Control System Health Analysis Method Based on Joint Noise Reduction and Empirical Mode Decomposition
A technology of empirical mode decomposition and collection of empirical modes, which is applied in general control systems, control/regulation systems, test/monitoring control systems, etc. unhealthy issues
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[0047] The present invention will be further explained below in conjunction with the accompanying drawings.
[0048] like figure 1 As shown, a control system health status analysis method based on joint noise reduction and Empirical Mode Decomposition (EMD), by introducing a joint noise reduction method combining median filtering and improved wavelet threshold using inter-scale correlation, and using endpoint The method of combining continuation, ensemble empirical mode decomposition (EEMD) and correlation coefficient threshold comparison method extracts the state characteristics of the control system through four steps of median filtering, wavelet threshold noise reduction, empirical mode decomposition, and energy entropy calculation. Compared with the initial detected normal state entropy value, real-time judgment of the operating state of the control system includes the following specific steps:
[0049] Step 1) Perform median filtering on the discrete noisy signal f(k) to...
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