| 摘要 |
<p>The comb type filter includes a sequential first switch(79). The switch switches many speed error data, generated for every rotation of a drum, as per number of polarization of the drum(1). Many low pass filters(73-78) are provided to which speed error data is applied through the first switch(79). The second switch(80) sequentially transmits the output of the low pass filters(73-78). A subtraction device(72) subtracts an output data of each of the low pass filters(73-78) from the speed error data. A mean value detector(81) averages the mean value of the speed error data of the low pass filter outputs. An adder(82) adds the data of both the mean value detector(81) and the subtraction device(72). The comb filter improves performance of servo system.</p> |
