Active cancellation of acoustical resonances with an FPGA FIR filter.

@article{Ryou2017ActiveCO,
  title={Active cancellation of acoustical resonances with an FPGA FIR filter.},
  author={A. Ryou and J. Simon},
  journal={The Review of scientific instruments},
  year={2017},
  volume={88 1},
  pages={
          013101
        }
}
  • A. Ryou, J. Simon
  • Published 2017
  • Medicine, Physics
  • The Review of scientific instruments
  • We present a novel approach to enhancing the bandwidth of a feedback-controlled mechanical system by digitally canceling acoustical resonances (poles) and anti-resonances (zeros) in the open-loop response via an FPGA FIR filter. By performing a real-time convolution of the feedback error signal with an inverse filter, we can suppress arbitrarily many poles and zeros below 100 kHz, each with a linewidth down to 10 Hz. We demonstrate the efficacy of this technique by canceling the ten largest… CONTINUE READING

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