首页> 外文期刊>IFAC PapersOnLine >A Feedback Control of Fluctuations in Simple Molecular Dynamics
【24h】

A Feedback Control of Fluctuations in Simple Molecular Dynamics

机译:简单分子动力学中涨落的反馈控制

获取原文
           

摘要

Suppression of diffusion processes generated by fluctuations in small-scale systems is crucial for its manipulation especially in nanotechnology. In this work, we focus on thermal fluctuations and their diffusion effect in a model of molecular dynamics. First, we propose time-delayed feedback control method instead of decreasing temperature which is a conventional way of controlling thermal fluctuations. We investigate numerically an effect of delayed-feedback on random walks in discrete time systems and find that diffusion processes of the controlled random walk is suppressed with increasing delay time. Second, we apply the proposed method to simple models of molecular dynamics which are composed of a single particle as well as two flocculated ones with the Lennard-Jones potential. Numerical simulations of the molecular dynamics show the effectiveness of the proposed method for suppressing diffusion processes observed in molecular dynamics.
机译:抑制由小规模系统的波动产生的扩散过程对其操纵至关重要,尤其是在纳米技术中。在这项工作中,我们关注分子动力学模型中的热涨落及其扩散效应。首先,我们提出了一种延时反馈控制方法,而不是降低温度,这是控制热波动的常规方法。我们在数值上研究了离散时间系统中延迟反馈对随机游动的影响,发现随着延迟时间的增加,受控随机游动的扩散过程受到抑制。其次,我们将提出的方法应用于分子动力学的简单模型,该模型由单个粒子以及两个具有Lennard-Jones势的絮凝粒子组成。分子动力学的数值模拟表明,所提出的方法可有效抑制分子动力学中观察到的扩散过程。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号