小流量涡街信号的随机共振特性与频率检测方法
发布时间：2018-09-14 10:05
【摘要】：分析了小流量涡街信号特性,探讨了信号与随机共振系统的阈值和克莱默斯逃逸率之间的关系,提出一种基于幅值和频率双重调制的随机共振方法,用于检测小流量涡街信号的频率。该方法以外加控制信号的幅值和频率作为调控变量,采用多参数控制方式使小流量涡街信号产生随机共振。经数值仿真及实验研究,表明该方法能将小流量涡街信号通过随机共振得到增强,有效获取涡街频率,实现小流量测量,为随机共振的控制和微弱信号的检测提供一种新方法。
[Abstract]:The characteristics of vortex street signal with small flow rate are analyzed. The relationship between the signal and the threshold of stochastic resonance system and the escape rate of Kramer is discussed. A stochastic resonance method based on amplitude and frequency modulation is proposed. Used to detect the frequency of small flow vortex signals. In this method, the amplitude and frequency of the external control signal are taken as the control variables, and the multi-parameter control method is used to make the vortex street signal with small flux generate stochastic resonance. Through numerical simulation and experimental study, it is shown that this method can enhance the signal of vortex street with small flux through stochastic resonance, obtain vortex frequency effectively, and realize the measurement of small flow rate. It provides a new method for the control of stochastic resonance and the detection of weak signal.
【作者单位】： 中国计量学院计量测试工程学院;
【基金】：浙江省自然科学基金资助项目(LY13E050012,LY13A020004)
【分类号】：TH814
本文编号：2242399
[Abstract]:The characteristics of vortex street signal with small flow rate are analyzed. The relationship between the signal and the threshold of stochastic resonance system and the escape rate of Kramer is discussed. A stochastic resonance method based on amplitude and frequency modulation is proposed. Used to detect the frequency of small flow vortex signals. In this method, the amplitude and frequency of the external control signal are taken as the control variables, and the multi-parameter control method is used to make the vortex street signal with small flux generate stochastic resonance. Through numerical simulation and experimental study, it is shown that this method can enhance the signal of vortex street with small flux through stochastic resonance, obtain vortex frequency effectively, and realize the measurement of small flow rate. It provides a new method for the control of stochastic resonance and the detection of weak signal.
【作者单位】： 中国计量学院计量测试工程学院;
【基金】：浙江省自然科学基金资助项目(LY13E050012,LY13A020004)
【分类号】：TH814
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