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An algorithm for cooperative task allocation in scalable, constrained multiple robot systems

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Abstract

The current trends in the robotics field have led to the development of large-scale multiple robot systems, and they are deployed for complex missions. The robots in the system can communicate and interact with each other for resource sharing and task processing. Many of such systems fail despite the availability of necessary resources. The major reason for this is their poor coordination mechanism. Task planning, which involves task decomposition and task allocation, is paramount in the design of coordination and cooperation strategies of multiple robot systems. Task allocation mechanism allocates the task in a mission to the robots by maximizing the overall expected performance, and thereby reducing the total allocation cost for the team. In this paper, we formulate a heuristic search-based task allocation algorithm for the task processing in heterogeneous multiple robot system, by maximizing the efficiency in terms of both communication and processing cost. We assume a set of decomposed tasks of a mission, which needs to be allocated to the robots. The near-optimal allocation schemes are found using the proposed peer structure algorithm for the given problem, where the number of the tasks is more than the robots present in the system. The cost function is the summation of static overhead cost of robots, assignment cost, and the communication cost between the dependent tasks, if they are assigned to different robots. Experiments are performed to verify the effectiveness of the algorithm by comparing it with the existing methods in terms of computational time and quality of solution. The experimental results show that the proposed algorithm performs the best under different problem scales. This proves that the algorithm can be scaled for larger system and it can work for dynamic multiple robot system.

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Authors and Affiliations

  1. Robotics Laboratory, Department of Engineering Design, Indian Institute of Technology Madras, Chennai , 600036, India

    Thareswari Nagarajan & Asokan Thondiyath

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  1. Thareswari Nagarajan
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  2. Asokan Thondiyath
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Correspondence to Thareswari Nagarajan.

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Nagarajan, T., Thondiyath, A. An algorithm for cooperative task allocation in scalable, constrained multiple robot systems. Intel Serv Robotics 7, 221–233 (2014). https://doi.org/10.1007/s11370-014-0154-x

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  • DOI: https://doi.org/10.1007/s11370-014-0154-x

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