Volterra-Wiener-Korenberg模型非线性检验方法

The Volterra Wiener Korenberg Model Nonlinear Test Method

通过 Logistic系统产生的周期 2、周期 3及混沌的时间序列研究了噪声对 Volterra-Wiener- Korenberg模型非线性检验方法的影响 ,由 Lorenz混沌时间序列进一步探讨了采用该方法检验非线性时间序列的实用性 ,并利用该方法对疲劳表面肌电信号进行了非线性分析 .结果表明 ,测量噪声和内部噪声对该方法的影响有所不同 ,从而对于有噪声的短实验数据 ,该方法只是一种间接的非线性检验方法 ,并不能直接判定原始数据是否存在混沌特性 .

The three time series of period 2, period 3 and chaos generated by Logistic system were applied to study the noise impacts on the Volterra Wiener Korenberg (VWK) nonlinear test method. Lorenz chaotic time series were used to further discuss the practicability of this method. And the nonlinearity of surface EMG signal during fatigue was analyzed by using the method. The results indicate that there are the different effects of measuring noise and inner noise to this method. Thus, for the short experiment data with noise, this method is only an indirect nonlinear test method and can not directly determine whether the raw data have chaotic characteristic.