Abstract
An adaptive fading Kalman observer (AFK) is applied to estimate temperatures along a counter-current heat exchanger. The gain is computed from Riccati equations using an adaptive forgetting factor. The analysis of this gain shows that the estimation error of the tvvo fluids could be decorrelated. Therefore correction could be decoupled even if the model equations are coupled. This result leads to the construction of uncoupling adaptive fading Kalman observer (UAFK). The possible extension of UAFK observer to other coupled transport processes is proposed.
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