A bias-correction method for closed-loop identification, the bias-eliminated least squares (BELS) method, is shown to be equivalent to a basic instrumental variable (IV) estimator applied to a predictor for the closed-loop system. This predictor is a function of the plant parameters and the known controller. Corresponding to the related method using a least squares criterion, the method is referred to is the tailor-made IV method for closed-loop identification. The indicated equivalence greatly facilitates the understanding and the analysis of the BELS method
Published in:
Decision and Control, 2001. Proceedings of the 40th IEEE Conference on
(Volume:5
)
Date of Conference: 2001