On the usefulness of persistent excitation in ARX adaptive tracking

Details On the usefulness of persistent excitation in ARX adaptive tracking On the usefulness of persistent excitation in ARX adaptive tracking

2009-03-14

arxiv.org/abs/0903.2572v1

Mathematics

Probability

Scientific paper

The usefulness of persistent excitation is well-known in the control community. Thanks to a persistently excited adaptive tracking control, we show that it is possible to avoid the strong controllability assumption recently proposed in the multidimensional ARX framework. We establish the almost sure convergence for both least squares and weighted least squares estimators of the unknown parameters. A central limit theorem and a law of iterated logarithm are also provided. All this asymptotical analysis is related to the Schur complement of a suitable limiting matrix.

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