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论述了延时嵌入相空间重构方法及其伪相图的获取技术 ,将这一方法用于大机组非线性故障的定性特征提取。几个故障实例的分析结果表明 :伪相图在一定程度上与转子的轴心轨迹类似。由于伪相图可通过一维时间序列而得到 ,而且伪相图的构造过程包含了降噪过程。因此 ,将伪相图应用于大机组非线性故障的特征提取具有一定的优越性。
This paper discusses the method of phase space reconstruction based on delay embedding and the technique of obtaining its pseudo-phase diagram. This method is applied to the qualitative feature extraction of large-scale unit nonlinear fault. The analysis results of several fault cases show that the pseudo-phase diagram is similar to the axis of the rotor to some extent. Because the pseudo-phase diagram can be obtained by a one-dimensional time series, and the pseudo-phase diagram of the construction process includes a noise reduction process. Therefore, the application of pseudo-phase diagram to the feature extraction of large unit nonlinear fault has some advantages.