| 摘要 |
PURPOSE:To extend the frequency region over a frequency at which periodic fluctuation components can be suppressed by a method wherein a current estimated value corresponding to a rotational position is added, by means of an accumulating/adding means, to an error fed from a feedback control system and the sum is stored, as a new estimated value, in a memory means. CONSTITUTION:The periodic component compensation control system comprises a memory means for storing an estimated value of periodic fluctuation component estimated based on an error signal and applied on a feedback control system while corresponding with the rotational position of a rotary body, an accumulating/adding means for adding the error signal to an estimated value read out from the memory means and corresponding to the rotational position and feeding the sum, as a new estimated value, to the memory means, an address control means for storing the new estimated value, to be fed from the accumulating/adding means in response to the rotational position of the rotary body and based on an output signal from a pulse generating means, in the memory and sequentially outputting the estimated values corresponding to the rotational position of the rotary body from the memory means, and a phase correcting means for correcting the amplitude and the phase of a series of estimated values read out sequentially from the memory means according to the cyclic transmission characteristics of the feedback control system. Motor is then subjected to drive control based on the sum of the error signal and the output signal from the phase correcting means. |
