抄録
In sampled-data positioning control systems, the positioning control system must avoid exciting mechanical resonances around the sampling frequency. To solve this problem, we have developed the control method that can suppress the residual vibrations above the Nyquist frequency in the sampled-data control system. The mechanical vibrations in the sampled-data control system are affected by the sampler and hold. As a result, we cannot estimate the amplitude of the vibration in steady-state characteristics. Therefore, this study has been based on 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. The results of SRS analysis show that the multi-rate notch filter can decrease the amplitude of residual vibrations caused by the mechanical resonances around the sampling frequency.
