光ディスク装置における平均化手法を用いた繰り返し制御(機械力学,計測,自動制御)

概要

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We have developed a new kind of repetitive control to reduce position error caused by both synchronous and asynchronous disturbances to disc rotation in optical disc drives. Conventional repetitive control greatly decreases position error synchronized with the disc rotation, but increases asynchronous position error. To decrease the asynchronous position error, a new method that averages control input signal every disc rotation has been incorporated into the conventional method. Experimental tests show that, at 9200-rpm disc rotation, the new control method significantly decreases the synchronous position error but does not increase the asynchronous position error. In other words, the new method achieves total position error 48% less than that of the conventional method (i.e., without using repetitive control).
社団法人日本機械学会の論文
2002-05-25