Simultaneous design of mechanism and control system for smart structures (optimization of piezoelectric placement and application to magnetic disk drive)

2003 ◽  
Author(s):  
F. Ohashil ◽  
I. Kajiwara ◽  
T. Omori ◽  
T. Arisaka
Keyword(s):  
Control System ◽  
Smart Structures ◽  
Disk Drive ◽  
Magnetic Disk ◽  
Simultaneous Design ◽  
And Control

Dynamic Analysis and Control of a Double-Carriage Rotary Actuator for Accurate Magnetic Disk Head Positioning

1991 ◽  
Vol 113 (4) ◽  
pp. 434-440 ◽  
Author(s):  
T. Kakizaki ◽  
M. Mizukami ◽  
K. Kogure
Keyword(s):  
Dynamic Analysis ◽  
High Speed ◽  
Disk Drive ◽  
Magnetic Disk ◽  
Rotary Actuator ◽  
Head Positioning ◽  
Mode Vibration ◽  
Major Factors ◽  
Rolling Mode ◽  
And Control

Dynamic analysis and control for accurate magnetic disk head positioning using a compact double-carriage rotary actuator is presented. Rolling mode vibration, due to a small dynamic imbalance in the head arm carriage, is one of the major factors in positioning servo instability. To avoid such vibration, structural symmetry should be maintained along the actuator pivot axis. Vibration interaction in the double-carriage rotary actuator is also clarified by mathematical modeling of a disk drive. The positioning error due to the interaction is reduced by one-third to the submicron order, even during very high-speed accessing, by a cross-feedforward decoupling control using a precompensator based on the model.

scholarly journals Simultaneous Optimal Design of Piezoelectric Shape/Placement and Control System for Smart Structures.

2002 ◽  
Vol 68 (674) ◽  
pp. 2925-2932 ◽  
Author(s):  
Itsuro KAJIWARA ◽  
Manabu UEHARA ◽  
Takahiro OMORI ◽  
Fumitake OHASHI
Keyword(s):  
Control System ◽  
Optimal Design ◽  
Smart Structures ◽  
And Control
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