Title :
Control design for self-servo track writing using a state-space disturbance observer
Author :
Kang, H. ; Lee, C. ; Chung, C.
Author_Institution :
Dep. of Electr. Eng., Hanyang Univ., Seoul
Abstract :
In this paper, we introduce a control scheme for self-servo track writing process using a state-space disturbance observer (DOB). An LQG/LTR controller with the state-space DOB is designed for feedback controller. In addition, feedforward control for reference correction signal is designed to prevent the radial error propagation. The proposed method is validated by simulation results which show improvements in DC track spacing and AC track squeeze of the written tracks.
Keywords :
control system synthesis; disc drives; feedforward; linear quadratic Gaussian control; observers; servomechanisms; state-space methods; AC track squeeze; DC track spacing; LQG-LTR controller; control design; feedback controller; feedforward control; radial error propagation; reference correction signal; self-servo track writing; state-space disturbance observer; Adaptive control; Control design; Control systems; Error correction; Frequency; Rail to rail outputs; Signal design; Transfer functions; US Department of Defense; Writing; LQG/LTR; Servo track writing; disturbance observer; self-servo track writing;
Conference_Titel :
Magnetic Recording Conference, 2009. APMRC '09. Asia-Pacific
Conference_Location :
Singapore
Print_ISBN :
978-9810-82191-3
DOI :
10.1109/APMRC.2009.4925393
