期刊
IEEE ROBOTICS AND AUTOMATION LETTERS
卷 3, 期 3, 页码 2577-2583出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LRA.2018.2803811
关键词
Aerial systems: mechanics and control; mobile manipulation; multi-robot systems; distributed robot systems
类别
资金
- European Union [644271 AEROARMS]
This letter considers the cooperative manipulation of a cable-suspended load with two generic aerial robots without the need of explicit communication. The role of the internal force for the asymptotic stability of the beam position-and-attitude equilibria is analyzed in depth. Using a nonlinear Lyapunov-based approach, we prove that if a nonzero internal force is chosen, then the asymptotic stabilization of any desired beam attitude can be achieved with a decentralized and communicationless master-slave admittance controller. If, conversely, a zero internal force is chosen, as done in the majority of the state-of-the-art algorithms, the attitude of the beam is not controllable without communication. Furthermore, we formally proof the output-strictly passivity of the system with respect to an energy-like storage function and a certain input-output pair. This proves the stability and the robustness of the method during motion and in nonideal conditions. The theoretical findings are validated through extensive simulations.
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