Comprehensive Robust Dynamic Mode Decomposition from Mode Extraction to Dimensional Reduction
- URL: http://arxiv.org/abs/2601.11116v1
- Date: Fri, 16 Jan 2026 09:21:56 GMT
- Title: Comprehensive Robust Dynamic Mode Decomposition from Mode Extraction to Dimensional Reduction
- Authors: Yuki Nakamura, Shingo Takemoto, Shunsuke Ono,
- Abstract summary: Comprehensive Dynamic Robust Mode Decomposition (CR-DMD) is a framework that robustifies the entire process.<n>CR-DMD consistently outperforms state-of-art robust DMD methods in terms of mode accuracy and fidelity of low-dimensional representations under noisy conditions.
- Score: 16.886493310057194
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We propose Comprehensive Robust Dynamic Mode Decomposition (CR-DMD), a novel framework that robustifies the entire DMD process - from mode extraction to dimensional reduction - against mixed noise. Although standard DMD widely used for uncovering spatio-temporal patterns and constructing low-dimensional models of dynamical systems, it suffers from significant performance degradation under noise due to its reliance on least-squares estimation for computing the linear time evolution operator. Existing robust variants typically modify the least-squares formulation, but they remain unstable and fail to ensure faithful low-dimensional representations. First, we introduce a convex optimization-based preprocessing method designed to effectively remove mixed noise, achieving accurate and stable mode extraction. Second, we propose a new convex formulation for dimensional reduction that explicitly links the robustly extracted modes to the original noisy observations, constructing a faithful representation of the original data via a sparse weighted sum of the modes. Both stages are efficiently solved by a preconditioned primal-dual splitting method. Experiments on fluid dynamics datasets demonstrate that CR-DMD consistently outperforms state-of-the-art robust DMD methods in terms of mode accuracy and fidelity of low-dimensional representations under noisy conditions.
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