A systematic design method for reducing bias in observers is developed. The method utilizes an observable default model of the system together with measurement data from the real system and estimates a model augmentation. The augmented model is then used to design an observer which reduces the estimation bias compared to an observer based on the default model. Three main results are a characterization of possible augmentations from observability perspectives, a parameterization of the augmentations from the method, and a robustness analysis of the proposed augmentation estimation method. The method is applied to a truck engine where the resulting augmented observer reduces the estimation bias by 50% in a European transient cycle. © 2008 Elsevier Ltd. All rights reserved.
CITATION STYLE
Höckerdal, E., Frisk, E., & Eriksson, L. (2009). Observer design and model augmentation for bias compensation with a truck engine application. Control Engineering Practice, 17(3), 408–417. https://doi.org/10.1016/j.conengprac.2008.09.004
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