Patent ID: 11862193
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. A parameter setting method of a magnetic disk device used for the magnetic disk device comprising:
an actuator;
a controller that controls the actuator;
a loop shaping filter connected in parallel with the controller, the loop shaping filter having a parameter for suppressing a rotation asynchronous disturbance affecting the actuator, the parameter of the loop shaping filter being determined using a transfer function from an output of the loop shaping filter to before an input of the rotation asynchronous disturbance; and
a notch filter that suppresses mechanical resonance of the actuator,
the parameter setting method comprising:
changing a parameter of the notch filter according to a change in the actuator, and simultaneously redesigning the parameter of the loop shaping filter by reflecting a change in the transfer function.