Title :
Multi-rate controller for hard disk drive with redesign of state estimator
Author :
Hara, Takeyori ; Tomizuka, Masayoshi
Author_Institution :
File Memory Lab., Fujitsu Labs. Ltd., Tokyo, Japan
Abstract :
This paper describes a new multi-rate controller for hard disk drives, which has a modified state estimator to correct estimated states not only at measurement instances of the position error signal but also at every control instance of updating the control input. This modification makes the control input smoother compared to the conventional multi-rate scheme. The effectiveness of the modified scheme is demonstrated by experiments
Keywords :
continuous time systems; electric drives; hard discs; multivariable control systems; position control; servomechanisms; state estimation; continuous time systems; hard disk drive; multirate controller; position control; servomechanism; state estimation; Control systems; Equations; Error correction; Estimation error; Frequency; Hard disks; Open loop systems; Sampling methods; Servomechanisms; State estimation;
Conference_Titel :
American Control Conference, 1998. Proceedings of the 1998
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-4530-4
DOI :
10.1109/ACC.1998.688414
