Universal adaptive observer for nonlinear time-varying deterministic systems

Designing adaptive observers for MIMO nonlinear time varying deterministic systems is an open problem. In this paper a novel solution on to this problem is given by use of a “strong tracking fiIter (STF)”. First, the STF is outlined, then some technical points of view to use the STF as an adaptive observer are discussed. Finally, two typical examples are presented to illustrate the effectiveness of the proposed approach.