摘要
研究了棘轮势作用下的布朗马达的一种反馈控制模型.温度开关根据布朗粒子的受力情况来确定环境温度的变化,从而控制马达的运动.通过数值模拟得到了马达定向运动的流.当温度比值参数β<1时,流总是负的;β>1时流的大小和方向都与棘轮势的不对称参数有关.研究结果表明,流的正负是马达热运动的能量与势垒能量竞争的结果.
A model of Brownian motor in period ratchet potential under a feedback control was studied,which changed the surrounding temperature according to the particle＇s force.By numerical simulations,the directed current was obtained.When β1（the ratio of switching temperature）,the current was always negative,but when β1,the current was correlated to the asymmetry of the potential in value and direction.The results showed that the direction of the current was the competition of thermal motion and the potential energy.
出处
《郑州大学学报（理学版）》
CAS
北大核心
2012年第4期73-77,共5页
Journal of Zhengzhou University:Natural Science Edition
基金
河南省科技厅基础与前沿技术研究计划资助项目
编号092300410142
关键词
反馈控制
布朗马达
棘轮势
feedback control
Brownian motor
ratchet potential
