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• W3120984827 abstract "Planning collision-free paths for multi-robot systems (MRS) is a challenging problem because of the safety and efficiency constraints required for real-world solutions. Even though coupled path planning approaches provide optimal collision-free paths for each agent of the MRS, they search the composite space of all the agents and therefore, suffer from exponential increase in computation with the number of robots. On the other hand, prioritized approaches provide a practical solution to applications with large number of robots, especially when path computation time and collision avoidance take precedence over guaranteed globally optimal solution. While most centrally-planned algorithms use static prioritization, a dynamic prioritization algorithm, PD*, is proposed that employs a novel metric, called freedom index, to decide the priority order of the robots at each time step. This allows the PD* algorithm to simultaneously plan the next step for all robots while ensuring collision-free operation in obstacle ridden environments. Extensive simulations were performed to test and compare the performance of the proposed PD* scheme with other state-of-the-art algorithms. It was found that PD* improves upon the computational time by 25% while providing solutions of similar path lengths. Increase in efficiency was particularly prominent in scenarios with large number of robots and/or higher obstacle densities, where the probability of collisions is higher, suggesting the suitability of PD* in solving such problems." @default.
• W3120984827 created "2021-01-18" @default.
• W3120984827 creator A5017515156 @default.
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• W3120984827 creator A5055805805 @default.
• W3120984827 date "2021-01-06" @default.
• W3120984827 modified "2023-09-27" @default.
• W3120984827 title "Dynamic Prioritization for Conflict-Free Path Planning of Multi-Robot Systems." @default.
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• W3120984827 hasPublicationYear "2021" @default.
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