改进检测周期脉冲信号的非线性随机共振系统

摘要

在利用非线性随机共振系统检测周期脉冲信号的研究中,通常采用的非线性系统为双稳态系统。针对双稳态系统的两个结构参数不易调节,误差较大,限制了系统检测性能的提高。为了优化系统,提高系统检测性能,提出采用只有一个结构参数且具有积分放大作用的单稳态系统。通过分析信号频谱,对比信号幅值,证实结构参数取较小值的单稳态系统具有积分作用,易于调节。Matlab、Monte-Carlo仿真验证具有积分特性的单稳态系统可获得更佳的检测效果。%During the study of using the nonlinear stochastic resonance system to detect the periodic pulse signal,the bistable nonlinear system is usually used.Bistable system has two structural parameters which are not easy to be adjusted,which result in big error and limit to improve the system detection performance.In order to optimize the system,improve the system detection performance and pose to use the single system which has a structural parameters and integral function.Through analysing signal spectrum,contrasting signal amplitude,the result confirmed that the single system has integral effect which structure parameters took smaller value.Matlab and Monte-Carlo simulation indicates that the single stable nonlinear system can get better detection performance which has integral function.