制御周期のナイキスト周波数を超える共振周波数を有するDDテーブル駆動系の振動モードの特定による連続軌跡制御の高精度化

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  • Precision Improvement in the Continuous Path Control of Direct Drive Rotary Table Systems for Machine Tools by Identifying the Vibration Modes with Higher Resonance Frequencies than the Control Cycle's Defined Nyquist Frequency

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説明

Direct drive (DD) motors realize precise position control but are easily affected by torque ripple vibrations. Higher gain leads to suppression of the vibrations but it brings excitations of other mechanical resonances at higher frequencies than the Nyquist frequency. We propose a new measurement method of exact frequency response to the Nyquist and beyond to identify such mechanical resonances. The performance has been evaluated in an actual machine tool with a DD motor. The precision of continuous path control is improved with higher gain assisted by the proposed method.

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  • 精密工学会誌

    精密工学会誌 83 (11), 1033-1040, 2017

    公益社団法人 精密工学会

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