【摘要】 将调制技术与随机共振原理相结合,提出用频率调制随机共振的方法,实现在大参数情况下从强噪声中检测微弱周期信号,并对随机共振技术运用于强噪声背景下的弱信号检测进行研究。分析调频信号的频谱,发现其含有的低频信号通过双稳系统易产生随机共振,数值分析及仿真结果表明该方法能使微弱的故障信号特征突出、明显而易于捕捉。更多还原

【Abstract】 The method of modulated stochastic resonance is proposed to realize the weak periodic signal distinguished from the strong noise in case of big parameter.Combining the modulation technology with the stochastic resonance theory,the weak signal detection in the heavy noise background by using random resonance technology is studied.From the spectrum analysis of signal in frequency modulation,the results indicate the stochastic resonance is easily generated when the low frequency signal acts on the bistable system.The method makes the characteristics of weak fault signal to be obvious and easily to capture.更多还原