Title :
Proposal of perfect tracking and perfect disturbance rejection control by multirate sampling and applications to hard disk drive control
Author :
Fujimoto, Hiroshi ; Hori, Yoichi ; Yamaguchi, Takashi ; Nakagawa, Shinsuke
Author_Institution :
Dept. of Electr. Eng., Tokyo Univ., Japan
Abstract :
Multirate two-degree-of-freedom controllers are proposed for digital control systems, where there is a restriction that the speed of the A/D converters are slower than that of the D/A converters. The proposed feedforward controller assures the perfect tracking at M inter-sampling points. Moreover, the proposed feedback controller assures the perfect disturbance rejection at M inter-sample points in the steady state. Illustrative examples of position control for hard disk drive are presented, and the advantages of this approach are demonstrated
Keywords :
continuous time systems; control system synthesis; digital control; disc drives; feedback; feedforward; hard discs; observers; position control; sampled data systems; state-space methods; feedback controller; feedforward controller; hard disk drive control; multirate sampling; multirate two-degree-of-freedom controllers; perfect disturbance rejection control; perfect tracking; steady state; Actuators; Control systems; Digital control; Hard disks; Hardware; Position control; Proposals; Sampling methods; Steady-state; Velocity control;
Conference_Titel :
Decision and Control, 1999. Proceedings of the 38th IEEE Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5250-5
DOI :
10.1109/CDC.1999.833393
