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New coordination scheme for multi-robot systems based on state space models

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3 Author(s)
Wenlong, Xie ; Dept. of Automation, Shanghai Jiaotong Univ., Shanghai 200240, P. R. China ; Jianbo, Su ; Zongli, Lin

A new coordination scheme for multi-robot systems is proposed. A state space model of the multi-robot system is defined and constructed in which the system's initial and goal states are included along with the task definition and the system's internal and external constraints. Task accomplishment is considered a transition of the system state in its state space (SS) under the system's constraints. Therefore, if there exists a connectable path within reachable area of the SS from the initial state to the goal state, the task is realizable. The optimal strategy for the task realization under constraints is investigated and reached by searching for the optimal state transition trajectory of the robot system in the SS. Moreover, if there is no connectable path, which means the task cannot be performed successfully, the task could be transformed to be realizable by making the initial state and the goal state connectable and finding a path connecting them in the system's SS. This might be done via adjusting the system's configuration and/or task constraints. Experiments of multi-robot formation control with obstacles in the environment are conducted and simulation results show the validity of the proposed method.

Published in:

Systems Engineering and Electronics, Journal of  (Volume:19 ,  Issue: 4 )

Date of Publication:

Aug. 2008

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