Title :
Head disk spacing variation suppression via active flying height control
Author :
Liu, Xinqun ; Li, Amei ; Clegg, Warwick ; Jenkins, David ; Davey, Paul
Author_Institution :
Centre for Res. in Inf. Storage Technol., Plymouth Univ., UK
Abstract :
A novel active flying height control method is proposed for the suppression of head-disk spacing variation in hard disk drives under shock or vibration conditions. A thermal signal detection method is used for real-time derivation of spacing variation signal for feedback control. Design details of the servo control system are given. Simulation results are provided to demonstrate the effectiveness of the method
Keywords :
adaptive signal detection; closed loop systems; disc drives; feedback; hard discs; high-pass filters; servomechanisms; spatial variables control; step response; tracking; vibration control; active flying height control; closed loop control system; feedback control; hard disk drives; head disk spacing variation suppression; high pass filter; inverse filter; real-time derivation; servo control system; shock conditions; spacing variation signal; step response; thermal signal detection method; tracking; vibration conditions; Disk recording; Electric shock; Feedback control; Giant magnetoresistance; Hard disks; Magnetic heads; Magnetic recording; Pensions; Signal detection; Vibration control;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928205
