Robust adaptive estimation of nonlinear system with time-varying parameters

摘要

The vast majority of available parameter estimation methods assume that the parameters to be estimated are constant or slowly time-varying and mainly depend on a predictor or observer design so that a large adaptive gain must be used to achieve fast adaptation; this may result in high-frequency oscillations when the system subjects to a large source of uncertainties or disturbances. This paper is concerned with adaptive online estimation of time-varying parameters for two kinds of linearly param