ナイキスト周波数を超えた機構系残留振動の抑制方法

DOI Web Site 被引用文献2件 参考文献3件 オープンアクセス

書誌事項

タイトル別名
  • Suppression of Residual Vibration of Mechanical Resonance beyond the Nyquist Frequency
公開日
2012
DOI
  • 10.1299/kikaic.78.1362
公開者
一般社団法人 日本機械学会

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説明

In sampled-data positioning control systems, the vibrations caused by the mechanical resonances around a sampling frequency are not only the difficult to observe but readily excited by the control input in transient-state characteristics. To address this problem, we developed a control method that can suppress the zero-order-hold induced residual vibration in the sampled-data positioning control system. The study is on a shock response spectrum (SRS) analysis that handles the transient-state characteristics of mechanical resonances. The control method uses multi-rate notch filters that modify the acceleration input signals beyond the Nyquist frequency. We designed the notch filter based on the SRS analysis because the frequency response on the Bode diagram was not suitable for analyzing transient characteristics. The results of SRS analyses showed that the multi-rate notch filter was able to decrease the amplitude of residual vibrations caused by the mechanical resonances around the sampling frequency. To demonstrate the validity of the proposed method, simulations were conducted on a sampled-data positioning control system.

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