| 摘要 |
A feedback control system applicable to a magnetic disk unit is capable of improving the accuracy of positioning at a low sampling frequency. The feedback control system comprises a feedback control unit (13) that samples a differential signal representing a difference between a desired value (11) and an output provided by a controlled device (17) at a sampling frequency and produces a control command value every time the differential signal is sampled, a multigain means (14) that divides one sampling period into a combination of a plurality of time periods (T1 to TN) according to a predetermined time period dividing rule and allots gains to the plurality of time periods, respectively, according to a predetermined gain allotting rule, a multihold means (15) that holds the products of the control command value and the gains allotted by the multigain allotting means as fixed values for the time periods and generates a control waveform, and a driving means (16) that applies the control waveform generated by the multihold means to the controlled device.
|
