Title :
Two degree-of-freedom controllers for hard disk drives with novel reference signal generation
Author :
Hara, Susumu ; Hara, Takeyori ; Yi, Li ; Timizuka, M.
Author_Institution :
Dept. of Syst. Design Eng., Keio Univ., Yokohama, Japan
Abstract :
Considers the determination of reference trajectories for use with a two-degree-of-freedom (2-DOF) controller for the head positioning of hard disk drives (HDDs). The reference trajectories are designed in two stages-off-line simulation and online reference generation. The HDD model used for the design includes the back e.m.f. of the voice coil motor. In the second stage, the idea of SMART (Structural vibration Minimized AcceleRation Trajectory) is utilized to adjust the errors at the end of the trajectories. 2-DOF control with the proposed reference trajectory is compared to conventional mode switching control, and its effectiveness is verified. To minimize performance degradation due to disturbances and uncertainties, the use of adaptive robust control (ARC) is suggested
Keywords :
adaptive control; disc drives; hard discs; position control; robust control; 2 DOF controller; SMART; adaptive robust control; hard disk drives; head positioning; off-line simulation; online reference generation; performance degradation; reference signal generation; reference trajectories; structural vibration minimized acceleration trajectory; two degree-of-freedom controllers; Acceleration; Adaptive control; Coils; Degradation; Error correction; Hard disks; Programmable control; Robust control; Uncertainty; Vibration control;
Conference_Titel :
American Control Conference, 1999. Proceedings of the 1999
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4990-3
DOI :
10.1109/ACC.1999.786326
