Observers for sampled data nonlinear systems via numerical differentiation

An observer structure has been proposed in the early 2000 years with features such as “nonpeaking”, “bounded” and with quasi explicit algorithms for its design. These new potentialities are attribuable to both the structure of the data feedback and the introduction of regularized numerical differentiation schemes of sampled data. This communication proposes a detailed examination of the latter differentiation schemes in view of their practical use within this observer structure.