Optimality Deviation using the Koopman Operator
Optimization and Control
2026-03-31 v2 Systems and Control
Systems and Control
Abstract
This paper investigates the impact of approximation error in data-driven optimal control problem of nonlinear systems while using the Koopman operator. While the Koopman operator enables a simplified representation of nonlinear dynamics through a lifted state space, the presence of approximation error inevitably leads to deviations in the computed optimal controller and the resulting value function. We derive explicit upper bounds for these optimality deviations, which characterize the worst-case effect of approximation error. Supported by numerical examples, these theoretical findings provide a quantitative foundation for improving the robustness of data-driven optimal controller design.
Cite
@article{arxiv.2512.10270,
title = {Optimality Deviation using the Koopman Operator},
author = {Yicheng Lin and Bingxian Wu and Nan Bai and Yunxiao Ren and Zhisheng Duan},
journal= {arXiv preprint arXiv:2512.10270},
year = {2026}
}