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 feed forward compensation and and-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.