arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2407.01745eess.SYcs.AIcs.LGcs.SYmath.APmath.DS
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基于神经算子近似增益核的反应扩散PDE自适应控制

Adaptive control of reaction-diffusion PDEs via neural operator-approximated gain kernels

University of California San Diego(加州大学圣地亚哥分校)

Luke Bhan, Yuanyuan Shi, Miroslav Krstic

AI总结:

该研究将神经算子方法从双曲PDE自适应控制扩展到反应扩散PDE,通过近似增益核实现实时控制,证明了系统全局稳定性与渐近调节性,仿真显示计算速度提升达45倍。

摘要:

PDE反步法中增益核的神经算子近似已成为实时实现控制器的可行方法。该方法通过神经算子近似增益核,该核将系统系数映射到PDE的解。神经算子的优势在自适应控制中得以体现,因为每当系统系数的估计值更新时,都需要在线计算核PDE的解。我们将神经算子方法从双曲PDE的自适应控制扩展到基准抛物PDE(具有空间变化且未知反应系数的反应扩散方程)的自适应控制。我们证明了参数自适应Lyapunov设计下系统状态的全局稳定性和渐近调节性。该结果的关键技术挑战在于处理增益核的二维特性,并证明存在参数估计误差和神经近似误差这两种不同扰动项的目标系统是Lyapunov稳定的。为验证理论结果,我们进行了仿真,相对于传统有限差分解算器,仿真轨迹中每个时间步的计算速度提升高达45倍。

英文摘要:

Neural operator approximations of the gain kernels in PDE backstepping has emerged as a viable method for implementing controllers in real time. With such an approach, one approximates the gain kernel, which maps the plant coefficient into the solution of a PDE, with a neural operator. It is in adaptive control that the benefit of the neural operator is realized, as the kernel PDE solution needs to be computed online, for every updated estimate of the plant coefficient. We extend the neural operator methodology from adaptive control of a hyperbolic PDE to adaptive control of a benchmark parabolic PDE (a reaction-diffusion equation with a spatially-varying and unknown reaction coefficient). We prove global stability and asymptotic regulation of the plant state for a Lyapunov design of parameter adaptation. The key technical challenge of the result is handling the 2D nature of the gain kernels and proving that the target system with two distinct sources of perturbation terms, due to the parameter estimation error and due to the neural approximation error, is Lyapunov stable. To verify our theoretical result, we present simulations achieving calculation speedups up to 45x relative to the traditional finite difference solvers for every timestep in the simulation trajectory.

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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