摘要
双稳态随机共振系统模型在微弱信号检测方面具有很好的应用特性,为微弱信号的检测提供了新的思路。如何用更简单的方法突破近似绝热条件的限制,使其应用于高频信号检测,是近些年来的研究热点。分析势函数的形状特征对系统输出信噪比影响的基础上,研究了系统从双稳状态(A<Ac)到失稳(A≥Ac),再到单稳状态(a=0或b=0)过程中,系统输出特性的变化规律。提出了一种基于势函数的参数调节方法,通过对系统参数加以控制,可以在不影响系统最佳输出信噪比的情况下,将可调参量降为1个,减少参数调节的工作量。经过仿真和实验采集数据验证,该方法简单易行,具有一定的应用价值。
The model of bistable stochastic resonance system has a very good application property in weak signal detection,provides a new way of thinking to detect weak signals. It is a hot topic in recent years that looking for a more simple way to break through adiabatic approximation condition,so that it applies a high frequency signal detection. The Variation of the output characteristics of the system from bistable state（ A Ac） was studied to instability（ A ≥ Ac） and then single stable state（ a = 0 or b = 0）,depending on the affect of the shape characteristics of the potential function. One kind of parameter adjustment method based on potential function was presened,by controlling the system parameters reduces adjustable parameter to one,without changing the system＇s optimum output SNR,will reduce the workload of parameter adjustment. The simulation and experimental data collection prove that the method is simple,and has a certain value.
出处
《科学技术与工程》
北大核心
2016年第16期49-52,63,共5页
Science Technology and Engineering
基金
河北省研究生创新资助项目(Z99910)
国家自然科学基金(51375319)
河北省杰出青年科学基金(E2013210113)
河北省百名优秀创新人才支持计划(BR2-222)课题资助
关键词
随机共振
势函数
参数调节
stochastic resonance
potential function
parameter adjustment
