1 results about "Compressor stall" patented technology

The application discloses a compressor stall failure acoustic identification method and system, and relates to the field of engine state monitoring and fault diagnosis. The method comprises the following steps: collecting acoustic signals in the operation process of the compressor; performing frame division and windowing processing on the acoustic signals; performing spectrum analysis and frequency band division on each frame of windowed signals to generate a frame energy vector; evaluating the importance of each frequency band based on the random forest out-of-bag replacement method to screen out key frequency bands; constructing a triangular filter bank with each frequency in the key frequency set as a vertex, and performing neighborhood expansion when the interval between adjacent frequencies exceeds a threshold interval to obtain a reconstructed adaptive filter bank and a final filter energy feature vector; and inputting the final filter energy feature vector into a deep neural network model to obtain an identification result of whether the compressor is in a stall state. The application has the advantages of reducing equipment cost, simplifying installation process, improving stall feature targeted analysis capability, and enhancing the robustness of the identification result.