Abstract
New 2-axis positional error detection algorithm for probe-based data storage is proposed. This algorithm can detect two-axis positions simultaneously and continuously for off-track control and synchronization purposes by vibrating the scanner in low frequency of the specific value. Then two decomposition signals are multiplied to the probe readback signal to extract two position error signals from it. Since this algorithm provides very precise positional errors continuously, off-track error and synchronization error can be controlled to zero continuously and the sensitivities to disturbances can be reduced.
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