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针对双稳系统随机共振过程和反演过程中波形失真的原因,建立反演系统与双稳系统的耦合系统,将双稳系统和反演系统相耦合构成一个双稳复原系统,直接对含噪周期信号进行复原处理;同时运用自适应寻优方法,针对系统各参数对随机共振过程的影响度实施自适应寻优;通过对含噪周期信号进行采样和对噪声方差、信号频率的估算,以最大信噪比作为优化目标确定最佳的系统参数.仿真结果表明该方法具有快速性和准确性,信号复原效果好.
Aiming at the reason of waveform distortion during the process of stochastic resonance and the inversion of bistable system, a coupling system between the inversion system and the bistable system is established. The bistable system and the inversion system are coupled to form a bistable restoration system, Periodic signal is reconstructed. At the same time, adaptive optimization is used to optimize the influence of system parameters on the stochastic resonance process. By sampling the noisy periodic signal and estimating the noise variance and signal frequency, The maximum signal-to-noise ratio is used as the optimization objective to determine the optimal system parameters.The simulation results show that the proposed method is fast and accurate and the signal recovery is good.