级联双稳随机共振系统非线性滤波特性

Stochastic resonance non-linear filter characteristic of cascaded bistable systems

在级联双稳随机共振理论研究的基础上,探讨了信号通过级联双稳系统后,在能量逐渐由高频向低频转移的同时,还具有非线性的低通滤波特性。对于具有不同幅值分布的各频率分量,仿真实验表明,低频幅值如果相对高频幅值较大,通过较少级数的级联双稳系统可达到较好的低通滤波效果,而对于高频幅值比低频幅值大的情况,通过较多级数的级联双稳系统也可达到满意的低通滤波效果。最后,通过一个金属切削实验说明了其工程实用性。

On the basis of stochastic resonance of cascaded bistable systems, a non-linear lowpass filter characteristic can be revealed due to the energy transfer mechanism from high frequency area to low frequency area. According to the different energy distributions of signals frequency, it has been demonstrated by two simulated experiments that an effective lowpass filter can be achieved by choosing an optimal order. A metal cutting application proves its engineering practicability.