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Feedforward compensation for multi-actuator hard drives

  • US 9,911,442 B1
  • Filed: 11/23/2016
  • Issued: 03/06/2018
  • Est. Priority Date: 11/23/2016
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a first controller configured to generate a first voice coil motor (VCM) control signal in response to a first position error signal;

    a second controller configured to generate a second VCM control signal in response to a second position error signal; and

    a coupling compensator configured to generate a first feedforward correction signal in response to the first VCM control signal and in response to precomputed future values of a feedforward seek signal, wherein the first feedforward correction signal modifies the second VCM control signal to generate a modified second VCM control signal.

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