摘要
以势阱函数为研究对象,提出了势函数参数的概念,阐述了不同势函数参数下系统随机共振机理,并讨论了过阻尼系统和Duffing振子系统在不同势函数参数下的随机共振性能对比.实验表明,在满足一定参数条件下,提升系统势函数参数将会提升系统输出的最大幅值增益以及最大输出信噪比,与传统一元四次势函数下的随机共振系统相比,性能提升得非常明显;Duffing振子系统相比于过阻尼系统,其调节范围更宽.联合调节阻尼比与势函数参数可以使信号达到更佳的随机共振状态,为信号的后续处理奠定基础.
Based on the study of potential well function, the potential function parameter is put foward in this paper. The mechanism of stochastic resonance system and the comparison of overdampcd system with Duffing oscillator system under various potential function parameters are discussed. Experiment shows that, under certain parameter condition, the maximum amplitude gain and the output signal-to-noise ratio will increase with the increase of system potential function parameter value. Compared with the traditional stochastic resonance system using quartic potential function of one variable, the improvement becomes more obvious. In addition, compared with the overdamped system, Duffing oscillator shows a larger range of adjustment. Combining the adjustment of damping parameter with the potential function parameter, Duffing oscillator will lead to an appropriate stochastic resonance state, laying good foundation for the subsequent signal processing.
出处
《纳米技术与精密工程》
CAS
CSCD
北大核心
2017年第2期114-120,共7页
Nanotechnology and Precision Engineering
基金
天津市自然科学基金资助项目(13JCYBJC18000)
关键词
势函数参数
随机共振
阻尼比
potential function parameter
stochastic resonance
damping ratio
作者简介
李一博（1973-），男，博士，副教授．
通讯作者：王会芳，硕士，wanghuifang103@126．com．
