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arXiv 2602.07196math.OC
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分布式优化的对偶算法:基于耗散性的视角

Primal-dual algorithm for distributed optimization: A dissipativity-based perspective

University of Notre Dame(圣母大学)

Weijian Li, Panos J. Antsaklis, Hai Lin

AI总结:

本文提出了一种基于耗散性的连续时间对偶算法,用于在非平衡有向图上解决非凸分布式优化问题,并通过选择增益或设计网络拓扑实现指数收敛。

摘要:

我们研究了一种连续时间的对偶算法,用于在非平衡有向图上处理非凸局部成本函数的分布式优化问题,并从耗散性的角度分析其性能。我们首先将该算法重新表述为一种Lure类型系统,该系统由一个依赖于通信拓扑和算法增益的线性子系统,以及一个静态非线性梯度反馈组成。然后我们证明线性子系统相对于适当的供应率是耗散的,而非线性反馈则不是被动的。最后我们建立,通过适当选择增益或合理设计通信网络,该算法以指数速率收敛到平衡点,从而实现分布式问题的最优解。这项工作为网络拓扑、算法增益和成本函数在分布式算法性能中的作用提供了新的见解,并从不同视角补充了现有结果。

英文摘要:

We study a continuous-time primal-dual algorithm for distributed optimization with nonconvex local cost functions over weight-unbalanced digraphs, and analyze its performance from a dissipativity-based perspective. We first reformulate the algorithm as a Lure type system, consisting of a linear subsystem that relies on the communication topology and the algorithm gains, and a static nonlinear gradient feedback. We then show that the linear subsystem is dissipative with respect to a suitable supply rate, while the nonlinear feedback is not passive. Finally, we establish that, by properly selecting the gains or appropriately designing the communication network, this algorithm converges to an equilibrium at an exponential rate, and thus, achieves an optimal solution to the distributed problem. This work provides new insights into the roles of the network topology, algorithm gains, and cost functions in the performance of a distributed algorithm, and complements existing results from a different viewpoint.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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