Title :
Disturbance modeling and control design for self-servo track writing
Author :
Du, Chunling ; Zhang, Jingliang ; Guo, Guoxiao
Author_Institution :
Data Storage Inst., Singapore, Singapore
Abstract :
The major disturbances in self-servo track writing are identified and modeled. Based on the disturbance models, an H2 controller together with a feedforward compensator is designed via linear matrix inequality approach to minimize the propagation tracking error from one track to the next. Furthermore, the error propagation containment effectiveness of the optimal H2 control is compared with that of proportional-integral-derivative (PID) and proportional-derivative (PD) feedback controls with the feedforward compensators. Our results show that the propagation tracking error is improved by 27% with the H2 control compared with that by PID control.
Keywords :
PD control; compensation; control system synthesis; disc drives; feedforward; linear matrix inequalities; optimal control; servomechanisms; three-term control; control design; disturbance modeling; feedforward compensator; linear matrix inequality; optimal control; propagation tracking error; proportional-derivative feedback control; proportional-integral-derivative control; self-servo track writing; Control design; Error correction; Feedback control; Linear matrix inequalities; Optimal control; PD control; Pi control; Proportional control; Three-term control; Writing; Linear matrix inequality; optimal control; self-servo track writing; servo track writing;
Journal_Title :
Mechatronics, IEEE/ASME Transactions on
DOI :
10.1109/TMECH.2004.835343