Abstract
In this paper, the online parameter identification problem of the mathematical model of an unmanned surface vehicle (USV) considering the characteristics of the actuator is studied. A data-driven mathematical model of motion is very meaningful to realize trajectory prediction and adaptive motion control of the USV. An interactive identification algorithm (ESO–MILS, extended state observer–multi-innovation least squares) based on ESO is proposed. The robustness of online identification is improved by expanding the state observer to estimate the current disturbance without making artificial assumptions. Specifically, the three-degree-of-freedom dynamic equation of the double propeller propulsion USV is constructed. A linear model for online identification is derived by parameterization. Based on the least square criterion function, it is proved that the interactive identification method with disturbance estimation can improve the identification accuracy from the perspective of mathematical expectation. The extended state observer is designed to estimate the unknown disturbance in the model. The online interactive update improves the disturbance immunity of the identification algorithm. Finally, the effectiveness of the interactive identification algorithm is verified by simulation experiment and real ship experiment.
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This work was supported by the National Natural Science Foundation of China (No. 52271367).
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Xiong, Y., Wang, X. & Zhou, S. Online interactive identification method based on ESO disturbance estimation for motion model of double propeller propulsion unmanned surface vehicle. Control Theory Technol. (2024). https://doi.org/10.1007/s11768-024-00201-1
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DOI: https://doi.org/10.1007/s11768-024-00201-1