论文部分内容阅读
研究了当系统的阻尼率、固有频率和激励信号受色电报作用时,二阶过阻尼线性系统中的随机共振现象。通过线性系统理论和相关删去法,得到了系统平均输出幅度增益的精确表达式。系统平均输出幅度增益是电报噪声的强度、相关率、系统的阻尼率、固有频率以及激励信号的频率的非单调函数;适当的噪声参数和系统参数可以使有噪声情况下的输出幅度增益大于无噪声时的输出幅度增益;通过改变噪声参数和系统参数可以提高系统的输出幅值增益。此方法适用于电报噪声环境中线性系统的微弱信号检测。
The phenomenon of stochastic resonance in the second-order over-damped linear system is studied when the system’s damping ratio, natural frequency and excitation signal are affected by color telegrams. Through the linear system theory and the related deletion method, the exact expression of the average output amplitude gain of the system is obtained. The system average output amplitude gain is a non-monotonic function of telegraph noise intensity, correlation rate, system damping rate, natural frequency, and excitation signal frequency; appropriate noise parameters and system parameters can make the output amplitude gain greater than Output amplitude gain at noise level; system output amplitude gain can be increased by changing noise parameters and system parameters. This method is suitable for weak signal detection of linear system in telegraph noise environment.