Frequency Domain Method for Real-Time Detection of Oscillations

  title={Frequency Domain Method for Real-Time Detection of Oscillations},
  author={Girish Chowdhary and Sriram Srinivasan and Eric N. Johnson},
Because of the growing interest in real-time stability monitoring, there is a need for online methods that can detect off-nominal behavior in control systems. Therefore, we present a real-time frequency domain method for detecting oscillations in control systems. The method uses recursive Fourier transform for representing the measured time domain signal in frequency domain. Oscillations are then detected by monitoring the norm of the Fourier coefficients over a time window of pre-specified… CONTINUE READING
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