During the study of using the nonlinear stochastic resonance system to detect the periodic pulse signal, usually the bistable nonlinear system is used. Bistable system has two structural parameters which need to be adjusted continuously, and lager error in the detection result limited the detection performance of the system. In order to optimize the system and improve its detection performance, combined the fact that periodic pulse signal will be converted to cycle triangle wave signal after an integral, which can greatly improve the signal amplitude, a single stable system is put forward, which has only one structural parameter and integral function. Through the analyses of signal spectrum and the contrasting of signal amplitudes, it is confirmed that the single state system with smaller structure parameter values has integral effect. The simulations based on Matlab and Monte - Carlo indicate that the single stable nonlinear system with integral function can get better detection performance.%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均为变量,需要不断调节,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,结合周期脉冲信号经过一次积分后变为周期三角波信号,能够大幅度提高信号幅值的特性,提出了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.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.
展开▼
