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以双向环形耦合Duffing振子系统为对象,研究脉冲信号激励下耦合振子间动力学行为变化特征时,发现其与单向环形耦合Duffing振子系统类似,在一定的参数条件下,脉冲信号能引起其中一个振子与其他振子运动轨迹间出现短暂失同步的现象即瞬态同步突变现象.基于这种现象,提出了一种微弱脉冲信号检测的新方法,用于检测强噪声背景中的局部放电脉冲信号.实验测试表明,利用本文方法对不同放电电极的局部放电脉冲信号进行检测时,在低信噪比条件下可取得良好的检测效果,进而扩展了现有的Duffing振子对非周期信号的检测范围及应用领域.
In the case of the two-way circularly coupled Duffing oscillator system, we study the dynamic behavior of the coupling oscillator under the excitation of a pulsed signal. It is found that the system is similar to the unidirectional circularly coupled Duffing oscillator system. Under certain parameters, the pulse signal can cause one of them Based on this phenomenon, a new method of weak pulse signal detection is proposed, which is used to detect the partial discharge pulse signal in a strong noise background. The experimental results show that this method can detect the PD signals of different discharge electrodes well and can obtain good detection results under low signal-to-noise ratio. The detection range of the existing Duffing oscillator on aperiodic signals and Application areas.