schemes.