Reduction of flow-induced suspension vibrations in a hard disk drive by dual-stage suspension control

• Published in: IEEE transactions on magnetics Vol. 39; no. 5; pp. 2237 - 2239
• Main Authors: Teerhuis, A.P., Cools, S.J.M., De Callafon, R.A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.09.2003; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithm design and analysis; Applied sciences; Control design; Drives; Electronics; Error correction; Exact sciences and technology; Hard disks; Magnetic and optical mass memories; Magnetic separation; Magnetism; Optimal control; Other magnetic recording and storage devices (including tapes, disks, and drums); Predictive models; Stochastic processes; Storage and reproduction of information; Vibration control; Disk drive; Hard disks; optimal control; Vibration control; Magnetic disk; Hard disk; Experimental study; Magnetic recording
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2003.815441

A control design methodology is proposed to control an active dual-stage suspension for the reduction of flow-induced vibrations (windage) in a hard disk drive. The design of the controller uses dynamical models of both the suspension and the stochastic behavior of the windage to design a low third-order discrete-time feedback controller to reduce windage-induced track misregistration. Experimental results show that nonrepeatable runout errors due to windage are reduced by an order of a magnitude.