arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.07856math.DSmath-phmath.MPnlin.CDphysics.comp-ph
收藏

非自治非线性动力系统的最优时间平均

Optimal time averages in non-autonomous nonlinear dynamical systems

Charles R. Doering, Andrew McMillan

摘要:

辅助函数法允许通过凸优化计算自治非线性常微分方程中动态变量函数的极值长时间平均值。对于由自治多项式向量场定义的动力系统,利用平方和技术将其可操作地实现为半定规划。在这方面的贡献,我们回顾的方法,并将其应用到周期性驱动的非自治的非线性向量场,涉及三角函数的动态变量。以阻尼驱动的Duffing振子和周期驱动的单摆为例说明了辅助函数法的实用性。

英文摘要:

The auxiliary function method allows computation of extremal long-time averages of functions of dynamical variables in autonomous nonlinear ordinary differential equations via convex optimization. For dynamical systems defined by autonomous polynomial vector fields, it is operationally realized as a semidefinite program utilizing sum of squares technology. In this contribution we review the method and extend it for application to periodically driven non-autonomous nonlinear vector fields involving trigonometric functions of the dynamical variables. The damped driven Duffing oscillator and periodically driven pendulum are presented as examples to illustrate the auxiliary function method's utility.

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。

↑