A simple and robust nonlinear estimator

In an analysis to be published by J.P. Gauthier et al., a simple observer for multiple input single output (MISO) nonlinear systems observable for any input will be discussed. The authors prove the robustness of this observer with respect to bounded modeling errors and bounded variance noises. They present with slight modifications the estimator exhibited in the work at Gauthier et al. The robustness of this estimator is established with respect to bounded modeling errors and bounded variance noises