タスク間の優先関係を考慮したオンライン複数ロボットの協調と連携
Online Multi-Robot Coordination and Cooperation with Task Precedence Relationships
タスク間の複雑な優先関係、タスク内調整、ロボット連合による協力を組み込んだマルチロボットタスク割り当て問題を定式化し、ネットワークフローに基づくオンライン反復再割り当てアルゴリズムを提案した。
詳しい要約
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著者: Walker Gosrich, Saurav Agarwal, Kashish Garg, Siddharth Mayya, Matthew Malencia, Mark Yim, Vijay Kumar
分類: cs.RO
原文アブストラクト
We propose a new formulation for the multi-robot task allocation problem that incorporates (a) complex precedence relationships between tasks, (b) efficient intra-task coordination, and (c) cooperation through the formation of robot coalitions. A task graph specifies the tasks and their relationships, and a set of reward functions models the effects of coalition size and preceding task performance. Maximizing task rewards is NP-hard; hence, we propose network flow-based algorithms to approximate solutions efficiently. A novel online algorithm performs iterative re-allocation, providing robustness to task failures and model inaccuracies to achieve higher performance than offline approaches. We comprehensively evaluate the algorithms in a testbed with random missions and reward functions and compare them to a mixed-integer solver and a greedy heuristic. Additionally, we validate the overall approach in an advanced simulator, modeling reward functions based on realistic physical phenomena and executing the tasks with realistic robot dynamics. Results establish efficacy in modeling complex missions and efficiency in generating high-fidelity task plans while leveraging task relationships.
