Improving the disturbance resistance of magnetic disk drives by using anti-windup and model following controls with initial value compensation

Abstract

We have developed a magnetic head positioning control method of a hard disk drive under conditions of variable parameters and disturbances. It consists of model following control for feedforward compensation and anti-windup control for feedback compensation. By using anti-windup control for a feedback controller, slow and large transient responses near the target position are avoided and the actuator settles more quickly on the target position.