| 摘要 |
For head positioning in a disk drive, a waveform generator (312) generates an acceleration orbit, a velocity orbit, and a position orbit from the seek time. Each of these three orbits is multiplied by respective gains (K a , K v , K p ), whereupon the orbits are synthesized by a first adder (316). The resulting composite orbit is multiplied (317) by a seek distance and then passed through a FIR filter (318) to obtain the target position orbit that is to be applied to the later-stage two-degree-of-freedom control system. The two-degree-of-freedom control system has a characteristic whereby it is able to approximate a second-order low-pass filter.
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