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- W2000290430 abstract "Disturbances that arise in material removal by repeated attempts to track the same path have the particular characteristics of non-repetitive magnitudes, but nearly-repetitive or gradual gradient transitions. This paper proposes and validates Iterative Learning Control (ILC) with a PD-type learning function for this class of disturbance as a predictive controller for autonomous excavation. However, parameters of the PD learning function may require different tunings for different excavation conditions, and convergence can be slow when compared to changes in excavation dynamics. In order to improve convergence, a plant inversion learning function is reinterpreted as a disturbance observer in the iteration domain, effectively rendering a disturbance learning controller (DLC). A hydraulic mini-excavator was used to evaluate experimentally the performance of the conventional ILC and the DLC against a robust controller. ILC achieved a desired cut profile with non-monotonic transients and DLC converged faster by learning disturbances directly from command discrepancies." @default.
- W2000290430 created "2016-06-24" @default.
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- W2000290430 date "2012-10-01" @default.
- W2000290430 modified "2023-09-24" @default.
- W2000290430 title "Learning disturbances in autonomous excavation" @default.
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- W2000290430 doi "https://doi.org/10.1109/iros.2012.6385566" @default.
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