Method for controlling digital closed servo loop system and disk storage apparatus using the system

摘要

A controlled variable is detected at each predetermined timing by a detecting section 2, and the controlled variable is compared with a target value by a comparator 3 to obtain a deviation. A manipulated variable is calculated, based on the deviation, by a compensating section 4, and a height H corresponding to the manipulated variable is calculated by a controlling section 5. A manipulated pulse having the height H and a predetermined width W is provided to a controlled system 6 by the controlling section 5.