| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus, system and method for removing a repeated runout (RRO) component from an input signal by using a combination feedforward-feedback system that responds as fast as possible and correctly in an always-stable state. SOLUTION: An apparatus, system, and method for canceling a repeated runout signal are disclosed. A signal processing module receives a position error signal and outputs a position correction signal. A feedforward module receives the position error signal and outputs one or more cancel signals to cancel one or more repeated runout component from the position error signal when the position error signal is combined with the position correction signal. A combining module combines the position correction signal and the cancel signal with a position command signal. A feedback module receives the position command signal and outputs the position error signal. COPYRIGHT: (C)2008,JPO&INPIT
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