Patent ID: 9202496
Filing Date: 2015-12-01
Classification: G11B

Abstract:
1. A method comprising: applying a voice coil motor (VCM) input signal to a voice coil motor and a microactuator (PZT) input signal to a microactuator in response to positioning a read/write head of a hard drive; determining a position signal in response to positioning the read/write head; decoupling a PZT component from the position signal to determine an estimated VCM response, the estimated VCM response used to determine an estimated VCM disturbance; decoupling a VCM component from the position signal to determine an estimated PZT response, the estimated PZT response used to determine an estimated PZT disturbance; and modifying the VCM input signal and the PZT input signal respectively to compensate for the estimated VCM disturbance and the estimated PZT disturbance.