Title :
Head-disk spacing control for an advanced rotary tester
Author :
Huang, Xinghui ; Gokemeijer, Nils ; Bedillion, Mark ; Chu, Patrick
Author_Institution :
Seagate Technol., Pittsburgh, PA
Abstract :
This paper discusses head-disk spacing (HDS) control for an advanced rotary tester (ART). With active control of HDS, the ART enables testing of individual recording head sliders and evaluation of novel magnetic recording processes with great flexibility. In this paper, system characterization and servo control design for the ART are presented. Various hardware and design issues are addressed and the corresponding solutions are provided. Simulation and experimental results show that the nominal HDS can be controlled to be within 10 nm with a standard variation of 1.5 nm.
Keywords :
magnetic storage; servomechanisms; ART; advanced rotary tester; head sliders; head-disk spacing control; magnetic recording; servo control design; Actuators; Assembly; Clamps; Feedback control; Magnetic heads; Magnetic recording; Sensor phenomena and characterization; Servosystems; Subspace constraints; Testing;
Conference_Titel :
American Control Conference, 2008
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-2078-0
Electronic_ISBN :
0743-1619
DOI :
10.1109/ACC.2008.4586952
