A method of minimizing a mechanical mode excitation is disclosed. A seed
position trajectory is generated utilizing a third order time polynomial,
wherein the third order time polynomial is segmented for constant
velocity, and deceleration. A reference position is generated by applying
a first infinite impulse response filter to the seed position trajectory.
A reference acceleration is then generated by applying a second infinite
impulse response filter to the reference position. Then, the reference
position and the reference acceleration are fed forward to a servo loop
such that an actuator follows a desired seek trajectory, thereby reducing
a position error signal at the seek settling.