In this paper, we develop the equations of motion at low-speed of a swimming robot for tank floor inspection. The proposed dynamic model incorporates a new friction drag force model for low-speed streamlined swimming robots. Based on a boundary layer theory analysis, we prove that for low-speed maneuvering case (Re from 103 to 105), the friction drag force component is nonlinear and is not insignificant, as previously considered. The proposed drag viscous model is derived based on hydrodynamic laws, validated via computational fluid dynamics (CFD) simulations, and then experimental tests. The model hydrodynamic coefficients are estimated through CFD tools. The robot wheels friction LuGre model is experimentally identified. Extensive experimental tests were conducted on the swimming robot in a circular water pool to validate the complete dynamic model. The dynamic model developed in this paper may be useful to design model-based advanced control laws required for accurate maneuverability of floor inspection swimming robots.
Modeling and Parameter Identification of an In-Tank Swimming Robot Performing Floor Inspection
BP 1173, Sfax 3038, Tunisia
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT,AND CONTROL. Manuscript received January 2, 2017; final manuscript received September 11, 2018; published online October 31, 2018. Assoc. Editor: Yang Shi.
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Hbiri, I., Karkri, H., Ghorbel, F. H., and Choura, S. (October 31, 2018). "Modeling and Parameter Identification of an In-Tank Swimming Robot Performing Floor Inspection." ASME. J. Dyn. Sys., Meas., Control. March 2019; 141(3): 031002. https://doi.org/10.1115/1.4041506
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